'use strict';

const Promise = require('bluebird');
const util = require('util');
const bhttp = require('bhttp');
const { JSDOM } = require('jsdom');
const cheerio = require('cheerio');
const moment = require('moment');

const logger = require('../logger')(__filename);
const { ex, get } = require('../utils/q');
const http = require('../utils/http');
const slugify = require('../utils/slugify');

function getAlbumUrl(albumPath, site) {
	if (site.parameters?.photos) {
		return /^http/.test(site.parameters.photos)
			? `${site.parameters.photos}/${albumPath.split('/').slice(-2).join('/')}`
			: `${site.url}${site.parameters.photos}/${albumPath.split('/').slice(-2).join('/')}`;
	}

	if (site.url && site.parameters?.photos !== false) {
		return `${site.url}${albumPath}`;
	}

	return null;
}

async function fetchPhotos(url) {
	const res = await bhttp.get(url);

	return res.body.toString();
}

function scrapePhotos(html, includeThumbnails = true) {
	const $ = cheerio.load(html, { normalizeWhitespace: true });

	return $('.preview .imgLink, .pgFooterThumb a').toArray().map((linkEl) => {
		const url = $(linkEl).attr('href');

		if (/\/join|\/createaccount/.test(url)) {
			// URL links to join page instead of full photo, extract thumbnail
			// /createaccount is used by e.g. Tricky Spa native site
			const src = $(linkEl).find('img').attr('src');

			if (/previews\//.test(src)) {
				// resource often serves full photo at a modifier URL anyway, add as primary source
				const highRes = src
					.replace('previews/', '')
					.replace('_tb.jpg', '.jpg');

				// keep original thumbnail as fallback in case full photo is not available
				return [highRes, src];
			}

			if (!includeThumbnails) return null;

			return src;
		}

		// URL links to full photo
		return url;
	}).filter(Boolean);
}

async function getPhotos(albumPath, site, includeThumbnails = true) {
	const albumUrl = getAlbumUrl(albumPath, site);

	if (!albumUrl) {
		return [];
	}

	try {
		const html = await fetchPhotos(albumUrl);
		const $ = cheerio.load(html, { normalizeWhitespace: true });
		const photos = scrapePhotos(html, includeThumbnails);

		const lastPage = $('.Gamma_Paginator a.last').attr('href')?.match(/\d+$/)[0];

		if (lastPage) {
			const otherPages = Array.from({ length: Number(lastPage) }, (_value, index) => index + 1).slice(1);

			const otherPhotos = await Promise.map(otherPages, async (page) => {
				const pageUrl = `${albumUrl}/${page}`;
				const pageHtml = await fetchPhotos(pageUrl);

				return scrapePhotos(pageHtml, includeThumbnails);
			}, {
				concurrency: 2,
			});

			return photos.concat(otherPhotos.flat());
		}

		return photos;
	} catch (error) {
		logger.warn(`Failed to fetch ${site.name} photos from ${albumUrl}: ${error.message}`);

		return [];
	}
}

async function scrapeApiReleases(json, site) {
	return json.map((scene) => {
		if (site.parameters?.extract && scene.sitename !== site.parameters.extract) {
			return null;
		}

		const release = {
			entryId: scene.clip_id,
			title: scene.title,
			description: scene.description,
			duration: scene.length,
			likes: scene.ratings_up,
			dislikes: scene.ratings_down,
		};

		release.path = `/${scene.url_title}/${release.entryId}`;

		if (site.parameters?.scene) release.url = `${site.parameters.scene}${release.path}`;
		else if (site.url && site.parameters?.scene !== false) release.url = `${site.url}/en/video${release.path}`;

		release.date = moment.utc(scene.release_date, 'YYYY-MM-DD').toDate();
		release.actors = scene.actors.map(actor => ({ name: actor.name, gender: actor.gender }));
		release.director = scene.directors[0]?.name || null;

		release.tags = scene.master_categories
			.concat(scene.categories?.map(category => category.name))
			.filter(Boolean); // some categories don't have a name

		const posterPath = scene.pictures.resized || (scene.pictures.nsfw?.top && Object.values(scene.pictures.nsfw.top)[0]);

		if (posterPath) {
			release.poster = [
				`https://images-evilangel.gammacdn.com/movies${posterPath}`,
				`https://transform.gammacdn.com/movies${posterPath}`,
			];
		}

