package main

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

	tea "github.com/charmbracelet/bubbletea"
)

func TestNewModelWithoutTodos(t *testing.T) {
	project := t.TempDir()
	app, err := newModel(project)
	if err != nil {
		t.Fatal(err)
	}
	if app.todosDir != filepath.Join(project, ".pi", "todos") || app.count != 0 {
		t.Fatalf("unexpected model: %+v", app)
	}
	if !strings.Contains(app.View(), "No todos yet") {
		t.Fatalf("missing empty state: %s", app.View())
	}
}

func TestNewModelWithTodos(t *testing.T) {
	project := t.TempDir()
	dir := filepath.Join(project, ".pi", "todos")
	if err := os.MkdirAll(dir, 0700); err != nil {
		t.Fatal(err)
	}
	for _, name := range []string{"a.md", "b.md", "settings.json"} {
		if err := os.WriteFile(filepath.Join(dir, name), nil, 0600); err != nil {
			t.Fatal(err)
		}
	}
	app, err := newModel(project)
	if err != nil || app.count != 2 {
		t.Fatalf("unexpected result: %+v, %v", app, err)
	}
}

func TestInvalidProjectAndTodoPath(t *testing.T) {
	project := t.TempDir()
	if _, err := newModel(filepath.Join(project, "missing")); err == nil || !strings.Contains(err.Error(), "project directory") {
		t.Fatalf("expected missing project error, got %v", err)
	}
	if err := os.Mkdir(filepath.Join(project, ".pi"), 0700); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(project, ".pi", "todos"), nil, 0600); err != nil {
		t.Fatal(err)
	}
	if _, err := newModel(project); err == nil || !strings.Contains(err.Error(), "read todo directory") {
		t.Fatalf("expected todo directory error, got %v", err)
	}
}

func TestQuitKey(t *testing.T) {
	app := model{}
	_, cmd := app.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'q'}})
	if cmd == nil || cmd() != tea.Quit() {
		t.Fatal("q should quit")
	}
}