package main

import (
	"context"
	"slices"
	"strings"
	"testing"
	"time"

	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
	"github.com/charmbracelet/x/ansi"
)

type recordingService struct {
	owner  string
	repo   string
	number int
}

func (s *recordingService) ListPullRequests(context.Context, string, string, int, bool) ([]PullRequest, error) {
	return nil, nil
}

func (s *recordingService) GetPullRequest(_ context.Context, owner, repo string, number int) (PRDetails, error) {
	s.owner, s.repo, s.number = owner, repo, number
	return PRDetails{PullRequest: PullRequest{
		Owner: owner, Repository: repo, RepoWithOwner: owner + "/" + repo, Number: number,
	}}, nil
}

func TestResolvedThreadsStartFolded(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10)
	m.screen = threadScreen
	m.details = PRDetails{PullRequest: PullRequest{Number: 7}}
	updated, _ := m.Update(detailsLoadedMsg{number: 7, details: PRDetails{
		PullRequest: PullRequest{Number: 7},
		Threads:     []ReviewThread{{ID: "open"}, {ID: "done", IsResolved: true}},
	}})
	got := updated.(App)
	if got.folded["open"] {
		t.Fatal("open thread was folded")
	}
	if !got.folded["done"] {
		t.Fatal("resolved thread was not folded")
	}
}

func TestResolvedThreadFoldingCanBeDisabled(t *testing.T) {
	settings := defaultAppSettings()
	settings.FoldResolved = false
	m := NewAppWithSettings(nil, "o", "r", false, 50, 10*time.Second, settings)
	m.screen = threadScreen
	m.details = PRDetails{PullRequest: PullRequest{Number: 7}}
	updated, _ := m.Update(detailsLoadedMsg{number: 7, details: PRDetails{
		PullRequest: PullRequest{Number: 7},
		Threads:     []ReviewThread{{ID: "done", IsResolved: true}},
	}})
	if updated.(App).folded["done"] {
		t.Fatal("resolved thread was folded despite configuration")
	}
}

func TestResolvedThreadIconTakesPrecedenceOverOutdated(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.details = PRDetails{Threads: []ReviewThread{{
		ID: "done", Path: "main.go", Line: 12, IsResolved: true, IsOutdated: true,
	}}}

	rendered := ansi.Strip(m.threadList(48, 10))
	if !strings.Contains(rendered, "✓ main.go") {
		t.Fatalf("resolved and outdated thread did not use check mark:\n%s", rendered)
	}
	if strings.Contains(rendered, "○ main.go") {
		t.Fatalf("outdated icon took precedence over resolved:\n%s", rendered)
	}
}

func TestSelectionSurvivesRefresh(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10)
	m.screen = threadScreen
	m.details = PRDetails{
		PullRequest: PullRequest{Number: 7},
		Threads:     []ReviewThread{{ID: "a"}, {ID: "b"}},
	}
	m.threadIndex = 1
	updated, _ := m.Update(detailsLoadedMsg{number: 7, details: PRDetails{
		PullRequest: PullRequest{Number: 7},
		Threads:     []ReviewThread{{ID: "new"}, {ID: "a"}, {ID: "b"}},
	}})
	if got := updated.(App).threadIndex; got != 2 {
		t.Fatalf("thread index = %d, want 2", got)
	}
}

func TestDefaultThreadOrderingUsesStatusThenFile(t *testing.T) {
	threads := []ReviewThread{
		{ID: "resolved-outdated", Path: "a.go", IsResolved: true, IsOutdated: true},
		{ID: "outdated", Path: "a.go", IsOutdated: true},
		{ID: "current-z", Path: "z.go"},
		{ID: "resolved", Path: "z.go", IsResolved: true},
		{ID: "current-a", Path: "a.go"},
	}
	settings := defaultAppSettings()
	sortReviewThreads(threads, settings.ThreadStatusOrder, settings.ThreadWithinStatus)
	got := make([]string, len(threads))
	for i, thread := range threads {
		got[i] = thread.ID
	}
	want := []string{"current-a", "current-z", "outdated", "resolved-outdated", "resolved"}
	if strings.Join(got, ",") != strings.Join(want, ",") {
		t.Fatalf("thread order = %v, want %v", got, want)
	}
}