		// release.movie = `${site.url}/en/movie/${scene.url_movie_title}/${scene.movie_id}`;

		return release;
	}).filter(Boolean);
}

function scrapeAll(html, site, networkUrl, hasTeaser = true) {
	const $ = cheerio.load(html, { normalizeWhitespace: true });
	const scenesElements = $('li[data-itemtype=scene], div[data-itemtype=scenes]').toArray();

	return scenesElements.map((element) => {
		const release = {};

		const sceneLinkElement = $(element).find('.sceneTitle a, .tlcTitle a');

		if (site) release.url = `${networkUrl ? site.parent.url : site.url}${sceneLinkElement.attr('href')}`;
		else release.url = `${networkUrl}${sceneLinkElement.attr('href')}`;

		release.title = sceneLinkElement.attr('title');
		release.entryId = $(element).attr('data-itemid');

		const dateEl = $(element).find('.sceneDate, .tlcSpecsDate .tlcDetailsValue').text() || null;
		if (dateEl) {
			release.date = moment
				.utc(dateEl, ['MM-DD-YYYY', 'YYYY-MM-DD'])
				.toDate();
		}

		release.actors = $(element).find('.sceneActors a, .tlcActors a')
			.map((actorIndex, actorElement) => $(actorElement).attr('title'))
			.toArray();

		[release.likes, release.dislikes] = $(element).find('.value')
			.toArray()
			.map(value => Number($(value).text()));

		const posterEl = $(element).find('.imgLink img, .tlcImageItem');
		if (posterEl) release.poster = posterEl.attr('data-original') || posterEl.attr('src');

		const channelEl = $(element).find('.fromSite a');
		if (channelEl.attr('title')) release.channel = channelEl.attr('title').replace('.com', '');

		if (hasTeaser) {
			release.teaser = [
				{ src: `https://videothumb.gammacdn.com/600x339/${release.entryId}.mp4` },
				{ src: `https://videothumb.gammacdn.com/307x224/${release.entryId}.mp4` },
			];
		}

		return release;
	});
}

async function scrapeScene(html, url, site, baseRelease, mobileHtml) {
	const $ = cheerio.load(html, { normalizeWhitespace: true });
	const m$ = mobileHtml && cheerio.load(mobileHtml, { normalizeWhitespace: true });
	const release = { $, url };

	const json = $('script[type="application/ld+json"]').html();
	const videoJson = $('script:contains("window.ScenePlayerOptions")').html();

	const [data, data2] = json ? JSON.parse(json) : [];
	const videoData = videoJson && JSON.parse(videoJson.slice(videoJson.indexOf('{'), videoJson.indexOf('};') + 1));

	release.entryId = (baseRelease?.path || new URL(url).pathname).match(/\/(\d{2,})(\/|$)/)?.[1];
	release.title = videoData?.playerOptions?.sceneInfos.sceneTitle || data?.name;

	// date in data object is not the release date of the scene, but the date the entry was added; only use as fallback
	const dateString = $('.updatedDate').first().text().trim();
	const dateMatch = dateString.match(/\d{2,4}[-/]\d{2}[-/]\d{2,4}/)?.[0];

	if (dateMatch) release.date = moment.utc(dateMatch, ['MM-DD-YYYY', 'YYYY-MM-DD']).toDate();
	else if (data?.dateCreated) release.date = moment.utc(data.dateCreated, 'YYYY-MM-DD').toDate();
	else release.date = videoData.playerOptions.sceneInfos.sceneReleaseDate;

	if (data) {
		release.description = data.description;
		if (data.director?.[0]?.name) release.director = data.director[0].name;
		else if (data2?.director?.[0]?.name) release.director = data2.director[0].name;

		const stars = (data.aggregateRating.ratingValue / data.aggregateRating.bestRating) * 5;
		if (stars) release.rating = { stars };

		release.duration = moment.duration(data.duration.slice(2)).asSeconds();
	}

	const actors = data?.actor || data2?.actor;

	if (actors) {
		release.actors = actors.map(actor => ({
			name: actor.name,
			gender: actor.gender,
		}));
	}

	const hasTrans = release.actors?.some(actor => actor.gender === 'shemale');
	const rawTags = data?.keywords?.split(', ') || data2?.keywords?.split(', ') || [];
	release.tags = hasTrans ? [...rawTags, 'transsexual'] : rawTags;

	const channel = data?.productionCompany?.name
		|| $('.studioLink a, .siteLink a').attr('title')?.trim()
		|| $('.siteNameSpan').text()?.trim().toLowerCase().replace('.com', '')
		|| $('meta[name="twitter:domain"]').attr('content')?.replace('.com', '');

