import fs from 'fs/promises';
import _ from 'lodash';

import discogsService from './src/discogs';

async function start() {
    const discogs = discogsService();
    const wants = JSON.parse(await fs.readFile('./data/margh.wantlist.json', { encoding: 'utf8' }))
    console.log('wants', wants.length);


    const listings = await Promise.all(wants.map(async w => {
        try {
            const l = await discogs.listings(w.id)
            return l;
        } catch (e) {
            // console.error(e);
            return null;
        }
    }));


    // once we have all the listings
    // group by seller

    return _
        .chain(listings)
        .filter(l => l)
        .reduce((acc, g) => acc.concat(g), [])
        .map(l => ({
            id: l.id,
            description: l.release.description,
            seller_id: l.seller.id,
            seller_name: l.seller.username,
        }))
        .groupBy(l => l.seller_id)
        .sortBy(s => s.length)
        .reverse()
        .head()
        .value();
}

start()
    .then(r => console.log(r))
    .catch(e => {
        console.error(e);
        process.exit(1);
    });