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package app

import (
	"os"
	"path/filepath"
	"strings"
	"testing"

	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
	"glint/internal/editor"
)

func statusApp() *App {
	a := newApp()
	a.width = 120
	a.height = 24
	return a
}

func TestStatusBarShowsLnCol(t *testing.T) {
	a := statusApp()
	a.editor.SetContent([]byte("hello\nworld"))
	a.editor.Cursor = editor.Position{Row: 1, Col: 2}
	if got := a.statusBar(); !strings.Contains(got, "Ln 2:3") {
		t.Fatalf("status bar missing Ln 2:3:\n%s", got)
	}
}

func TestStatusBarShowsWordCount(t *testing.T) {
	a := statusApp()
	a.editor.SetContent([]byte("one two three"))
	if got := a.statusBar(); !strings.Contains(got, "3 words") {
		t.Fatalf("status bar missing word count:\n%s", got)
	}
}

func TestStatusBarShowsThemeName(t *testing.T) {
	a := statusApp()
	if got := a.statusBar(); !strings.Contains(got, a.theme.Name) {
		t.Fatalf("status bar missing theme %q:\n%s", a.theme.Name, got)
	}
}

func TestStatusBarShowsHelpIndicator(t *testing.T) {
	a := statusApp()
	if got := a.statusBar(); !strings.Contains(got, "?") {
		t.Fatalf("status bar missing help indicator:\n%s", got)
	}
}

func TestStatusBarShowsSelectionStats(t *testing.T) {
	a := statusApp()
	a.editor.SetContent([]byte("one two three"))
	for i := 0; i < 7; i++ { // select "one two" via Shift+Right
		a.editor.HandleKey(tea.KeyMsg{Type: tea.KeyShiftRight})
	}
	got := a.statusBar()
	if !strings.Contains(got, "7 chars") || !strings.Contains(got, "2 words selected") {
		t.Fatalf("status bar missing selection stats:\n%s", got)
	}
}

func TestRepoOrParentReturnsRepoName(t *testing.T) {
	root := t.TempDir()
	repo := filepath.Join(root, "myrepo")
	sub := filepath.Join(repo, "notes")
	if err := os.MkdirAll(filepath.Join(repo, ".git"), 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.MkdirAll(sub, 0o755); err != nil {
		t.Fatal(err)
	}
	got := repoOrParent(filepath.Join(sub, "n.md"))
	if got != "myrepo" {
		t.Fatalf("repoOrParent = %q, want %q", got, "myrepo")
	}
}

func TestRepoOrParentFallsBackToParent(t *testing.T) {
	root := t.TempDir()
	dir := filepath.Join(root, "plainfolder")
	if err := os.MkdirAll(dir, 0o755); err != nil {
		t.Fatal(err)
	}
	got := repoOrParent(filepath.Join(dir, "n.md"))
	if got != "plainfolder" {
		t.Fatalf("repoOrParent = %q, want %q", got, "plainfolder")
	}
}

func TestStatusBarNarrowNoOverflow(t *testing.T) {
	a := statusApp()
	a.width = 20
	a.editor.SetContent([]byte("one two three four five"))
	a.editor.Cursor = editor.Position{Row: 0, Col: 3}
	for _, line := range strings.Split(a.statusBar(), "\n") {
		if w := lipgloss.Width(line); w > 20 {
			t.Fatalf("status line width %d > 20: %q", w, line)
		}
	}
}

func TestEscClearsSelection(t *testing.T) {
	a := statusApp()
	a.editor.SetContent([]byte("hello world"))
	for i := 0; i < 5; i++ { // select "hello" with Shift+Right
		a.editor.HandleKey(tea.KeyMsg{Type: tea.KeyShiftRight})
	}
	if !a.editor.HasSelection() {
		t.Fatal("setup: expected a selection")
	}
	a.handleKey(tea.KeyMsg{Type: tea.KeyEsc})
	if a.editor.HasSelection() {
		t.Fatal("Esc should clear the selection")
	}
	if a.mode != ModeEditor {
		t.Fatalf("mode = %v, want ModeEditor", a.mode)
	}
}