	if (channel) release.channel = slugify(channel, '');

	if (videoData.picPreview && new URL(videoData.picPreview).pathname.length > 1) release.poster = videoData.picPreview; // sometimes links to just https://images02-fame.gammacdn.com/

	const photoLink = $('.picturesItem a').attr('href');
	const mobilePhotos = m$ ? m$('.preview-displayer a img').map((photoIndex, photoEl) => $(photoEl).attr('src')).toArray() : [];

	if (photoLink) {
		const photos = await getPhotos(photoLink, site, mobilePhotos.length < 3); // only get thumbnails when less than 3 mobile photos are available

		if (photos.length < 7) release.photos = [...photos, ...mobilePhotos]; // probably only teaser photos available, supplement with mobile album
		else release.photos = photos;
	} else {
		release.photos = mobilePhotos;
	}

	const trailer = `${videoData.playerOptions.host}${videoData.url}`;
	release.trailer = [
		{
			src: trailer.replace('hd', 'sm'),
			quality: 240,
		},
		{
			src: trailer.replace('hd', 'med'),
			quality: 360,
		},
		{
			src: trailer.replace('hd', 'big'),
			quality: 480,
		},
		{
			// probably 540p
			src: trailer,
			quality: parseInt(videoData.sizeOnLoad, 10),
		},
		{
			src: trailer.replace('hd', '720p'),
			quality: 720,
		},
		{
			src: trailer.replace('hd', '1080p'),
			quality: 1080,
		},
		{
			src: trailer.replace('hd', '4k'),
			quality: 2160,
		},
	];

	return release;
}

function scrapeActorSearch(html, url, actorName) {
	const { document } = new JSDOM(html).window;
	const actorLink = document.querySelector(`a[title="${actorName}" i]`);

	return actorLink ? actorLink.href : null;
}

async function fetchActorReleases(profileUrl, getActorReleasesUrl, page = 1, accReleases = []) {
	const { origin, pathname } = new URL(profileUrl);
	const profilePath = `/${pathname.split('/').slice(-2).join('/')}`;

	const url = getActorReleasesUrl(profilePath, page);
	const res = await get(url);

	if (!res.ok) return [];

	const releases = scrapeAll(res.item.html, null, origin);
	const nextPage = res.item.query.url('.Gamma_Paginator a.next');

	if (nextPage) {
		return fetchActorReleases(profileUrl, getActorReleasesUrl, page + 1, accReleases.concat(releases));
	}

	return accReleases.concat(releases);
}

async function scrapeProfile(html, url, actorName, _siteSlug, getActorReleasesUrl, withReleases) {
	const { q } = ex(html);

	const avatar = q('img.actorPicture');
	const hair = q('.actorProfile .attribute_hair_color', true);
	const height = q('.actorProfile .attribute_height', true);
	const weight = q('.actorProfile .attribute_weight', true);
	const alias = q('.actorProfile .attribute_alternate_names', true);
	const nationality = q('.actorProfile .attribute_home', true);

	const profile = {
		name: actorName,
	};

	if (avatar) {
		// larger sizes usually available, provide fallbacks
		const avatars = [
			avatar.src.replace(/\d+x\d+/, '500x750'),
			avatar.src.replace(/\d+x\d+/, '240x360'),
			avatar.src.replace(/\d+x\d+/, '200x300'),
			avatar.src,
		];

		profile.avatar = avatars;
	}

	profile.description = q('.actorBio p:not(.bioTitle)', true);

	if (hair) profile.hair = hair.split(':')[1].trim();
	if (height) profile.height = Number(height.match(/\d+/)[0]);
	if (weight) profile.weight = Number(weight.match(/\d+/)[0]);
	if (alias) profile.aliases = alias.split(':')[1].trim().split(', ');
	if (nationality) profile.nationality = nationality.split(':')[1].trim();

	if (getActorReleasesUrl && withReleases) {
		profile.releases = await fetchActorReleases(url, getActorReleasesUrl);
	}

	return profile;
}

function scrapeApiProfile(data, releases, siteSlug) {
	const profile = {};

	if (data.male === 1) profile.gender = 'male';
	if (data.female === 1) profile.gender = 'female';
	if (data.shemale === 1 || data.trans === 1) profile.gender = 'transsexual';

	if (data.description) profile.description = data.description.trim();

