const m3u8Parser = require('m3u8-parser');
const fetch = require('node-fetch');
const url = require('url');
const { test } = require('@jest/globals');

const REPLAYS_API = '/api/replays';
const TEST_OWNCAST_INSTANCE = 'http://localhost:8080';
const HLS_FETCH_ITERATIONS = 5;

jest.setTimeout(40000);

async function getPlaylist(urlString) {
	const response = await fetch(urlString);
	expect(response.status).toBe(200);
	const body = await response.text();

	var parser = new m3u8Parser.Parser();

	parser.push(body);
	parser.end();

	return parser.manifest;
}

async function getReplaysAPI(urlString) {
	const response = await fetch(urlString);
	expect(response.status).toBe(200);
	const body = await response.text();
	return body;
}

function normalizeUrl(urlString, baseUrl) {
	let parsedString = url.parse(urlString);
	if (!parsedString.host) {
		const testInstanceRoot = url.parse(baseUrl);
		parsedString.protocol = testInstanceRoot.protocol;
		parsedString.host = testInstanceRoot.host;

		const filename = baseUrl.substring(baseUrl.lastIndexOf('/') + 1);
		parsedString.pathname =
			testInstanceRoot.pathname.replace(filename, '') + urlString;
	}
	return url.format(parsedString).toString();
}

// Iterate over an array of video segments and make sure they return back
// valid status.
async function validateSegments(segments) {
	for (let segment of segments) {
		const res = await fetch(segment);
		expect(res.status).toBe(200);
	}
}

describe('fetch list of clips', () => {
	const replaysAPIEndpoint = `${TEST_OWNCAST_INSTANCE}${REPLAYS_API}`;
	// var masterPlaylist;
	// var mediaPlaylistUrl;

	test('fetch replay list', async (done) => {
		console.log(replaysAPIEndpoint);
		try {
			const response = await getReplaysAPI(replaysAPIEndpoint);
			console.log(response);
		} catch (e) {
			console.error('error fetching and parsing master playlist', e);
		}

		done();
	});

	// test('verify there is a media playlist', () => {
	// 	// Master playlist should have at least one media playlist.
	// 	expect(masterPlaylist.playlists.length).toBe(1);

	// 	try {
	// 		mediaPlaylistUrl = normalizeUrl(
	// 			masterPlaylist.playlists[0].uri,
	// 			masterPlaylistUrl
	// 		);
	// 	} catch (e) {
	// 		console.error('error fetching and parsing media playlist', e);
	// 	}
	// });

	// test('verify there are segments', async (done) => {
	// 	let playlist;
	// 	try {
	// 		playlist = await getPlaylist(mediaPlaylistUrl);
	// 	} catch (e) {
	// 		console.error('error verifying segments in media playlist', e);
	// 	}

	// 	const segments = playlist.segments;
	// 	expect(segments.length).toBeGreaterThan(0);

	// 	done();
	// });

	// // Iterate over segments and make sure they change.
	// // Use the reported duration of the segment to wait to
	// // fetch another just like a real HLS player would do.
	// var lastSegmentUrl;
	// for (let i = 0; i < HLS_FETCH_ITERATIONS; i++) {
	// 	test('fetch and monitor media playlist segments ' + i, async (done) => {
	// 		await new Promise((r) => setTimeout(r, 5000));

	// 		try {
	// 			var playlist = await getPlaylist(mediaPlaylistUrl);
	// 		} catch (e) {
	// 			console.error('error updating media playlist', mediaPlaylistUrl, e);
	// 		}

	// 		const segments = playlist.segments;
	// 		const segment = segments[segments.length - 1];
	// 		expect(segment.uri).not.toBe(lastSegmentUrl);

	// 		try {
	// 			var segmentUrl = normalizeUrl(segment.uri, mediaPlaylistUrl);
	// 			await validateSegments([segmentUrl]);
	// 		} catch (e) {
	// 			console.error('unable to validate HLS segment', segmentUrl, e);
	// 		}

	// 		lastSegmentUrl = segment.uri;

	// 		done();
	// 	});
	// }
});