/*
MIT License

Copyright (c) 2010-2020 nsf <no.smile.face@gmail.com>
              2015-2024 Adam Saponara <as@php.net>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

IMPORTANT: This is based on termbox2. The original source has been modified to
keep only the input handling. It is adapted for working with the music player
kew, which handles setting non-blocking mode itself.

*/

#ifndef TERMBOX_H_INCL
#define TERMBOX_H_INCL

#ifndef _XOPEN_SOURCE
#define _XOPEN_SOURCE
#endif

#ifndef _DEFAULT_SOURCE
#define _DEFAULT_SOURCE
#endif

#include "common/path_max.h"

#include <fcntl.h>
#include <limits.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <wchar.h>

#ifdef _WIN32
#include <io.h>
#include <synchapi.h>
#include <windows.h>
#else
#include <sys/ioctl.h> /* ioctl */
#include <sys/select.h>
#include <termios.h>
#endif

#define TB_PATH_MAX KEW_PATH_MAX

#ifdef __cplusplus
extern "C" {
#endif

// __ffi_start

#define TB_VERSION_STR "2.5.0"

/* The following compile-time options are supported:
 *
 *     TB_OPT_ATTR_W: Integer width of fg and bg attributes. Valid values
 *                    (assuming system support) are 16, 32, and 64. (See
 *                    uintattr_t). 32 or 64 enables output mode
 *                    TB_OUTPUT_TRUECOLOR. 64 enables additional style
 *                    attributes. (See tb_set_output_mode.) Larger values
 *                    consume more memory in exchange for more features.
 *                    Defaults to 16.
 *
 *        TB_OPT_EGC: If set, enable extended grapheme cluster support
 *                    (tb_extend_cell, tb_set_cell_ex). Consumes more memory.
 *                    Defaults off.
 *
 * TB_OPT_PRINTF_BUF: Write buffer size for printf operations. Represents the
 *                    largest string that can be sent in one call to tb_print*
 *                    and tb_send* functions. Defaults to 4096.
 *
 *   TB_OPT_READ_BUF: Read buffer size for tty reads. Defaults to 64.
 *
 *  TB_OPT_TRUECOLOR: Deprecated. Sets TB_OPT_ATTR_W to 32 if not already set.
 */

#if defined(TB_LIB_OPTS) || 0 // __tb_lib_opts
/* Ensure consistent compile-time options when using as a shared library */
#undef TB_OPT_ATTR_W
#undef TB_OPT_EGC
#undef TB_OPT_PRINTF_BUF
#undef TB_OPT_READ_BUF
#define TB_OPT_ATTR_W 64
#define TB_OPT_EGC
#endif

/* Ensure sane `TB_OPT_ATTR_W` (16, 32, or 64) */
#if defined TB_OPT_ATTR_W && TB_OPT_ATTR_W == 16
#elif defined TB_OPT_ATTR_W && TB_OPT_ATTR_W == 32
#elif defined TB_OPT_ATTR_W && TB_OPT_ATTR_W == 64
#else
#undef TB_OPT_ATTR_W
#if defined TB_OPT_TRUECOLOR // Deprecated. Back-compat for old flag.
#define TB_OPT_ATTR_W 32
#else
#define TB_OPT_ATTR_W 16
#endif
#endif

/* ASCII key constants (`tb_event.key`) */
#define TB_KEY_CTRL_TILDE 0x00
#define TB_KEY_CTRL_2 0x00 // clash with `CTRL_TILDE`
#define TB_KEY_CTRL_A 0x01
#define TB_KEY_CTRL_B 0x02
#define TB_KEY_CTRL_C 0x03
#define TB_KEY_CTRL_D 0x04
#define TB_KEY_CTRL_E 0x05
#define TB_KEY_CTRL_F 0x06
#define TB_KEY_CTRL_G 0x07
#define TB_KEY_BACKSPACE 0x08
#define TB_KEY_CTRL_H 0x08 // clash with `CTRL_BACKSPACE`
#define TB_KEY_TAB 0x09
#define TB_KEY_CTRL_I 0x09 // clash with `TAB`
#define TB_KEY_CTRL_J 0x0a
#define TB_KEY_CTRL_K 0x0b
#define TB_KEY_CTRL_L 0x0c
#define TB_KEY_ENTER 0x0d
#define TB_KEY_CTRL_M 0x0d // clash with `ENTER`
#define TB_KEY_CTRL_N 0x0e
#define TB_KEY_CTRL_O 0x0f
#define TB_KEY_CTRL_P 0x10
#define TB_KEY_CTRL_Q 0x11
#define TB_KEY_CTRL_R 0x12
#define TB_KEY_CTRL_S 0x13
#define TB_KEY_CTRL_T 0x14
#define TB_KEY_CTRL_U 0x15
#define TB_KEY_CTRL_V 0x16
#define TB_KEY_CTRL_W 0x17
#define TB_KEY_CTRL_X 0x18
#define TB_KEY_CTRL_Y 0x19
#define TB_KEY_CTRL_Z 0x1a
#define TB_KEY_ESC 0x1b
#define TB_KEY_CTRL_LSQ_BRACKET 0x1b // clash with 'ESC'
#define TB_KEY_CTRL_3 0x1b           // clash with 'ESC'
#define TB_KEY_CTRL_4 0x1c
#define TB_KEY_CTRL_BACKSLASH 0x1c // clash with 'CTRL_4'
#define TB_KEY_CTRL_5 0x1d
#define TB_KEY_CTRL_RSQ_BRACKET 0x1d // clash with 'CTRL_5'
#define TB_KEY_CTRL_6 0x1e
#define TB_KEY_CTRL_7 0x1f
#define TB_KEY_CTRL_SLASH 0x1f      // clash with 'CTRL_7'
#define TB_KEY_CTRL_UNDERSCORE 0x1f // clash with 'CTRL_7'
#define TB_KEY_SPACE 0x20
#define TB_KEY_BACKSPACE2 0x7f
#define TB_KEY_CTRL_8 0x7f // clash with 'BACKSPACE2'

#define tb_key_i(i) 0xffff - (i)
/* Terminal-dependent key constants (`tb_event.key`) and terminfo caps */
/* BEGIN codegen h */
/* Produced by ./codegen.sh on Tue, 03 Sep 2024 04:17:47 +0000 */
#define TB_KEY_F1 (0xffff - 0)
#define TB_KEY_F2 (0xffff - 1)
#define TB_KEY_F3 (0xffff - 2)
#define TB_KEY_F4 (0xffff - 3)
#define TB_KEY_F5 (0xffff - 4)
#define TB_KEY_F6 (0xffff - 5)
#define TB_KEY_F7 (0xffff - 6)
#define TB_KEY_F8 (0xffff - 7)
#define TB_KEY_F9 (0xffff - 8)
#define TB_KEY_F10 (0xffff - 9)
#define TB_KEY_F11 (0xffff - 10)
#define TB_KEY_F12 (0xffff - 11)
#define TB_KEY_INSERT (0xffff - 12)
#define TB_KEY_DELETE (0xffff - 13)
#define TB_KEY_HOME (0xffff - 14)
#define TB_KEY_END (0xffff - 15)
#define TB_KEY_PGUP (0xffff - 16)
#define TB_KEY_PGDN (0xffff - 17)
#define TB_KEY_ARROW_UP (0xffff - 18)
#define TB_KEY_ARROW_DOWN (0xffff - 19)
#define TB_KEY_ARROW_LEFT (0xffff - 20)
#define TB_KEY_ARROW_RIGHT (0xffff - 21)
#define TB_KEY_BACK_TAB (0xffff - 22)
#define TB_KEY_MOUSE_LEFT (0xffff - 23)
#define TB_KEY_MOUSE_RIGHT (0xffff - 24)
#define TB_KEY_MOUSE_MIDDLE (0xffff - 25)
#define TB_KEY_MOUSE_RELEASE (0xffff - 26)
#define TB_KEY_MOUSE_WHEEL_UP (0xffff - 27)
#define TB_KEY_MOUSE_WHEEL_DOWN (0xffff - 28)

#define TB_CAP_F1 0
#define TB_CAP_F2 1
#define TB_CAP_F3 2
#define TB_CAP_F4 3
#define TB_CAP_F5 4
#define TB_CAP_F6 5
#define TB_CAP_F7 6
#define TB_CAP_F8 7
#define TB_CAP_F9 8
#define TB_CAP_F10 9
#define TB_CAP_F11 10
#define TB_CAP_F12 11
#define TB_CAP_INSERT 12
#define TB_CAP_DELETE 13
#define TB_CAP_HOME 14
#define TB_CAP_END 15
#define TB_CAP_PGUP 16
#define TB_CAP_PGDN 17
#define TB_CAP_ARROW_UP 18
#define TB_CAP_ARROW_DOWN 19
#define TB_CAP_ARROW_LEFT 20
#define TB_CAP_ARROW_RIGHT 21
#define TB_CAP_BACK_TAB 22
#define TB_CAP__COUNT_KEYS 23
#define TB_CAP_ENTER_CA 23
#define TB_CAP_EXIT_CA 24
#define TB_CAP_SHOW_CURSOR 25
#define TB_CAP_HIDE_CURSOR 26
#define TB_CAP_CLEAR_SCREEN 27
#define TB_CAP_SGR0 28
#define TB_CAP_UNDERLINE 29
#define TB_CAP_BOLD 30
#define TB_CAP_BLINK 31
#define TB_CAP_ITALIC 32
#define TB_CAP_REVERSE 33
#define TB_CAP_ENTER_KEYPAD 34
#define TB_CAP_EXIT_KEYPAD 35
#define TB_CAP_DIM 36
#define TB_CAP_INVISIBLE 37
#define TB_CAP__COUNT 38
/* END codegen h */

/* Some hard-coded caps */
#define TB_HARDCAP_ENTER_MOUSE "\x1b[?1000h\x1b[?1002h\x1b[?1015h\x1b[?1006h"
#define TB_HARDCAP_EXIT_MOUSE "\x1b[?1006l\x1b[?1015l\x1b[?1002l\x1b[?1000l"
#define TB_HARDCAP_STRIKEOUT "\x1b[9m"
#define TB_HARDCAP_UNDERLINE_2 "\x1b[21m"
#define TB_HARDCAP_OVERLINE "\x1b[53m"

/* Colors (numeric) and attributes (bitwise) (`tb_cell.fg`, `tb_cell.bg`) */
#define TB_DEFAULT 0x0000
#define TB_BLACK 0x0001
#define TB_RED 0x0002
#define TB_GREEN 0x0003
#define TB_YELLOW 0x0004
#define TB_BLUE 0x0005
#define TB_MAGENTA 0x0006
#define TB_CYAN 0x0007
#define TB_WHITE 0x0008

#if TB_OPT_ATTR_W == 16
#define TB_BOLD 0x0100
#define TB_UNDERLINE 0x0200
#define TB_REVERSE 0x0400
#define TB_ITALIC 0x0800
#define TB_BLINK 0x1000
#define TB_HI_BLACK 0x2000
#define TB_BRIGHT 0x4000
#define TB_DIM 0x8000
#define TB_256_BLACK TB_HI_BLACK // `TB_256_BLACK` is deprecated
#else
// `TB_OPT_ATTR_W` is 32 or 64
#define TB_BOLD 0x01000000
#define TB_UNDERLINE 0x02000000
#define TB_REVERSE 0x04000000
#define TB_ITALIC 0x08000000
#define TB_BLINK 0x10000000
#define TB_HI_BLACK 0x20000000
#define TB_BRIGHT 0x40000000
#define TB_DIM 0x80000000
#define TB_TRUECOLOR_BOLD TB_BOLD // `TB_TRUECOLOR_*` is deprecated
#define TB_TRUECOLOR_UNDERLINE TB_UNDERLINE
#define TB_TRUECOLOR_REVERSE TB_REVERSE
#define TB_TRUECOLOR_ITALIC TB_ITALIC
#define TB_TRUECOLOR_BLINK TB_BLINK
#define TB_TRUECOLOR_BLACK TB_HI_BLACK
#endif

#if TB_OPT_ATTR_W == 64
#define TB_STRIKEOUT 0x0000000100000000
#define TB_UNDERLINE_2 0x0000000200000000
#define TB_OVERLINE 0x0000000400000000
#define TB_INVISIBLE 0x0000000800000000
#endif

/* Event types (`tb_event.type`) */
#define TB_EVENT_KEY 1
#define TB_EVENT_RESIZE 2
#define TB_EVENT_MOUSE 3

/* Key modifiers (bitwise) (`tb_event.mod`) */
#define TB_MOD_ALT 1
#define TB_MOD_CTRL 2
#define TB_MOD_SHIFT 4
#define TB_MOD_MOTION 8

/* Input modes (bitwise) (`tb_set_input_mode`) */
#define TB_INPUT_CURRENT 0
#define TB_INPUT_ESC 1
#define TB_INPUT_ALT 2
#define TB_INPUT_MOUSE 4

/* Output modes (`tb_set_output_mode`) */
#define TB_OUTPUT_CURRENT 0
#define TB_OUTPUT_NORMAL 1
#define TB_OUTPUT_256 2
#define TB_OUTPUT_216 3
#define TB_OUTPUT_GRAYSCALE 4
#if TB_OPT_ATTR_W >= 32
#define TB_OUTPUT_TRUECOLOR 5
#endif

/* Common function return values unless otherwise noted.
 *
 * Library behavior is undefined after receiving `TB_ERR_MEM`. Callers may
 * attempt reinitializing by freeing memory, invoking `tb_shutdown`, then
 * `tb_init`.
 */
#define TB_OK 0
#define TB_ERR -1
#define TB_ERR_NEED_MORE -2
#define TB_ERR_INIT_ALREADY -3
#define TB_ERR_INIT_OPEN -4
#define TB_ERR_MEM -5
#define TB_ERR_NO_EVENT -6
#define TB_ERR_NO_TERM -7
#define TB_ERR_NOT_INIT -8
#define TB_ERR_OUT_OF_BOUNDS -9
#define TB_ERR_READ -10
#define TB_ERR_RESIZE_IOCTL -11
#define TB_ERR_RESIZE_PIPE -12
#define TB_ERR_RESIZE_SIGACTION -13
#define TB_ERR_POLL -14
#define TB_ERR_TCGETATTR -15
#define TB_ERR_TCSETATTR -16
#define TB_ERR_UNSUPPORTED_TERM -17
#define TB_ERR_RESIZE_WRITE -18
#define TB_ERR_RESIZE_POLL -19
#define TB_ERR_RESIZE_READ -20
#define TB_ERR_RESIZE_SSCANF -21
#define TB_ERR_CAP_COLLISION -22

#define TB_ERR_SELECT TB_ERR_POLL
#define TB_ERR_RESIZE_SELECT TB_ERR_RESIZE_POLL

/* Deprecated. Function types to be used with `tb_set_func`. */
#define TB_FUNC_EXTRACT_PRE 0
#define TB_FUNC_EXTRACT_POST 1

/* Define this to set the size of the buffer used in `tb_printf`
 * and `tb_sendf`
 */
#ifndef TB_OPT_PRINTF_BUF
#define TB_OPT_PRINTF_BUF 4096
#endif

/* Define this to set the size of the read buffer used when reading
 * from the tty
 */
#ifndef TB_OPT_READ_BUF
#define TB_OPT_READ_BUF 64
#endif