	if (data.attributes.ethnicity) profile.ethnicity = data.attributes.ethnicity;
	if (data.attributes.eye_color) profile.eyes = data.attributes.eye_color;
	if (data.attributes.hair_color) profile.hair = data.attributes.hair_color;

	const avatarPaths = Object.values(data.pictures).reverse();
	if (avatarPaths.length > 0) profile.avatar = avatarPaths.map(avatarPath => `https://images01-evilangel.gammacdn.com/actors${avatarPath}`);

	if (releases) profile.releases = releases.map(release => `https://${siteSlug}.com/en/video/${release.url_title}/${release.clip_id}`);

	return profile;
}

function getApiUrl(appId, apiKey) {
	const userAgent = 'Algolia for vanilla JavaScript (lite) 3.27.0;instantsearch.js 2.7.4;JS Helper 2.26.0';

	const apiUrl = `https://${appId.toLowerCase()}-dsn.algolia.net/1/indexes/*/queries?x-algolia-agent=${userAgent}&x-algolia-application-id=${appId}&x-algolia-api-key=${apiKey}`;

	return {
		appId,
		apiKey,
		userAgent,
		apiUrl,
	};
}

async function fetchApiCredentials(referer, site) {
	if (site?.parameters?.appId && site?.parameters?.apiKey) {
		return getApiUrl(site.parameters.appId, site.parameters.apiKey);
	}

	const res = await http.get(referer);
	const body = res.body.toString();

	const apiLine = body.split('\n').find(bodyLine => bodyLine.match('apiKey'));

	if (!apiLine) {
		throw new Error(`No Gamma API key found for ${referer}`);
	}

	const apiSerial = apiLine.slice(apiLine.indexOf('{'), apiLine.indexOf('};') + 1);
	const apiData = JSON.parse(apiSerial);

	const { applicationID: appId, apiKey } = apiData.api.algolia;

	return getApiUrl(appId, apiKey);
}

async function fetchApiLatest(site, page = 1, preData, include, upcoming = false) {
	const referer = site.parameters?.referer || `${site.parameters?.networkReferer ? site.parent.url : site.url}/en/videos`;
	const { apiUrl } = await fetchApiCredentials(referer, site);

	const res = await bhttp.post(apiUrl, {
		requests: [
			{
				indexName: 'all_scenes',
				params: `query=&hitsPerPage=36&maxValuesPerFacet=100&page=${page - 1}&facetFilters=[["lesbian:"],["bisex:"],["shemale:"],["upcoming:${upcoming ? 1 : 0}"]]&filters=sitename:${site.slug} OR channels.id:${site.slug}`,
			},
		],
	}, {
		headers: {
			Referer: referer,
		},
		encodeJSON: true,
	});

	if (res.statusCode === 200 && res.body.results?.[0]?.hits) {
		return scrapeApiReleases(res.body.results[0].hits, site);
	}

	return [];
}

async function fetchApiUpcoming(site, page = 1, preData, include) {
	return fetchApiLatest(site, page, preData, include, true);
}

function getLatestUrl(site, page) {
	if (site.parameters?.latest) {
		if (/^http/.test(site.parameters.latest)) {
			return /%d/.test(site.parameters.latest)
				? util.format(site.parameters.latest, page)
				: `${site.parameters.latest}${page}`;
		}

		return /%d/.test(site.parameters.latest)
			? util.format(`${site.url}${site.parameters.latest}`, page)
			: `${site.url}${site.parameters.latest}${page}`;
	}

	return `${site.url}/en/videos/AllCategories/0/${page}`;
}

function getUpcomingUrl(site) {
	if (site.parameters?.upcoming) {
		return /^http/.test(site.parameters.upcoming)
			? `${site.parameters.upcoming}`
			: `${site.url}${site.parameters.upcoming}`;
	}

	return `${site.url}/en/videos/AllCategories/0/1/upcoming`;
}

async function fetchLatest(site, page = 1) {
	const url = getLatestUrl(site, page);
	const res = await bhttp.get(url);

	return scrapeAll(res.body.toString(), site);
}

async function fetchUpcoming(site) {
	const url = getUpcomingUrl(site);
	const res = await bhttp.get(url);

	return scrapeAll(res.body.toString(), site, null, false);
}

function getDeepUrl(url, site, baseRelease, mobile) {
	const filter = new Set(['en', 'video', 'scene', site.slug, site.parent.slug]);
	const pathname = baseRelease?.path || new URL(url).pathname
		.split('/')
		.filter(component => !filter.has(component))
		.join('/'); // reduce to scene ID and title slug

