/*
 * 3DS OUTSCALE API
 *
 * Welcome to the OUTSCALE API documentation.<br /> The OUTSCALE API enables you to manage your resources in the OUTSCALE Cloud. This documentation describes the different actions available along with code examples.<br /><br /> Throttling: To protect against overloads, the number of identical requests allowed in a given time period is limited.<br /> Brute force: To protect against brute force attacks, the number of failed authentication attempts in a given time period is limited.<br /><br /> Note that the OUTSCALE Cloud is compatible with Amazon Web Services (AWS) APIs, but there are [differences in resource names](https://docs.outscale.com/en/userguide/About-the-APIs.html) between AWS and the OUTSCALE API.<br /> You can also manage your resources using the [Cockpit](https://docs.outscale.com/en/userguide/About-Cockpit.html) web interface.<br /><br /> An OpenAPI description of this API is also available for download: <button>[GitHub repository](https://github.com/outscale/osc-api)</button><br /> # Authentication Schemes ### Access Key/Secret Key The main way to authenticate your requests to the OUTSCALE API is to use an access key and a secret key.<br /> The mechanism behind this is based on AWS Signature Version 4, whose technical implementation details are described in [Signature of API Requests](https://docs.outscale.com/en/userguide/Signature-of-API-Requests.html).<br /><br /> In practice, the way to specify your access key and secret key depends on the tool or SDK you want to use to interact with the API.<br />  > For example, if you use OSC CLI: > 1. You need to create an **~/.osc/config.json** file to specify your access key, secret key, and the Region of your account. > 2. You then specify the `--profile` option when executing OSC CLI commands. > > For more information, see [Installing and Configuring OSC CLI](https://docs.outscale.com/en/userguide/Installing-and-Configuring-OSC-CLI.html).  See the code samples in each section of this documentation for specific examples in different programming languages.<br /> For more information about access keys, see [About Access Keys](https://docs.outscale.com/en/userguide/About-Access-Keys.html).  > If you try to sign requests with an invalid access key four times in a row, further authentication attempts will be prevented for 1 minute. This lockout time increases 1 minute every four failed attempts, for up to 10 minutes.  ### Login/Password For certain API actions, you can also use basic authentication with the login (email address) and password of your OUTSCALE account.<br /> This is useful only in special circumstances, for example if you do not know your access key/secret key and want to retrieve them programmatically.<br /> In most cases, however, you can use the Cockpit web interface to retrieve them.<br />  > For example, if you use OSC CLI: > 1. You need to create an **~/.osc/config.json** file to specify the Region of your account, but you leave the access key value and secret key value empty (`&quot;&quot;`). > 2. You then specify the `--profile`, `--authentication-method`, `--login`, and `--password` options when executing OSC CLI commands.  See the code samples in each section of this documentation for specific examples in different programming languages.  > If you try to sign requests with an invalid password four times in a row, further authentication attempts will be prevented for 1 minute. This lockout time increases 1 minute every four failed attempts, for up to 10 minutes.  ### No Authentication A few API actions do not require any authentication. They are indicated as such in this documentation.<br /> ### Other Security Mechanisms In parallel with the authentication schemes, you can add other security mechanisms to your OUTSCALE account, for example to restrict API requests by IP or other criteria.<br /> For more information, see [Managing Your API Accesses](https://docs.outscale.com/en/userguide/Managing-Your-API-Accesses.html). # Pagination Tutorial You can learn more about the pagination methods for read calls in the dedicated [pagination tutorial](https://docs.outscale.com/en/userguide/Tutorial-Paginating-an-API-Request.html). # Error Codes Reference You can learn more about errors returned by the API in the dedicated [errors page](api-errors.html).
 *
 * API version: 1.41.0
 * Contact: support@outscale.com
 */

// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.

package osc

import (
	"context"
	"fmt"
	"net/http"
	"strings"
)

// contextKeys are used to identify the type of value in the context.
// Since these are string, it is possible to get a short description of the
// context key for logging and debugging using key.String().

type contextKey string

func (c contextKey) String() string {
	return "auth " + string(c)
}

var (
	// ContextOAuth2 takes an oauth2.TokenSource as authentication for the request.
	ContextOAuth2 = contextKey("token")

	// ContextBasicAuth takes BasicAuth as authentication for the request.
	ContextBasicAuth = contextKey("basic")

	// ContextAccessToken takes a string oauth2 access token as authentication for the request.
	ContextAccessToken = contextKey("accesstoken")

	// ContextAPIKeys takes a string apikey as authentication for the request
	ContextAPIKeys = contextKey("apiKeys")

	// ContextAWSv4 takes an Access Key and a Secret Key for signing AWS Signature v4
	ContextAWSv4 = contextKey("awsv4")

	// ContextHttpSignatureAuth takes HttpSignatureAuth as authentication for the request.
	ContextHttpSignatureAuth = contextKey("httpsignature")

	// ContextServerIndex uses a server configuration from the index.
	ContextServerIndex = contextKey("serverIndex")

	// ContextOperationServerIndices uses a server configuration from the index mapping.
	ContextOperationServerIndices = contextKey("serverOperationIndices")

	// ContextServerVariables overrides a server configuration variables.
	ContextServerVariables = contextKey("serverVariables")

	// ContextOperationServerVariables overrides a server configuration variables using operation specific values.
	ContextOperationServerVariables = contextKey("serverOperationVariables")
)