/* Define this for limited back compat with termbox v1 */
#ifdef TB_OPT_V1_COMPAT
#define tb_change_cell tb_set_cell
#define tb_put_cell(x, y, c) tb_set_cell((x), (y), (c)->ch, (c)->fg, (c)->bg)
#define tb_set_clear_attributes tb_set_clear_attrs
#define tb_select_input_mode tb_set_input_mode
#define tb_select_output_mode tb_set_output_mode
#endif

/* Define these to swap in a different allocator */
#ifndef tb_malloc
#define tb_malloc malloc
#define tb_realloc realloc
#define tb_free free
#endif

#if TB_OPT_ATTR_W == 64
typedef uint64_t uintattr_t;
#elif TB_OPT_ATTR_W == 32
typedef uint32_t uintattr_t;
#else // 16
typedef uint16_t uintattr_t;
#endif

/* A cell in a 2d grid representing the terminal screen.
 *
 * The terminal screen is represented as 2d array of cells. The structure is
 * optimized for dealing with single-width (`wcwidth==1`) Unicode codepoints,
 * however some support for grapheme clusters (e.g., combining diacritical
 * marks) and wide codepoints (e.g., Hiragana) is provided through `ech`,
 * `nech`, and `cech` via `tb_set_cell_ex`. `ech` is only valid when `nech>0`,
 * otherwise `ch` is used.
 *
 * For non-single-width codepoints, given `N=wcwidth(ch)/wcswidth(ech)`:
 *
 * when `N==0`: termbox forces a single-width cell. Callers should avoid this
 *              if aiming to render text accurately. Callers may use
 *              `tb_set_cell_ex` or `tb_print*` to render `N==0` combining
 *              characters.
 *
 *  when `N>1`: termbox zeroes out the following `N-1` cells and skips sending
 *              them to the tty. So, e.g., if the caller sets `x=0,y=0` to an
 *              `N==2` codepoint, the caller's next set should be at `x=2,y=0`.
 *              Anything set at `x=1,y=0` will be ignored. If there are not
 *              enough columns remaining on the line to render `N` width, spaces
 *              are sent instead.
 *
 * See `tb_present` for implementation.
 */
struct tb_cell {
        uint32_t ch;   // a Unicode codepoint
        uintattr_t fg; // bitwise foreground attributes
        uintattr_t bg; // bitwise background attributes
#ifdef TB_OPT_EGC
        uint32_t *ech; // a grapheme cluster of Unicode codepoints, 0-terminated
        size_t nech;   // num elements in ech, 0 means use ch instead of ech
        size_t cech;   // num elements allocated for ech
#endif
};

/* An incoming event from the tty.
 *
 * Given the event type, the following fields are relevant:
 *
 *    when `TB_EVENT_KEY`: `key` xor `ch` (one will be zero) and `mod`. Note
 *                         there is overlap between `TB_MOD_CTRL` and
 *                         `TB_KEY_CTRL_*`. `TB_MOD_CTRL` and `TB_MOD_SHIFT` are
 *                         only set as modifiers to `TB_KEY_ARROW_*`.
 *
 * when `TB_EVENT_RESIZE`: `w` and `h`
 *
 *  when `TB_EVENT_MOUSE`: `key` (`TB_KEY_MOUSE_*`), `x`, and `y`
 */
struct tb_event {
        uint8_t type; // one of `TB_EVENT_*` constants
        uint8_t mod;  // bitwise `TB_MOD_*` constants
        uint16_t key; // one of `TB_KEY_*` constants
        uint32_t ch;  // a Unicode codepoint
        int32_t w;    // resize width
        int32_t h;    // resize height
        int32_t x;    // mouse x
        int32_t y;    // mouse y
};

/* Initialize the termbox library. This function should be called before any
 * other functions. `tb_init` is equivalent to `tb_init_file("/dev/tty")`. After
 * successful initialization, the library must be finalized using `tb_shutdown`.
 */
int tb_init(void);
int tb_init_file(const char *path);
int tb_init_fd(int ttyfd);
int tb_init_rwfd(int rfd, int wfd);
int tb_shutdown(void);
int tb_get_input_fd(void);
int tb_get_output_fd(void);

/* Return the size of the internal back buffer (which is the same as terminal's
 * window size in rows and columns). The internal buffer can be resized after
 * `tb_clear` or `tb_present` calls. Both dimensions have an unspecified
 * negative value when called before `tb_init` or after `tb_shutdown`.
 */

/* Clear the internal back buffer using `TB_DEFAULT` or the attributes set by
 * `tb_set_clear_attrs`.
 */
int tb_clear(void);

/* Synchronize the internal back buffer with the terminal by writing to tty. */
//int tb_present(void);

/* Clear the internal front buffer effectively forcing a complete re-render of
 * the back buffer to the tty. It is not necessary to call this under normal
 * circumstances. */
int tb_invalidate(void);

/* Set the position of the cursor. Upper-left cell is (0, 0). */
int tb_set_cursor(int cx, int cy);
int tb_hide_cursor(void);

/* Set cell contents in the internal back buffer at the specified position.
 *
 * Use `tb_set_cell_ex` for rendering grapheme clusters (e.g., combining
 * diacritical marks).
 *
 * Calling `tb_set_cell(x, y, ch, fg, bg)` is equivalent to
 * `tb_set_cell_ex(x, y, &ch, 1, fg, bg)`.
 *
 * `tb_extend_cell` is a shortcut for appending 1 codepoint to `tb_cell.ech`.
 *
 * Non-printable (`iswprint(3)`) codepoints are replaced with `U+FFFD` at render
 * time.
 */
int tb_set_cell(int x, int y, uint32_t ch, uintattr_t fg, uintattr_t bg);
int tb_set_cell_ex(int x, int y, uint32_t *ch, size_t nch, uintattr_t fg,
                   uintattr_t bg);
int tb_extend_cell(int x, int y, uint32_t ch);

/* Set the input mode. Termbox has two input modes:
 *
 * 1. `TB_INPUT_ESC`
 *    When escape (`\x1b`) is in the buffer and there's no match for an escape
 *    sequence, a key event for `TB_KEY_ESC` is returned.
 *
 * 2. `TB_INPUT_ALT`
 *    When escape (`\x1b`) is in the buffer and there's no match for an escape
 *    sequence, the next keyboard event is returned with a `TB_MOD_ALT`
 *    modifier.
 *
 * You can also apply `TB_INPUT_MOUSE` via bitwise OR operation to either of the
 * modes (e.g., `TB_INPUT_ESC | TB_INPUT_MOUSE`) to receive `TB_EVENT_MOUSE`
 * events. If none of the main two modes were set, but the mouse mode was,
 * `TB_INPUT_ESC` is used. If for some reason you've decided to use
 * `TB_INPUT_ESC | TB_INPUT_ALT`, it will behave as if only `TB_INPUT_ESC` was
 * selected.
 *
 * If mode is `TB_INPUT_CURRENT`, return the current input mode.
 *
 * The default input mode is `TB_INPUT_ESC`.
 */
int tb_set_input_mode(int mode);

/* Set the output mode. Termbox has multiple output modes:
 *
 * 1. `TB_OUTPUT_NORMAL`     => [0..8]
 *
 *    This mode provides 8 different colors:
 *      `TB_BLACK`, `TB_RED`, `TB_GREEN`, `TB_YELLOW`,
 *      `TB_BLUE`, `TB_MAGENTA`, `TB_CYAN`, `TB_WHITE`
 *
 *    Plus `TB_DEFAULT` which skips sending a color code (i.e., uses the
 *    terminal's default color).
 *
 *    Colors (including `TB_DEFAULT`) may be bitwise OR'd with attributes:
 *      `TB_BOLD`, `TB_UNDERLINE`, `TB_REVERSE`, `TB_ITALIC`, `TB_BLINK`,
 *      `TB_BRIGHT`, `TB_DIM`
 *
 *    The following style attributes are also available if compiled with
 *    `TB_OPT_ATTR_W` set to 64:
 *      `TB_STRIKEOUT`, `TB_UNDERLINE_2`, `TB_OVERLINE`, `TB_INVISIBLE`
 *
 *    As in all modes, the value 0 is interpreted as `TB_DEFAULT` for
 *    convenience.
 *
 *    Some notes: `TB_REVERSE` and `TB_BRIGHT` can be applied as either `fg` or
 *    `bg` attributes for the same effect. The rest of the attributes apply to
 *    `fg` only and are ignored as `bg` attributes.
 *
 *    Example usage: `tb_set_cell(x, y, '@', TB_BLACK | TB_BOLD, TB_RED)`
 *
 * 2. `TB_OUTPUT_256`        => [0..255] + `TB_HI_BLACK`
 *
 *    In this mode you get 256 distinct colors (plus default):
 *                0x00   (1): `TB_DEFAULT`
 *       `TB_HI_BLACK`   (1): `TB_BLACK` in `TB_OUTPUT_NORMAL`
 *          0x01..0x07   (7): the next 7 colors as in `TB_OUTPUT_NORMAL`
 *          0x08..0x0f   (8): bright versions of the above
 *          0x10..0xe7 (216): 216 different colors
 *          0xe8..0xff  (24): 24 different shades of gray
 *
 *    All `TB_*` style attributes except `TB_BRIGHT` may be bitwise OR'd as in
 *    `TB_OUTPUT_NORMAL`.
 *
 *    Note `TB_HI_BLACK` must be used for black, as 0x00 represents default.
 *
 * 3. `TB_OUTPUT_216`        => [0..216]
 *
 *    This mode supports the 216-color range of `TB_OUTPUT_256` only, but you
 *    don't need to provide an offset:
 *                0x00   (1): `TB_DEFAULT`
 *          0x01..0xd8 (216): 216 different colors
 *
 * 4. `TB_OUTPUT_GRAYSCALE`  => [0..24]
 *
 *    This mode supports the 24-color range of `TB_OUTPUT_256` only, but you
 *    don't need to provide an offset:
 *                0x00   (1): `TB_DEFAULT`
 *          0x01..0x18  (24): 24 different shades of gray
 *
 * 5. `TB_OUTPUT_TRUECOLOR`  => [0x000000..0xffffff] + `TB_HI_BLACK`
 *
 *    This mode provides 24-bit color on supported terminals. The format is
 *    0xRRGGBB.
 *
 *    All `TB_*` style attributes except `TB_BRIGHT` may be bitwise OR'd as in
 *    `TB_OUTPUT_NORMAL`.
 *
 *    Note `TB_HI_BLACK` must be used for black, as 0x000000 represents default.
 *
 * To use the terminal default color (i.e., to not send an escape code), pass
 * `TB_DEFAULT`. For convenience, the value 0 is interpreted as `TB_DEFAULT` in
 * all modes.
 *
 * Note, cell attributes persist after switching output modes. Any translation
 * between, for example, `TB_OUTPUT_NORMAL`'s `TB_RED` and
 * `TB_OUTPUT_TRUECOLOR`'s 0xff0000 must be performed by the caller. Also note
 * that cells previously rendered in one mode may persist unchanged until the
 * front buffer is cleared (such as after a resize event) at which point it will
 * be re-interpreted and flushed according to the current mode. Callers may
 * invoke `tb_invalidate` if it is desirable to immediately re-interpret and
 * flush the entire screen according to the current mode.
 *
 * Note, not all terminals support all output modes, especially beyond
 * `TB_OUTPUT_NORMAL`. There is also no very reliable way to determine color
 * support dynamically. If portability is desired, callers are recommended to
 * use `TB_OUTPUT_NORMAL` or make output mode end-user configurable. The same
 * advice applies to style attributes.
 *
 * If mode is `TB_OUTPUT_CURRENT`, return the current output mode.
 *
 * The default output mode is `TB_OUTPUT_NORMAL`.
 */
int tb_set_output_mode(int mode);

/* Wait for an event up to `timeout_ms` milliseconds and populate `event` with
 * it. If no event is available within the timeout period, `TB_ERR_NO_EVENT`
 * is returned. On a resize event, the underlying `select(2)` call may be
 * interrupted, yielding a return code of `TB_ERR_POLL`. In this case, you may
 * check `errno` via `tb_last_errno`. If it's `EINTR`, you may elect to ignore
 * that and call `tb_peek_event` again.
 */
int tb_peek_event(struct tb_event *event, int timeout_ms);

/* Same as `tb_peek_event` except no timeout. */
int tb_poll_event(struct tb_event *event);

/* Internal termbox fds that can be used with `poll(2)`, `select(2)`, etc.
 * externally. Callers must invoke `tb_poll_event` or `tb_peek_event` if
 * fds become readable. */
int tb_get_fds(int *ttyfd, int *resizefd);

/* Print and printf functions. Specify param `out_w` to determine width of
 * printed string. Strings are interpreted as UTF-8.
 *
 * Non-printable characters (`iswprint(3)`) and truncated UTF-8 byte sequences
 * are replaced with U+FFFD.
 *
 * Newlines (`\n`) are supported with the caveat that `out_w` will return the
 * width of the string as if it were on a single line.
 *
 * If the starting coordinate is out of bounds, `TB_ERR_OUT_OF_BOUNDS` is
 * returned. If the starting coordinate is in bounds, but goes out of bounds,
 * then the out-of-bounds portions of the string are ignored.
 *
 * For finer control, use `tb_set_cell`.
 */
int tb_print(int x, int y, uintattr_t fg, uintattr_t bg, const char *str);
int tb_printf(int x, int y, uintattr_t fg, uintattr_t bg, const char *fmt, ...);
int tb_print_ex(int x, int y, uintattr_t fg, uintattr_t bg, size_t *out_w,
                const char *str);
int tb_printf_ex(int x, int y, uintattr_t fg, uintattr_t bg, size_t *out_w,
                 const char *fmt, ...);

/* Send raw bytes to terminal. */
int tb_send(const char *buf, size_t nbuf);
int tb_sendf(const char *fmt, ...);

/* Deprecated. Set custom callbacks. `fn_type` is one of `TB_FUNC_*` constants,
 * `fn` is a compatible function pointer, or NULL to clear.
 *
 * `TB_FUNC_EXTRACT_PRE`:
 *   If specified, invoke this function BEFORE termbox tries to extract any
 *   escape sequences from the input buffer.
 *
 * `TB_FUNC_EXTRACT_POST`:
 *   If specified, invoke this function AFTER termbox tries (and fails) to
 *   extract any escape sequences from the input buffer.
 */
int tb_set_func(int fn_type, int (*fn)(struct tb_event *, size_t *));

/* Return byte length of codepoint given first byte of UTF-8 sequence (1-6). */
int tb_utf8_char_length(char c);

/* Convert UTF-8 null-terminated byte sequence to UTF-32 codepoint.
 *
 * If `c` is an empty C string, return 0. `out` is left unchanged.
 *
 * If a null byte is encountered in the middle of the codepoint, return a
 * negative number indicating how many bytes were processed. `out` is left
 * unchanged.
 *
 * Otherwise, return byte length of codepoint (1-6).
 */
int tb_utf8_char_to_unicode(uint32_t *out, const char *c);

/* Convert UTF-32 codepoint to UTF-8 null-terminated byte sequence.
 *
 * `out` must be char[7] or greater. Return byte length of codepoint (1-6).
 */
int tb_utf8_unicode_to_char(char *out, uint32_t c);

/* Library utility functions */
int tb_last_errno(void);
const char *tb_strerror(int err);
struct tb_cell *tb_cell_buffer(void); // Deprecated
int tb_has_truecolor(void);
int tb_has_egc(void);
int tb_attr_width(void);
const char *tb_version(void);

