'use strict';

const bhttp = require('bhttp');
const cheerio = require('cheerio');
const moment = require('moment');

const knex = require('../knex');
const { matchTags } = require('../tags');

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

    return scenesElements.reduce((accReleases, element) => {
        const siteName = $(element).find('.studioName a').attr('title');

        if (site.parameters && site.parameters.filter && siteName.toLowerCase() !== site.name.toLowerCase()) {
            return accReleases;
        }

        const sceneLinkElement = $(element).find('.sceneTitle a');
        const url = `${site.url}${sceneLinkElement.attr('href')}`;
        const title = sceneLinkElement.attr('title').trim();

        const entryId = $(element).attr('data-itemid');

        const date = moment
            .utc($(element).find('.sceneDate').text(), 'MM-DD-YYYY')
            .toDate();

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

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

        return [
            ...accReleases,
            {
                url,
                entryId,
                title,
                actors,
                date,
                rating: {
                    likes,
                    dislikes,
                },
                site,
            },
        ];
    }, []);
}

async function scrapeScene(html, url, site) {
    const $ = cheerio.load(html, { normalizeWhitespace: true });
    const sceneElement = $('#videoWrapper');
    const json = $('script[type="application/ld+json"]').html();

    const data = JSON.parse(json)[0];
    const entryId = new URL(url).pathname.split('/').slice(-1)[0];

    const title = data.isPartOf ? data.isPartOf.name : data.name;
    const dataDate = moment.utc(data.dateCreated, 'YYYY-MM-DD');

    const date = dataDate.isValid()
        ? dataDate.toDate()
        : moment.utc(sceneElement.find('.updatedDate').text().trim(), 'MM-DD-YYYY').toDate();

    const actors = data.actor
        .sort(({ gender: genderA }, { gender: genderB }) => {
            if (genderA === 'female' && genderB === 'male') return -1;
            if (genderA === 'male' && genderB === 'female') return 1;

            return 0;
        })
        .map(actor => actor.name);

    const description = data.description || null; // prevent empty string
    const likes = Number(sceneElement.find('.rating .state_1 .value').text());
    const dislikes = Number(sceneElement.find('#infoWrapper .rating .state_2 .value').text());

    const duration = moment.duration(data.duration.slice(2).split(':')).asSeconds();

    const rawTags = data.keywords.split(', ');
    const siteName = data.productionCompany ? data.productionCompany.name : $('#logoLink a').attr('title');
    const siteId = siteName && siteName.replace(/\s+/g, '').toLowerCase();

    const [channelSite, tags] = await Promise.all([
        site.isFallback
            ? knex('sites')
                .where({ slug: siteId })
                .orWhereRaw('name = ? collate NOCASE', [siteName])
                .first()
            : site,
        matchTags(rawTags),
    ]);

    // only replace generic URL with site URL if site is not marked to fetch scenes from generic site
    const originalUrl = channelSite && !(channelSite.parameters && JSON.parse(channelSite.parameters).filter)
        ? `${channelSite.url}/en/video/${new URL(url).pathname.split('/').slice(-2).join('/')}`
        : url;

    return {
        url: originalUrl,
        entryId,
        title,
        date,
        actors,
        description,
        duration,
        tags,
        rating: {
            likes,
            dislikes,
        },
        site: channelSite || site,
    };
}

async function fetchLatest(site, page = 1) {
    const res = await bhttp.get(`${site.parameters && site.parameters.filter ? 'https://21sextury.com' : site.url}/en/videos/All-Categories/0/All-Pornstars/0/latest/${page}`);

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

async function fetchUpcoming(site) {
    const res = await bhttp.get(`${site.parameters && site.parameters.filter ? 'https://21sextury.com' : site.url}/en/videos/All-Categories/0/All-Pornstars/0/upcoming`);

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

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

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

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