'use strict';

/* example for other ModelCentro scrapers */
const Promise = require('bluebird');
const bhttp = require('bhttp');

const logger = require('../logger')(__filename);
const slugify = require('../utils/slugify');
const { fetchApiLatest, fetchScene } = require('./gamma');

async function fetchToken(site) {
	const res = await bhttp.get(site.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 fetchActors(entryId, site, { token, time }) {
	const url = `${site.url}/sapi/${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 bhttp.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, site) {
	const url = `${site.url}/api/download/${entryId}/hd1080/stream`;

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

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

	return null;
}

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

	release.url = `${site.url}/scene/${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);

	const [actors, trailer] = await Promise.all([
		fetchActors(release.entryId, site, tokens),
		fetchTrailerLocation(release.entryId, site),
	]);

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

	return release;
}

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

async function fetchLatest(site, page = 1) {
	if (site.parameters?.useGamma) {
		return fetchApiLatest(site, page);
	}

	const { time, token } = await fetchToken(site);

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

	if (res.statusCode === 200 && res.body.status) {
		return scrapeLatest(res.body.response.collection, site, { time, token });
	}

	return null;
}

async function fetchNetworkScene(url, site, release) {
	if (site.parameters?.useGamma) {
		return fetchScene(url, site, release);
	}

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

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

	if (res.statusCode === 200 && res.body.status) {
		return scrapeScene(res.body.response.collection[0], site, { time, token });
	}

	return null;
}

module.exports = {
	fetchLatest,
	fetchScene: fetchNetworkScene,
};