/* Deprecation notice!
 *
 * The following will be removed in version 3.x (ABI version 3):
 *
 *   TB_256_BLACK           (use TB_HI_BLACK)
 *   TB_OPT_TRUECOLOR       (use TB_OPT_ATTR_W)
 *   TB_TRUECOLOR_BOLD      (use TB_BOLD)
 *   TB_TRUECOLOR_UNDERLINE (use TB_UNDERLINE)
 *   TB_TRUECOLOR_REVERSE   (use TB_REVERSE)
 *   TB_TRUECOLOR_ITALIC    (use TB_ITALICe)
 *   TB_TRUECOLOR_BLINK     (use TB_BLINK)
 *   TB_TRUECOLOR_BLACK     (use TB_HI_BLACK)
 *   tb_cell_buffer
 *   tb_set_func
 *   TB_FUNC_EXTRACT_PRE
 *   TB_FUNC_EXTRACT_POST
 */

#ifdef __cplusplus
}
#endif

#endif // TERMBOX_H_INCL

#ifdef TB_IMPL

#define if_err_return(rv, expr)       \
        if (((rv) = (expr)) != TB_OK) \
        return (rv)
#define if_err_break(rv, expr)        \
        if (((rv) = (expr)) != TB_OK) \
        break
#define if_ok_return(rv, expr)        \
        if (((rv) = (expr)) == TB_OK) \
        return (rv)
#define if_ok_or_need_more_return(rv, expr)                       \
        if (((rv) = (expr)) == TB_OK || (rv) == TB_ERR_NEED_MORE) \
        return (rv)

#define if_not_init_return()     \
        if (!global.initialized) \
        return TB_ERR_NOT_INIT

#define snprintf_or_return(rv, str, sz, fmt, ...)                 \
        do {                                                      \
                (rv) = snprintf((str), (sz), (fmt), __VA_ARGS__); \
                if ((rv) < 0 || (rv) >= (int)(sz))                \
                        return TB_ERR;                            \
        } while (0)

struct bytebuf_t {
        char *buf;
        size_t len;
        size_t cap;
};

struct cellbuf_t {
        int width;
        int height;
        struct tb_cell *cells;
};

struct cap_trie_t {
        char c;
        struct cap_trie_t *children;
        size_t nchildren;
        int is_leaf;
        uint16_t key;
        uint8_t mod;
};

struct tb_global_t {
#ifdef _WIN32
        HANDLE hin;
        HANDLE hout;
        DWORD original_mode;
#endif
        int ttyfd;
        int rfd;
        int wfd;
        int ttyfd_open;
        int resize_pipefd[2];
        int width;
        int height;
        int cursor_x;
        int cursor_y;
        int last_x;
        int last_y;
        uintattr_t fg;
        uintattr_t bg;
        uintattr_t last_fg;
        uintattr_t last_bg;
        int input_mode;
        int output_mode;
        char *terminfo;
        size_t nterminfo;
        const char *caps[TB_CAP__COUNT];
        struct cap_trie_t cap_trie;
        struct bytebuf_t in;
        struct bytebuf_t out;
        struct cellbuf_t back;
        struct cellbuf_t front;
#ifdef _WIN32
        DWORD orig_tios[2];
#else
        struct termios orig_tios;
#endif
        int has_orig_tios;
        int last_errno;
        int initialized;
        int (*fn_extract_esc_pre)(struct tb_event *, size_t *);
        int (*fn_extract_esc_post)(struct tb_event *, size_t *);
        int esc_pending;
        char errbuf[1024];
};

static struct tb_global_t global = {0};

/* BEGIN codegen c */
/* Produced by ./codegen.sh on Tue, 03 Sep 2024 04:17:48 +0000 */

static const int16_t terminfo_cap_indexes[] = {
    66,  // kf1 (TB_CAP_F1)
    68,  // kf2 (TB_CAP_F2)
    69,  // kf3 (TB_CAP_F3)
    70,  // kf4 (TB_CAP_F4)
    71,  // kf5 (TB_CAP_F5)
    72,  // kf6 (TB_CAP_F6)
    73,  // kf7 (TB_CAP_F7)
    74,  // kf8 (TB_CAP_F8)
    75,  // kf9 (TB_CAP_F9)
    67,  // kf10 (TB_CAP_F10)
    216, // kf11 (TB_CAP_F11)
    217, // kf12 (TB_CAP_F12)
    77,  // kich1 (TB_CAP_INSERT)
    59,  // kdch1 (TB_CAP_DELETE)
    76,  // khome (TB_CAP_HOME)
    164, // kend (TB_CAP_END)
    82,  // kpp (TB_CAP_PGUP)
    81,  // knp (TB_CAP_PGDN)
    87,  // kcuu1 (TB_CAP_ARROW_UP)
    61,  // kcud1 (TB_CAP_ARROW_DOWN)
    79,  // kcub1 (TB_CAP_ARROW_LEFT)
    83,  // kcuf1 (TB_CAP_ARROW_RIGHT)
    148, // kcbt (TB_CAP_BACK_TAB)
    28,  // smcup (TB_CAP_ENTER_CA)
    40,  // rmcup (TB_CAP_EXIT_CA)
    16,  // cnorm (TB_CAP_SHOW_CURSOR)
    13,  // civis (TB_CAP_HIDE_CURSOR)
    5,   // clear (TB_CAP_CLEAR_SCREEN)
    39,  // sgr0 (TB_CAP_SGR0)
    36,  // smul (TB_CAP_UNDERLINE)
    27,  // bold (TB_CAP_BOLD)
    26,  // blink (TB_CAP_BLINK)
    311, // sitm (TB_CAP_ITALIC)
    34,  // rev (TB_CAP_REVERSE)
    89,  // smkx (TB_CAP_ENTER_KEYPAD)
    88,  // rmkx (TB_CAP_EXIT_KEYPAD)
    30,  // dim (TB_CAP_DIM)
    32,  // invis (TB_CAP_INVISIBLE)
};

// xterm
static const char *xterm_caps[] = {
    "\033OP",                  // kf1 (TB_CAP_F1)
    "\033OQ",                  // kf2 (TB_CAP_F2)
    "\033OR",                  // kf3 (TB_CAP_F3)
    "\033OS",                  // kf4 (TB_CAP_F4)
    "\033[15~",                // kf5 (TB_CAP_F5)
    "\033[17~",                // kf6 (TB_CAP_F6)
    "\033[18~",                // kf7 (TB_CAP_F7)
    "\033[19~",                // kf8 (TB_CAP_F8)
    "\033[20~",                // kf9 (TB_CAP_F9)
    "\033[21~",                // kf10 (TB_CAP_F10)
    "\033[23~",                // kf11 (TB_CAP_F11)
    "\033[24~",                // kf12 (TB_CAP_F12)
    "\033[2~",                 // kich1 (TB_CAP_INSERT)
    "\033[3~",                 // kdch1 (TB_CAP_DELETE)
    "\033OH",                  // khome (TB_CAP_HOME)
    "\033OF",                  // kend (TB_CAP_END)
    "\033[5~",                 // kpp (TB_CAP_PGUP)
    "\033[6~",                 // knp (TB_CAP_PGDN)
    "\033OA",                  // kcuu1 (TB_CAP_ARROW_UP)
    "\033OB",                  // kcud1 (TB_CAP_ARROW_DOWN)
    "\033OD",                  // kcub1 (TB_CAP_ARROW_LEFT)
    "\033OC",                  // kcuf1 (TB_CAP_ARROW_RIGHT)
    "\033[Z",                  // kcbt (TB_CAP_BACK_TAB)
    "\033[?1049h\033[22;0;0t", // smcup (TB_CAP_ENTER_CA)
    "\033[?1049l\033[23;0;0t", // rmcup (TB_CAP_EXIT_CA)
    "\033[?12l\033[?25h",      // cnorm (TB_CAP_SHOW_CURSOR)
    "\033[?25l",               // civis (TB_CAP_HIDE_CURSOR)
    "\033[H\033[2J",           // clear (TB_CAP_CLEAR_SCREEN)
    "\033(B\033[m",            // sgr0 (TB_CAP_SGR0)
    "\033[4m",                 // smul (TB_CAP_UNDERLINE)
    "\033[1m",                 // bold (TB_CAP_BOLD)
    "\033[5m",                 // blink (TB_CAP_BLINK)
    "\033[3m",                 // sitm (TB_CAP_ITALIC)
    "\033[7m",                 // rev (TB_CAP_REVERSE)
    "\033[?1h\033=",           // smkx (TB_CAP_ENTER_KEYPAD)
    "\033[?1l\033>",           // rmkx (TB_CAP_EXIT_KEYPAD)
    "\033[2m",                 // dim (TB_CAP_DIM)
    "\033[8m",                 // invis (TB_CAP_INVISIBLE)
};

// linux
static const char *linux_caps[] = {
    "\033[[A",           // kf1 (TB_CAP_F1)
    "\033[[B",           // kf2 (TB_CAP_F2)
    "\033[[C",           // kf3 (TB_CAP_F3)
    "\033[[D",           // kf4 (TB_CAP_F4)
    "\033[[E",           // kf5 (TB_CAP_F5)
    "\033[17~",          // kf6 (TB_CAP_F6)
    "\033[18~",          // kf7 (TB_CAP_F7)
    "\033[19~",          // kf8 (TB_CAP_F8)
    "\033[20~",          // kf9 (TB_CAP_F9)
    "\033[21~",          // kf10 (TB_CAP_F10)
    "\033[23~",          // kf11 (TB_CAP_F11)
    "\033[24~",          // kf12 (TB_CAP_F12)
    "\033[2~",           // kich1 (TB_CAP_INSERT)
    "\033[3~",           // kdch1 (TB_CAP_DELETE)
    "\033[1~",           // khome (TB_CAP_HOME)
    "\033[4~",           // kend (TB_CAP_END)
    "\033[5~",           // kpp (TB_CAP_PGUP)
    "\033[6~",           // knp (TB_CAP_PGDN)
    "\033[A",            // kcuu1 (TB_CAP_ARROW_UP)
    "\033[B",            // kcud1 (TB_CAP_ARROW_DOWN)
    "\033[D",            // kcub1 (TB_CAP_ARROW_LEFT)
    "\033[C",            // kcuf1 (TB_CAP_ARROW_RIGHT)
    "\033\011",          // kcbt (TB_CAP_BACK_TAB)
    "",                  // smcup (TB_CAP_ENTER_CA)
    "",                  // rmcup (TB_CAP_EXIT_CA)
    "\033[?25h\033[?0c", // cnorm (TB_CAP_SHOW_CURSOR)
    "\033[?25l\033[?1c", // civis (TB_CAP_HIDE_CURSOR)
    "\033[H\033[J",      // clear (TB_CAP_CLEAR_SCREEN)
    "\033[m\017",        // sgr0 (TB_CAP_SGR0)
    "\033[4m",           // smul (TB_CAP_UNDERLINE)
    "\033[1m",           // bold (TB_CAP_BOLD)
    "\033[5m",           // blink (TB_CAP_BLINK)
    "",                  // sitm (TB_CAP_ITALIC)
    "\033[7m",           // rev (TB_CAP_REVERSE)
    "",                  // smkx (TB_CAP_ENTER_KEYPAD)
    "",                  // rmkx (TB_CAP_EXIT_KEYPAD)
    "\033[2m",           // dim (TB_CAP_DIM)
    "",                  // invis (TB_CAP_INVISIBLE)
};

// screen
static const char *screen_caps[] = {
    "\033OP",            // kf1 (TB_CAP_F1)
    "\033OQ",            // kf2 (TB_CAP_F2)
    "\033OR",            // kf3 (TB_CAP_F3)
    "\033OS",            // kf4 (TB_CAP_F4)
    "\033[15~",          // kf5 (TB_CAP_F5)
    "\033[17~",          // kf6 (TB_CAP_F6)
    "\033[18~",          // kf7 (TB_CAP_F7)
    "\033[19~",          // kf8 (TB_CAP_F8)
    "\033[20~",          // kf9 (TB_CAP_F9)
    "\033[21~",          // kf10 (TB_CAP_F10)
    "\033[23~",          // kf11 (TB_CAP_F11)
    "\033[24~",          // kf12 (TB_CAP_F12)
    "\033[2~",           // kich1 (TB_CAP_INSERT)
    "\033[3~",           // kdch1 (TB_CAP_DELETE)
    "\033[1~",           // khome (TB_CAP_HOME)
    "\033[4~",           // kend (TB_CAP_END)
    "\033[5~",           // kpp (TB_CAP_PGUP)
    "\033[6~",           // knp (TB_CAP_PGDN)
    "\033OA",            // kcuu1 (TB_CAP_ARROW_UP)
    "\033OB",            // kcud1 (TB_CAP_ARROW_DOWN)
    "\033OD",            // kcub1 (TB_CAP_ARROW_LEFT)
    "\033OC",            // kcuf1 (TB_CAP_ARROW_RIGHT)
    "\033[Z",            // kcbt (TB_CAP_BACK_TAB)
    "\033[?1049h",       // smcup (TB_CAP_ENTER_CA)
    "\033[?1049l",       // rmcup (TB_CAP_EXIT_CA)
    "\033[34h\033[?25h", // cnorm (TB_CAP_SHOW_CURSOR)
    "\033[?25l",         // civis (TB_CAP_HIDE_CURSOR)
    "\033[H\033[J",      // clear (TB_CAP_CLEAR_SCREEN)
    "\033[m\017",        // sgr0 (TB_CAP_SGR0)
    "\033[4m",           // smul (TB_CAP_UNDERLINE)
    "\033[1m",           // bold (TB_CAP_BOLD)
    "\033[5m",           // blink (TB_CAP_BLINK)
    "",                  // sitm (TB_CAP_ITALIC)
    "\033[7m",           // rev (TB_CAP_REVERSE)
    "\033[?1h\033=",     // smkx (TB_CAP_ENTER_KEYPAD)
    "\033[?1l\033>",     // rmkx (TB_CAP_EXIT_KEYPAD)
    "\033[2m",           // dim (TB_CAP_DIM)
    "",                  // invis (TB_CAP_INVISIBLE)
};

// rxvt-256color
static const char *rxvt_256color_caps[] = {
    "\033[11~",              // kf1 (TB_CAP_F1)
    "\033[12~",              // kf2 (TB_CAP_F2)
    "\033[13~",              // kf3 (TB_CAP_F3)
    "\033[14~",              // kf4 (TB_CAP_F4)
    "\033[15~",              // kf5 (TB_CAP_F5)
    "\033[17~",              // kf6 (TB_CAP_F6)
    "\033[18~",              // kf7 (TB_CAP_F7)
    "\033[19~",              // kf8 (TB_CAP_F8)
    "\033[20~",              // kf9 (TB_CAP_F9)
    "\033[21~",              // kf10 (TB_CAP_F10)
    "\033[23~",              // kf11 (TB_CAP_F11)
    "\033[24~",              // kf12 (TB_CAP_F12)
    "\033[2~",               // kich1 (TB_CAP_INSERT)
    "\033[3~",               // kdch1 (TB_CAP_DELETE)
    "\033[7~",               // khome (TB_CAP_HOME)
    "\033[8~",               // kend (TB_CAP_END)
    "\033[5~",               // kpp (TB_CAP_PGUP)
    "\033[6~",               // knp (TB_CAP_PGDN)
    "\033[A",                // kcuu1 (TB_CAP_ARROW_UP)
    "\033[B",                // kcud1 (TB_CAP_ARROW_DOWN)
    "\033[D",                // kcub1 (TB_CAP_ARROW_LEFT)
    "\033[C",                // kcuf1 (TB_CAP_ARROW_RIGHT)
    "\033[Z",                // kcbt (TB_CAP_BACK_TAB)
    "\0337\033[?47h",        // smcup (TB_CAP_ENTER_CA)
    "\033[2J\033[?47l\0338", // rmcup (TB_CAP_EXIT_CA)
    "\033[?25h",             // cnorm (TB_CAP_SHOW_CURSOR)
    "\033[?25l",             // civis (TB_CAP_HIDE_CURSOR)
    "\033[H\033[2J",         // clear (TB_CAP_CLEAR_SCREEN)
    "\033[m\017",            // sgr0 (TB_CAP_SGR0)
    "\033[4m",               // smul (TB_CAP_UNDERLINE)
    "\033[1m",               // bold (TB_CAP_BOLD)
    "\033[5m",               // blink (TB_CAP_BLINK)
    "",                      // sitm (TB_CAP_ITALIC)
    "\033[7m",               // rev (TB_CAP_REVERSE)
    "\033=",                 // smkx (TB_CAP_ENTER_KEYPAD)
    "\033>",                 // rmkx (TB_CAP_EXIT_KEYPAD)
    "",                      // dim (TB_CAP_DIM)
    "",                      // invis (TB_CAP_INVISIBLE)
};

