'use strict';

const { JSDOM } = require('jsdom');
const cheerio = require('cheerio');
const moment = require('moment');

const http = require('../utils/http');
const slugify = require('../utils/slugify');

function extractTitle(originalTitle) {
	const titleComponents = originalTitle.split(' ');
	// const sceneIdMatch = titleComponents.slice(-1)[0].match(/(AB|AF|GP|SZ|IV|GIO|RS|TW|MA|FM|SAL|NR|AA|GL|BZ|FS|KS|OTS|NF|NT|AX|RV|CM|BTG)\d+/); // detect studio prefixes
	const sceneIdMatch = titleComponents.slice(-1)[0].match(/\w+\d+\s*$/); // detect studio prefixes
	const shootId = sceneIdMatch ? sceneIdMatch[0] : null;
	const title = sceneIdMatch ? titleComponents.slice(0, -1).join(' ') : originalTitle;

	return { shootId, title };
}

function getPoster(posterElement, sceneId) {
	const posterStyle = posterElement.attr('style');

	if (posterStyle) {
		return posterStyle.slice(posterStyle.indexOf('(') + 1, -1);
	}

	const posterRange = posterElement.attr('data-casting');
	const posterRangeData = posterRange ? JSON.parse(posterRange) : null;
	const posterTimeRange = posterRangeData[Math.floor(Math.random() * posterRangeData.length)];

	if (!posterTimeRange) {
		return null;
	}

	if (typeof posterTimeRange === 'number') {
		// poster time is already a single time value
		return `https://legalporno.com/casting/${sceneId}/${posterTimeRange}`;
	}

	const [max, min] = posterTimeRange.split('-');
	const posterTime = Math.floor(Math.random() * (Number(max) - Number(min) + 1) + Number(min));

	return `https://legalporno.com/casting/${sceneId}/${posterTime}`;
}

function scrapeAll(html) {
	const $ = cheerio.load(html, { normalizeWhitespace: true });
	const scenesElements = $('.thumbnails > div').toArray();

	return scenesElements.map((element) => {
		const sceneLinkElement = $(element).find('.thumbnail-title a');
		const url = sceneLinkElement.attr('href');

		const originalTitle = sceneLinkElement.text().trim(); // title attribute breaks when they use \\ escaping
		const { shootId, title } = extractTitle(originalTitle);
		const entryId = new URL(url).pathname.split('/')[2];

		const date = moment.utc($(element).attr('release'), 'YYYY/MM/DD').toDate();

		const sceneId = $(element).attr('data-content');
		const posterElement = $(element).find('.thumbnail-avatar');

		const poster = getPoster(posterElement, sceneId);

		return {
			url,
			shootId,
			entryId,
			title,
			date,
			poster,
		};
	});
}

async function scrapeScene(html, url, site, useGallery) {
	const $ = cheerio.load(html, { normalizeWhitespace: true });
	const playerObject = $('script:contains("new WatchPage")').html();
	const playerData = playerObject && playerObject.slice(playerObject.indexOf('{"swf":'), playerObject.lastIndexOf('},') + 1);
	const data = playerData && JSON.parse(playerData);

	const release = { url };

	const originalTitle = $('h1.watchpage-title').text().trim();
	const { shootId, title } = extractTitle(originalTitle);

	release.shootId = shootId;
	release.entryId = new URL(url).pathname.split('/')[2];

	release.title = title;
	release.date = moment.utc($('span[title="Release date"] a').text(), 'YYYY-MM-DD').toDate();

	const [actorsElement, tagsElement, descriptionElement] = $('.scene-description__row').toArray();

	release.description = $('meta[name="description"]')?.attr('content')?.trim()
        || (descriptionElement && $(descriptionElement).find('dd').text().trim());

	release.actors = $(actorsElement)
		.find('a[href*="com/model"]')
		.map((actorIndex, actorElement) => $(actorElement).text()).toArray();

	release.duration = moment.duration($('span[title="Runtime"]').text().trim()).asSeconds();
	release.tags = $(tagsElement).find('a').map((tagIndex, tagElement) => $(tagElement).text()).toArray();

	const photos = useGallery
		? $('.gallery a img').map((photoIndex, photoElement) => $(photoElement).attr('src')).toArray()
		: $('.screenshots img').map((photoIndex, photoElement) => $(photoElement).attr('src')).toArray();

	release.photos = photos.map((source) => {
		// source without parameters sometimes serves larger preview photo
		const { origin, pathname } = new URL(source);

		return `${origin}${pathname}`;
	});

	const posterStyle = $('#player').attr('style');
	const poster = posterStyle.slice(posterStyle.indexOf('(') + 1, -1);

	release.poster = poster || release.photos.slice(Math.floor(release.photos.length / 3) * -1); // poster unavailable, try last 1/3rd of high res photos as fallback

	if (data) {
		const qualityMap = {
			web: 240,
			vga: 480,
			hd: 720,
			'1080p': 1080,
		};

		release.trailer = data.clip.qualities.map((trailer) => ({
			src: trailer.src,
			type: trailer.type,
			quality: qualityMap[trailer.quality] || trailer.quality,
		}));
	}

	const studioName = $('.watchpage-studioname').first().text().trim();
	release.studio = slugify(studioName, '');

	return release;
}

async function scrapeProfile(html, _url, actorName) {
	const { document } = new JSDOM(html).window;

	const profile = {
		name: actorName,
	};

	const avatarEl = document.querySelector('.model--avatar img[src^="http"]');
	const entries = Array.from(document.querySelectorAll('.model--description tr'), (el) => el.textContent.replace(/\n/g, '').split(':'));

	const bio = entries
		.filter((entry) => entry.length === 2) // ignore entries without ':' (About section, see Blanche Bradburry)
		.reduce((acc, [key, value]) => ({ ...acc, [key.trim()]: value.trim() }), {});

	profile.birthPlace = bio.Nationality;

	if (bio.Age) profile.age = bio.Age;
	if (avatarEl) profile.avatar = avatarEl.src;

	profile.releases = scrapeAll(html);

	return profile;
}

async function fetchLatest(site, page = 1) {
	const res = await http.get(`${site.url}/new-videos/${page}`);

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

async function fetchScene(url, site) {
	const useGallery = true;

	// TODO: fall back on screenshots when gallery is not available
	const res = useGallery
		? await http.get(`${url}/gallery#gallery`)
		: await http.get(`${url}/screenshots#screenshots`);

	return scrapeScene(res.body.toString(), url, site, useGallery);
}

async function fetchProfile({ name: actorName }) {
	const res = await http.get(`https://www.legalporno.com/api/autocomplete/search?q=${actorName.replace(' ', '+')}`);
	const data = res.body;

	const result = data.terms.find((item) => item.type === 'model');

	if (result) {
		const bioRes = await http.get(result.url);
		const html = bioRes.body.toString();

		return scrapeProfile(html, result.url, actorName);
	}

	return null;
}

module.exports = {
	fetchLatest,
	fetchProfile,
	fetchScene,
};