// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package templates

import (
	"context"
	"html/template"
	"os"
	"strings"
	"testing"

	"code.gitea.io/gitea/models/issues"
	"code.gitea.io/gitea/models/unittest"
	"code.gitea.io/gitea/modules/git"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/markup"
	"code.gitea.io/gitea/modules/test"
	"code.gitea.io/gitea/modules/translation"

	"github.com/stretchr/testify/assert"
)

func testInput() string {
	s := `  space @mention-user<SPACE><SPACE>
/just/a/path.bin
https://example.com/file.bin
[local link](file.bin)
[remote link](https://example.com)
[[local link|file.bin]]
[[remote link|https://example.com]]
![local image](image.jpg)
![remote image](https://example.com/image.jpg)
[[local image|image.jpg]]
[[remote link|https://example.com/image.jpg]]
https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash
com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb
com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
:+1:
mail@domain.com
@mention-user test
#123
  space<SPACE><SPACE>
`
	return strings.ReplaceAll(s, "<SPACE>", " ")
}

var testMetas = map[string]string{
	"user":                         "user13",
	"repo":                         "repo11",
	"repoPath":                     "../../tests/gitea-repositories-meta/user13/repo11.git/",
	"markdownLineBreakStyle":       "comment",
	"markupAllowShortIssuePattern": "true",
}

func TestMain(m *testing.M) {
	unittest.InitSettings()
	if err := git.InitSimple(context.Background()); err != nil {
		log.Fatal("git init failed, err: %v", err)
	}
	markup.Init(&markup.RenderHelperFuncs{
		IsUsernameMentionable: func(ctx context.Context, username string) bool {
			return username == "mention-user"
		},
	})
	os.Exit(m.Run())
}

func newTestRenderUtils() *RenderUtils {
	ctx := context.Background()
	ctx = context.WithValue(ctx, translation.ContextKey, &translation.MockLocale{})
	return NewRenderUtils(ctx)
}

func TestRenderCommitBody(t *testing.T) {
	defer test.MockVariableValue(&markup.RenderBehaviorForTesting.DisableAdditionalAttributes, true)()
	type args struct {
		msg string
	}
	tests := []struct {
		name string
		args args
		want template.HTML
	}{
		{
			name: "multiple lines",
			args: args{
				msg: "first line\nsecond line",
			},
			want: "second line",
		},
		{
			name: "multiple lines with leading newlines",
			args: args{
				msg: "\n\n\n\nfirst line\nsecond line",
			},
			want: "second line",
		},
		{
			name: "multiple lines with trailing newlines",
			args: args{
				msg: "first line\nsecond line\n\n\n",
			},
			want: "second line",
		},
	}
	ut := newTestRenderUtils()
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			assert.Equalf(t, tt.want, ut.RenderCommitBody(tt.args.msg, nil), "RenderCommitBody(%v, %v)", tt.args.msg, nil)
		})
	}

	expected := `/just/a/path.bin
<a href="https://example.com/file.bin">https://example.com/file.bin</a>
[local link](file.bin)
[remote link](<a href="https://example.com">https://example.com</a>)
[[local link|file.bin]]
[[remote link|<a href="https://example.com">https://example.com</a>]]
![local image](image.jpg)
![remote image](<a href="https://example.com/image.jpg">https://example.com/image.jpg</a>)
[[local image|image.jpg]]
[[remote link|<a href="https://example.com/image.jpg">https://example.com/image.jpg</a>]]
<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" class="compare"><code class="nohighlight">88fc37a3c0...12fc37a3c0 (hash)</code></a>
com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" class="commit"><code class="nohighlight">88fc37a3c0</code></a>
com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
<span class="emoji" aria-label="thumbs up">👍</span>
<a href="mailto:mail@domain.com">mail@domain.com</a>
<a href="/mention-user">@mention-user</a> test
<a href="/user13/repo11/issues/123" class="ref-issue">#123</a>
  space`
	assert.EqualValues(t, expected, string(newTestRenderUtils().RenderCommitBody(testInput(), testMetas)))
}

