const got = require('@/utils/got');
const cheerio = require('cheerio');
const { parseDate } = require('@/utils/parse-date');

module.exports = async (ctx) => {
    const { category = 'sggpdbqk' } = ctx.params;
    const limit = ctx.query.limit ? parseInt(ctx.query.limit, 10) : 30;

    const rootUrl = 'https://www.mem.gov.cn';
    const currentUrl = new URL(`gk/sgcc/${category}`, rootUrl).href;

    const { data: response } = await got(currentUrl);

    const $ = cheerio.load(response);

    let items = $('table.center_main02')
        .find('a[title]')
        .slice(0, limit)
        .toArray()
        .map((item) => {
            item = $(item);

            const regExp = new RegExp(`\\/sgcc\\/${category}\\/\\.\\.\\.`);
            const link = new URL(`${category}/${item.prop('href').replace(/\.\//, '')}`, currentUrl).href.replace(regExp, '');

            return {
                title: item.contents().first().text(),
                link,
                pubDate: parseDate(item.find('span').text()),
                enclosure_url: link,
                enclosure_type: `application/${link.split(/\./).pop()}`,
            };
        });

    items = await Promise.all(
        items.map((item) =>
            ctx.cache.tryGet(item.link, async () => {
                if (item.link.endsWith('html')) {
                    const { data: detailResponse } = await got(item.link);

                    const content = cheerio.load(detailResponse);

                    item.description = content('#content').html();
                }
                return item;
            })
        )
    );

    const icon = new URL($('link[rel="shortcut icon"]').prop('href'), rootUrl).href;

    ctx.state.data = {
        item: items,
        title: $('title').text(),
        link: currentUrl,
        description: $('meta[name="ColumnDescription"]').prop('content'),
        language: 'zh',
        image: new URL($('#imag').prop('src'), rootUrl).href,
        icon,
        logo: icon,
        subtitle: $('meta[name="ColumnName"]').prop('content'),
        author: $('meta[name="SiteName"]').prop('content'),
    };
};