func TestCustomThreadOrderingUsesOpeningTimestamp(t *testing.T) {
	base := time.Date(2026, 7, 1, 12, 0, 0, 0, time.UTC)
	threads := []ReviewThread{
		{ID: "current", Path: "a.go", Comments: []ReviewComment{{CreatedAt: base}}},
		{ID: "resolved-new", IsResolved: true, Path: "a.go", Comments: []ReviewComment{{CreatedAt: base.Add(2 * time.Hour)}}},
		{ID: "outdated", IsOutdated: true, Path: "a.go", Comments: []ReviewComment{{CreatedAt: base.Add(time.Hour)}}},
		{ID: "resolved-old", IsResolved: true, Path: "z.go", Comments: []ReviewComment{
			{CreatedAt: base.Add(3 * time.Hour)},
			{CreatedAt: base.Add(-time.Hour)},
		}},
	}
	sortReviewThreads(
		threads,
		[]string{"resolved", "outdated", "unresolved"},
		"timestamp",
	)
	got := make([]string, len(threads))
	for i, thread := range threads {
		got[i] = thread.ID
	}
	want := []string{"resolved-old", "resolved-new", "outdated", "current"}
	if strings.Join(got, ",") != strings.Join(want, ",") {
		t.Fatalf("thread order = %v, want %v", got, want)
	}
}

func TestPaneFocusAndNavigation(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen = threadScreen
	m.width, m.height = 100, 12
	m.details = PRDetails{
		PullRequest: PullRequest{Number: 7},
		Threads: []ReviewThread{
			{ID: "a", Path: "a.go", Comments: []ReviewComment{{Body: strings.Repeat("word ", 100)}}},
			{ID: "b", Path: "b.go"},
		},
	}

	updated, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("j")})
	m = updated.(App)
	if m.threadIndex != 1 {
		t.Fatalf("thread index = %d", m.threadIndex)
	}

	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("h")})
	m = updated.(App)
	if m.screen != threadScreen || m.focus != threadListPane {
		t.Fatal("h should focus the list without leaving the thread screen")
	}

	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("l")})
	m = updated.(App)
	if m.focus != threadDetailPane {
		t.Fatal("l did not focus the detail pane")
	}
}

func TestOpeningPullRequestShowsDashboardBeforeThreads(t *testing.T) {
	settings := defaultAppSettings()
	settings.DashboardMode = "intermediate"
	m := NewAppWithSettings(nil, "o", "r", false, 50, 10*time.Second, settings)
	m.prs = []PullRequest{{
		ID: "pr", Owner: "owner", Repository: "repo", RepoWithOwner: "owner/repo", Number: 9,
	}}
	updated, command := m.Update(tea.KeyMsg{Type: tea.KeyEnter})
	m = updated.(App)
	if m.screen != dashboardScreen || m.details.Number != 9 || command == nil {
		t.Fatalf("opening PR produced screen=%d number=%d command=%v", m.screen, m.details.Number, command)
	}

	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyEnter})
	m = updated.(App)
	if m.screen != threadScreen {
		t.Fatal("enter did not open review threads from dashboard")
	}
	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("b")})
	m = updated.(App)
	if m.screen != dashboardScreen {
		t.Fatal("b did not return from threads to dashboard")
	}
}

func TestDashboardHotkeyModeIsDefault(t *testing.T) {
	if got := defaultAppSettings().DashboardMode; got != "hotkey" {
		t.Fatalf("default dashboard mode = %q, want hotkey", got)
	}
	if got := defaultConfig().Display.DashboardMode; got != "hotkey" {
		t.Fatalf("default config dashboard mode = %q, want hotkey", got)
	}
}

func TestHotkeyDashboardModeOpensThreadsDirectly(t *testing.T) {
	settings := defaultAppSettings()
	settings.DashboardMode = "hotkey"
	m := NewAppWithSettings(nil, "o", "r", false, 50, 10*time.Second, settings)
	m.prs = []PullRequest{{
		ID: "pr", Owner: "owner", Repository: "repo", RepoWithOwner: "owner/repo", Number: 9,
	}}

	updated, command := m.Update(tea.KeyMsg{Type: tea.KeyEnter})
	m = updated.(App)
	if m.screen != threadScreen || command == nil {
		t.Fatalf("hotkey mode opened screen=%d command=%v", m.screen, command)
	}
	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("d")})
	m = updated.(App)
	if m.screen != dashboardScreen || m.dashboardReturn != threadScreen {
		t.Fatal("d did not open a dashboard that returns to threads")
	}
	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("b")})
	m = updated.(App)
	if m.screen != threadScreen {
		t.Fatal("dashboard did not return to the invoking thread screen")
	}
}

func TestDashboardHotkeyWorksFromPicker(t *testing.T) {
	settings := defaultAppSettings()
	settings.DashboardMode = "hotkey"
	m := NewAppWithSettings(nil, "o", "r", false, 50, 10*time.Second, settings)
	m.prs = []PullRequest{{
		ID: "pr", Owner: "owner", Repository: "repo", RepoWithOwner: "owner/repo", Number: 9,
	}}

	updated, command := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("d")})
	m = updated.(App)
	if m.screen != dashboardScreen || m.dashboardReturn != prScreen || command == nil {
		t.Fatalf("picker dashboard hotkey produced screen=%d return=%d", m.screen, m.dashboardReturn)
	}
}