// rxvt-unicode
static const char *rxvt_unicode_caps[] = {
    "\033[11~",           // kf1 (TB_CAP_F1)
    "\033[12~",           // kf2 (TB_CAP_F2)
    "\033[13~",           // kf3 (TB_CAP_F3)
    "\033[14~",           // kf4 (TB_CAP_F4)
    "\033[15~",           // kf5 (TB_CAP_F5)
    "\033[17~",           // kf6 (TB_CAP_F6)
    "\033[18~",           // kf7 (TB_CAP_F7)
    "\033[19~",           // kf8 (TB_CAP_F8)
    "\033[20~",           // kf9 (TB_CAP_F9)
    "\033[21~",           // kf10 (TB_CAP_F10)
    "\033[23~",           // kf11 (TB_CAP_F11)
    "\033[24~",           // kf12 (TB_CAP_F12)
    "\033[2~",            // kich1 (TB_CAP_INSERT)
    "\033[3~",            // kdch1 (TB_CAP_DELETE)
    "\033[7~",            // khome (TB_CAP_HOME)
    "\033[8~",            // kend (TB_CAP_END)
    "\033[5~",            // kpp (TB_CAP_PGUP)
    "\033[6~",            // knp (TB_CAP_PGDN)
    "\033[A",             // kcuu1 (TB_CAP_ARROW_UP)
    "\033[B",             // kcud1 (TB_CAP_ARROW_DOWN)
    "\033[D",             // kcub1 (TB_CAP_ARROW_LEFT)
    "\033[C",             // kcuf1 (TB_CAP_ARROW_RIGHT)
    "\033[Z",             // kcbt (TB_CAP_BACK_TAB)
    "\033[?1049h",        // smcup (TB_CAP_ENTER_CA)
    "\033[r\033[?1049l",  // rmcup (TB_CAP_EXIT_CA)
    "\033[?12l\033[?25h", // cnorm (TB_CAP_SHOW_CURSOR)
    "\033[?25l",          // civis (TB_CAP_HIDE_CURSOR)
    "\033[H\033[2J",      // clear (TB_CAP_CLEAR_SCREEN)
    "\033[m\033(B",       // sgr0 (TB_CAP_SGR0)
    "\033[4m",            // smul (TB_CAP_UNDERLINE)
    "\033[1m",            // bold (TB_CAP_BOLD)
    "\033[5m",            // blink (TB_CAP_BLINK)
    "\033[3m",            // sitm (TB_CAP_ITALIC)
    "\033[7m",            // rev (TB_CAP_REVERSE)
    "\033=",              // smkx (TB_CAP_ENTER_KEYPAD)
    "\033>",              // rmkx (TB_CAP_EXIT_KEYPAD)
    "",                   // dim (TB_CAP_DIM)
    "",                   // invis (TB_CAP_INVISIBLE)
};

// Eterm
static const char *eterm_caps[] = {
    "\033[11~",              // kf1 (TB_CAP_F1)
    "\033[12~",              // kf2 (TB_CAP_F2)
    "\033[13~",              // kf3 (TB_CAP_F3)
    "\033[14~",              // kf4 (TB_CAP_F4)
    "\033[15~",              // kf5 (TB_CAP_F5)
    "\033[17~",              // kf6 (TB_CAP_F6)
    "\033[18~",              // kf7 (TB_CAP_F7)
    "\033[19~",              // kf8 (TB_CAP_F8)
    "\033[20~",              // kf9 (TB_CAP_F9)
    "\033[21~",              // kf10 (TB_CAP_F10)
    "\033[23~",              // kf11 (TB_CAP_F11)
    "\033[24~",              // kf12 (TB_CAP_F12)
    "\033[2~",               // kich1 (TB_CAP_INSERT)
    "\033[3~",               // kdch1 (TB_CAP_DELETE)
    "\033[7~",               // khome (TB_CAP_HOME)
    "\033[8~",               // kend (TB_CAP_END)
    "\033[5~",               // kpp (TB_CAP_PGUP)
    "\033[6~",               // knp (TB_CAP_PGDN)
    "\033[A",                // kcuu1 (TB_CAP_ARROW_UP)
    "\033[B",                // kcud1 (TB_CAP_ARROW_DOWN)
    "\033[D",                // kcub1 (TB_CAP_ARROW_LEFT)
    "\033[C",                // kcuf1 (TB_CAP_ARROW_RIGHT)
    "",                      // kcbt (TB_CAP_BACK_TAB)
    "\0337\033[?47h",        // smcup (TB_CAP_ENTER_CA)
    "\033[2J\033[?47l\0338", // rmcup (TB_CAP_EXIT_CA)
    "\033[?25h",             // cnorm (TB_CAP_SHOW_CURSOR)
    "\033[?25l",             // civis (TB_CAP_HIDE_CURSOR)
    "\033[H\033[2J",         // clear (TB_CAP_CLEAR_SCREEN)
    "\033[m\017",            // sgr0 (TB_CAP_SGR0)
    "\033[4m",               // smul (TB_CAP_UNDERLINE)
    "\033[1m",               // bold (TB_CAP_BOLD)
    "\033[5m",               // blink (TB_CAP_BLINK)
    "",                      // sitm (TB_CAP_ITALIC)
    "\033[7m",               // rev (TB_CAP_REVERSE)
    "",                      // smkx (TB_CAP_ENTER_KEYPAD)
    "",                      // rmkx (TB_CAP_EXIT_KEYPAD)
    "",                      // dim (TB_CAP_DIM)
    "",                      // invis (TB_CAP_INVISIBLE)
};

static struct
{
        const char *name;
        const char **caps;
        const char *alias;
}

builtin_terms[] = {
    {"xterm", xterm_caps, ""},
    {"xterm-256color", xterm_caps, ""},
    {"linux", linux_caps, ""},
    {"screen", screen_caps, "tmux"},
    {"rxvt-256color", rxvt_256color_caps, ""},
    {"rxvt-unicode", rxvt_unicode_caps, "rxvt"},
    {"Eterm", eterm_caps, ""},
    {NULL, NULL, NULL},
};

/* END codegen c */

static struct
{
        const char *cap;
        const uint16_t key;
        const uint8_t mod;
}

builtin_mod_caps[] = {
    // xterm arrows
    {"\x1b[1;2A", TB_KEY_ARROW_UP, TB_MOD_SHIFT},
    {"\x1b[1;3A", TB_KEY_ARROW_UP, TB_MOD_ALT},
    {"\x1b[1;4A", TB_KEY_ARROW_UP, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[1;5A", TB_KEY_ARROW_UP, TB_MOD_CTRL},
    {"\x1b[1;6A", TB_KEY_ARROW_UP, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[1;7A", TB_KEY_ARROW_UP, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[1;8A", TB_KEY_ARROW_UP, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[1;2B", TB_KEY_ARROW_DOWN, TB_MOD_SHIFT},
    {"\x1b[1;3B", TB_KEY_ARROW_DOWN, TB_MOD_ALT},
    {"\x1b[1;4B", TB_KEY_ARROW_DOWN, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[1;5B", TB_KEY_ARROW_DOWN, TB_MOD_CTRL},
    {"\x1b[1;6B", TB_KEY_ARROW_DOWN, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[1;7B", TB_KEY_ARROW_DOWN, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[1;8B", TB_KEY_ARROW_DOWN, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[1;2C", TB_KEY_ARROW_RIGHT, TB_MOD_SHIFT},
    {"\x1b[1;3C", TB_KEY_ARROW_RIGHT, TB_MOD_ALT},
    {"\x1b[1;4C", TB_KEY_ARROW_RIGHT, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[1;5C", TB_KEY_ARROW_RIGHT, TB_MOD_CTRL},
    {"\x1b[1;6C", TB_KEY_ARROW_RIGHT, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[1;7C", TB_KEY_ARROW_RIGHT, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[1;8C", TB_KEY_ARROW_RIGHT, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[1;2D", TB_KEY_ARROW_LEFT, TB_MOD_SHIFT},
    {"\x1b[1;3D", TB_KEY_ARROW_LEFT, TB_MOD_ALT},
    {"\x1b[1;4D", TB_KEY_ARROW_LEFT, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[1;5D", TB_KEY_ARROW_LEFT, TB_MOD_CTRL},
    {"\x1b[1;6D", TB_KEY_ARROW_LEFT, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[1;7D", TB_KEY_ARROW_LEFT, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[1;8D", TB_KEY_ARROW_LEFT, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    // xterm keys
    {"\x1b[1;2H", TB_KEY_HOME, TB_MOD_SHIFT},
    {"\x1b[1;3H", TB_KEY_HOME, TB_MOD_ALT},
    {"\x1b[1;4H", TB_KEY_HOME, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[1;5H", TB_KEY_HOME, TB_MOD_CTRL},
    {"\x1b[1;6H", TB_KEY_HOME, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[1;7H", TB_KEY_HOME, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[1;8H", TB_KEY_HOME, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[1;2F", TB_KEY_END, TB_MOD_SHIFT},
    {"\x1b[1;3F", TB_KEY_END, TB_MOD_ALT},
    {"\x1b[1;4F", TB_KEY_END, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[1;5F", TB_KEY_END, TB_MOD_CTRL},
    {"\x1b[1;6F", TB_KEY_END, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[1;7F", TB_KEY_END, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[1;8F", TB_KEY_END, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[2;2~", TB_KEY_INSERT, TB_MOD_SHIFT},
    {"\x1b[2;3~", TB_KEY_INSERT, TB_MOD_ALT},
    {"\x1b[2;4~", TB_KEY_INSERT, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[2;5~", TB_KEY_INSERT, TB_MOD_CTRL},
    {"\x1b[2;6~", TB_KEY_INSERT, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[2;7~", TB_KEY_INSERT, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[2;8~", TB_KEY_INSERT, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[3;2~", TB_KEY_DELETE, TB_MOD_SHIFT},
    {"\x1b[3;3~", TB_KEY_DELETE, TB_MOD_ALT},
    {"\x1b[3;4~", TB_KEY_DELETE, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[3;5~", TB_KEY_DELETE, TB_MOD_CTRL},
    {"\x1b[3;6~", TB_KEY_DELETE, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[3;7~", TB_KEY_DELETE, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[3;8~", TB_KEY_DELETE, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[5;2~", TB_KEY_PGUP, TB_MOD_SHIFT},
    {"\x1b[5;3~", TB_KEY_PGUP, TB_MOD_ALT},
    {"\x1b[5;4~", TB_KEY_PGUP, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[5;5~", TB_KEY_PGUP, TB_MOD_CTRL},
    {"\x1b[5;6~", TB_KEY_PGUP, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[5;7~", TB_KEY_PGUP, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[5;8~", TB_KEY_PGUP, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[6;2~", TB_KEY_PGDN, TB_MOD_SHIFT},
    {"\x1b[6;3~", TB_KEY_PGDN, TB_MOD_ALT},
    {"\x1b[6;4~", TB_KEY_PGDN, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[6;5~", TB_KEY_PGDN, TB_MOD_CTRL},
    {"\x1b[6;6~", TB_KEY_PGDN, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[6;7~", TB_KEY_PGDN, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[6;8~", TB_KEY_PGDN, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[1;2P", TB_KEY_F1, TB_MOD_SHIFT},
    {"\x1b[1;3P", TB_KEY_F1, TB_MOD_ALT},
    {"\x1b[1;4P", TB_KEY_F1, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[1;5P", TB_KEY_F1, TB_MOD_CTRL},
    {"\x1b[1;6P", TB_KEY_F1, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[1;7P", TB_KEY_F1, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[1;8P", TB_KEY_F1, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[1;2Q", TB_KEY_F2, TB_MOD_SHIFT},
    {"\x1b[1;3Q", TB_KEY_F2, TB_MOD_ALT},
    {"\x1b[1;4Q", TB_KEY_F2, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[1;5Q", TB_KEY_F2, TB_MOD_CTRL},
    {"\x1b[1;6Q", TB_KEY_F2, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[1;7Q", TB_KEY_F2, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[1;8Q", TB_KEY_F2, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[1;2R", TB_KEY_F3, TB_MOD_SHIFT},
    {"\x1b[1;3R", TB_KEY_F3, TB_MOD_ALT},
    {"\x1b[1;4R", TB_KEY_F3, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[1;5R", TB_KEY_F3, TB_MOD_CTRL},
    {"\x1b[1;6R", TB_KEY_F3, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[1;7R", TB_KEY_F3, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[1;8R", TB_KEY_F3, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[1;2S", TB_KEY_F4, TB_MOD_SHIFT},
    {"\x1b[1;3S", TB_KEY_F4, TB_MOD_ALT},
    {"\x1b[1;4S", TB_KEY_F4, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[1;5S", TB_KEY_F4, TB_MOD_CTRL},
    {"\x1b[1;6S", TB_KEY_F4, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[1;7S", TB_KEY_F4, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[1;8S", TB_KEY_F4, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[15;2~", TB_KEY_F5, TB_MOD_SHIFT},
    {"\x1b[15;3~", TB_KEY_F5, TB_MOD_ALT},
    {"\x1b[15;4~", TB_KEY_F5, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[15;5~", TB_KEY_F5, TB_MOD_CTRL},
    {"\x1b[15;6~", TB_KEY_F5, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[15;7~", TB_KEY_F5, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[15;8~", TB_KEY_F5, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[17;2~", TB_KEY_F6, TB_MOD_SHIFT},
    {"\x1b[17;3~", TB_KEY_F6, TB_MOD_ALT},
    {"\x1b[17;4~", TB_KEY_F6, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[17;5~", TB_KEY_F6, TB_MOD_CTRL},
    {"\x1b[17;6~", TB_KEY_F6, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[17;7~", TB_KEY_F6, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[17;8~", TB_KEY_F6, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[18;2~", TB_KEY_F7, TB_MOD_SHIFT},
    {"\x1b[18;3~", TB_KEY_F7, TB_MOD_ALT},
    {"\x1b[18;4~", TB_KEY_F7, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[18;5~", TB_KEY_F7, TB_MOD_CTRL},
    {"\x1b[18;6~", TB_KEY_F7, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[18;7~", TB_KEY_F7, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[18;8~", TB_KEY_F7, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[19;2~", TB_KEY_F8, TB_MOD_SHIFT},
    {"\x1b[19;3~", TB_KEY_F8, TB_MOD_ALT},
    {"\x1b[19;4~", TB_KEY_F8, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[19;5~", TB_KEY_F8, TB_MOD_CTRL},
    {"\x1b[19;6~", TB_KEY_F8, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[19;7~", TB_KEY_F8, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[19;8~", TB_KEY_F8, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[20;2~", TB_KEY_F9, TB_MOD_SHIFT},
    {"\x1b[20;3~", TB_KEY_F9, TB_MOD_ALT},
    {"\x1b[20;4~", TB_KEY_F9, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[20;5~", TB_KEY_F9, TB_MOD_CTRL},
    {"\x1b[20;6~", TB_KEY_F9, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[20;7~", TB_KEY_F9, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[20;8~", TB_KEY_F9, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[21;2~", TB_KEY_F10, TB_MOD_SHIFT},
    {"\x1b[21;3~", TB_KEY_F10, TB_MOD_ALT},
    {"\x1b[21;4~", TB_KEY_F10, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[21;5~", TB_KEY_F10, TB_MOD_CTRL},
    {"\x1b[21;6~", TB_KEY_F10, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[21;7~", TB_KEY_F10, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[21;8~", TB_KEY_F10, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[23;2~", TB_KEY_F11, TB_MOD_SHIFT},
    {"\x1b[23;3~", TB_KEY_F11, TB_MOD_ALT},
    {"\x1b[23;4~", TB_KEY_F11, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[23;5~", TB_KEY_F11, TB_MOD_CTRL},
    {"\x1b[23;6~", TB_KEY_F11, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[23;7~", TB_KEY_F11, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[23;8~", TB_KEY_F11, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b[24;2~", TB_KEY_F12, TB_MOD_SHIFT},
    {"\x1b[24;3~", TB_KEY_F12, TB_MOD_ALT},
    {"\x1b[24;4~", TB_KEY_F12, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[24;5~", TB_KEY_F12, TB_MOD_CTRL},
    {"\x1b[24;6~", TB_KEY_F12, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[24;7~", TB_KEY_F12, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b[24;8~", TB_KEY_F12, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    // rxvt arrows
    {"\x1b[a", TB_KEY_ARROW_UP, TB_MOD_SHIFT},
    {"\x1b\x1b[A", TB_KEY_ARROW_UP, TB_MOD_ALT},
    {"\x1b\x1b[a", TB_KEY_ARROW_UP, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1bOa", TB_KEY_ARROW_UP, TB_MOD_CTRL},
    {"\x1b\x1bOa", TB_KEY_ARROW_UP, TB_MOD_CTRL | TB_MOD_ALT},

