import type { Cheerio, CheerioAPI } from 'cheerio';
import { load } from 'cheerio';
import type { Element } from 'domhandler';
import type { Context } from 'hono';

import type { Data, DataItem, Route } from '@/types';
import { ViewType } from '@/types';
import cache from '@/utils/cache';
import ofetch from '@/utils/ofetch';
import { parseDate } from '@/utils/parse-date';

export const handler = async (ctx: Context): Promise<Data> => {
    const { id = 'xwdt/gzdt' } = ctx.req.param();
    const limit: number = Number.parseInt(ctx.req.query('limit') ?? '17', 10);

    const baseUrl = 'https://www.samrdprc.org.cn';
    const targetUrl: string = new URL(id.endsWith('/') ? id : `${id}/`, baseUrl).href;

    const response = await ofetch(targetUrl);
    const $: CheerioAPI = load(response);
    const language = $('html').attr('lang') ?? 'zh';

    let items: DataItem[] = $('div.boxl_ul ul li')
        .slice(0, limit)
        .toArray()
        .map((el): Element => {
            const $el: Cheerio<Element> = $(el);
            const $aEl: Cheerio<Element> = $el.find('a').first();

            const title: string = $aEl.text();
            const pubDateStr: string | undefined = $el.find('span').text();
            const linkUrl: string | undefined = $aEl.attr('href');
            const upDatedStr: string | undefined = pubDateStr;

            const processedItem: DataItem = {
                title,
                pubDate: pubDateStr ? parseDate(pubDateStr) : undefined,
                link: linkUrl ? new URL(linkUrl, targetUrl).href : undefined,
                updated: upDatedStr ? parseDate(upDatedStr) : undefined,
                language,
            };

            return processedItem;
        });

    items = await Promise.all(
        items.map((item) => {
            if (!item.link) {
                return item;
            }

            return cache.tryGet(item.link, async (): Promise<DataItem> => {
                const detailResponse = await ofetch(item.link);
                const $$: CheerioAPI = load(detailResponse);

                const title: string = $$('div.show_tit').text();
                const description: string | undefined = $$('div.TRS_Editor div.TRS_Editor').html() ?? undefined;
                const pubDateStr: string | undefined = $$('div.show_tit2').text().split(/：/).pop()?.trim();
                const categories: string[] = $$('meta[name="keywords"]').attr('content')?.split(/,/) ?? [];
                const upDatedStr: string | undefined = pubDateStr;

                const processedItem: DataItem = {
                    title,
                    description,
                    pubDate: pubDateStr ? parseDate(pubDateStr) : item.pubDate,
                    category: categories,
                    content: {
                        html: description,
                        text: description,
                    },
                    updated: upDatedStr ? parseDate(upDatedStr) : item.updated,
                    language,
                };

                return {
                    ...item,
                    ...processedItem,
                };
            });
        })
    );

    return {
        title: $('title').text(),
        description: $('meta[name="description"]').attr('content'),
        link: targetUrl,
        item: items,
        allowEmpty: true,
        image: new URL('images/logo_DPRC.png', baseUrl).href,
        author: $('meta[name="keyword"]').attr('content')?.split(/,/)[0],
        language,
        id: $('meta[property="og:url"]').attr('content'),
    };
};

export const route: Route = {
    path: '/:id{.+}?',
    name: '栏目',
    url: 'www.samrdprc.org.cn',
    maintainers: ['nczitzk'],
    handler,
    example: '/samrdprc/xwdt/gzdt',
    parameters: {
        id: {
            description: '栏目 id，默认为 `xwdt/gzdt`，即国内新闻，可在对应分类页 URL 中找到',
            options: [
                {
                    label: '新闻动态',
                    value: 'xwdt/gzdt',
                },
                {
                    label: '网站公告',
                    value: 'wzgg',
                },
                {
                    label: '汽车召回',
                    value: 'qczh',
                },
                {
                    label: '消费品召回',
                    value: 'xfpzh',
                },
                {
                    label: '技术报告',
                    value: 'yjgz/jsyj',
                },
                {
                    label: 'SAC/TC463',
                    value: 'yjgz/sactc',
                },
                {
                    label: '研究动态',
                    value: 'yjgz/yjfx',
                },
                {
                    label: '安全教育',
                    value: 'aqjy',
                },
                {
                    label: '国内法规',
                    value: 'flfg/gnfg',
                },
            ],
        },
    },
    description: `::: tip
订阅 [网站公告](https://www.samrdprc.org.cn/wzgg/)，其源网址为 \`https://www.samrdprc.org.cn/wzgg/\`，请参考该 URL 指定部分构成参数，此时路由为 [\`/samrdprc/wzgg\`](https://rsshub.app/samrdprc/wzgg)。
:::