// BasicAuth provides basic http authentication to a request passed via context using ContextBasicAuth
type BasicAuth struct {
	UserName string `json:"userName,omitempty"`
	Password string `json:"password,omitempty"`
}

// APIKey provides API key based authentication to a request passed via context using ContextAPIKey
type APIKey struct {
	Key    string
	Prefix string
}

// AWSv4 provides AWS Signature to a request passed via context using ContextAWSv4
// https://docs.aws.amazon.com/general/latest/gr/signature-version-4.html
type AWSv4 struct {
	AccessKey string
	SecretKey string
}

// ServerVariable stores the information about a server variable
type ServerVariable struct {
	Description  string
	DefaultValue string
	EnumValues   []string
}

// ServerConfiguration stores the information about a server
type ServerConfiguration struct {
	URL         string
	Description string
	Variables   map[string]ServerVariable
}

// ServerConfigurations stores multiple ServerConfiguration items
type ServerConfigurations []ServerConfiguration

// Configuration stores the configuration of the API client
type Configuration struct {
	Host             string            `json:"host,omitempty"`
	Scheme           string            `json:"scheme,omitempty"`
	DefaultHeader    map[string]string `json:"defaultHeader,omitempty"`
	UserAgent        string            `json:"userAgent,omitempty"`
	Debug            bool              `json:"debug,omitempty"`
	Servers          ServerConfigurations
	OperationServers map[string]ServerConfigurations
	HTTPClient       *http.Client
}

// NewConfiguration returns a new Configuration object
func NewConfiguration() *Configuration {
	cfg := &Configuration{
		DefaultHeader: make(map[string]string),
		UserAgent:     "osc-sdk-go/2.34.0",
		Debug:         false,
		Servers: ServerConfigurations{
			{
				URL:         "https://api.{region}.outscale.com/api/v1",
				Description: "No description provided",
				Variables: map[string]ServerVariable{
					"region": ServerVariable{
						Description:  "No description provided",
						DefaultValue: "eu-west-2",
						EnumValues: []string{
							"ap-northeast-1",
							"cloudgouv-eu-west-1",
							"eu-west-2",
							"us-east-2",
							"us-west-1",
						},
					},
				},
			},
		},
		OperationServers: map[string]ServerConfigurations{},
	}
	return cfg
}

// AddDefaultHeader adds a new HTTP header to the default header in the request
func (c *Configuration) AddDefaultHeader(key string, value string) {
	c.DefaultHeader[key] = value
}

// URL formats template on a index using given variables
func (sc ServerConfigurations) URL(index int, variables map[string]string) (string, error) {
	if index < 0 || len(sc) <= index {
		return "", fmt.Errorf("Index %v out of range %v", index, len(sc)-1)
	}
	server := sc[index]
	url := server.URL

	// go through variables and replace placeholders
	for name, variable := range server.Variables {
		if value, ok := variables[name]; ok {
			url = strings.Replace(url, "{"+name+"}", value, -1)
		} else {
			url = strings.Replace(url, "{"+name+"}", variable.DefaultValue, -1)
		}
	}
	return url, nil
}

// ServerURL returns URL based on server settings
func (c *Configuration) ServerURL(index int, variables map[string]string) (string, error) {
	return c.Servers.URL(index, variables)
}

func getServerIndex(ctx context.Context) (int, error) {
	si := ctx.Value(ContextServerIndex)
	if si != nil {
		if index, ok := si.(int); ok {
			return index, nil
		}
		return 0, reportError("Invalid type %T should be int", si)
	}
	return 0, nil
}

func getServerOperationIndex(ctx context.Context, endpoint string) (int, error) {
	osi := ctx.Value(ContextOperationServerIndices)
	if osi != nil {
		if operationIndices, ok := osi.(map[string]int); !ok {
			return 0, reportError("Invalid type %T should be map[string]int", osi)
		} else {
			index, ok := operationIndices[endpoint]
			if ok {
				return index, nil
			}
		}
	}
	return getServerIndex(ctx)
}

func getServerVariables(ctx context.Context) (map[string]string, error) {
	sv := ctx.Value(ContextServerVariables)
	if sv != nil {
		if variables, ok := sv.(map[string]string); ok {
			return variables, nil
		}
		return nil, reportError("ctx value of ContextServerVariables has invalid type %T should be map[string]string", sv)
	}
	return nil, nil
}

func getServerOperationVariables(ctx context.Context, endpoint string) (map[string]string, error) {
	osv := ctx.Value(ContextOperationServerVariables)
	if osv != nil {
		if operationVariables, ok := osv.(map[string]map[string]string); !ok {
			return nil, reportError("ctx value of ContextOperationServerVariables has invalid type %T should be map[string]map[string]string", osv)
		} else {
			variables, ok := operationVariables[endpoint]
			if ok {
				return variables, nil
			}
		}
	}
	return getServerVariables(ctx)
}

// ServerURLWithContext returns a new server URL given an endpoint
func (c *Configuration) ServerURLWithContext(ctx context.Context, endpoint string) (string, error) {
	sc, ok := c.OperationServers[endpoint]
	if !ok {
		sc = c.Servers
	}

	if ctx == nil {
		return sc.URL(0, nil)
	}

	index, err := getServerOperationIndex(ctx, endpoint)
	if err != nil {
		return "", err
	}

	variables, err := getServerOperationVariables(ctx, endpoint)
	if err != nil {
		return "", err
	}

	return sc.URL(index, variables)
}
