'use strict';

/* eslint-disable newline-per-chained-call */
const Promise = require('bluebird');
const moment = require('moment');

const { get, post } = require('../utils/http');
const slugify = require('../utils/slugify');

const genderMap = {
    F: 'female',
    M: 'male',
    T: 'transsexual', // not yet observed
};

function getPosterFallbacks(poster) {
    return poster
        .filter(image => /landscape/i.test(image.name))
        .sort((imageA, imageB) => imageB.height - imageA.height)
        .map((image) => {
            const sources = [image.src, image.highdpi?.['2x'], image.highdpi?.['3x']];
            // high DPI images for full HD source are huge, only prefer for smaller fallback sources
            return image.height === 1080 ? sources : sources.reverse();
        })
        .flat();
}

function getTeaserFallbacks(teaser) {
    return teaser
        .filter(video => /landscape/i.test(video.name))
        .map(video => ({
            src: video.src,
            type: video.type,
            quality: Number(String(video.height).replace('353', '360')),
        }));
}

function getAvatarFallbacks(avatar) {
    return avatar
        .sort((imageA, imageB) => imageB.height - imageA.height)
        .map(image => [image.highdpi?.['3x'], image.highdpi?.['2x'], image.src])
        .flat();
}

function scrapeAll(scenes, site, origin) {
    return scenes.map((scene) => {
        const release = {};

        release.title = scene.title;

        release.entryId = String(scene.newId);
        release.url = `${site?.url || origin}${scene.targetUrl}`;

        release.date = moment.utc(scene.releaseDate).toDate();
        release.shootDate = moment.utc(scene.shootDate).toDate();

        release.actors = scene.models;
        release.stars = Number(scene.textRating) / 2;

        release.poster = getPosterFallbacks(scene.images.poster);
        release.teaser = getTeaserFallbacks(scene.previews.poster);

        return release;
    });
}

function scrapeUpcoming(scene, site) {
    if (!scene || scene.isPreReleasePeriod) return null;

    const release = {};

    release.title = scene.targetUrl
        .slice(1)
        .split('-')
        .map(component => `${component.charAt(0).toUpperCase()}${component.slice(1)}`)
        .join(' ');

    release.url = `${site.url}${scene.targetUrl}`;

    release.date = moment.utc(scene.releaseDate).toDate();
    release.shootDate = moment.utc(scene.shootDate).toDate();

    release.actors = scene.models;

    release.poster = getPosterFallbacks(scene.images.poster);
    release.teaser = getTeaserFallbacks(scene.previews.poster);

    release.entryId = (release.poster[0] || release.teaser[0])?.match(/\/(\d+)/)?.[1];

    return [release];
}

async function scrapeScene(data, url, site, baseRelease) {
    const scene = data.video;

    const release = {
        url,
        title: scene.title,
        description: scene.description,
        actors: scene.models,
        director: scene.directorNames,
        duration: scene.runLength,
        stars: scene.totalRateVal,
        tags: scene.tags,
    };

    release.entryId = scene.newId;

    release.date = moment.utc(scene.releaseDate).toDate();
    release.shootDate = moment.utc(scene.shootDate).toDate();

    release.actors = baseRelease?.actors || scene.models;

    release.poster = getPosterFallbacks(scene.images.poster);
    release.photos = data.pictureset.map(photo => photo.main[0].src);

    release.teaser = getTeaserFallbacks(scene.previews.poster);

    const qualities = [360, 480, 720, 1080, 2160];
    const trailersUrl = `${site.url}/api/__tkn/${scene.previewVideoUrl1080P}/trailer/${qualities.join('+')}`;
    const trailersRes = await post(trailersUrl, null, { headers: { referer: url } });

    if (trailersRes.code === 200) {
        release.trailer = qualities.map(quality => (trailersRes.body[quality] ? {
            src: trailersRes.body[quality].token,
            quality,
        } : null)).filter(Boolean);
    }

    return release;
}

async function fetchActorReleases(pages, model, origin) {
    const releasesPerPage = await Promise.map(pages, async (page) => {
        const url = `${origin}/api${model.targetUrl}?page=${page}`;
        const res = await get(url);

        if (res.code === 200) {
            return scrapeAll(res.body.data.videos.videos, null, origin);
        }

        return [];
    }, { concurrency: 3 });

    return releasesPerPage.flat();
}

async function scrapeProfile(data, origin, withReleases) {
    const model = data.model;
    const profile = {};

    profile.birthdate = new Date(model.dateOfBirth);
    profile.gender = genderMap[model.sex];

    profile.hair = model.hairColour;
    profile.nationality = model.nationality;

    if (model.biography.trim().length > 0) profile.description = model.biography;

    if (model.cupSize && model.bustMeasurment) profile.bust = `${model.bustMeasurment}${model.cupSize}`;
    if (model.waistMeasurment) profile.waist = model.waistMeasurment;
    if (model.hipMeasurment) profile.hip = model.hipMeasurment;

    profile.avatar = getAvatarFallbacks(model.images.listing);
    profile.poster = getAvatarFallbacks(model.images.profile);
    profile.banner = getAvatarFallbacks(model.images.poster);

    const releases = scrapeAll(data.videos.videos, null, origin);

    if (withReleases) {
        const pageCount = Math.ceil(data.videos.count / 6);
        const otherReleases = await fetchActorReleases((Array.from({ length: pageCount - 1 }, (value, index) => index + 2)), model, origin);

        profile.releases = [...releases, ...otherReleases];
    } else {
        profile.releases = releases;
    }

    return profile;
}

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

    if (res.code === 200) {
        return scrapeAll(res.body.data.videos, site);
    }

    return res.code;
}

async function fetchUpcoming(site) {
    const apiUrl = `${site.url}/api`;
    const res = await get(apiUrl);

    if (res.code === 200) {
        return scrapeUpcoming(res.body.data.nextScene, site);
    }

    return res.code;
}

async function fetchScene(url, site, baseRelease) {
    const { origin, pathname } = new URL(url);
    const apiUrl = `${origin}/api${pathname}`;

    const res = await get(apiUrl);

    if (res.code === 200) {
        return scrapeScene(res.body.data, url, site, baseRelease);
    }

    return res.code;
}

async function fetchProfile(actorName, scraperSlug, site, withReleases) {
    const origin = `https://www.${scraperSlug}.com`;
    const actorSlug = slugify(actorName);
    const url = `${origin}/api/${actorSlug}`;
    const res = await get(url);

    if (res.code === 200) {
        return scrapeProfile(res.body.data, origin, withReleases);
    }

    return null;
}

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