func TestDashboardRendersDescriptionAndMetadata(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen = dashboardScreen
	m.width, m.height = 100, 40
	m.details = PRDetails{
		PullRequest: PullRequest{
			RepoWithOwner: "owner/repo", Number: 9, Title: "Improve dashboard",
			Author: "alice", URL: "https://github.com/owner/repo/pull/9",
			UpdatedAt: time.Date(2026, 7, 1, 12, 0, 0, 0, time.UTC),
		},
		Body:           "> Existing behavior\n\nUse `new_behavior` instead.",
		CreatedAt:      time.Date(2026, 6, 1, 12, 0, 0, 0, time.UTC),
		BaseRef:        "main",
		HeadRef:        "feature",
		ReviewDecision: "REVIEW_REQUIRED",
		CheckState:     "SUCCESS",
		MergeState:     "CLEAN",
		Assignees:      []string{"bob"},
		Reviewers:      []Reviewer{{Login: "carol", State: "APPROVED"}},
		Labels:         []string{"ui", "review"},
		Milestone:      "v2",
		Additions:      20,
		Deletions:      4,
		ChangedFiles:   3,
		CommitCount:    2,
		CommentCount:   5,
		HeadOID:        "0123456789abcdef",
		Checks:         []Check{{Name: "unit tests", State: "SUCCESS", URL: "https://checks/1"}},
		Reviews: []ReviewSummary{{
			ID: "review", Author: "dave", State: "APPROVED", Body: "Looks **good**.",
			SubmittedAt: time.Date(2026, 7, 1, 11, 0, 0, 0, time.UTC),
		}},
		Conversation: []PRComment{{
			ID: "comment", Author: "erin", Body: "Please retain `compatibility`.",
			CreatedAt: time.Date(2026, 7, 1, 10, 0, 0, 0, time.UTC),
		}},
		Permissions: ViewerPermissions{Repository: "WRITE", CanUpdatePR: true, CanResolveAny: true},
		Requirements: MergeRequirements{
			ApprovalsRequired: 1, RequiresApprovals: true,
			RequiresStatusChecks: true, RequiresConversation: true,
		},
		Threads: []ReviewThread{
			{ID: "open"},
			{ID: "old", IsOutdated: true},
			{ID: "done", IsResolved: true, IsOutdated: true},
		},
	}
	plain := ansi.Strip(strings.Join(m.dashboardLines(), "\n"))
	for _, wanted := range []string{
		"Improve dashboard", "@alice", "feature → main", "@bob", "@carol",
		"ui, review", "v2", "+20", "-4", "3 files", "2 commits",
		"1 open", "1 outdated", "1 resolved", "Description",
		"Existing behavior", "new_behavior", "unit tests", "Submitted reviews",
		"@dave", "Looks good", "Conversation", "@erin", "compatibility",
		"1 approval", "status checks", "resolved conversations", "write, update, resolve",
		"0123456",
	} {
		if !strings.Contains(plain, wanted) {
			t.Fatalf("dashboard is missing %q:\n%s", wanted, plain)
		}
	}
}

func TestDashboardCompactsSubmittedReviewsByDefault(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.width = 100
	m.details = PRDetails{
		PullRequest: PullRequest{RepoWithOwner: "o/r", Number: 1, Title: "PR"},
		BaseRef:     "main",
		Reviews: []ReviewSummary{
			{
				Author: "alice", State: "COMMENTED",
				Body:        "First line\n\nSecond **line**",
				SubmittedAt: time.Date(2099, 1, 2, 3, 4, 0, 0, time.UTC),
				CommitOID:   "abcdef0123456789",
			},
			{Author: "bob", State: "APPROVED", Body: "Ship it."},
		},
	}

	lines := m.dashboardLines()
	plain := make([]string, len(lines))
	for index, line := range lines {
		plain[index] = ansi.Strip(line)
	}
	alice := slices.IndexFunc(plain, func(line string) bool {
		return strings.Contains(line, "@alice") && strings.Contains(line, "First line Second line")
	})
	bob := slices.IndexFunc(plain, func(line string) bool {
		return strings.Contains(line, "@bob") && strings.Contains(line, "Ship it.")
	})
	if alice < 0 || bob != alice+1 {
		t.Fatalf("compact reviews are not adjacent one-line entries:\n%s", strings.Join(plain, "\n"))
	}
	joined := strings.Join(plain, "\n")
	if strings.Contains(joined, "2099-01-02") || strings.Contains(joined, "abcdef0") {
		t.Fatalf("compact reviews include timestamp or commit SHA:\n%s", joined)
	}
}

