import { vi, describe, it, expect, afterEach } from 'vitest';
import { cleanup, render } from 'vitest-browser-svelte';
import { page } from 'vitest/browser';

import PdfControls from './PdfControls.svelte';

afterEach(cleanup);

const defaultProps = {
	currentPage: 1,
	totalPages: 3,
	isLoaded: true,
	showAnnotations: false,
	annotationCount: 0,
	onPrev: vi.fn(),
	onNext: vi.fn(),
	onZoomIn: vi.fn(),
	onZoomOut: vi.fn(),
	onToggleAnnotations: vi.fn()
};

describe('PdfControls — annotation toggle visibility', () => {
	it('renders annotation toggle when annotationCount is greater than zero', async () => {
		render(PdfControls, { ...defaultProps, annotationCount: 3 });
		await expect
			.element(page.getByRole('button', { name: /annotierungen anzeigen/i }))
			.toBeInTheDocument();
	});

	it('does not render annotation toggle when annotationCount is zero', async () => {
		render(PdfControls, { ...defaultProps, annotationCount: 0 });
		await expect
			.element(page.getByRole('button', { name: /annotierungen/i }))
			.not.toBeInTheDocument();
	});
});

describe('PdfControls — annotation toggle label', () => {
	it('shows "Annotierungen anzeigen" label when annotations are hidden', async () => {
		render(PdfControls, { ...defaultProps, annotationCount: 2, showAnnotations: false });
		const btn = page.getByRole('button', { name: /annotierungen anzeigen/i });
		await expect.element(btn).toBeInTheDocument();
	});

	it('shows "Annotierungen verbergen" label when annotations are visible', async () => {
		render(PdfControls, { ...defaultProps, annotationCount: 2, showAnnotations: true });
		const btn = page.getByRole('button', { name: /annotierungen verbergen/i });
		await expect.element(btn).toBeInTheDocument();
	});
});

describe('PdfControls — annotation toggle contrast (WCAG 2.1 AA)', () => {
	it('uses text-primary class on annotation toggle button when annotations are hidden', async () => {
		const { container } = render(PdfControls, {
			...defaultProps,
			annotationCount: 2,
			showAnnotations: false
		});
		const allButtons = container.querySelectorAll('button');
		const annotationBtn = Array.from(allButtons).find((b) =>
			b.getAttribute('aria-label')?.toLowerCase().includes('annotierungen')
		);
		expect(annotationBtn).not.toBeNull();
		expect(annotationBtn!.className).toContain('text-primary');
		expect(annotationBtn!.className).not.toContain('text-accent');
	});
});