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

package devtest

import (
	"fmt"
	"html/template"
	"net/http"
	"path"
	"strconv"
	"strings"
	"time"
	"unicode"

	"gitea.dev/models/asymkey"
	"gitea.dev/models/db"
	"gitea.dev/models/gituser"
	user_model "gitea.dev/models/user"
	"gitea.dev/modules/badge"
	"gitea.dev/modules/charset"
	"gitea.dev/modules/git"
	"gitea.dev/modules/indexer/code"
	"gitea.dev/modules/templates"
	"gitea.dev/modules/util"
	"gitea.dev/services/context"
)

// List all devtest templates, they will be used for e2e tests for the UI components
func List(ctx *context.Context) {
	templateNames, err := templates.AssetFS().ListFiles("devtest", true)
	if err != nil {
		ctx.ServerError("AssetFS().ListFiles", err)
		return
	}
	var subNames []string
	for _, tmplName := range templateNames {
		subName := strings.TrimSuffix(tmplName, ".tmpl")
		if !strings.HasPrefix(subName, "devtest-") {
			subNames = append(subNames, subName)
		}
	}
	ctx.Data["SubNames"] = subNames
	ctx.HTML(http.StatusOK, "devtest/devtest-list")
}

func FetchActionTest(ctx *context.Context) {
	_ = ctx.Req.ParseForm()
	ctx.Flash.Info("fetch action: " + ctx.Req.Method + " " + ctx.Req.RequestURI + "\n" +
		"Form: " + ctx.Req.Form.Encode() + "\n" +
		"PostForm: " + ctx.Req.PostForm.Encode(),
	)
	time.Sleep(2 * time.Second)
	ctx.JSONRedirect("")
}

func prepareMockDataGiteaUI(_ *context.Context) {}

func prepareMockDataBadgeCommitSign(ctx *context.Context) {
	var commits []*asymkey.SignCommit
	mockUsers, _ := db.Find[user_model.User](ctx, user_model.SearchUserOptions{ListOptions: db.ListOptions{PageSize: 1}})
	mockUser := mockUsers[0]
	commits = append(commits, &asymkey.SignCommit{
		Verification: &asymkey.CommitVerification{},
		UserCommit: &gituser.UserCommit{
			GitCommit: &git.Commit{ID: git.Sha1ObjectFormat.EmptyObjectID()},
		},
	})
	commits = append(commits, &asymkey.SignCommit{
		Verification: &asymkey.CommitVerification{
			Verified:    true,
			Reason:      "name / key-id",
			SigningUser: mockUser,
			SigningKey:  &asymkey.GPGKey{KeyID: "12345678"},
			TrustStatus: "trusted",
		},
		UserCommit: &gituser.UserCommit{
			AuthorUser: mockUser,
			GitCommit:  &git.Commit{ID: git.Sha1ObjectFormat.EmptyObjectID()},
		},
	})
	commits = append(commits, &asymkey.SignCommit{
		Verification: &asymkey.CommitVerification{
			Verified:      true,
			Reason:        "name / key-id",
			SigningUser:   mockUser,
			SigningSSHKey: &asymkey.PublicKey{Fingerprint: "aa:bb:cc:dd:ee"},
			TrustStatus:   "untrusted",
		},
		UserCommit: &gituser.UserCommit{
			AuthorUser: mockUser,
			GitCommit:  &git.Commit{ID: git.Sha1ObjectFormat.EmptyObjectID()},
		},
	})
	commits = append(commits, &asymkey.SignCommit{
		Verification: &asymkey.CommitVerification{
			Verified:      true,
			Reason:        "name / key-id",
			SigningUser:   mockUser,
			SigningSSHKey: &asymkey.PublicKey{Fingerprint: "aa:bb:cc:dd:ee"},
			TrustStatus:   "other(unmatch)",
		},
		UserCommit: &gituser.UserCommit{
			AuthorUser: mockUser,
			GitCommit:  &git.Commit{ID: git.Sha1ObjectFormat.EmptyObjectID()},
		},
	})
	commits = append(commits, &asymkey.SignCommit{
		Verification: &asymkey.CommitVerification{
			Warning:      true,
			Reason:       "gpg.error",
			SigningEmail: "test@example.com",
		},
		UserCommit: &gituser.UserCommit{
			AuthorUser: mockUser,
			GitCommit:  &git.Commit{ID: git.Sha1ObjectFormat.EmptyObjectID()},
		},
	})

	ctx.Data["MockCommits"] = commits
}

func prepareMockDataBadgeActionsSvg(ctx *context.Context) {
	fontFamilyNames := strings.Split(badge.DefaultFontFamily, ",")
	selectedFontFamilyName := ctx.FormString("font", fontFamilyNames[0])
	selectedStyle := ctx.FormString("style", badge.DefaultStyle)
	var badges []badge.Badge
	badges = append(badges, badge.GenerateBadge("啊啊啊啊啊啊啊啊啊啊啊啊", "🌞🌞🌞🌞🌞", "green"))
	for r := range rune(256) {
		if unicode.IsPrint(r) {
			s := strings.Repeat(string(r), 15)
			badges = append(badges, badge.GenerateBadge(s, util.TruncateRunes(s, 7), "green"))
		}
	}