func TestDashboardAggregatesBodylessSubmittedReviews(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.width = 100
	reviews := make([]ReviewSummary, 0, 48)
	for range 40 {
		reviews = append(reviews, ReviewSummary{Author: "mhoff", State: "COMMENTED"})
	}
	for range 8 {
		reviews = append(reviews, ReviewSummary{Author: "Pablu23", State: "COMMENTED"})
	}
	m.details = PRDetails{
		PullRequest: PullRequest{RepoWithOwner: "o/r", Number: 1, Title: "PR"},
		BaseRef:     "main",
		Reviews:     reviews,
	}

	plain := ansi.Strip(strings.Join(m.dashboardLines(), "\n"))
	for _, wanted := range []string{"Submitted reviews (48)", "COMMENTED ×48", "@mhoff ×40", "@Pablu23 ×8"} {
		if !strings.Contains(plain, wanted) {
			t.Fatalf("compact review aggregate is missing %q:\n%s", wanted, plain)
		}
	}
	if strings.Count(plain, "@mhoff") != 1 || strings.Count(plain, "@Pablu23") != 1 ||
		strings.Count(plain, "COMMENTED") != 1 {
		t.Fatalf("body-less reviews were rendered individually:\n%s", plain)
	}
}

func TestDashboardCanExpandSubmittedReviews(t *testing.T) {
	settings := defaultAppSettings()
	settings.CompactReviews = false
	m := NewAppWithSettings(nil, "o", "r", false, 50, 10*time.Second, settings)
	m.width = 100
	m.details = PRDetails{
		PullRequest: PullRequest{RepoWithOwner: "o/r", Number: 1, Title: "PR"},
		BaseRef:     "main",
		Reviews: []ReviewSummary{{
			Author: "alice", State: "COMMENTED", Body: "First line\n\nSecond line",
			SubmittedAt: time.Date(2099, 1, 2, 3, 4, 0, 0, time.UTC),
			CommitOID:   "abcdef0123456789",
		}},
	}

	plain := ansi.Strip(strings.Join(m.dashboardLines(), "\n"))
	if !strings.Contains(plain, "2099-01-02") || !strings.Contains(plain, "abcdef0") ||
		!strings.Contains(plain, "First line") || !strings.Contains(plain, "Second line") {
		t.Fatalf("expanded review metadata or body missing:\n%s", plain)
	}
}

func TestThreadFilterCombinesPathStatusAuthorAndUpdates(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, time.Second)
	m.details.Threads = []ReviewThread{
		{ID: "match", Path: "src/generic_adder/rule.py", Comments: []ReviewComment{{Author: "Alice"}}},
		{ID: "wrong-status", Path: "src/generic_adder/rule.py", IsResolved: true, Comments: []ReviewComment{{Author: "Alice"}}},
		{ID: "wrong-author", Path: "src/generic_adder/rule.py", Comments: []ReviewComment{{Author: "Bob"}}},
	}
	m.updatedThreads["match"] = true
	m.searchQuery = "generic rule status:open author:ali updated:true"
	if got := m.matchingThreadIndices(); !slices.Equal(got, []int{0}) {
		t.Fatalf("combined filter matches = %v", got)
	}
}

func TestDetailRefreshKeepsLogicalCommentAnchored(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, time.Second)
	m.screen, m.width, m.height = threadScreen, 80, 6
	m.listHidden = true
	m.details = PRDetails{
		PullRequest: PullRequest{ID: "pr", Owner: "o", Repository: "r", Number: 1},
		Threads: []ReviewThread{{ID: "thread", Comments: []ReviewComment{
			{ID: "first", Author: "a", Body: "one"},
			{ID: "anchor", Author: "b", Body: "two"},
		}}},
	}
	for index, line := range m.detailLines(m.width) {
		if line.anchor == "comment:anchor:header" {
			m.scroll = index
			break
		}
	}
	refreshed := m.details
	refreshed.Threads = append([]ReviewThread(nil), m.details.Threads...)
	refreshed.Threads[0].Comments = append([]ReviewComment{{ID: "inserted", Author: "c", Body: "new"}}, refreshed.Threads[0].Comments...)
	updated, _ := m.Update(detailsLoadedMsg{owner: "o", repo: "r", number: 1, details: refreshed})
	m = updated.(App)
	if got := m.detailScrollAnchor(); got != "comment:anchor:header" {
		t.Fatalf("detail anchor after refresh = %q", got)
	}
}

func TestWriteCapabilityGateExplainsCachedAndPermissionStates(t *testing.T) {
	cached := writeCapabilities(PRDetails{FromCache: true}, nil)
	if cached[0].reason != "offline cached snapshot" || cached[0].authorized {
		t.Fatalf("cached capability = %#v", cached[0])
	}
	thread := &ReviewThread{ViewerCanReply: true}
	live := writeCapabilities(PRDetails{Permissions: ViewerPermissions{CanReact: true}}, thread)
	if !live[0].authorized || live[1].authorized || !live[2].authorized {
		t.Fatalf("live capabilities = %#v", live)
	}
}

