import { Route } from '@/types';
import cache from '@/utils/cache';
import got from '@/utils/got';
import { load } from 'cheerio';
import { parseDate } from '@/utils/parse-date';

const titles = {
    title: {
        en: 'Hong Kong Centre for Health Protection',
        zh_cn: '香港卫生防护中心',
        zh_tw: '香港衛生防護中心',
    },
    important_ft: {
        en: 'Important Topics',
        zh_cn: '重要资讯',
        zh_tw: '重要資訊',
    },
    press_data_index: {
        en: 'Press Releases',
        zh_cn: '新闻稿',
        zh_tw: '新聞稿',
    },
    ResponseLevel: {
        en: 'Response Level',
        zh_cn: '应变级别',
        zh_tw: '應變級別',
    },
    publication: {
        en: 'Periodicals & Publications',
        zh_cn: '期刊及刊物',
        zh_tw: '期刊及刊物',
    },
    HealthAlert: {
        en: 'Health Notice',
        zh_cn: '健康通告',
        zh_tw: '健康通告',
    },
};

export const route: Route = {
    path: '/chp/:category?/:language?',
    radar: [
        {
            source: ['dh.gov.hk/'],
        },
    ],
    name: 'Unknown',
    maintainers: ['nczitzk'],
    handler,
    url: 'dh.gov.hk/',
};

async function handler(ctx) {
    const languageCodes = {
        en: 'en',
        zh_cn: 'sc',
        zh_tw: 'tc',
    };

    const category = ctx.req.param('category') ?? 'important_ft';
    const language = ctx.req.param('language') ?? 'zh_tw';

    const rootUrl = 'https://www.chp.gov.hk';
    const apiUrl = `${rootUrl}/js/${category}.js`;
    const currentUrl = `${rootUrl}/${languageCodes[language]}${category === 'press_data_index' ? '/media/116' : ''}/index.html`;

    const response = await got({
        method: 'get',
        url: apiUrl,
    });

    const list = JSON.parse(response.data.match(/"data":(\[{.*}])}/)[1]).map((item) => {
        let link = '';

        if (item.UrlPath_en) {
            link = item[`UrlPath_${language}`].includes('http') ? item[`UrlPath_${language}`] : `${rootUrl}${item[`UrlPath_${language}`]}`;
        } else if (category === 'ResponseLevel' && item.FilePath_en) {
            link = item[`FilePath_${language}`].includes('http') ? item[`FilePath_${language}`] : `${rootUrl}${item[`FilePath_${language}`]}`;
        } else {
            link = `${rootUrl}/${languageCodes[language]}/${category === 'publication' ? 'guideline' : 'features'}/${item.InfoBlockID}.html`;
        }

        return {
            link,
            pubDate: parseDate(item.PublishDate),
            description: item[`Content_${language}`] ?? '',
            title: item[`Title_${language}`]?.replace(/<.*>/, '') ?? '',
        };
    });

    const items = await Promise.all(
        list.map((item) =>
            cache.tryGet(item.link, async () => {
                if ((category === 'important_ft' || category === 'press_data_index') && (item.link.indexOf('htm') > 0 || item.link.indexOf('/features/') > 0)) {
                    const detailResponse = await got({
                        method: 'get',
                        url: item.link,
                    });

                    const content = load(detailResponse.data);

                    content('#btmNav, script').remove();
                    content('.contHeader, .title_display_date').remove();
                    content('.printBtn, .bookmarkBtn, .qrBtn, .qr-content').remove();

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

    return {
        title: `${titles[category][language]} - ${titles.title[language]}`,
        link: currentUrl,
        item: items,
    };
}