    {"\x1b[b", TB_KEY_ARROW_DOWN, TB_MOD_SHIFT},
    {"\x1b\x1b[B", TB_KEY_ARROW_DOWN, TB_MOD_ALT},
    {"\x1b\x1b[b", TB_KEY_ARROW_DOWN, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1bOb", TB_KEY_ARROW_DOWN, TB_MOD_CTRL},
    {"\x1b\x1bOb", TB_KEY_ARROW_DOWN, TB_MOD_CTRL | TB_MOD_ALT},

    {"\x1b[c", TB_KEY_ARROW_RIGHT, TB_MOD_SHIFT},
    {"\x1b\x1b[C", TB_KEY_ARROW_RIGHT, TB_MOD_ALT},
    {"\x1b\x1b[c", TB_KEY_ARROW_RIGHT, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1bOc", TB_KEY_ARROW_RIGHT, TB_MOD_CTRL},
    {"\x1b\x1bOc", TB_KEY_ARROW_RIGHT, TB_MOD_CTRL | TB_MOD_ALT},

    {"\x1b[d", TB_KEY_ARROW_LEFT, TB_MOD_SHIFT},
    {"\x1b\x1b[D", TB_KEY_ARROW_LEFT, TB_MOD_ALT},
    {"\x1b\x1b[d", TB_KEY_ARROW_LEFT, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1bOd", TB_KEY_ARROW_LEFT, TB_MOD_CTRL},
    {"\x1b\x1bOd", TB_KEY_ARROW_LEFT, TB_MOD_CTRL | TB_MOD_ALT},

    // rxvt keys
    {"\x1b[7$", TB_KEY_HOME, TB_MOD_SHIFT},
    {"\x1b\x1b[7~", TB_KEY_HOME, TB_MOD_ALT},
    {"\x1b\x1b[7$", TB_KEY_HOME, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[7^", TB_KEY_HOME, TB_MOD_CTRL},
    {"\x1b[7@", TB_KEY_HOME, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b\x1b[7^", TB_KEY_HOME, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[7@", TB_KEY_HOME, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},

    {"\x1b\x1b[8~", TB_KEY_END, TB_MOD_ALT},
    {"\x1b\x1b[8$", TB_KEY_END, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[8^", TB_KEY_END, TB_MOD_CTRL},
    {"\x1b\x1b[8^", TB_KEY_END, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[8@", TB_KEY_END, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[8@", TB_KEY_END, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[8$", TB_KEY_END, TB_MOD_SHIFT},

    {"\x1b\x1b[2~", TB_KEY_INSERT, TB_MOD_ALT},
    {"\x1b\x1b[2$", TB_KEY_INSERT, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[2^", TB_KEY_INSERT, TB_MOD_CTRL},
    {"\x1b\x1b[2^", TB_KEY_INSERT, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[2@", TB_KEY_INSERT, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[2@", TB_KEY_INSERT, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[2$", TB_KEY_INSERT, TB_MOD_SHIFT},

    {"\x1b\x1b[3~", TB_KEY_DELETE, TB_MOD_ALT},
    {"\x1b\x1b[3$", TB_KEY_DELETE, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[3^", TB_KEY_DELETE, TB_MOD_CTRL},
    {"\x1b\x1b[3^", TB_KEY_DELETE, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[3@", TB_KEY_DELETE, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[3@", TB_KEY_DELETE, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[3$", TB_KEY_DELETE, TB_MOD_SHIFT},

    {"\x1b\x1b[5~", TB_KEY_PGUP, TB_MOD_ALT},
    {"\x1b\x1b[5$", TB_KEY_PGUP, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[5^", TB_KEY_PGUP, TB_MOD_CTRL},
    {"\x1b\x1b[5^", TB_KEY_PGUP, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[5@", TB_KEY_PGUP, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[5@", TB_KEY_PGUP, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[5$", TB_KEY_PGUP, TB_MOD_SHIFT},

    {"\x1b\x1b[6~", TB_KEY_PGDN, TB_MOD_ALT},
    {"\x1b\x1b[6$", TB_KEY_PGDN, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[6^", TB_KEY_PGDN, TB_MOD_CTRL},
    {"\x1b\x1b[6^", TB_KEY_PGDN, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[6@", TB_KEY_PGDN, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[6@", TB_KEY_PGDN, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[6$", TB_KEY_PGDN, TB_MOD_SHIFT},

    {"\x1b\x1b[11~", TB_KEY_F1, TB_MOD_ALT},
    {"\x1b\x1b[23~", TB_KEY_F1, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[11^", TB_KEY_F1, TB_MOD_CTRL},
    {"\x1b\x1b[11^", TB_KEY_F1, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[23^", TB_KEY_F1, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[23^", TB_KEY_F1, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[23~", TB_KEY_F1, TB_MOD_SHIFT},

    {"\x1b\x1b[12~", TB_KEY_F2, TB_MOD_ALT},
    {"\x1b\x1b[24~", TB_KEY_F2, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[12^", TB_KEY_F2, TB_MOD_CTRL},
    {"\x1b\x1b[12^", TB_KEY_F2, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[24^", TB_KEY_F2, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[24^", TB_KEY_F2, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[24~", TB_KEY_F2, TB_MOD_SHIFT},

    {"\x1b\x1b[13~", TB_KEY_F3, TB_MOD_ALT},
    {"\x1b\x1b[25~", TB_KEY_F3, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[13^", TB_KEY_F3, TB_MOD_CTRL},
    {"\x1b\x1b[13^", TB_KEY_F3, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[25^", TB_KEY_F3, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[25^", TB_KEY_F3, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[25~", TB_KEY_F3, TB_MOD_SHIFT},

    {"\x1b\x1b[14~", TB_KEY_F4, TB_MOD_ALT},
    {"\x1b\x1b[26~", TB_KEY_F4, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[14^", TB_KEY_F4, TB_MOD_CTRL},
    {"\x1b\x1b[14^", TB_KEY_F4, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[26^", TB_KEY_F4, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[26^", TB_KEY_F4, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[26~", TB_KEY_F4, TB_MOD_SHIFT},

    {"\x1b\x1b[15~", TB_KEY_F5, TB_MOD_ALT},
    {"\x1b\x1b[28~", TB_KEY_F5, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[15^", TB_KEY_F5, TB_MOD_CTRL},
    {"\x1b\x1b[15^", TB_KEY_F5, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[28^", TB_KEY_F5, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[28^", TB_KEY_F5, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[28~", TB_KEY_F5, TB_MOD_SHIFT},

    {"\x1b\x1b[17~", TB_KEY_F6, TB_MOD_ALT},
    {"\x1b\x1b[29~", TB_KEY_F6, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[17^", TB_KEY_F6, TB_MOD_CTRL},
    {"\x1b\x1b[17^", TB_KEY_F6, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[29^", TB_KEY_F6, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[29^", TB_KEY_F6, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[29~", TB_KEY_F6, TB_MOD_SHIFT},

    {"\x1b\x1b[18~", TB_KEY_F7, TB_MOD_ALT},
    {"\x1b\x1b[31~", TB_KEY_F7, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[18^", TB_KEY_F7, TB_MOD_CTRL},
    {"\x1b\x1b[18^", TB_KEY_F7, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[31^", TB_KEY_F7, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[31^", TB_KEY_F7, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[31~", TB_KEY_F7, TB_MOD_SHIFT},

    {"\x1b\x1b[19~", TB_KEY_F8, TB_MOD_ALT},
    {"\x1b\x1b[32~", TB_KEY_F8, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[19^", TB_KEY_F8, TB_MOD_CTRL},
    {"\x1b\x1b[19^", TB_KEY_F8, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[32^", TB_KEY_F8, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[32^", TB_KEY_F8, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[32~", TB_KEY_F8, TB_MOD_SHIFT},

    {"\x1b\x1b[20~", TB_KEY_F9, TB_MOD_ALT},
    {"\x1b\x1b[33~", TB_KEY_F9, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[20^", TB_KEY_F9, TB_MOD_CTRL},
    {"\x1b\x1b[20^", TB_KEY_F9, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[33^", TB_KEY_F9, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[33^", TB_KEY_F9, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[33~", TB_KEY_F9, TB_MOD_SHIFT},

    {"\x1b\x1b[21~", TB_KEY_F10, TB_MOD_ALT},
    {"\x1b\x1b[34~", TB_KEY_F10, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[21^", TB_KEY_F10, TB_MOD_CTRL},
    {"\x1b\x1b[21^", TB_KEY_F10, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[34^", TB_KEY_F10, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[34^", TB_KEY_F10, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[34~", TB_KEY_F10, TB_MOD_SHIFT},

    {"\x1b\x1b[23~", TB_KEY_F11, TB_MOD_ALT},
    {"\x1b\x1b[23$", TB_KEY_F11, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[23^", TB_KEY_F11, TB_MOD_CTRL},
    {"\x1b\x1b[23^", TB_KEY_F11, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[23@", TB_KEY_F11, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[23@", TB_KEY_F11, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[23$", TB_KEY_F11, TB_MOD_SHIFT},

    {"\x1b\x1b[24~", TB_KEY_F12, TB_MOD_ALT},
    {"\x1b\x1b[24$", TB_KEY_F12, TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[24^", TB_KEY_F12, TB_MOD_CTRL},
    {"\x1b\x1b[24^", TB_KEY_F12, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1b\x1b[24@", TB_KEY_F12, TB_MOD_CTRL | TB_MOD_ALT | TB_MOD_SHIFT},
    {"\x1b[24@", TB_KEY_F12, TB_MOD_CTRL | TB_MOD_SHIFT},
    {"\x1b[24$", TB_KEY_F12, TB_MOD_SHIFT},

    // linux console/putty arrows
    {"\x1b[A", TB_KEY_ARROW_UP, TB_MOD_SHIFT},
    {"\x1b[B", TB_KEY_ARROW_DOWN, TB_MOD_SHIFT},
    {"\x1b[C", TB_KEY_ARROW_RIGHT, TB_MOD_SHIFT},
    {"\x1b[D", TB_KEY_ARROW_LEFT, TB_MOD_SHIFT},

    // more putty arrows
    {"\x1bOA", TB_KEY_ARROW_UP, TB_MOD_CTRL},
    {"\x1b\x1bOA", TB_KEY_ARROW_UP, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1bOB", TB_KEY_ARROW_DOWN, TB_MOD_CTRL},
    {"\x1b\x1bOB", TB_KEY_ARROW_DOWN, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1bOC", TB_KEY_ARROW_RIGHT, TB_MOD_CTRL},
    {"\x1b\x1bOC", TB_KEY_ARROW_RIGHT, TB_MOD_CTRL | TB_MOD_ALT},
    {"\x1bOD", TB_KEY_ARROW_LEFT, TB_MOD_CTRL},
    {"\x1b\x1bOD", TB_KEY_ARROW_LEFT, TB_MOD_CTRL | TB_MOD_ALT},

    {NULL, 0, 0},
};

static const unsigned char utf8_length[256] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                                               1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                                               1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                                               1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                                               1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                                               1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                                               1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                                               1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                                               1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
                                               2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
                                               3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 1, 1};

static const unsigned char utf8_mask[6] = {0x7f, 0x1f, 0x0f, 0x07, 0x03, 0x01};

static int tb_reset(void);
static int init_term_caps(void);
static int cap_trie_add(const char *cap, uint16_t key, uint8_t mod);
static int cap_trie_find(const char *buf, size_t nbuf, struct cap_trie_t **last,
                         size_t *depth);
static int cap_trie_deinit(struct cap_trie_t *node);
static int parse_terminfo_caps(void);

static int tb_deinit(void);
static int wait_event(struct tb_event *event, int timeout);
static int extract_event(struct tb_event *event);
static int extract_esc(struct tb_event *event);
static int extract_esc_user(struct tb_event *event, int is_post);
static int load_builtin_caps(void);
static int init_cap_trie(void);
static int update_term_size(void);
#ifndef _WIN32
static int update_term_size_via_esc(void);
#endif
static int extract_esc_mouse(struct tb_event *event);
static int load_terminfo(void);
static int load_terminfo_from_path(const char *path, const char *term);
static int read_terminfo_path(const char *path);
static int cell_free(struct tb_cell *cell);
static int cellbuf_free(struct cellbuf_t *c);
static int bytebuf_puts(struct bytebuf_t *b, const char *str);
static int bytebuf_nputs(struct bytebuf_t *b, const char *str, size_t nstr);
static int bytebuf_shift(struct bytebuf_t *b, size_t n);
static int bytebuf_flush(struct bytebuf_t *b);
static int bytebuf_reserve(struct bytebuf_t *b, size_t sz);
static int bytebuf_free(struct bytebuf_t *b);
static const char *get_terminfo_string(int16_t str_offsets_pos,
                                       int16_t str_offsets_len, int16_t str_table_pos, int16_t str_table_len,
                                       int16_t str_index);

int tb_init(void)
{
        return tb_init_file("/dev/tty");
}

#ifdef _WIN32

int tb_init_file(const char *path)
{
        (void)path;

        if (global.initialized)
                return TB_ERR_INIT_ALREADY;

