'use strict';

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

const http = 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()
		.map((src) => ({
			src,
			expectType: {
				'binary/octet-stream': 'image/jpeg',
			},
		}));
}

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();
}

async function getTrailer(scene, channel, url) {
	const res = await http.post(`${channel.url}/graphql`, {
		operationName: 'getToken',
		variables: {
			videoId: scene.newId,
			device: 'trailer',
		},
		query: `
			query getToken($videoId: ID!, $device: Device!) {
				generateVideoToken(input: {videoId: $videoId, device: $device}) {
					p270 {
						token
						cdn
						__typename
					}
					p360 {
						token
						cdn
						__typename
					}
					p480 {
						token
						cdn
						__typename
					}
					p480l {
						token
						cdn
						__typename
					}
					p720 {
						token
						cdn
						__typename
					}
					p1080 {
						token
						cdn
						__typename
					}
					p2160 {
						token
						cdn
						__typename
					}
					hls {
						token
						cdn
						__typename
					}
					__typename
				}
			}
		`,
	}, {
		headers: {
			referer: url,
			origin: channel.url,
		},
	});

	if (res.ok && res.body.data?.generateVideoToken) {
		return [
			{
				src: res.body.data.generateVideoToken.p2160?.token,
				quality: 2160,
			},
			{
				src: res.body.data.generateVideoToken.p1080?.token,
				quality: 1080,
			},
			{
				src: res.body.data.generateVideoToken.p720?.token,
				quality: 720,
			},
			{
				src: res.body.data.generateVideoToken.p480?.token,
				quality: 480,
			},
			{
				src: res.body.data.generateVideoToken.p360?.token,
				quality: 360,
			},
			{
				src: res.body.data.generateVideoToken.p270?.token,
				quality: 270,
			},
		];
	}

	return null;
}

async function getPhotos(url) {
	const htmlRes = await http.get(url, {
		extract: {
			runScripts: 'dangerously',
		},
	});

	const state = htmlRes?.window.__APOLLO_STATE__;
	const key = Object.values(state.ROOT_QUERY).find((query) => query?.__ref)?.__ref;
	const data = state[key];

	console.log(data);

	if (!data) {
		return [];
	}

	return data.carousel.slice(1).map((photo) => photo.main?.[0].src).filter(Boolean);
}

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

		release.title = scene.title;

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

		release.date = moment.utc(scene.releaseDate).toDate();
		release.datePrecision = 'minute';

		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 = `${site.url}/videos${scene.targetUrl}`;

	release.date = moment.utc(scene.releaseDate).toDate();
	release.datePrecision = 'minute';

	release.actors = scene.models;

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

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

	return [release];
}

async function scrapeScene(data, url, site, baseRelease, options) {
	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.productionDate = moment.utc(scene.shootDate).toDate();
	release.datePrecision = 'minute';

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

	release.poster = getPosterFallbacks(scene.images.poster);

	// release.photos = data.pictureset.map(photo => photo.main[0]?.src).filter(Boolean);
	if (options.includePhotos) {
		release.photos = await getPhotos(url);
	}

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

	const trailer = await getTrailer(scene, site, url);
	if (trailer) release.trailer = trailer;

	release.chapters = data.video.chapters?.video.map((chapter) => ({
		tags: [chapter.title],
		time: chapter.seconds,
	}));

	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 http.get(url);

		if (res.status === 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 http.get(url);

	if (res.ok) {
		if (res.body.data.videos) {
			return scrapeAll(res.body.data.videos, site);
		}

		return [];
	}

	return res.status;
}

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

	if (res.ok) {
		if (res.body.data.nextScene) {
			return scrapeUpcoming(res.body.data.nextScene, site);
		}

		return [];
	}

	return res.status;
}

async function fetchScene(url, site, baseRelease, options) {
	const { origin, pathname } = new URL(url);
	const apiUrl = `${origin}/api/${pathname.split('/').slice(-1)[0]}`;

	const res = await http.get(apiUrl, {
		extract: {
			runScripts: 'dangerously',
		},
	});

	if (res.ok) {
		if (res.body.data) {
			return scrapeScene(res.body.data, url, site, baseRelease, options);
		}

		return null;
	}

	return res.status;
}

async function fetchProfile({ name: actorName }, { site }, include) {
	const origin = site.url;
	const actorSlug = slugify(actorName);
	const url = `${origin}/api/${actorSlug}`;
	const res = await http.get(url);

	if (res.ok) {
		if (res.body.data) {
			return scrapeProfile(res.body.data, origin, include.scenes);
		}

		return null;
	}

	return res.status;
}

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