func TestPollingMarksNewThreadCommentsUnread(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen = threadScreen
	initial := PRDetails{
		PullRequest: PullRequest{ID: "pr", Number: 1},
		Threads: []ReviewThread{{
			ID: "thread", Path: "a.go", Comments: []ReviewComment{{ID: "comment-1"}},
		}},
	}
	updated, _ := m.Update(detailsLoadedMsg{number: 1, details: initial})
	m = updated.(App)
	if m.unreadThreads["thread"] {
		t.Fatal("initial data was marked unread")
	}

	refreshed := initial
	refreshed.Threads = []ReviewThread{{
		ID: "thread", Path: "a.go",
		Comments: []ReviewComment{{ID: "comment-1"}, {ID: "comment-2"}},
	}}
	updated, _ = m.Update(detailsLoadedMsg{number: 1, details: refreshed})
	m = updated.(App)
	if !m.unreadThreads["thread"] {
		t.Fatal("new review comment was not marked unread")
	}
	plain := ansi.Strip(m.threadList(48, 10))
	if !strings.Contains(plain, "NEW") {
		t.Fatalf("thread list does not indicate unread update:\n%s", plain)
	}

	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("n")})
	m = updated.(App)
	if m.unreadThreads["thread"] {
		t.Fatal("visiting unread thread did not mark it read")
	}
}

func TestDashboardDescriptionScrolls(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen = dashboardScreen
	m.width, m.height = 60, 10
	m.details = PRDetails{
		PullRequest: PullRequest{RepoWithOwner: "owner/repo", Number: 1, Title: "Long", Author: "alice"},
		BaseRef:     "main",
		HeadRef:     "feature",
		Body:        strings.Repeat("A long description line.\n\n", 20),
	}
	updated, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("G")})
	m = updated.(App)
	if m.scroll == 0 || m.scroll != m.dashboardMaxScroll() {
		t.Fatalf("dashboard scroll = %d, max = %d", m.scroll, m.dashboardMaxScroll())
	}
}

func TestContextualHelpOpensAndClosesWithoutLeavingScreen(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen = threadScreen
	m.width, m.height = 70, 24

	updated, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("?")})
	m = updated.(App)
	if !m.helpVisible || m.screen != threadScreen {
		t.Fatal("? did not open thread help")
	}
	plain := ansi.Strip(m.View())
	if !strings.Contains(plain, "Review thread keys") ||
		!strings.Contains(plain, "Fuzzy-search file paths") ||
		strings.Contains(plain, "Next pull request") {
		t.Fatalf("help was not contextual:\n%s", plain)
	}

	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyEsc})
	m = updated.(App)
	if m.helpVisible || m.screen != threadScreen {
		t.Fatal("escape did not close help in place")
	}
}

func TestHelpCanScrollInShortTerminal(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen, m.helpVisible = threadScreen, true
	m.width, m.height = 46, 9

	updated, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("G")})
	m = updated.(App)
	if m.helpScroll != m.helpMaxScroll() || m.helpScroll == 0 {
		t.Fatalf("help scroll = %d, max = %d", m.helpScroll, m.helpMaxScroll())
	}
	plain := ansi.Strip(m.View())
	if !strings.Contains(plain, "Quit") {
		t.Fatalf("last help bindings are not reachable:\n%s", plain)
	}
	for i, line := range strings.Split(m.View(), "\n") {
		if got := ansi.StringWidth(line); got > m.width {
			t.Fatalf("help line %d width = %d, terminal width = %d", i, got, m.width)
		}
	}
}

func TestHelpWrapsLongActionsAndExplainsFilterClear(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen, m.width, m.height = threadScreen, 46, 20
	rows := m.helpRows(m.helpContentWidth())
	plain := strings.Join(strings.Fields(ansi.Strip(strings.Join(rows, "\n"))), " ")
	if !strings.Contains(plain, "Clear the active thread filter and show every thread") {
		t.Fatalf("F binding is not explained clearly:\n%s", plain)
	}
	if !strings.Contains(plain, "GitHub did not grant update permission") {
		t.Fatalf("long capability explanation was cut off:\n%s", plain)
	}
	for index, row := range rows {
		if width := ansi.StringWidth(row); width > m.helpContentWidth() {
			t.Fatalf("wrapped help row %d width = %d, content width = %d", index, width, m.helpContentWidth())
		}
	}
}

func TestUppercaseFClearsAppliedThreadFilter(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen = threadScreen
	m.searchQuery = "status:resolved author:alice"
	updated, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("F")})
	m = updated.(App)
	if m.searchQuery != "" {
		t.Fatalf("F left filter active: %q", m.searchQuery)
	}
}

