'use strict';

const Promise = require('bluebird');

const logger = require('../logger');
const { fetchApiLatest } = require('./gamma');
const qu = require('../utils/qu');
const http = require('../utils/http');
const slugify = require('../utils/slugify');

async function fetchActors(entryId, channel, { token, time }) {
	const url = `${channel.url}/sapi/${token}/${time}/model.getModelContent?_method=model.getModelContent&tz=1&fields[0]=modelId.stageName&fields[1]=_last&fields[2]=modelId.upsellLink&fields[3]=modelId.upsellText&limit=25&transitParameters[contentId]=${entryId}`;
	const res = await http.get(url);

	if (res.statusCode === 200 && res.body.status === true) {
		return Object.values(res.body.response.collection).map(actor => Object.values(actor.modelId.collection)[0].stageName);
	}

	return [];
}

async function fetchTrailerLocation(entryId, channel) {
	const url = `${channel.url}/api/download/${entryId}/hd1080/stream`;

	try {
		const res = await http.get(url, null, {
			followRedirects: false,
		});

		if (res.statusCode === 302) {
			return res.headers.location;
		}
	} catch (error) {
		logger.warn(`${channel.name}: Unable to fetch trailer at '${url}': ${error.message}`);
	}

	return null;
}

function scrapeLatest(items, channel) {
	return items.map(({ query }) => {
		const release = {};

		release.url = query.url('h5 a', null, { origin: channel.url });
		release.entryId = new URL(release.url).pathname.match(/\/(\d+)/)[1];

		release.title = query.cnt('h5 a');

		[release.poster, ...release.photos] = query.imgs('.screenshot').map(src => [
			// unnecessarily large
			// src.replace(/\/\d+/, 3840),
			// src.replace(/\/\d+/, '/2000'),
			src.replace(/\/\d+/, '/1500'),
			src.replace(/\/\d+/, '/1000'),
			src,
		]);

		return release;
	});
}

function scrapeScene({ query, html }, url, channel) {
	const release = {};

	release.entryId = new URL(url).pathname.match(/\/(\d+)/)[1];

	release.title = query.cnt('h1.description');
	release.actors = query
		.all('.video-performer')
		.map((actorEl) => {
			const actorUrl = query.url(actorEl, 'a', 'href', { origin: channel.url });
			const entryId = new URL(url).pathname.match(/\/(\d+)/)?.[1];
			const avatar = query.img(actorEl, 'img:not([data-bgsrc*="not-available"])', 'data-bgsrc');

			return {
				name: query.cnt(actorEl, '.video-performer-name'),
				gender: 'female',
				avatar: avatar && [
					avatar.replace(/\/actor\/(\d+)/, '/actor/500'),
					avatar,
				],
				url: actorUrl,
				entryId,
			};
		})
		.concat({ name: 'Jay Rock', gender: 'male' });

	release.date = query.date('.release-date:first-child', 'MMM DD, YYYY', /\w+ \d{1,2}, \d{4}/);
	release.duration = query.number('.release-date:last-child') * 60;

	release.studio = query.cnt('.studio span:nth-child(2)');
	release.director = query.text('.director');

	release.tags = query.cnts('.tags a');

	const poster = html.match(/url\((https.+\.jpg)\)/)?.[1];
	const photos = query.imgs('#moreScreenshots img');

	[release.poster, ...release.photos] = [poster]
		.concat(photos)
		.filter(Boolean)
		.map(src => [
			src.replace(/\/(\d+)\/\d+/, '/$1/1500'),
			src.replace(/\/(\d+)\/\d+/, '/$1/1000'),
			src,
		]);

	const videoId = html.match(/item: (\d+)/)?.[1];

	if (videoId) {
		release.trailer = { stream: `https://trailer.adultempire.com/hls/trailer/${videoId}/master.m3u8` };
	}

	return release;
}

async function scrapeSceneApi(scene, channel, tokens, deep) {
	const release = {
		entryId: scene.id,
		title: scene.title,
		duration: scene.length,
		meta: {
			tokens, // attach tokens to reduce number of requests required for deep fetching
		},
	};

	release.url = `${channel.url}/scene/${release.entryId}/${slugify(release.title, { encode: true })}`;
	release.date = new Date(scene.sites.collection[scene.id].publishDate);
	release.poster = scene._resources.primary[0].url;

	if (scene.tags) release.tags = Object.values(scene.tags.collection).map(tag => tag.alias);
	if (scene._resources.base) release.photos = scene._resources.base.map(resource => resource.url);

	if (deep) {
		// don't make external requests during update scraping, as this would happen for every scene on the page
		const [actors, trailer] = await Promise.all([
			fetchActors(release.entryId, channel, tokens),
			fetchTrailerLocation(release.entryId, channel),
		]);

		release.actors = actors;

		if (trailer) {
			release.trailer = { src: trailer, quality: 1080 };
		}
	}

	return release;
}

function scrapeLatestApi(scenes, site, tokens) {
	return Promise.map(scenes, async scene => scrapeSceneApi(scene, site, tokens, false), { concurrency: 10 });
}

async function fetchToken(channel) {
	const res = await http.get(channel.url);
	const html = res.body.toString();

	const time = html.match(/"aet":\d+/)[0].split(':')[1];
	const ah = html.match(/"ah":"[\w-]+"/)[0].split(':')[1].slice(1, -1);
	const token = ah.split('').reverse().join('');

	return { time, token };
}

async function fetchLatestApi(channel, page = 1) {
	const { time, token } = await fetchToken(channel);

	// transParameters[v1] includes _resources, [v2] includes photos, [preset] is mandatory
	const url = `${channel.url}/sapi/${token}/${time}/content.load?limit=50&offset=${(page - 1) * 50}&transitParameters[v1]=OhUOlmasXD&transitParameters[v2]=OhUOlmasXD&transitParameters[preset]=videos`;
	const res = await http.get(url);

	if (res.ok && res.body.status) {
		return scrapeLatestApi(res.body.response.collection, channel, { time, token });
	}

	return res.ok ? res.body.status : res.status;
}

async function fetchLatest(channel, page = 1, options, preData) {
	if (channel.parameters?.useApi) {
		return fetchLatestApi(channel, page, options, preData);
	}

	if (channel.parameters?.useGamma) {
		return fetchApiLatest(channel, page, preData, options, false);
	}

	const res = await qu.getAll(`https://jayspov.net/jays-pov-updates.html?view=list&page=${page}`, '.item-grid-list-view > .grid-item');

	if (res.ok) {
		return scrapeLatest(res.items, channel);
	}

	return res.status;
}

async function fetchSceneApi(url, channel, baseRelease) {
	const { time, token } = baseRelease?.meta.tokens || await fetchToken(channel); // use attached tokens when deep fetching
	const { pathname } = new URL(url);
	const entryId = pathname.split('/')[2];

	const apiUrl = `${channel.url}/sapi/${token}/${time}/content.load?filter[id][fields][0]=id&filter[id][values][0]=${entryId}&transitParameters[v1]=ykYa8ALmUD&transitParameters[preset]=scene`;
	const res = await http.get(apiUrl);

	if (res.ok && res.body.status) {
		return scrapeSceneApi(res.body.response.collection[0], channel, { time, token }, true);
	}

	return res.ok ? res.body.status : res.status;
}

async function fetchScene(url, channel) {
	if (channel.parameters?.useApi) {
		return fetchSceneApi(url, channel);
	}

	const res = await qu.get(url);

	if (res.ok) {
		return scrapeScene(res.item, url, channel);
	}

	return res.status;
}

module.exports = {
	fetchLatest,
	fetchScene,
};