        HANDLE hIn = GetStdHandle(STD_INPUT_HANDLE);
        HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);

        if (hIn == INVALID_HANDLE_VALUE || hOut == INVALID_HANDLE_VALUE) {
                global.last_errno = GetLastError();
                return TB_ERR_INIT_OPEN;
        }

        DWORD mode;
        if (!GetConsoleMode(hIn, &mode)) {
                global.last_errno = GetLastError();
                return TB_ERR_INIT_OPEN;
        }

        global.hin = hIn;
        global.hout = hOut;

        global.ttyfd = -1;
        global.rfd = -1;
        global.wfd = -1;

        global.ttyfd_open = 0;
        global.input_mode &= TB_INPUT_ESC;

        int rv;

        do {
                if_err_break(rv, init_term_caps());
                if_err_break(rv, init_cap_trie());
                if_err_break(rv, update_term_size());

                global.initialized = 1;
        } while (0);

        if (rv != TB_OK) {
                tb_deinit();
        }

        return rv;
}

#else

int tb_init_file(const char *path)
{
        if (global.initialized)
                return TB_ERR_INIT_ALREADY;

        int ttyfd = open(path, O_RDWR);
        if (ttyfd < 0) {
                // Fallback: use stdin/stdout if /dev/tty fails
                ttyfd = STDIN_FILENO;
                if (!isatty(ttyfd)) {
                        global.last_errno = errno;
                        return TB_ERR_INIT_OPEN;
                }
                global.ttyfd_open = 0; // we didn’t open a new fd
        } else {
                global.ttyfd_open = 1;
        }

        global.input_mode &= TB_INPUT_ESC;

        return tb_init_fd(ttyfd);
}

#endif

int tb_shutdown(void)
{
        if_not_init_return();
        tb_deinit();
        return TB_OK;
}

int tb_init_fd(int ttyfd)
{
        return tb_init_rwfd(ttyfd, ttyfd);
}

int tb_init_rwfd(int rfd, int wfd)
{
        int rv;

        tb_reset();

#ifdef _WIN32
        (void)rfd;
        (void)wfd;

        HANDLE hin = GetStdHandle(STD_INPUT_HANDLE);
        HANDLE hout = GetStdHandle(STD_OUTPUT_HANDLE);

        if (hin == INVALID_HANDLE_VALUE || hout == INVALID_HANDLE_VALUE) {
                global.last_errno = GetLastError();
                return TB_ERR_INIT_OPEN;
        }

        // Verify it's a real console (not redirected pipe/file)
        DWORD mode;
        if (!GetConsoleMode(hin, &mode)) {
                global.last_errno = GetLastError();
                return TB_ERR_INIT_OPEN;
        }

        global.hin = hin;
        global.hout = hout;
        global.ttyfd = -1; // IMPORTANT: disable fd-based path
        global.rfd = -1;
        global.wfd = -1;

#else
        global.ttyfd = rfd == wfd && isatty(rfd) ? rfd : -1;
        global.rfd = rfd;
        global.wfd = wfd;
#endif

        do {
                if_err_break(rv, init_term_caps());
                if_err_break(rv, init_cap_trie());
                if_err_break(rv, update_term_size());

                global.initialized = 1;

        } while (0);

        if (rv != TB_OK) {
                tb_deinit();
        }

        return rv;
}

int tb_get_input_fd(void)
{
        return global.rfd;
}

int tb_get_output_fd(void)
{
        return global.wfd;
}

static int load_builtin_caps(void)
{
        int i, j;
        const char *term = getenv("TERM");

#ifdef _WIN32
        if (!term) {
                term = "xterm-256color";
        }
#else
        if (!term) {
                return TB_ERR_NO_TERM;
        }
#endif

        // Check for exact TERM match
        for (i = 0; builtin_terms[i].name != NULL; i++) {
                if (strcmp(term, builtin_terms[i].name) == 0) {
                        for (j = 0; j < TB_CAP__COUNT; j++) {
                                global.caps[j] = builtin_terms[i].caps[j];
                        }
                        return TB_OK;
                }
        }

        // Check for partial TERM or alias match
        for (i = 0; builtin_terms[i].name != NULL; i++) {
                if (strstr(term, builtin_terms[i].name) != NULL ||
                    (*(builtin_terms[i].alias) != '\0' &&
                     strstr(term, builtin_terms[i].alias) != NULL)) {
                        for (j = 0; j < TB_CAP__COUNT; j++) {
                                global.caps[j] = builtin_terms[i].caps[j];
                        }
                        return TB_OK;
                }
        }

        return TB_ERR_UNSUPPORTED_TERM;
}

static int tb_deinit(void)
{
        // Remove all cursor / screen reset / mouse / SGR codes
        // Remove SIGWINCH handler

        // Free the data buffers
        cellbuf_free(&global.back);
        cellbuf_free(&global.front);
        bytebuf_free(&global.in);
        bytebuf_free(&global.out);

        if (global.terminfo)
                tb_free(global.terminfo);

        cap_trie_deinit(&global.cap_trie);

        tb_reset(); // reset global struct
        return TB_OK;
}

int tb_set_input_mode(int mode)
{
        if (!global.initialized)
                return -1;
        if (mode == TB_INPUT_CURRENT)
                return global.input_mode;
        global.input_mode = mode;
        return 0;
}

int tb_peek_event(struct tb_event *event, int timeout_ms)
{
        if (!global.initialized)
                return TB_ERR_NOT_INIT;
        return wait_event(event, timeout_ms);
}

int tb_poll_event(struct tb_event *event)
{
        if (!global.initialized)
                return TB_ERR_NOT_INIT;
        return wait_event(event, -1);
}

static int tb_reset(void)
{
        int ttyfd_open = global.ttyfd_open;
        memset(&global, 0, sizeof(global));
        global.ttyfd = -1;
        global.rfd = -1;
        global.wfd = -1;
        global.ttyfd_open = ttyfd_open;
        global.resize_pipefd[0] = -1;
        global.resize_pipefd[1] = -1;
        global.width = -1;
        global.height = -1;
        global.cursor_x = -1;
        global.cursor_y = -1;
        global.last_x = -1;
        global.last_y = -1;
        global.fg = TB_DEFAULT;
        global.bg = TB_DEFAULT;
        global.last_fg = ~global.fg;
        global.last_bg = ~global.bg;
        global.input_mode &= TB_INPUT_ESC;
        global.output_mode = TB_OUTPUT_NORMAL;
        return TB_OK;
}

#ifdef _WIN32

static int bytebuf_flush(struct bytebuf_t *b)
{
        if (b->len <= 0) {
                return TB_OK;
        }

        DWORD written = 0;

        HANDLE hout = global.hout;

        // Try console output first
        if (!WriteConsoleA(hout, b->buf, (DWORD)b->len, &written, NULL)) {

                // Fallback: pipes / redirected output
                if (!WriteFile(hout, b->buf, (DWORD)b->len, &written, NULL)) {
                        global.last_errno = GetLastError();
                        return TB_ERR;
                }
        }

        // We require full write (same behavior as your POSIX version)
        if (written != b->len) {
                global.last_errno = ERROR_WRITE_FAULT;
                return TB_ERR;
        }

        b->len = 0;
        return TB_OK;
}

#else

static int bytebuf_flush(struct bytebuf_t *b)
{
        if (b->len <= 0) {
                return TB_OK;
        }

        int fd = global.wfd;

        ssize_t write_rv = write(fd, b->buf, b->len);
        if (write_rv < 0 || (size_t)write_rv != b->len) {
                // Note, errno will be 0 on partial write
                global.last_errno = errno;
                return TB_ERR;
        }
        b->len = 0;
        return TB_OK;
}

#endif

static int bytebuf_free(struct bytebuf_t *b)
{
        if (b->buf) {
                tb_free(b->buf);
        }
        memset(b, 0, sizeof(*b));
        return TB_OK;
}

static int cap_trie_deinit(struct cap_trie_t *node)
{
        size_t j;
        for (j = 0; j < node->nchildren; j++) {
                cap_trie_deinit(&node->children[j]);
        }
        if (node->children) {
                tb_free(node->children);
        }
        memset(node, 0, sizeof(*node));
        return TB_OK;
}

static int cap_trie_add(const char *cap, uint16_t key, uint8_t mod)
{
        struct cap_trie_t *next, *node = &global.cap_trie;
        size_t i, j;

        if (!cap || strlen(cap) <= 0)
                return TB_OK; // Nothing to do for empty caps

        for (i = 0; cap[i] != '\0'; i++) {
                char c = cap[i];
                next = NULL;

                // Check if c is already a child of node
                for (j = 0; j < node->nchildren; j++) {
                        if (node->children[j].c == c) {
                                next = &node->children[j];
                                break;
                        }
                }
                if (!next) {
                        // We need to add a new child to node
                        node->nchildren += 1;
                        node->children = (struct cap_trie_t *)tb_realloc(node->children,
                                                                         sizeof(*node) * node->nchildren);
                        if (!node->children) {
                                return TB_ERR_MEM;
                        }
                        next = &node->children[node->nchildren - 1];
                        memset(next, 0, sizeof(*next));
                        next->c = c;
                }

                // Continue
                node = next;
        }

        if (node->is_leaf) {
                // Already a leaf here
                return TB_ERR_CAP_COLLISION;
        }

        node->is_leaf = 1;
        node->key = key;
        node->mod = mod;
        return TB_OK;
}

static int bytebuf_reserve(struct bytebuf_t *b, size_t sz)
{
        if (b->cap >= sz) {
                return TB_OK;
        }
        size_t newcap = b->cap > 0 ? b->cap : 1;
        while (newcap < sz) {
                newcap *= 2;
        }
        char *newbuf;
        if (b->buf) {
                newbuf = (char *)tb_realloc(b->buf, newcap);
        } else {
                newbuf = (char *)tb_malloc(newcap);
        }
        if (!newbuf) {
                return TB_ERR_MEM;
        }
        b->buf = newbuf;
        b->cap = newcap;
        return TB_OK;
}

int tb_utf8_char_length(char c)
{
        return utf8_length[(unsigned char)c];
}

int tb_utf8_char_to_unicode(uint32_t *out, const char *c)
{
        if (*c == '\0')
                return 0;

        int i;
        unsigned char len = tb_utf8_char_length(*c);
        unsigned char mask = utf8_mask[len - 1];
        uint32_t result = c[0] & mask;
        for (i = 1; i < len && c[i] != '\0'; ++i) {
                result <<= 6;
                result |= c[i] & 0x3f;
        }

        if (i != len)
                return i * -1;
        *out = result;
        return (int)len;
}

int tb_utf8_unicode_to_char(char *out, uint32_t c)
{
        int len = 0;
        int first;
        if (c < 0x80) {
                first = 0;
                len = 1;
        } else if (c < 0x800) {
                first = 0xc0;
                len = 2;
        } else if (c < 0x10000) {
                first = 0xe0;
                len = 3;
        } else if (c < 0x200000) {
                first = 0xf0;
                len = 4;
        } else if (c < 0x4000000) {
                first = 0xf8;
                len = 5;
        } else {
                first = 0xfc;
                len = 6;
        }

        for (int i = len - 1; i > 0; --i) {
                out[i] = (c & 0x3f) | 0x80;
                c >>= 6;
        }
        out[0] = c | first;
        out[len] = '\0';
        return len;
}

// -----------------------------------------------------------------------------
// Core event reading
// -----------------------------------------------------------------------------

#ifdef _WIN32

static int fkey_code(int f)
{
        switch (f) {
        case 1:
                return 11;
        case 2:
                return 12;
        case 3:
                return 13;
        case 4:
                return 14;
        case 5:
                return 15;
        case 6:
                return 17;
        case 7:
                return 18;
        case 8:
                return 19;
        case 9:
                return 20;
        case 10:
                return 21;
        case 11:
                return 23;
        case 12:
                return 24;
        default:
                return 0;
        }
}

static int encode_win_key_to_ansi(const KEY_EVENT_RECORD *k,
                                  char *buf,
                                  size_t bufsz)
{
        if (!k || !buf || bufsz == 0)
                return 0;

        DWORD vk = k->wVirtualKeyCode;
        DWORD state = k->dwControlKeyState;

        int ctrl = (state & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) != 0;
        int alt = (state & (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) != 0;

        int len;

        // Handle special keys first.
        // Some Windows key events also contain UnicodeChar values,
        // so virtual key handling must happen before text handling.

        switch (vk) {

        case VK_BACK:
                // Terminal backspace is usually DEL (^?)
                buf[0] = 0x7f;
                return 1;

        case VK_RETURN:
                // Alt+Enter becomes ESC CR (Meta+Enter)
                if (alt) {
                        buf[0] = 0x1b;
                        buf[1] = '\r';
                        return 2;
                }

                buf[0] = '\r';
                return 1;

        case VK_TAB:
                // Alt+Tab becomes ESC TAB
                if (alt) {
                        buf[0] = 0x1b;
                        buf[1] = '\t';
                        return 2;
                }

                buf[0] = '\t';
                return 1;

        case VK_ESCAPE:
                buf[0] = 0x1b;
                return 1;

        case VK_CANCEL:
                // Ctrl+C
                buf[0] = 3;
                return 1;

        // Navigation keys (xterm)
        case VK_LEFT:
                memcpy(buf, "\x1b[D", 3);
                return 3;

        case VK_RIGHT:
                memcpy(buf, "\x1b[C", 3);
                return 3;

        case VK_UP:
                memcpy(buf, "\x1b[A", 3);
                return 3;

        case VK_DOWN:
                memcpy(buf, "\x1b[B", 3);
                return 3;

        case VK_HOME:
                memcpy(buf, "\x1b[H", 3);
                return 3;

        case VK_END:
                memcpy(buf, "\x1b[F", 3);
                return 3;

        case VK_PRIOR:
                memcpy(buf, "\x1b[5~", 4);
                return 4;

        case VK_NEXT:
                memcpy(buf, "\x1b[6~", 4);
                return 4;

        case VK_DELETE:
                memcpy(buf, "\x1b[3~", 4);
                return 4;

        case VK_INSERT:
                memcpy(buf, "\x1b[2~", 4);
                return 4;

        case VK_CLEAR:
                memcpy(buf, "\x1b[Z", 3);
                return 3;

        // Function keys F1-F12
        case VK_F1 ... VK_F12: {
                int f = vk - VK_F1 + 1;
                int code = fkey_code(f);

                if (!code)
                        return 0;

                int mod = 0;

                if (state & SHIFT_PRESSED)
                        mod |= 1;

                if (ctrl)
                        mod |= 2;

                if (alt)
                        mod |= 4;

                int xmod = 0;

                switch (mod) {
                case 1:
                        xmod = 2;
                        break;

                case 2:
                        xmod = 5;
                        break;

                case 3:
                        xmod = 6;
                        break;

                case 4:
                        xmod = 3;
                        break;

                case 5:
                        xmod = 4;
                        break;

                case 6:
                        xmod = 7;
                        break;

                case 7:
                        xmod = 8;
                        break;
                }

                if (xmod)
                        len = snprintf(buf, bufsz,
                                       "\x1b[%d;%d~",
                                       code,
                                       xmod);
                else
                        len = snprintf(buf, bufsz,
                                       "\x1b[%d~",
                                       code);

                return len;
        }
        }

        // Ctrl+A-Z produces ASCII control codes
        if (ctrl && vk >= 'A' && vk <= 'Z') {
                buf[0] = (char)(vk - 'A' + 1);
                return 1;
        }

