import { describe, expect, it } from 'vitest';
import {
	buildEmbedUrl,
	detectVideoProvider,
	extractMetadataFromHtml,
	fetchPresentationMetadata
} from './presentation.js';

describe('presentation metadata and providers', () => {
	it('recognizes supported YouTube URL forms and creates privacy-enhanced embeds with start time', () => {
		for (const url of [
			'https://www.youtube.com/watch?v=dQw4w9WgXcQ',
			'https://youtu.be/dQw4w9WgXcQ',
			'https://www.youtube.com/shorts/dQw4w9WgXcQ',
			'https://youtube.com/live/dQw4w9WgXcQ'
		]) {
			expect(detectVideoProvider(url)).toEqual({ provider: 'youtube', id: 'dQw4w9WgXcQ' });
		}
		expect(buildEmbedUrl('youtube', 'dQw4w9WgXcQ', 75)).toBe(
			'https://www.youtube-nocookie.com/embed/dQw4w9WgXcQ?start=75'
		);
		expect(detectVideoProvider('https://evil.example/watch?v=dQw4w9WgXcQ')).toBeNull();
		expect(detectVideoProvider('https://youtube.com/watch?v=invalid')).toBeNull();
	});

	it('recognizes canonical TikTok videos without inventing a start parameter', () => {
		expect(
			detectVideoProvider('https://www.tiktok.com/@scout2015/video/6718335390845095173')
		).toEqual({ provider: 'tiktok', id: '6718335390845095173' });
		expect(buildEmbedUrl('tiktok', '6718335390845095173', 90)).toBe(
			'https://www.tiktok.com/player/v1/6718335390845095173?autoplay=0&controls=1'
		);
	});

	it('extracts generic metadata from local HTML and tolerates a missing image', async () => {
		const metadata = await extractMetadataFromHtml(
			`<!doctype html><html><head>
				<meta property="og:title" content="Lokale Vorschau">
				<meta property="og:description" content="Ein kurzer Anreißer">
				<meta property="og:site_name" content="Testseite">
			</head></html>`,
			'https://example.com/artikel'
		);
		expect(metadata).toMatchObject({
			title: 'Lokale Vorschau',
			description: 'Ein kurzer Anreißer',
			imageUrl: '',
			siteName: 'Testseite'
		});
	});

	it('rejects malformed and private metadata targets before a network request', async () => {
		await expect(fetchPresentationMetadata('keine-url')).rejects.toThrow('FETCH_INVALID_URL');
		await expect(fetchPresentationMetadata('http://127.0.0.1/private')).rejects.toThrow(
			'FETCH_BLOCKED'
		);
		await expect(fetchPresentationMetadata('http://[::1]/private')).rejects.toThrow(
			'FETCH_BLOCKED'
		);
	});
});