'use strict';

const util = require('util');
const config = require('config');
const fetch = require('node-fetch');
const urlPattern = require('url-pattern');
const cheerio = require('cheerio');
const mime = require('mime-types');

const pattern = new urlPattern('https\\://(www.)vidble.com/:id(_med)(.:ext)');

function vidbleAlbum(post) {
    return fetch(`https://www.vidble.com/album/${post.host.id}`).then(res => {
        if(res.status !== 200) {
            throw new Error(`Could not fetch info for vidble album '${post.host.id}': '${res.error}'`);
        }

        return res.text();
    }).then(res => {
        const $ = cheerio.load(res);

        const title = $('h2').text();
        const imgUrls = $('img.img2').toArray().map(img => `https://vidble.com${img.attribs.src || img.attribs['data-original']}`);

        const extract = config.library.album.extractSingleItem && imgUrls.length === 1;

        if(extract) {
            console.log('\x1b[36m%s\x1b[0m', `Extracting single item from album '${post.title}' - ${res.link}`);
        }

        return {
            album: extract ? null : {
                id: post.host.id,
                url: post.url,
                title: post.title,
                datetime: post.datetime
            },
            items: imgUrls.map(url => {
                const components = pattern.match(url);
                const id = components.id.replace('_med', '');
                const mimetype = mime.lookup(components.ext);

                return {
                    extracted: extract,
                    id: id,
                    url: `https://vidble.com/${id}.${components.ext}`,
                    type: mimetype,
                    datetime: post.datetime
                };
            })
        };
    });
};

module.exports = vidbleAlbum;