        // Alt+printable sends ESC prefix (Meta key)
        if (alt && k->uChar.UnicodeChar != 0) {

                WCHAR wc = k->uChar.UnicodeChar;

                buf[0] = 0x1b;

                len = WideCharToMultiByte(
                    CP_UTF8,
                    0,
                    &wc,
                    1,
                    buf + 1,
                    (int)bufsz - 1,
                    NULL,
                    NULL);

                return len > 0 ? len + 1 : 0;
        }

        // Normal Unicode input
        if (k->uChar.UnicodeChar != 0 && k->uChar.UnicodeChar != 27 && k->wVirtualKeyCode != 0) {

                WCHAR wc = k->uChar.UnicodeChar;



                len = WideCharToMultiByte(
                    CP_UTF8,
                    0,
                    &wc,
                    1,
                    buf,
                    (int)bufsz,
                    NULL,
                    NULL);

                return len > 0 ? len : 0;
        }

        return 0;
}

static int win_wait_event(struct tb_event *event, int timeout_ms)
{
        memset(event, 0, sizeof(*event));

        int rv = extract_event(event);
        if (rv == TB_OK)
                return TB_OK;

        if (timeout_ms == 0)
                return TB_ERR_NO_EVENT;

        DWORD sleep_ms = (timeout_ms < 0) ? 0 : (DWORD)timeout_ms;

        Sleep(sleep_ms);

        rv = extract_event(event);
        if (rv == TB_OK)
                return TB_OK;

        return TB_ERR_NO_EVENT;
}
#else

static int posix_wait_event(struct tb_event *event, int timeout_ms)
{
        int rv;
        char buf[TB_OPT_READ_BUF];

        memset(event, 0, sizeof(*event));

        // Try to extract an event from the existing buffer first
        rv = extract_event(event);
        if (rv == TB_OK)
                return TB_OK;

        // Setup select timeout
        fd_set fds;
        struct timeval tv;
        struct timeval *ptv = NULL;
        if (timeout_ms >= 0) {
                tv.tv_sec = timeout_ms / 1000;
                tv.tv_usec = (timeout_ms % 1000) * 1000;
                ptv = &tv;
        }

        while (1) {
                FD_ZERO(&fds);
                FD_SET(global.rfd, &fds);

                int maxfd = global.rfd;

                int sel = select(maxfd + 1, &fds, NULL, NULL, ptv);
                if (sel < 0) {
                        if (errno == EINTR)
                                continue;
                        global.last_errno = errno;
                        return TB_ERR_POLL;
                }
                if (sel == 0)
                        return TB_ERR_NO_EVENT;

                // Read terminal input if ready
                if (FD_ISSET(global.rfd, &fds)) {
                        ssize_t n = read(global.rfd, buf, sizeof(buf));
                        if (n < 0) {
                                global.last_errno = errno;
                                return TB_ERR_READ;
                        }
                        if (n > 0) {
                                bytebuf_nputs(&global.in, buf, n);
                        }
                }

                // Extract an event from buffer
                rv = extract_event(event);
                if (rv == TB_OK)
                        return TB_OK;

                // If non-blocking and no event, return
                if (timeout_ms >= 0)
                        return TB_ERR_NO_EVENT;
        }
}
#endif

static int wait_event(struct tb_event *event, int timeout_ms)
{
#ifdef _WIN32
        return win_wait_event(event, timeout_ms);
#else
        return posix_wait_event(event, timeout_ms);
#endif
}

static int extract_event(struct tb_event *event)
{
        struct bytebuf_t *in = &global.in;

        if (in->len == 0) {
                // Handle pending ESC from previous incomplete sequence
                if (global.esc_pending) {
                        event->type = TB_EVENT_KEY;
                        event->key = TB_KEY_ESC;
                        event->ch = 0;
                        event->mod = 0;
                        global.esc_pending = 0;
                        return TB_OK;
                }
                return TB_ERR;
        }

        if (in->buf[0] == '\n')
                in->buf[0] = '\r';

        // Handle ESC sequences
        if (in->buf[0] == '\x1b') {
                // Try to parse full escape sequence
                int rv = extract_esc(event);
                if (rv == TB_OK) {
                        global.esc_pending = 0;
                        return TB_OK;
                }

                // If not recognized, treat as ESC key
                if ((global.input_mode & TB_INPUT_ESC) && rv == TB_ERR_NEED_MORE) {
                        event->type = TB_EVENT_KEY;
                        event->key = TB_KEY_ESC;
                        event->ch = 0;
                        event->mod = 0;
                        bytebuf_shift(in, 1);
                        return TB_OK;
                }

                // Possibly Alt + key if more bytes follow
                if (in->len > 1) {
                        event->mod |= TB_MOD_ALT;
                        bytebuf_shift(in, 1);
                        return extract_event(event);
                }

                if (in->len >= 6 && in->buf[0] == '\x1b' && in->buf[1] == '[' && in->buf[2] == '<') {
                        int btn, x, y;
                        char type;
                        if (sscanf(in->buf, "\x1b[<%d;%d;%d%c", &btn, &x, &y, &type) == 4) {
                                event->type = TB_EVENT_MOUSE;
                                event->key = btn; // button code
                                event->x = x - 1; // terminal coordinates are 1-based
                                event->y = y - 1;
                                event->mod = 0;                             // parse modifiers if needed
                                bytebuf_shift(in, strlen((char *)in->buf)); // shift consumed bytes
                                return TB_OK;
                        }
                }

                return TB_ERR;
        }

        if (in->buf[0] == ' ' || in->buf[0] == TB_KEY_SPACE) {
                event->type = TB_EVENT_KEY;
                event->key = TB_KEY_SPACE;
                event->ch = 0;
                event->mod = 0;
                bytebuf_shift(in, 1);
                return TB_OK;
        }

        // Backspace
        if (in->buf[0] == 0x7f || in->buf[0] == TB_KEY_BACKSPACE2) {
                event->type = TB_EVENT_KEY;
                event->key = TB_KEY_BACKSPACE;
                event->ch = 0;
                event->mod = 0;
                bytebuf_shift(in, 1);
                return TB_OK;
        }

        // Enter \n
        if (((uint8_t)in->buf[0] == '\n' || (uint8_t)in->buf[0] == '\r') && event->mod == 0) {
                event->type = TB_EVENT_KEY;
                event->key = TB_KEY_ENTER;
                event->ch = 0;
                event->mod = 0;
                bytebuf_shift(in, 1);
                return TB_OK;
        }

        // Control keys (Ctrl + key)
        uint8_t c = in->buf[0];
        if (c < 0x20) {
                event->type = TB_EVENT_KEY;
                event->key = c;
                event->ch = 0;

                // Only set CTRL if it's not an Alt combo and not a special key like Enter/Tab/ESC
                if (!(event->mod & TB_MOD_ALT) &&
                    c != '\t' && c != '\n' && c != '\r' && c != '\033') {
                        event->mod |= TB_MOD_CTRL;
                }

                bytebuf_shift(in, 1);
                return TB_OK;
        }

        // UTF-8 printable keys
        int len = tb_utf8_char_length(in->buf[0]);
        if ((size_t)len <= in->len) {
                int ulen = tb_utf8_char_to_unicode(&event->ch, in->buf);
                if (ulen < 0) {
                        bytebuf_shift(in, 1);
                        return TB_ERR;
                }
                event->type = TB_EVENT_KEY;
                event->key = 0;
                bytebuf_shift(in, ulen);
                return TB_OK;
        }

        return TB_ERR;
}

static int cap_trie_find(const char *buf, size_t nbuf, struct cap_trie_t **last,
                         size_t *depth)
{
        struct cap_trie_t *next, *node = &global.cap_trie;
        size_t i, j;
        *last = node;
        *depth = 0;
        for (i = 0; i < nbuf; i++) {
                char c = buf[i];
                next = NULL;

                // Find c in node.children
                for (j = 0; j < node->nchildren; j++) {
                        if (node->children[j].c == c) {
                                next = &node->children[j];
                                break;
                        }
                }
                if (!next) {
                        // Not found
                        return TB_OK;
                }
                node = next;
                *last = node;
                *depth += 1;
                if (node->is_leaf && node->nchildren < 1) {
                        break;
                }
        }
        return TB_OK;
}

static int init_term_caps(void)
{
        cap_trie_add("\033[A", TB_KEY_ARROW_UP, 0);
        cap_trie_add("\033[B", TB_KEY_ARROW_DOWN, 0);
        cap_trie_add("\033[C", TB_KEY_ARROW_RIGHT, 0);
        cap_trie_add("\033[D", TB_KEY_ARROW_LEFT, 0);
        cap_trie_add("\033[Z", TB_KEY_TAB, TB_MOD_SHIFT); // shift+tab
        cap_trie_add("\033\t", TB_KEY_TAB, TB_MOD_SHIFT);

        cap_trie_add("\033[H", TB_KEY_HOME, 0);
        cap_trie_add("\033[F", TB_KEY_END, 0);
        cap_trie_add("\033[2~", TB_KEY_INSERT, 0);
        cap_trie_add("\033[3~", TB_KEY_DELETE, 0);
        cap_trie_add("\033[5~", TB_KEY_PGUP, 0);
        cap_trie_add("\033[6~", TB_KEY_PGDN, 0);

        cap_trie_add("\033OP", TB_KEY_F1, 0); // xterm
        cap_trie_add("\033OQ", TB_KEY_F2, 0);
        cap_trie_add("\033OR", TB_KEY_F3, 0);
        cap_trie_add("\033OS", TB_KEY_F4, 0);

        cap_trie_add("\033[[A", TB_KEY_F1, 0); // linux
        cap_trie_add("\033[[B", TB_KEY_F2, 0);
        cap_trie_add("\033[[C", TB_KEY_F3, 0);
        cap_trie_add("\033[[D", TB_KEY_F4, 0);
        cap_trie_add("\033[[E", TB_KEY_F5, 0);

        cap_trie_add("\033[11~", TB_KEY_F1, 0); // rxvt / urxvt
        cap_trie_add("\033[12~", TB_KEY_F2, 0);
        cap_trie_add("\033[13~", TB_KEY_F3, 0);
        cap_trie_add("\033[14~", TB_KEY_F4, 0);

        cap_trie_add("\033[15~", TB_KEY_F5, 0);
        cap_trie_add("\033[17~", TB_KEY_F6, 0);
        cap_trie_add("\033[18~", TB_KEY_F7, 0);
        cap_trie_add("\033[19~", TB_KEY_F8, 0);
        cap_trie_add("\033[20~", TB_KEY_F9, 0);
        cap_trie_add("\033[21~", TB_KEY_F10, 0);
        cap_trie_add("\033[23~", TB_KEY_F11, 0);
        cap_trie_add("\033[24~", TB_KEY_F12, 0);

        // enable mouse click + SGR reporting
        bytebuf_puts(&global.out, "\033[?1002h"); // button tracking (press+release+drag)
        bytebuf_puts(&global.out, "\033[?1006h"); // SGR mode
        bytebuf_puts(&global.out, "\033[?1000l"); // turn OFF X10 (buggy on many terms)
        bytebuf_flush(&global.out);

        if (load_terminfo() == TB_OK) {
                return parse_terminfo_caps();
        }
        return load_builtin_caps();
}

static int init_cap_trie(void)
{
        int rv, i;

        // Add caps from terminfo or built-in
        //
        // Collisions are expected as some terminfo entries have dupes. (For
        // example, att605-pc collides on TB_CAP_F4 and TB_CAP_DELETE.) First cap
        // in TB_CAP_* index order will win.
        //
        // TODO: Reorder TB_CAP_* so more critical caps come first.
        for (i = 0; i < TB_CAP__COUNT_KEYS; i++) {
                rv = cap_trie_add(global.caps[i], tb_key_i(i), 0);
                if (rv != TB_OK && rv != TB_ERR_CAP_COLLISION)
                        return rv;
        }

        // Add built-in mod caps
        //
        // Collisions are OK here as well. This can happen if global.caps collides
        // with builtin_mod_caps. It is desirable to give precedence to global.caps
        // here.
        for (i = 0; builtin_mod_caps[i].cap != NULL; i++) {
                rv = cap_trie_add(builtin_mod_caps[i].cap, builtin_mod_caps[i].key,
                                  builtin_mod_caps[i].mod);
                if (rv != TB_OK && rv != TB_ERR_CAP_COLLISION)
                        return rv;
        }

        return TB_OK;
}

#ifdef _WIN32

static int win_update_term_size(void)
{
        CONSOLE_SCREEN_BUFFER_INFO csbi;

        HANDLE h = global.hout;
        if (h == INVALID_HANDLE_VALUE || h == NULL)
                return TB_ERR_RESIZE_IOCTL;

        if (!GetConsoleScreenBufferInfo(h, &csbi))
                return TB_ERR_RESIZE_IOCTL;

        global.width =
            csbi.srWindow.Right - csbi.srWindow.Left + 1;
        global.height =
            csbi.srWindow.Bottom - csbi.srWindow.Top + 1;

        return TB_OK;
}

#else

static int posix_update_term_size(void)
{
        int rv, ioctl_errno;

        if (global.ttyfd < 0) {
                return TB_OK;
        }

        struct winsize sz;
        memset(&sz, 0, sizeof(sz));

        // Try ioctl TIOCGWINSZ
        if (ioctl(global.ttyfd, TIOCGWINSZ, &sz) == 0) {
                global.width = sz.ws_col;
                global.height = sz.ws_row;
                return TB_OK;
        }
        ioctl_errno = errno;

        // Try >cursor(9999,9999), >u7, <u6
        if_ok_return(rv, update_term_size_via_esc());

        global.last_errno = ioctl_errno;
        return TB_ERR_RESIZE_IOCTL;
}

#endif

static int update_term_size(void)
{
#ifdef _WIN32
        return win_update_term_size();
#else
        return posix_update_term_size();
#endif
}

