import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { render, screen, act } from '@testing-library/svelte';
import userEvent from '@testing-library/user-event';
import UndoBar from './UndoBar.svelte';

describe('UndoBar', () => {
	beforeEach(() => {
		vi.useFakeTimers();
	});

	afterEach(() => {
		vi.useRealTimers();
	});

	it('is not mounted when visible is false', () => {
		render(UndoBar, { props: { visible: false, message: 'Test', onundo: vi.fn(), ondismiss: vi.fn() } });
		expect(screen.queryByTestId('undo-bar')).toBeNull();
	});

	it('is mounted and shows message when visible is true', () => {
		render(UndoBar, { props: { visible: true, message: 'Gericht hinzugefügt', onundo: vi.fn(), ondismiss: vi.fn() } });
		expect(screen.getByTestId('undo-bar')).toBeTruthy();
		expect(screen.getByText('Gericht hinzugefügt')).toBeTruthy();
	});

	it('shows Rückgängig button', () => {
		render(UndoBar, { props: { visible: true, message: 'Test', onundo: vi.fn(), ondismiss: vi.fn() } });
		expect(screen.getByRole('button', { name: /Rückgängig/i })).toBeTruthy();
	});

	it('calls onundo when Rückgängig is clicked', async () => {
		const onundo = vi.fn();
		render(UndoBar, { props: { visible: true, message: 'Test', onundo, ondismiss: vi.fn() } });
		await userEvent.click(screen.getByRole('button', { name: /Rückgängig/i }));
		expect(onundo).toHaveBeenCalledOnce();
	});

	it('calls ondismiss after 4 seconds', async () => {
		const ondismiss = vi.fn();
		render(UndoBar, { props: { visible: true, message: 'Test', onundo: vi.fn(), ondismiss } });
		await act(() => { vi.advanceTimersByTime(4000); });
		expect(ondismiss).toHaveBeenCalledOnce();
	});

	it('does not call ondismiss before 4 seconds', async () => {
		const ondismiss = vi.fn();
		render(UndoBar, { props: { visible: true, message: 'Test', onundo: vi.fn(), ondismiss } });
		await act(() => { vi.advanceTimersByTime(3999); });
		expect(ondismiss).not.toHaveBeenCalled();
	});

	it('has role="status" for accessibility', () => {
		render(UndoBar, { props: { visible: true, message: 'Test', onundo: vi.fn(), ondismiss: vi.fn() } });
		expect(screen.getByRole('status')).toBeTruthy();
	});
});