	var badgeSVGs []template.HTML
	for i, b := range badges {
		b.IDPrefix = "devtest-" + strconv.FormatInt(int64(i), 10) + "-"
		b.FontFamily = selectedFontFamilyName
		var h template.HTML
		var err error
		switch selectedStyle {
		case badge.StyleFlat:
			h, err = ctx.RenderToHTML("shared/actions/runner_badge_flat", map[string]any{"Badge": b})
		case badge.StyleFlatSquare:
			h, err = ctx.RenderToHTML("shared/actions/runner_badge_flat-square", map[string]any{"Badge": b})
		default:
			err = fmt.Errorf("unknown badge style: %s", selectedStyle)
		}
		if err != nil {
			ctx.ServerError("RenderToHTML", err)
			return
		}
		badgeSVGs = append(badgeSVGs, h)
	}
	ctx.Data["BadgeSVGs"] = badgeSVGs
	ctx.Data["BadgeFontFamilyNames"] = fontFamilyNames
	ctx.Data["SelectedFontFamilyName"] = selectedFontFamilyName
	ctx.Data["BadgeStyles"] = badge.GlobalVars().AllStyles
	ctx.Data["SelectedStyle"] = selectedStyle
}

func prepareMockDataAvatarStack(ctx *context.Context) {
	/*
		mockUsers, _ := db.Find[user_model.User](ctx, user_model.SearchUserOptions{ListOptions: db.ListOptions{PageSize: 3}})
		if len(mockUsers) == 0 {
			return
		}
		u0 := mockUsers[0]
		u1, u2 := u0, u0
		if len(mockUsers) >= 2 {
			u1 = mockUsers[1]
		}
		if len(mockUsers) >= 3 {
			u2 = mockUsers[2]
		}

		authorSig := func(u *user_model.User) *git.Signature {
			return &git.Signature{Name: u.Name, Email: u.Email}
		}
		coLinked := func(u *user_model.User) *gituser.CommitParticipant {
			return &gituser.CommitParticipant{GiteaUser: u, GitIdentity: authorSig(u)}
		}
		coUnlinked := func(name, email string) *gituser.CommitParticipant {
			return &gituser.CommitParticipant{GitIdentity: &git.Signature{Name: name, Email: email}}
		}
		nUnlinked := func(n int) []*gituser.CommitParticipant {
			out := make([]*gituser.CommitParticipant, n)
			for i := range out {
				out[i] = coUnlinked(fmt.Sprintf("Contributor %d", i+1), fmt.Sprintf("contrib%d@example.com", i+1))
			}
			return out
		}

		type scenario struct {
			Label string
			Data  *gituser.AvatarStackData
		}
		mk := gituser.BuildAvatarStackData()
		extSig := &git.Signature{Name: "External Contributor", Email: "external@example.com"}
		ctx.Data["AvatarStackScenarios"] = []scenario{
			{Label: "linked author, no co-authors", Data: mk(u0, authorSig(u0), nil)},
			{Label: "unlinked author, no co-authors", Data: mk(nil, extSig, nil)},
			{Label: "1 linked co-author", Data: mk(u0, authorSig(u0), []*gituser.CommitParticipant{coLinked(u1)})},
			{Label: "1 unlinked co-author", Data: mk(u0, authorSig(u0), []*gituser.CommitParticipant{coUnlinked("Bob Smith", "bob@example.com")})},
			{Label: "2 co-authors (3 people), u1 author", Data: mk(u1, authorSig(u1), []*gituser.CommitParticipant{coLinked(u0), coUnlinked("Bob Smith", "bob@example.com")})},
			{Label: "3 co-authors mixed (4 people)", Data: mk(u0, authorSig(u0), []*gituser.CommitParticipant{coLinked(u1), coLinked(u2), coUnlinked("Bob Smith", "bob@example.com")})},
			{Label: "9 co-authors (max visible, no overflow), u2 author", Data: mk(u2, authorSig(u2), nUnlinked(9))},
			{Label: "10 co-authors (overflow +1)", Data: mk(u0, authorSig(u0), nUnlinked(10))},
			{Label: "15 co-authors (overflow +6), unlinked author", Data: mk(nil, extSig, nUnlinked(15))},
			{Label: "30 co-authors (overflow +21)", Data: mk(u0, authorSig(u0), nUnlinked(30))},
		}
	*/
}