func TestViewNeverExceedsTerminalWidth(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen = threadScreen
	m.width, m.height = 90, 18
	m.details = PRDetails{
		PullRequest: PullRequest{Number: 7, Title: strings.Repeat("title", 50)},
		Threads: []ReviewThread{{
			ID:   "a",
			Path: strings.Repeat("very-long-directory/", 8) + "important_filename.go",
			Comments: []ReviewComment{{
				DiffHunk: "@@ -1 +1 @@\n+" + strings.Repeat("reallyLongIdentifier", 20),
				Body:     strings.Repeat("comment ", 100),
			}},
		}},
	}

	for i, line := range strings.Split(m.View(), "\n") {
		if got := ansi.StringWidth(line); got > m.width {
			t.Fatalf("line %d width = %d, terminal width = %d", i, got, m.width)
		}
	}
}

func TestTruncatePathPreservesFilename(t *testing.T) {
	got := truncatePath("a/very/long/directory/important_filename.go", 22)
	if !strings.HasSuffix(got, "important_filename.go") {
		t.Fatalf("truncated path %q lost filename", got)
	}
}

func TestConfiguredPathScrollingAdvances(t *testing.T) {
	settings := defaultAppSettings()
	settings.PathScroll = true
	settings.PathScrollInterval = 100 * time.Millisecond
	m := NewAppWithSettings(nil, "o", "r", false, 50, 10*time.Second, settings)
	m.screen = threadScreen
	updated, _ := m.Update(pathTickMsg(time.Now()))
	if got := updated.(App).pathScrollStep; got != 1 {
		t.Fatalf("path scroll step = %d, want 1", got)
	}

	path := "internal/review/threads/important_filename.go"
	if beginning := scrollingPath(path, 18, 0); !strings.HasPrefix(beginning, "internal/") {
		t.Fatalf("scroll beginning = %q", beginning)
	}
	if end := scrollingPath(path, 18, 1000); ansi.StringWidth(end) != 18 {
		t.Fatalf("scroll output has width %d", ansi.StringWidth(end))
	}
}

func TestConfiguredThreadListWidth(t *testing.T) {
	settings := defaultAppSettings()
	settings.ThreadListWidthPercent = 50
	m := NewAppWithSettings(nil, "o", "r", false, 50, 10*time.Second, settings)
	m.width = 120
	if got := m.threadListWidth(); got != 60 {
		t.Fatalf("thread list width = %d, want 60", got)
	}
}

func TestFuzzyFileSearchRanksAndFiltersPaths(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.searchQuery = "svcusr"
	m.details = PRDetails{Threads: []ReviewThread{
		{Path: "docs/review-user.md"},
		{Path: "internal/service/user.go"},
		{Path: "internal/service/team.go"},
	}}

	matches := m.matchingThreadIndices()
	if len(matches) != 1 {
		t.Fatalf("matches = %v, want one fuzzy match", matches)
	}
	if matches[0] != 1 {
		t.Fatalf("best match = %q, want internal/service/user.go", m.details.Threads[matches[0]].Path)
	}
}

func TestFuzzyFileSearchSupportsSpaceSeparatedTerms(t *testing.T) {
	path := "logprep/ng/processor/generic_adder/rule.py"
	if _, ok := fuzzyPathScore(path, "ng generic_adder rule"); !ok {
		t.Fatalf("space-separated query did not match %q", path)
	}
	if _, ok := fuzzyPathScore(path, "ng generic_adder missing"); ok {
		t.Fatalf("query matched despite a missing term")
	}

	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen, m.searching, m.searchQuery = threadScreen, true, "ng"
	updated, _ := m.Update(tea.KeyMsg{Type: tea.KeySpace, Runes: []rune{' '}})
	if got := updated.(App).searchQuery; got != "ng " {
		t.Fatalf("space key produced search query %q", got)
	}
}

func TestFileSearchCanJumpOrCancel(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen = threadScreen
	m.threadIndex = 1
	m.details = PRDetails{Threads: []ReviewThread{
		{Path: "cmd/main.go"},
		{Path: "internal/api/client.go"},
	}}

	updated, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("/")})
	m = updated.(App)
	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("cmd")})
	m = updated.(App)
	if !m.searching || m.threadIndex != 0 {
		t.Fatalf("search did not select cmd/main.go: searching=%v index=%d", m.searching, m.threadIndex)
	}
	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyEsc})
	m = updated.(App)
	if m.searching || m.threadIndex != 1 {
		t.Fatalf("cancel did not restore original selection: searching=%v index=%d", m.searching, m.threadIndex)
	}