#ifndef _WIN32

static int update_term_size_via_esc(void)
{
#ifndef TB_RESIZE_FALLBACK_MS
#define TB_RESIZE_FALLBACK_MS 1000
#endif

        char move_and_report[] = "\x1b[9999;9999H\x1b[6n";
        ssize_t write_rv =
            write(global.wfd, move_and_report, strlen(move_and_report));
        if (write_rv != (ssize_t)strlen(move_and_report)) {
                return TB_ERR_RESIZE_WRITE;
        }

        fd_set fds;
        FD_ZERO(&fds);
        FD_SET(global.rfd, &fds);

        struct timeval timeout;
        timeout.tv_sec = 0;
        timeout.tv_usec = TB_RESIZE_FALLBACK_MS * 1000;

        int select_rv = select(global.rfd + 1, &fds, NULL, NULL, &timeout);

        if (select_rv != 1) {
                global.last_errno = errno;
                return TB_ERR_RESIZE_POLL;
        }

        char buf[TB_OPT_READ_BUF];
        ssize_t read_rv = read(global.rfd, buf, sizeof(buf) - 1);
        if (read_rv < 1) {
                global.last_errno = errno;
                return TB_ERR_RESIZE_READ;
        }
        buf[read_rv] = '\0';

        int rw, rh;
        if (sscanf(buf, "\x1b[%d;%dR", &rh, &rw) != 2) {
                return TB_ERR_RESIZE_SSCANF;
        }

        global.width = rw;
        global.height = rh;
        return TB_OK;
}

#endif

static int bytebuf_shift(struct bytebuf_t *b, size_t n)
{
        if (n > b->len) {
                n = b->len;
        }
        size_t nmove = b->len - n;
        memmove(b->buf, b->buf + n, nmove);
        b->len -= n;
        return TB_OK;
}

static int bytebuf_puts(struct bytebuf_t *b, const char *str)
{
        if (!str || strlen(str) <= 0)
                return TB_OK; // Nothing to do for empty caps
        return bytebuf_nputs(b, str, (size_t)strlen(str));
}

static int bytebuf_nputs(struct bytebuf_t *b, const char *str, size_t nstr)
{
        int rv;
        if_err_return(rv, bytebuf_reserve(b, b->len + nstr + 1));
        memcpy(b->buf + b->len, str, nstr);
        b->len += nstr;
        b->buf[b->len] = '\0';
        return TB_OK;
}

static int extract_esc_cap(struct tb_event *event)
{
        int rv;
        struct bytebuf_t *in = &global.in;
        struct cap_trie_t *node;
        size_t depth;

        if_err_return(rv, cap_trie_find(in->buf, in->len, &node, &depth));
        if (node->is_leaf) {
                // Found a leaf node
                event->type = TB_EVENT_KEY;
                event->ch = 0;
                event->key = node->key;
                event->mod = node->mod;
                bytebuf_shift(in, depth);
                return TB_OK;
        } else if (node->nchildren > 0 && in->len <= depth) {
                // Found a branch node (not enough input)
                return TB_ERR_NEED_MORE;
        }

        return TB_ERR;
}

static int extract_esc_user(struct tb_event *event, int is_post)
{
        int rv;
        size_t consumed = 0;
        struct bytebuf_t *in = &global.in;
        int (*fn)(struct tb_event *, size_t *);

        fn = is_post ? global.fn_extract_esc_post : global.fn_extract_esc_pre;

        if (!fn) {
                return TB_ERR;
        }

        rv = fn(event, &consumed);
        if (rv == TB_OK) {
                bytebuf_shift(in, consumed);
        }

        if_ok_or_need_more_return(rv, rv);
        return TB_ERR;
}

static int extract_esc_mouse(struct tb_event *event)
{
        struct bytebuf_t *in = &global.in;

        enum {
                TYPE_VT200 = 0,
                TYPE_1006,
                TYPE_1015,
                TYPE_MAX
        };

        const char *cmp[TYPE_MAX] = {//
                                     // X10 mouse encoding, the simplest one
                                     // \x1b [ M Cb Cx Cy
                                     [TYPE_VT200] = "\x1b[M",
                                     // xterm 1006 extended mode or urxvt 1015 extended mode
                                     // xterm: \x1b [ < Cb ; Cx ; Cy (M or m)
                                     [TYPE_1006] = "\x1b[<",
                                     // urxvt: \x1b [ Cb ; Cx ; Cy M
                                     [TYPE_1015] = "\x1b["};

        int type = 0;
        int ret = TB_ERR;

        // Unrolled at compile-time (probably)
        for (; type < TYPE_MAX; type++) {
                size_t size = strlen(cmp[type]);

                if (in->len >= size && (strncmp(cmp[type], in->buf, size)) == 0) {
                        break;
                }
        }

        if (type == TYPE_MAX) {
                ret = TB_ERR; // No match
                return ret;
        }

        size_t buf_shift = 0;

        switch (type) {
        case TYPE_VT200:
                if (in->len >= 6) {
                        int b = in->buf[3] - 0x20;
                        int fail = 0;

                        switch (b & 3) {
                        case 0:
                                event->key = ((b & 64) != 0) ? TB_KEY_MOUSE_WHEEL_UP
                                                             : TB_KEY_MOUSE_LEFT;
                                break;
                        case 1:
                                event->key = ((b & 64) != 0) ? TB_KEY_MOUSE_WHEEL_DOWN
                                                             : TB_KEY_MOUSE_MIDDLE;
                                break;
                        case 2:
                                event->key = TB_KEY_MOUSE_RIGHT;
                                break;
                        case 3:
                                event->key = TB_KEY_MOUSE_RELEASE;
                                break;
                        default:
                                ret = TB_ERR;
                                fail = 1;
                                break;
                        }

                        if (!fail) {
                                if ((b & 32) != 0) {
                                        event->mod |= TB_MOD_MOTION;
                                }

                                // the coord is 1,1 for upper left
                                event->x = ((uint8_t)in->buf[4]) - 0x21;
                                event->y = ((uint8_t)in->buf[5]) - 0x21;

                                ret = TB_OK;
                        }

                        buf_shift = 6;
                }
                break;
        case TYPE_1006:
                // fallthrough
        case TYPE_1015: {
                size_t index_fail = (size_t)-1;

                enum {
                        FIRST_M = 0,
                        FIRST_SEMICOLON,
                        LAST_SEMICOLON,
                        FIRST_LAST_MAX
                };

                size_t indices[FIRST_LAST_MAX] = {index_fail, index_fail,
                                                  index_fail};
                int m_is_capital = 0;

                for (size_t i = 0; i < in->len; i++) {
                        if (in->buf[i] == ';') {
                                if (indices[FIRST_SEMICOLON] == index_fail) {
                                        indices[FIRST_SEMICOLON] = i;
                                } else {
                                        indices[LAST_SEMICOLON] = i;
                                }
                        } else if (indices[FIRST_M] == index_fail) {
                                if (in->buf[i] == 'm' || in->buf[i] == 'M') {
                                        m_is_capital = (in->buf[i] == 'M');
                                        indices[FIRST_M] = i;
                                }
                        }
                }

                if (indices[FIRST_M] == index_fail ||
                    indices[FIRST_SEMICOLON] == index_fail ||
                    indices[LAST_SEMICOLON] == index_fail) {
                        ret = TB_ERR;
                } else {
                        int start = (type == TYPE_1015 ? 2 : 3);

                        unsigned n1 = strtoul(&in->buf[start], NULL, 10);
                        unsigned n2 =
                            strtoul(&in->buf[indices[FIRST_SEMICOLON] + 1], NULL, 10);
                        unsigned n3 =
                            strtoul(&in->buf[indices[LAST_SEMICOLON] + 1], NULL, 10);

                        if (type == TYPE_1015) {
                                n1 -= 0x20;
                        }

                        int fail = 0;

                        switch (n1 & 3) {
                        case 0:
                                event->key = ((n1 & 64) != 0) ? TB_KEY_MOUSE_WHEEL_UP
                                                              : TB_KEY_MOUSE_LEFT;
                                break;
                        case 1:
                                event->key = ((n1 & 64) != 0) ? TB_KEY_MOUSE_WHEEL_DOWN
                                                              : TB_KEY_MOUSE_MIDDLE;
                                break;
                        case 2:
                                event->key = TB_KEY_MOUSE_RIGHT;
                                break;
                        case 3:
                                event->key = TB_KEY_MOUSE_RELEASE;
                                break;
                        default:
                                ret = TB_ERR;
                                fail = 1;
                                break;
                        }

                        buf_shift = in->len;

                        if (!fail) {
                                if (!m_is_capital) {
                                        // on xterm mouse release is signaled by lowercase m
                                        event->key = TB_KEY_MOUSE_RELEASE;
                                }

                                if ((n1 & 32) != 0) {
                                        event->mod |= TB_MOD_MOTION;
                                }

                                event->x = ((uint8_t)n2) - 1;
                                event->y = ((uint8_t)n3) - 1;

                                ret = TB_OK;
                        }
                }
        } break;
        case TYPE_MAX:
                ret = TB_ERR;
        }

        if (buf_shift > 0) {
                bytebuf_shift(in, buf_shift);
        }

        if (ret == TB_OK) {
                event->type = TB_EVENT_MOUSE;
        }

        return ret;
}

static const char *get_terminfo_string(int16_t str_offsets_pos,
                                       int16_t str_offsets_len, int16_t str_table_pos, int16_t str_table_len,
                                       int16_t str_index)
{
        const int str_byte_index = (int)str_index * (int)sizeof(int16_t);
        if (str_byte_index >= (int)str_offsets_len * (int)sizeof(int16_t)) {
                // An offset beyond the table indicates absent
                // See `convert_strings` in tinfo `read_entry.c`
                return "";
        }
        const int16_t *str_offset =
            (int16_t *)(global.terminfo + (int)str_offsets_pos + str_byte_index);
        if ((char *)str_offset >= global.terminfo + global.nterminfo) {
                // str_offset points beyond end of entry
                // Truncated/corrupt terminfo entry?
                return NULL;
        }
        if (*str_offset < 0 || *str_offset >= str_table_len) {
                // A negative offset indicates absent
                // An offset beyond the table indicates absent
                // See `convert_strings` in tinfo `read_entry.c`
                return "";
        }
        if (((size_t)((int)str_table_pos + (int)*str_offset)) >= global.nterminfo) {
                // string points beyond end of entry
                // Truncated/corrupt terminfo entry?
                return NULL;
        }
        return (
            const char *)(global.terminfo + (int)str_table_pos + (int)*str_offset);
}

static int cellbuf_free(struct cellbuf_t *c)
{
        if (c->cells) {
                int i;
                for (i = 0; i < c->width * c->height; i++) {
                        cell_free(&c->cells[i]);
                }
                tb_free(c->cells);
        }
        memset(c, 0, sizeof(*c));
        return TB_OK;
}

static int load_terminfo(void)
{
        int rv;
        char tmp[TB_PATH_MAX];

        // See terminfo(5) "Fetching Compiled Descriptions" for a description of
        // this behavior. Some of these paths are compile-time ncurses options, so
        // best guesses are used here.
        const char *term = getenv("TERM");
        if (!term) {
                return TB_ERR;
        }

        // If TERMINFO is set, try that directory and stop
        const char *terminfo = getenv("TERMINFO");
        if (terminfo) {
                return load_terminfo_from_path(terminfo, term);
        }

        // Next try ~/.terminfo
        const char *home = getenv("HOME");
        if (home) {
                snprintf_or_return(rv, tmp, sizeof(tmp), "%s/.terminfo", home);
                if_ok_return(rv, load_terminfo_from_path(tmp, term));
        }

        // Next try TERMINFO_DIRS
        //
        // Note, empty entries are supposed to be interpretted as the "compiled-in
        // default", which is of course system-dependent. Previously /etc/terminfo
        // was used here. Let's skip empty entries altogether rather than give
        // precedence to a guess, and check common paths after this loop.
        const char *dirs = getenv("TERMINFO_DIRS");
        if (dirs) {
                snprintf_or_return(rv, tmp, sizeof(tmp), "%s", dirs);
                char *dir = strtok(tmp, ":");
                while (dir) {
                        const char *cdir = dir;
                        if (*cdir != '\0') {
                                if_ok_return(rv, load_terminfo_from_path(cdir, term));
                        }
                        dir = strtok(NULL, ":");
                }
        }

#ifdef TB_TERMINFO_DIR
        if_ok_return(rv, load_terminfo_from_path(TB_TERMINFO_DIR, term));
#endif
        if_ok_return(rv, load_terminfo_from_path("/usr/local/etc/terminfo", term));
        if_ok_return(rv,
                     load_terminfo_from_path("/usr/local/share/terminfo", term));
        if_ok_return(rv, load_terminfo_from_path("/usr/local/lib/terminfo", term));
        if_ok_return(rv, load_terminfo_from_path("/etc/terminfo", term));
        if_ok_return(rv, load_terminfo_from_path("/usr/share/terminfo", term));
        if_ok_return(rv, load_terminfo_from_path("/usr/lib/terminfo", term));
        if_ok_return(rv, load_terminfo_from_path("/usr/share/lib/terminfo", term));
        if_ok_return(rv, load_terminfo_from_path("/lib/terminfo", term));

        return TB_ERR;
}

static int load_terminfo_from_path(const char *path, const char *term)
{
        int rv;
        char tmp[TB_PATH_MAX];

        // Look for term at this terminfo location, e.g., <terminfo>/x/xterm
        snprintf_or_return(rv, tmp, sizeof(tmp), "%s/%c/%s", path, term[0], term);
        if_ok_return(rv, read_terminfo_path(tmp));

#ifdef __APPLE__
        // Try the Darwin equivalent path, e.g., <terminfo>/78/xterm
        snprintf_or_return(rv, tmp, sizeof(tmp), "%s/%x/%s", path, term[0], term);
        return read_terminfo_path(tmp);
#endif

        return TB_ERR;
}

static int read_terminfo_path(const char *path)
{
        FILE *fp = fopen(path, "rb");
        if (!fp) {
                return TB_ERR;
        }

        struct stat st;
        if (fstat(fileno(fp), &st) != 0) {
                fclose(fp);
                return TB_ERR;
        }

        size_t fsize = st.st_size;
        char *data = (char *)tb_malloc(fsize);
        if (!data) {
                fclose(fp);
                return TB_ERR;
        }

        if (fread(data, 1, fsize, fp) != fsize) {
                fclose(fp);
                tb_free(data);
                return TB_ERR;
        }

        global.terminfo = data;
        global.nterminfo = fsize;

        fclose(fp);
        return TB_OK;
}

static int parse_terminfo_caps(void)
{
        // See term(5) "LEGACY STORAGE FORMAT" and "EXTENDED STORAGE FORMAT" for a
        // description of this behavior.

        // Ensure there's at least a header's worth of data
        if (global.nterminfo < 6) {
                return TB_ERR;
        }

        int16_t *header = (int16_t *)global.terminfo;
        // header[0] the magic number (octal 0432 or 01036)
        // header[1] the size, in bytes, of the names section
        // header[2] the number of bytes in the boolean section
        // header[3] the number of short integers in the numbers section
        // header[4] the number of offsets (short integers) in the strings section
        // header[5] the size, in bytes, of the string table

        // Legacy ints are 16-bit, extended ints are 32-bit
        const int bytes_per_int = header[0] == 01036 ? 4  // 32-bit
                                                     : 2; // 16-bit

        // > Between the boolean section and the number section, a null byte will be
        // > inserted, if necessary, to ensure that the number section begins on an
        // > even byte
        const int align_offset = (header[1] + header[2]) % 2 != 0 ? 1 : 0;

        const int pos_str_offsets =
            (6 * sizeof(int16_t)) // header (12 bytes)
            + header[1]           // length of names section
            + header[2]           // length of boolean section
            + align_offset +
            (header[3] * bytes_per_int); // length of numbers section

        const int pos_str_table =
            pos_str_offsets +
            (header[4] * sizeof(int16_t)); // length of string offsets table

        // Load caps
        int i;
        for (i = 0; i < TB_CAP__COUNT; i++) {
                const char *cap = get_terminfo_string(pos_str_offsets, header[4],
                                                      pos_str_table, header[5], terminfo_cap_indexes[i]);
                if (!cap) {
                        // Something is not right
                        return TB_ERR;
                }
                global.caps[i] = cap;
        }

        return TB_OK;
}

static int cell_free(struct tb_cell *cell)
{
#ifdef TB_OPT_EGC
        if (cell->ech) {
                tb_free(cell->ech);
        }
#endif
        memset(cell, 0, sizeof(*cell));
        return TB_OK;
}

// ESC/mouse parsing (simplified, does not use bytebuf)
static int extract_esc(struct tb_event *event)
{
        int rv;
        if_ok_or_need_more_return(rv, extract_esc_user(event, 0));
        if_ok_or_need_more_return(rv, extract_esc_cap(event));   // handles arrows/F-keys
        if_ok_or_need_more_return(rv, extract_esc_mouse(event)); // handles mouse
        if_ok_or_need_more_return(rv, extract_esc_user(event, 1));
        return TB_ERR;
}
#endif // TB_IMPL