func TestRenderCommitMessage(t *testing.T) {
	expected := `space <a href="/mention-user" data-markdown-generated-content="">@mention-user</a>  `
	assert.EqualValues(t, expected, newTestRenderUtils().RenderCommitMessage(testInput(), testMetas))
}

func TestRenderCommitMessageLinkSubject(t *testing.T) {
	expected := `<a href="https://example.com/link" class="muted">space </a><a href="/mention-user" data-markdown-generated-content="">@mention-user</a>`
	assert.EqualValues(t, expected, newTestRenderUtils().RenderCommitMessageLinkSubject(testInput(), "https://example.com/link", testMetas))
}

func TestRenderIssueTitle(t *testing.T) {
	defer test.MockVariableValue(&markup.RenderBehaviorForTesting.DisableAdditionalAttributes, true)()
	expected := `  space @mention-user<SPACE><SPACE>
/just/a/path.bin
https://example.com/file.bin
[local link](file.bin)
[remote link](https://example.com)
[[local link|file.bin]]
[[remote link|https://example.com]]
![local image](image.jpg)
![remote image](https://example.com/image.jpg)
[[local image|image.jpg]]
[[remote link|https://example.com/image.jpg]]
https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash
com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb
com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
<span class="emoji" aria-label="thumbs up">👍</span>
mail@domain.com
@mention-user test
#123
  space<SPACE><SPACE>
`
	expected = strings.ReplaceAll(expected, "<SPACE>", " ")
	assert.EqualValues(t, expected, string(newTestRenderUtils().RenderIssueTitle(testInput(), nil)))
}

func TestRenderMarkdownToHtml(t *testing.T) {
	defer test.MockVariableValue(&markup.RenderBehaviorForTesting.DisableAdditionalAttributes, true)()
	expected := `<p>space <a href="/mention-user" rel="nofollow">@mention-user</a><br/>
/just/a/path.bin
<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a>
<a href="/file.bin" rel="nofollow">local link</a>
<a href="https://example.com" rel="nofollow">remote link</a>
<a href="/file.bin" rel="nofollow">local link</a>
<a href="https://example.com" rel="nofollow">remote link</a>
<a href="/image.jpg" target="_blank" rel="nofollow noopener"><img src="/image.jpg" alt="local image"/></a>
<a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a>
<a href="/image.jpg" rel="nofollow"><img src="/image.jpg" title="local image" alt="local image"/></a>
<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a>
<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a>
com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a>
com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
<span class="emoji" aria-label="thumbs up">👍</span>
<a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a>
<a href="/mention-user" rel="nofollow">@mention-user</a> test
#123
space</p>
`
	assert.Equal(t, expected, string(newTestRenderUtils().MarkdownToHtml(testInput())))
}

func TestRenderLabels(t *testing.T) {
	ut := newTestRenderUtils()
	label := &issues.Label{ID: 123, Name: "label-name", Color: "label-color"}
	issue := &issues.Issue{}
	expected := `/owner/repo/issues?labels=123`
	assert.Contains(t, ut.RenderLabels([]*issues.Label{label}, "/owner/repo", issue), expected)

	label = &issues.Label{ID: 123, Name: "label-name", Color: "label-color"}
	issue = &issues.Issue{IsPull: true}
	expected = `/owner/repo/pulls?labels=123`
	assert.Contains(t, ut.RenderLabels([]*issues.Label{label}, "/owner/repo", issue), expected)
}

func TestUserMention(t *testing.T) {
	markup.RenderBehaviorForTesting.DisableAdditionalAttributes = true
	rendered := newTestRenderUtils().MarkdownToHtml("@no-such-user @mention-user @mention-user")
	assert.EqualValues(t, `<p>@no-such-user <a href="/mention-user" rel="nofollow">@mention-user</a> <a href="/mention-user" rel="nofollow">@mention-user</a></p>`, strings.TrimSpace(string(rendered)))
}