	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("/")})
	m = updated.(App)
	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("cmd")})
	m = updated.(App)
	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyEnter})
	m = updated.(App)
	if m.searching || m.threadIndex != 0 {
		t.Fatalf("enter did not keep search jump: searching=%v index=%d", m.searching, m.threadIndex)
	}
}

func TestMergeReadyRequiresApproval(t *testing.T) {
	notApproved := reviewAndMergeState(PRDetails{Mergeable: "MERGEABLE", ReviewDecision: "REVIEW_REQUIRED"})
	if strings.Contains(notApproved, "merge: ready") {
		t.Fatalf("unapproved PR shown as ready: %q", notApproved)
	}
	approved := reviewAndMergeState(PRDetails{Mergeable: "MERGEABLE", ReviewDecision: "APPROVED"})
	if !strings.Contains(approved, "merge: ready") {
		t.Fatalf("approved PR not shown as ready: %q", approved)
	}
	unresolved := reviewAndMergeState(PRDetails{
		Mergeable: "MERGEABLE", ReviewDecision: "APPROVED",
		Requirements: MergeRequirements{RequiresConversation: true},
		Threads:      []ReviewThread{{ID: "open"}},
	})
	if !strings.Contains(unresolved, "unresolved conversations") {
		t.Fatalf("required unresolved conversation did not block merge: %q", unresolved)
	}
	failing := reviewAndMergeState(PRDetails{
		Mergeable: "MERGEABLE", ReviewDecision: "APPROVED", CheckState: "FAILURE",
		Requirements: MergeRequirements{RequiresStatusChecks: true},
	})
	if !strings.Contains(failing, "checks failing") {
		t.Fatalf("required failing checks did not block merge: %q", failing)
	}
}

func TestThreadCommentCountsUseSameColumn(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.width, m.height = 100, 20
	m.details = PRDetails{Threads: []ReviewThread{
		{ID: "short", Path: "a.go", Line: 12, Comments: make([]ReviewComment, 2)},
		{ID: "long", Path: "a/very/long/directory/with/a/descriptive/important_filename.go", Line: 12, Comments: make([]ReviewComment, 2)},
	}}
	plain := ansi.Strip(m.threadList(48, 10))
	var columns []int
	for _, line := range strings.Split(plain, "\n") {
		if column := strings.Index(line, "· 2"); column >= 0 {
			columns = append(columns, ansi.StringWidth(line[:column]))
		}
	}
	if len(columns) != 2 || columns[0] != columns[1] {
		t.Fatalf("comment columns = %v\n%s", columns, plain)
	}
}

func TestReviewAnchorUsesCommentSnapshotCoordinates(t *testing.T) {
	thread := ReviewThread{
		Line:      150,
		StartLine: 148,
		Comments: []ReviewComment{{
			Line:              150,
			StartLine:         148,
			OriginalLine:      42,
			OriginalStartLine: 40,
			Outdated:          true,
		}},
	}
	start, end := reviewAnchor(thread)
	if start != 40 || end != 42 {
		t.Fatalf("anchor = %d-%d, want original snapshot range 40-42", start, end)
	}
}

func TestOutdatedDetailHighlightsOriginalCodeRange(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.width = 100
	m.details = PRDetails{Threads: []ReviewThread{{
		Path:       "main.go",
		Line:       150,
		StartLine:  148,
		DiffSide:   "RIGHT",
		IsOutdated: true,
		Comments: []ReviewComment{{
			DiffHunk:          "@@ -38,7 +38,7 @@\n old 38\n old 39\n reviewed 40\n reviewed 41\n reviewed 42\n old 43\n old 44",
			OriginalLine:      42,
			OriginalStartLine: 40,
			OriginalCommitOID: "0123456789abcdef",
		}},
	}}}

	var rendered strings.Builder
	selected := 0
	for _, line := range m.detailLines(80) {
		rendered.WriteString(ansi.Strip(line.fixed + line.text))
		rendered.WriteByte('\n')
		if line.selected {
			selected++
		}
	}
	output := rendered.String()
	if selected != 3 || !strings.Contains(output, "reviewed 40") ||
		!strings.Contains(output, "snapshot 0123456") {
		t.Fatalf("detail was not anchored to the original snapshot:\n%s", output)
	}
}

func TestTabHidesListAndHRestoresIt(t *testing.T) {
	m := NewApp(nil, "o", "r", false, 50, 10*time.Second)
	m.screen = threadScreen
	m.width, m.height = 100, 20

	updated, _ := m.Update(tea.KeyMsg{Type: tea.KeyTab})
	m = updated.(App)
	if !m.listHidden || m.focus != threadDetailPane {
		t.Fatal("tab did not hide the list and focus detail")
	}