	const sceneId = baseRelease?.entryId || pathname.match(/\/(\d+)\//)?.[1];

	if (mobile && /%d/.test(mobile)) {
		return util.format(mobile, sceneId);
	}

	if (mobile && sceneId) {
		return `${mobile}${pathname}`;
	}

	if (site.parameters?.deep) {
		return `${site.parameters.deep}${pathname}`;
	}

	return url;
}

async function fetchScene(url, site, baseRelease) {
	if (site.parameters?.deep === false) {
		return baseRelease;
	}

	const deepUrl = getDeepUrl(url, site, baseRelease);
	const mobileUrl = getDeepUrl(url, site, baseRelease, site.parameters?.mobile || site.parent?.parameters?.mobile);

	if (deepUrl) {
		const [res, mobileRes] = await Promise.all([
			bhttp.get(deepUrl),
			mobileUrl && bhttp.get(mobileUrl, {
				headers: {
					// don't redirect to main site
					'user-agent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Mobile Safari/537.36',
				},
			}),
		]);

		if (res.statusCode === 200) {
			const mobileBody = mobileRes?.statusCode === 200 ? mobileRes.body.toString() : null;
			const scene = await scrapeScene(res.body.toString(), url, site, baseRelease, mobileBody);

			return { ...scene, deepUrl };
		}
	}

	return null;
}

async function fetchActorScenes(actorName, apiUrl, siteSlug) {
	const res = await bhttp.post(apiUrl, {
		requests: [
			{
				indexName: 'all_scenes',
				params: `query=&filters=sitename:${siteSlug}&hitsPerPage=36&maxValuesPerFacet=100&page=0&facetFilters=[["lesbian:"],["bisex:"],["shemale:"],["actors.name:${actorName}"]]`,
			},
		],
	}, {
		headers: {
			Referer: `https://www.${siteSlug}.com/en/videos`,
		},
		encodeJSON: true,
	});

	if (res.statusCode === 200 && res.body.results[0].hits.length > 0) {
		return res.body.results[0].hits;
	}

	return [];
}

async function fetchProfile({ name: actorName }, context, altSearchUrl, getActorReleasesUrl, include) {
	const siteSlug = context.entity.slug || context.site?.slug || context.network?.slug;

	const actorSlug = actorName.toLowerCase().replace(/\s+/, '+');
	const searchUrl = altSearchUrl
		? `https://www.${siteSlug}.com/en/search/${actorSlug}/1/actor`
		: `https://www.${siteSlug}.com/en/search/${siteSlug}/actor/${actorSlug}`;
	const searchRes = await bhttp.get(searchUrl);

	if (searchRes.statusCode !== 200) {
		return null;
	}

	const actorUrl = scrapeActorSearch(searchRes.body.toString(), searchUrl, actorName);

	if (actorUrl) {
		const url = `https://${siteSlug}.com${actorUrl}`;
		const actorRes = await bhttp.get(url);

		if (actorRes.statusCode !== 200) {
			return null;
		}

		return scrapeProfile(actorRes.body.toString(), url, actorName, siteSlug, getActorReleasesUrl, include.scenes);
	}

	return null;
}

async function fetchApiProfile({ name: actorName }, context, include) {
	const siteSlug = context.entity.slug || context.site?.slug || context.network?.slug;

	const actorSlug = encodeURI(actorName);
	const referer = `https://www.${siteSlug}.com/en/search`;

	const { apiUrl } = await fetchApiCredentials(referer);

	const res = await http.post(apiUrl, {
		requests: [
			{
				indexName: 'all_actors',
				params: `query=${actorSlug}`,
			},
		],
	}, {
		Referer: referer,
	}, {
		encodeJSON: true,
	});

	if (res.status === 200 && res.body.results[0].hits.length > 0) {
		const actorData = res.body.results[0].hits.find(actor => slugify(actor.name) === slugify(actorName));

		if (actorData) {
			const actorScenes = include.releases && await fetchActorScenes(actorData.name, apiUrl, siteSlug);

			return scrapeApiProfile(actorData, actorScenes, siteSlug);
		}
	}

	return null;
}

module.exports = {
	fetchApiLatest,
	fetchApiProfile,
	fetchApiUpcoming,
	fetchLatest,
	fetchProfile,
	fetchScene,
	fetchUpcoming,
	getPhotos,
	scrapeApiProfile,
	scrapeApiReleases,
	scrapeProfile,
	scrapeAll,
	scrapeScene,
};