const cheerio = require('cheerio');
const got = require('@/utils/got');

module.exports = async (ctx) => {
    const base = `https://www.nature.com`;
    const url = `${base}/nature/articles?type=research-highlight`;

    const res = await got.get(url);
    const $ = cheerio.load(res.data);
    const list = $('.border-bottom-1.pb20').get();

    const out = await Promise.all(
        list.slice(0, 2).map(async (item) => {
            const $ = cheerio.load(item);
            const title = $('h3 > a').text();
            const partial = $('h3 > a').attr('href');
            const address = `${base}${partial}`;
            const time = $('time').text();
            let author;
            if ($('.js-list-authors-3 li').length > 3) {
                author =
                    $('.js-list-authors-3 li')
                        .slice(0, 1)
                        .text() + ' et al.';
            } else {
                author = $('.js-list-authors-3 li').text();
            }
            const cache = await ctx.cache.get(address);
            if (cache) {
                return Promise.resolve(JSON.parse(cache));
            }
            const res = await got.get(address);
            const capture = cheerio.load(res.data);
            let figure = capture('figure .figure--bleed').html();
            if (figure === null) {
                figure = '';
            }
            let contents = capture('.article-item--open .article-item__body').html();
            if (contents === null) {
                contents = '';
            }
            const single = {
                title,
                author: author,
                description: figure + contents,
                link: address,
                guid: address,
                pubDate: new Date(time).toUTCString(),
            };
            ctx.cache.set(address, JSON.stringify(single));
            return Promise.resolve(single);
        })
    );
    ctx.state.data = {
        title: `Nature | Research Highlight`,
        description: `Nature, a nature research journal`,
        link: url,
        item: out,
    };
};