/*
Copyright (c) 2015 VMware, Inc. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package soap

import (
	"context"
	"fmt"
	"net/http"
	"net/url"
	"os"
	"testing"
)

type mockRT struct{}

func (m mockRT) RoundTrip(req *http.Request) (*http.Response, error) {
	var res http.Response
	res.Header = req.Header.Clone()
	return &res, nil
}

func TestUserAgent(t *testing.T) {
	tests := []struct {
		name  string
		agent string
	}{
		{name: "default agent", agent: ""},
		{name: "custom agent", agent: "govmomi-test/0.0.0"},
	}

	const rawURL = "https://vcenter.local"
	u, err := url.Parse(rawURL)
	if err != nil {
		t.Fatalf("parse url: %v", err)
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			c := NewClient(u, false)
			c.Transport = &mockRT{}

			req, err := http.NewRequest(http.MethodPost, rawURL, nil)
			if err != nil {
				t.Fatalf("create request: %v", err)
			}

			if test.agent != "" {
				c.UserAgent = test.agent
			}

			if err = c.Do(context.Background(), req, func(response *http.Response) error {
				got := response.Header.Get("user-agent")
				want := func() string {
					if test.agent == "" {
						return defaultUserAgent
					}
					return test.agent
				}

				if got != want() {
					return fmt.Errorf("user-agent header mismatch: got=%s want=%s", got, want())
				}
				return nil
			}); err != nil {
				t.Errorf("user-agent header validation failed: %v", err)
			}
		})
	}
}

func TestSplitHostPort(t *testing.T) {
	tests := []struct {
		url  string
		host string
		port string
	}{
		{"127.0.0.1", "127.0.0.1", ""},
		{"*:1234", "*", "1234"},
		{"127.0.0.1:80", "127.0.0.1", "80"},
		{"[::1]:6767", "[::1]", "6767"},
		{"[::1]", "[::1]", ""},
	}

	for _, test := range tests {
		host, port := splitHostPort(test.url)
		if host != test.host {
			t.Errorf("(%s) %s != %s", test.url, host, test.host)
		}
		if port != test.port {
			t.Errorf("(%s) %s != %s", test.url, port, test.port)
		}
	}
}

func TestMultipleCAPaths(t *testing.T) {
	err := setCAsOnClient("fixtures/invalid-cert.pem:fixtures/valid-cert.pem")

	certErr, ok := err.(errInvalidCACertificate)
	if !ok {
		t.Fatalf("Expected errInvalidCACertificate to occur")
	}
	if certErr.File != "fixtures/invalid-cert.pem" {
		t.Fatalf("Expected Err to show invalid file")
	}
}

func TestInvalidRootCAPath(t *testing.T) {
	err := setCAsOnClient("fixtures/there-is-no-such-file")

	if _, ok := err.(*os.PathError); !ok {
		t.Fatalf("os.PathError should have occurred: %#v", err)
	}
}

func TestValidRootCAs(t *testing.T) {
	err := setCAsOnClient("fixtures/valid-cert.pem")
	if err != nil {
		t.Fatalf("Err should not have occurred: %#v", err)
	}
}

func TestInvalidRootCAs(t *testing.T) {
	err := setCAsOnClient("fixtures/invalid-cert.pem")

	certErr, ok := err.(errInvalidCACertificate)
	if !ok {
		t.Fatalf("Expected errInvalidCACertificate to occur")
	}
	if certErr.File != "fixtures/invalid-cert.pem" {
		t.Fatalf("Expected Err to show invalid file")
	}
}

func setCAsOnClient(cas string) error {
	url := &url.URL{
		Scheme: "https",
		Host:   "some.host.tld:8080",
	}
	insecure := false

	client := NewClient(url, insecure)

	return client.SetRootCAs(cas)
}