func prepareMockDataRelativeTime(ctx *context.Context) {
	now := time.Now()
	ctx.Data["TimeNow"] = now
	ctx.Data["TimePast5s"] = now.Add(-5 * time.Second)
	ctx.Data["TimeFuture5s"] = now.Add(5 * time.Second)
	ctx.Data["TimePast2m"] = now.Add(-2 * time.Minute)
	ctx.Data["TimeFuture2m"] = now.Add(2 * time.Minute)
	ctx.Data["TimePast3m"] = now.Add(-3 * time.Minute)
	ctx.Data["TimePast1h"] = now.Add(-1 * time.Hour)
	ctx.Data["TimePast3h"] = now.Add(-3 * time.Hour)
	ctx.Data["TimePast1d"] = now.Add(-24 * time.Hour)
	ctx.Data["TimePast2d"] = now.Add(-2 * 24 * time.Hour)
	ctx.Data["TimePast3d"] = now.Add(-3 * 24 * time.Hour)
	ctx.Data["TimePast26h"] = now.Add(-26 * time.Hour)
	ctx.Data["TimePast40d"] = now.Add(-40 * 24 * time.Hour)
	ctx.Data["TimePast60d"] = now.Add(-60 * 24 * time.Hour)
	ctx.Data["TimePast1y"] = now.Add(-366 * 24 * time.Hour)
	ctx.Data["TimeFuture1h"] = now.Add(1 * time.Hour)
	ctx.Data["TimeFuture3h"] = now.Add(3 * time.Hour)
	ctx.Data["TimeFuture3d"] = now.Add(3 * 24 * time.Hour)
	ctx.Data["TimeFuture1y"] = now.Add(366 * 24 * time.Hour)
}

func prepareMockData(ctx *context.Context) {
	switch ctx.Req.URL.Path {
	case "/devtest/gitea-ui":
		prepareMockDataGiteaUI(ctx)
	case "/devtest/badge-commit-sign":
		prepareMockDataBadgeCommitSign(ctx)
	case "/devtest/badge-actions-svg":
		prepareMockDataBadgeActionsSvg(ctx)
	case "/devtest/relative-time":
		prepareMockDataRelativeTime(ctx)
	case "/devtest/toast-and-message":
		prepareMockDataToastAndMessage(ctx)
	case "/devtest/unicode-escape":
		prepareMockDataUnicodeEscape(ctx)
	case "/devtest/avatar-stack":
		prepareMockDataAvatarStack(ctx)
	}
}

func prepareMockDataToastAndMessage(ctx *context.Context) {
	msgWithDetails, _ := ctx.RenderToHTML("base/alert_details", map[string]any{
		"Message": "message with details <script>escape xss</script>",
		"Summary": "summary with details",
		"Details": "details line 1\n details line 2\n details line 3",
	})
	msgWithSummary, _ := ctx.RenderToHTML("base/alert_details", map[string]any{
		"Message": "message with summary <script>escape xss</script>",
		"Summary": "summary only",
	})

	ctx.Flash.ErrorMsg = string(msgWithDetails)
	ctx.Flash.WarningMsg = string(msgWithSummary)
	ctx.Flash.InfoMsg = "a long message with line break\nthe second line <script>removed xss</script>"
	ctx.Flash.SuccessMsg = "single line message <script>removed xss</script>"
	ctx.Data["Flash"] = ctx.Flash
}

func prepareMockDataUnicodeEscape(ctx *context.Context) {
	content := "// demo code\n"
	content += "if accessLevel != \"user\u202E \u2066// Check if admin (invisible char)\u2069 \u2066\" { }\n"
	content += "if O𝐾 { } // ambiguous char\n"
	content += "if O𝐾 && accessLevel != \"user\u202E \u2066// ambiguous char + invisible char\u2069 \u2066\" { }\n"
	content += "str := `\xef` // broken char\n"
	content += "str := `\x00 \x19 \x7f` // control char\n"

	lineNums := []int{1, 2, 3, 4, 5, 6, 7, 8, 9}

	highlightLines := code.HighlightSearchResultCode("demo.go", "", lineNums, content)
	escapeStatus := &charset.EscapeStatus{}
	lineEscapeStatus := make([]*charset.EscapeStatus, len(highlightLines))
	for i, hl := range highlightLines {
		lineEscapeStatus[i], hl.FormattedContent = charset.EscapeControlHTML(hl.FormattedContent, ctx.Locale)
		escapeStatus = escapeStatus.Or(lineEscapeStatus[i])
	}
	ctx.Data["HighlightLines"] = highlightLines
	ctx.Data["EscapeStatus"] = escapeStatus
	ctx.Data["LineEscapeStatus"] = lineEscapeStatus
}

func TmplCommon(ctx *context.Context) {
	prepareMockData(ctx)
	if ctx.Req.Method == http.MethodPost && ctx.FormBool("mock_response_delay") {
		ctx.Flash.Info("form submit: "+ctx.Req.Method+" "+ctx.Req.RequestURI+"\n"+
			"Form: "+ctx.Req.Form.Encode()+"\n"+
			"PostForm: "+ctx.Req.PostForm.Encode(),
			true,
		)
		time.Sleep(2 * time.Second)
	}
	ctx.HTML(http.StatusOK, templates.TplName("devtest"+path.Clean("/"+ctx.PathParam("sub"))))
}