	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("h")})
	m = updated.(App)
	if m.listHidden || m.focus != threadListPane {
		t.Fatal("h did not reveal and focus the list")
	}
}

func TestSelectedBackgroundFillsLine(t *testing.T) {
	rendered := selectedBackground("code", 12)
	if !strings.Contains(rendered, "\x1b[48;5;24m") || ansi.StringWidth(rendered) != 12 {
		t.Fatalf("selected background was not full width: %q", rendered)
	}
}

func TestWrappedDiffContinuationKeepsIndentWithoutLineNumber(t *testing.T) {
	original := "    some_really_long_function_call(argument)"
	lines := wrapDiffLine(highlightedDiffLine{
		gutter:   "   10 + ",
		code:     original,
		selected: true,
	}, 22)
	if len(lines) < 2 {
		t.Fatalf("long code was not wrapped: %#v", lines)
	}

	for i, line := range lines {
		if ansi.StringWidth(line.fixed+line.text) > 22 {
			t.Fatalf("wrapped line %d exceeds width: %q", i, line.fixed+line.text)
		}
		if !line.selected {
			t.Fatalf("continuation line %d lost selection state", i)
		}
		if i == 0 {
			if !strings.Contains(line.fixed, "10") {
				t.Fatalf("first line lost its line number: %q", line.fixed)
			}
			continue
		}
		if strings.TrimSpace(line.fixed) != "" {
			t.Fatalf("continuation repeated a line number: %q", line.fixed)
		}
		plain := ansi.Strip(line.text)
		if !strings.HasPrefix(plain, "      ↳ ") {
			t.Fatalf("continuation lacks extra indent and marker: %q", plain)
		}
	}
}

func TestCodeWrapPrefersSyntaxBoundaries(t *testing.T) {
	code := "    result = client.fetch(first_argument, second_argument)"
	lines := wrapCodeWithIndent(code, 38)
	if len(lines) < 2 {
		t.Fatalf("code was not wrapped: %#v", lines)
	}
	plain := make([]string, len(lines))
	for i, line := range lines {
		plain[i] = ansi.Strip(line)
	}
	rendered := strings.Join(plain, "\n")
	if !strings.Contains(rendered, "first_argument") || !strings.Contains(rendered, "second_argument") {
		t.Fatalf("wrapper split identifiers despite syntax boundaries:\n%s", rendered)
	}
	if !strings.Contains(rendered, "↳ ") {
		t.Fatalf("continuation marker missing:\n%s", rendered)
	}
}

func TestAuthorColorsAreVariedAndDeterministic(t *testing.T) {
	if authorColor("Alice") != authorColor("alice") {
		t.Fatal("same login received different colors")
	}
	colors := map[lipgloss.Color]bool{}
	for _, login := range []string{"alice", "bob", "carol", "dave", "eve", "frank"} {
		colors[authorColor(login)] = true
	}
	if len(colors) < 2 {
		t.Fatalf("author palette did not vary: %#v", colors)
	}
}

func TestGroupedPRRowsAddsRepositoryHeadings(t *testing.T) {
	prs := []PullRequest{
		{RepoWithOwner: "alpha/one", Number: 1},
		{RepoWithOwner: "alpha/one", Number: 2},
		{RepoWithOwner: "beta/two", Number: 1},
	}
	rows, selectedRow := groupedPRRows(prs, 2)
	if len(rows) != 5 {
		t.Fatalf("row count = %d, want 5: %#v", len(rows), rows)
	}
	if !rows[0].header || rows[0].repository != "alpha/one" ||
		!rows[3].header || rows[3].repository != "beta/two" {
		t.Fatalf("repository headings are incorrect: %#v", rows)
	}
	if selectedRow != 4 || rows[selectedRow].prIndex != 2 {
		t.Fatalf("selected row = %d, want PR row 4", selectedRow)
	}
}

func TestDetailsLoadUsesSelectedPRRepository(t *testing.T) {
	service := &recordingService{}
	m := NewApp(service, "", "", false, 50, 10*time.Second)
	pr := PullRequest{Owner: "other-owner", Repository: "other-repo", Number: 17}
	msg := m.loadDetails(pr, false)().(detailsLoadedMsg)

	if service.owner != pr.Owner || service.repo != pr.Repository || service.number != pr.Number {
		t.Fatalf("detail request used %s/%s#%d", service.owner, service.repo, service.number)
	}
	if msg.owner != pr.Owner || msg.repo != pr.Repository || msg.number != pr.Number {
		t.Fatalf("detail response identity = %s/%s#%d", msg.owner, msg.repo, msg.number)
	}
}

func TestPeopleMetadataUsesColoredHandles(t *testing.T) {
	assignees := handlesText([]string{"alice"})
	reviewers := reviewersText([]Reviewer{{Login: "bob", State: "APPROVED"}})
	if ansi.Strip(assignees) != "@alice" || ansi.Strip(reviewers) != "@bob (approved)" {
		t.Fatalf("people metadata = %q / %q", ansi.Strip(assignees), ansi.Strip(reviewers))
	}
	if authorStyle("alice").GetForeground() != authorColor("alice") ||
		authorStyle("bob").GetForeground() != authorColor("bob") {
		t.Fatal("people handles do not use the deterministic author color")
	}
}