'use strict';

const blake2 = require('blake2');
const knex = require('../knex');

const { ex, ctxa } = require('../utils/q');
const http = require('../utils/http');

async function getSiteSlugs() {
	return knex('sites')
		.pluck('sites.slug')
		.join('networks', 'networks.id', 'sites.network_id')
		.where('networks.slug', 'perfectgonzo');
}

function getHash(identifier) {
	const hash = blake2.createHash('blake2b', { digestLength: 8 });

	hash.update(Buffer.from(identifier));

	return hash.digest('hex');
}

function extractMaleModelsFromTags(tagContainer) {
	if (!tagContainer) {
		return [];
	}

	const tagEls = Array.from(tagContainer.childNodes, node => ({ type: node.nodeType, text: node.textContent.trim() })).filter(node => node.text.length > 0);
	const modelLabelIndex = tagEls.findIndex(node => node.text === 'Male Models');

	if (modelLabelIndex > -1) {
		const nextLabelIndex = tagEls.findIndex((node, index) => index > modelLabelIndex && node.type === 3);
		const maleModels = tagEls.slice(modelLabelIndex + 1, nextLabelIndex);

		return maleModels.map(model => model.text);
	}

	return [];
}

async function extractChannelFromPhoto(photo, metaSiteSlugs) {
	const siteSlugs = metaSiteSlugs || await getSiteSlugs();
	const channelMatch = photo.match(new RegExp(siteSlugs.join('|')));

	if (channelMatch) {
		return channelMatch[0];
	}

	return null;
}

async function scrapeLatest(html, site) {
	const siteSlugs = await getSiteSlugs();
	const { element } = ex(html);

	return ctxa(element, '#content-main .itemm').map(({
		q, qa, qlength, qdate, qimages,
	}) => {
		const release = {
			site,
			meta: {
				siteSlugs,
			},
		};

		const sceneLink = q('a');

		release.title = sceneLink.title;
		release.url = `${site.url}${sceneLink.href}`;
		release.date = qdate('.nm-date', 'MM/DD/YYYY');

		const slug = new URL(release.url).pathname.split('/')[2];
		release.entryId = getHash(`${site.slug}${slug}${release.date.toISOString()}`);

		release.actors = release.title.split('&').map(actor => actor.trim());

		[release.poster, ...release.photos] = qimages('.bloc-link img');

		release.tags = qa('.dropdown ul a', true).slice(1);
		release.duration = qlength('.dropdown p:first-child');

		return release;
	});
}

async function scrapeScene(html, site, url, metaSiteSlugs) {
	const {
		q, qa, qlength, qdate, qposter, qtrailer,
	} = ex(html);

	const release = { url, site };

	release.title = q('#movie-header h2', true);
	release.date = qdate('#movie-header div span', 'MMMM DD, YYYY', /\w+ \d{1,2}, \d{4}/);

	release.description = q('.container .mg-md', true);
	release.duration = qlength('#video-ribbon .container > div > span:nth-child(3)');

	release.actors = qa('#video-info a', true).concat(extractMaleModelsFromTags(q('.tag-container')));
	release.tags = qa('.tag-container a', true);

	const uhd = q('#video-ribbon .container > div > span:nth-child(2)', true);
	if (/4K/.test(uhd)) release.tags = release.tags.concat('4k');

	release.photos = qa('.bxslider_pics img').map(el => el.dataset.original || el.src);
	release.poster = qposter();

	const trailer = qtrailer();
	if (trailer) release.trailer = { src: trailer };

	if (release.photos.length > 0) release.channel = await extractChannelFromPhoto(release.photos[0], metaSiteSlugs);

	if (release.channel) {
		const { pathname } = new URL(url);
		release.url = `https://${release.channel}.com${pathname}`;

		const slug = pathname.split('/')[2];
		release.entryId = getHash(`${release.channel}${slug}${release.date.toISOString()}`);
	}

	return release;
}

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

	if (res.statusCode === 200) {
		return scrapeLatest(res.body.toString(), site);
	}

	return [];
}

async function fetchScene(url, site, release) {
	const res = await http.get(url);

	if (res.statusCode === 200) {
		return scrapeScene(res.body.toString(), site, url, release?.meta.siteSlugs);
	}

	return [];
}

module.exports = {
	fetchLatest,
	fetchScene,
};