<details>
  <summary>更多分类</summary>

  #### 网站首页

  | [新闻动态](https://www.samrdprc.org.cn/xwdt/gzdt/) | [网站公告](https://www.samrdprc.org.cn/wzgg/) | [汽车召回](https://www.samrdprc.org.cn/qczh/) | [消费品召回](https://www.samrdprc.org.cn/xfpzh/) |
  | -------------------------------------------------- | --------------------------------------------- | --------------------------------------------- | ------------------------------------------------ |
  | [xwdt/gzdt](https://rsshub.app/samrdprc/xwdt/gzdt) | [wzgg](https://rsshub.app/samrdprc/wzgg)      | [qczh](https://rsshub.app/samrdprc/qczh)      | [xfpzh](https://rsshub.app/samrdprc/xfpzh)       |

  #### 科学研究

  | [技术报告](https://www.samrdprc.org.cn/yjgz/jsyj/) | [SAC/TC463](https://www.samrdprc.org.cn/yjgz/sactc/) | [研究动态](https://www.samrdprc.org.cn/yjgz/yjfx/) |
  | -------------------------------------------------- | ---------------------------------------------------- | -------------------------------------------------- |
  | [yjgz/jsyj](https://rsshub.app/samrdprc/yjgz/jsyj) | [yjgz/sactc](https://rsshub.app/samrdprc/yjgz/sactc) | [yjgz/yjfx](https://rsshub.app/samrdprc/yjgz/yjfx) |

  #### 安全教育

  | [安全教育](https://www.samrdprc.org.cn/aqjy/) |
  | --------------------------------------------- |
  | [aqjy](https://rsshub.app/samrdprc/aqjy)      |

  #### 法律法规

  | [国内法规](https://www.samrdprc.org.cn/flfg/gnfg/) |
  | -------------------------------------------------- |
  | [flfg/gnfg](https://rsshub.app/samrdprc/flfg/gnfg) |
</details>
`,
    categories: ['government'],
    features: {
        requireConfig: false,
        requirePuppeteer: false,
        antiCrawler: false,
        supportRadar: true,
        supportBT: false,
        supportPodcast: false,
        supportScihub: false,
    },
    radar: [
        {
            source: ['www.samrdprc.org.cn/:id'],
            target: '/:id',
        },
        {
            title: '网站首页 - 新闻动态',
            source: ['www.samrdprc.org.cn/xwdt/gzdt/'],
            target: '/xwdt/gzdt',
        },
        {
            title: '网站首页 - 网站公告',
            source: ['www.samrdprc.org.cn/wzgg/'],
            target: '/wzgg',
        },
        {
            title: '网站首页 - 汽车召回',
            source: ['www.samrdprc.org.cn/qczh/'],
            target: '/qczh',
        },
        {
            title: '网站首页 - 消费品召回',
            source: ['www.samrdprc.org.cn/xfpzh/'],
            target: '/xfpzh',
        },
        {
            title: '科学研究 - 技术报告',
            source: ['www.samrdprc.org.cn/yjgz/jsyj/'],
            target: '/yjgz/jsyj',
        },
        {
            title: '科学研究 - SAC/TC463',
            source: ['www.samrdprc.org.cn/yjgz/sactc/'],
            target: '/yjgz/sactc',
        },
        {
            title: '科学研究 - 研究动态',
            source: ['www.samrdprc.org.cn/yjgz/yjfx/'],
            target: '/yjgz/yjfx',
        },
        {
            title: '安全教育 - 安全教育',
            source: ['www.samrdprc.org.cn/aqjy/'],
            target: '/aqjy',
        },
        {
            title: '法律法规 - 国内法规',
            source: ['www.samrdprc.org.cn/flfg/gnfg/'],
            target: '/flfg/gnfg',
        },
    ],
    view: ViewType.Articles,
};
