package app_test

import (
	"testing"
	"time"

	"github.com/gdamore/tcell/v2"
	"github.com/nebara/nebara-os/internal/app"
	"github.com/nebara/nebara-os/internal/mock"
)

func TestApplication_FullLifecycleSimulation(t *testing.T) {
	simScreen := tcell.NewSimulationScreen("")
	if err := simScreen.Init(); err != nil {
		t.Fatalf("simScreen init: %v", err)
	}

	simScreen.SetSize(120, 40)

	state := app.NewStateFromMock(mock.WarningState())
	state.EnableSixel = true

	application := app.NewApplication(state)
	application.SetScreen(simScreen)

	done := make(chan error, 1)
	go func() {
		done <- application.Run()
	}()

	// Allow initial frame to draw
	time.Sleep(100 * time.Millisecond)

	// 1. Test navigation (Down, Up)
	simScreen.InjectKey(tcell.KeyDown, 0, tcell.ModNone)
	time.Sleep(50 * time.Millisecond)
	simScreen.InjectKey(tcell.KeyUp, 0, tcell.ModNone)
	time.Sleep(50 * time.Millisecond)

	// 2. Test F1 Help Modal open and close
	simScreen.InjectKey(tcell.KeyF1, 0, tcell.ModNone)
	time.Sleep(50 * time.Millisecond)
	simScreen.InjectKey(tcell.KeyEscape, 0, tcell.ModNone)
	time.Sleep(50 * time.Millisecond)

	// 3. Test terminal resize (compact size and back)
	simScreen.SetSize(90, 28)
	time.Sleep(50 * time.Millisecond)
	simScreen.SetSize(120, 40)
	time.Sleep(50 * time.Millisecond)

	// 4. Test normal exit (Ctrl+C)
	simScreen.InjectKey(tcell.KeyCtrlC, 'c', tcell.ModCtrl)

	select {
	case err := <-done:
		if err != nil {
			t.Errorf("application run error: %v", err)
		}
	case <-time.After(2 * time.Second):
		t.Fatal("application failed to terminate cleanly (possible deadlock)")
	}
}

func TestApplication_TextFallbackLifecycle(t *testing.T) {
	simScreen := tcell.NewSimulationScreen("")
	if err := simScreen.Init(); err != nil {
		t.Fatalf("simScreen init: %v", err)
	}

	simScreen.SetSize(120, 40)

	state := app.NewStateFromMock(mock.NormalState())
	state.EnableSixel = false // SIXEL disabled

	application := app.NewApplication(state)
	application.SetScreen(simScreen)

	done := make(chan error, 1)
	go func() {
		done <- application.Run()
	}()

	time.Sleep(100 * time.Millisecond)
	simScreen.InjectKey(tcell.KeyCtrlC, 'c', tcell.ModCtrl)

	select {
	case err := <-done:
		if err != nil {
			t.Errorf("application run error: %v", err)
		}
	case <-time.After(2 * time.Second):
		t.Fatal("application failed to terminate cleanly")
	}
}