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

const rootUrl = 'http://news.163.com';

const config = {
    whole: {
        link: '/special/0001386F/rank_whole.html',
        title: '全站',
    },
    news: {
        link: '/special/0001386F/rank_news.html',
        title: '新闻',
    },
    entertainment: {
        link: '/special/0001386F/rank_ent.html',
        title: '娱乐',
    },
    sports: {
        link: '/special/0001386F/rank_sports.html',
        title: '体育',
    },
    money: {
        link: 'http://money.163.com/special/002526BH/rank.html',
        title: '财经',
    },
    tech: {
        link: '/special/0001386F/rank_tech.html',
        title: '科技',
    },
    auto: {
        link: '/special/0001386F/rank_auto.html',
        title: '汽车',
    },
    lady: {
        link: '/special/0001386F/rank_lady.html',
        title: '女人',
    },
    house: {
        link: '/special/0001386F/rank_house.html',
        title: '房产',
    },
    game: {
        link: '/special/0001386F/game_rank.html',
        title: '游戏',
    },
    travel: {
        link: '/special/0001386F/rank_travel.html',
        title: '旅游',
    },
    edu: {
        link: '/special/0001386F/rank_edu.html',
        title: '教育',
    },
};

const timeRange = {
    hour: {
        index: 0,
        title: '1小时',
    },
    day: {
        index: 1,
        title: '24小时',
    },
    week: {
        index: 2,
        title: '本周',
    },
    month: {
        index: 3,
        title: '本月',
    },
};

module.exports = async (ctx) => {
    const category = ctx.params.category || 'whole';
    const type = ctx.params.type || 'click';
    const time = ctx.params.time || 'day';

    const cfg = config[category];
    if (!cfg) {
        throw Error('Bad category. See <a href="https://docs.rsshub.app/new-media.html#wang-yi-xin-wen-pai-hang-bang">docs</a>');
    } else if ((category !== 'whole' && type === 'click' && time === 'month') || (category === 'whole' && type === 'click' && time === 'hour') || (type === 'follow' && time === 'hour')) {
        throw Error('Bad timeRange range. See <a href="https://docs.rsshub.app/new-media.html#wang-yi-xin-wen-pai-hang-bang">docs</a>');
    }

    const currentUrl = category === 'money' ? cfg.link : `${rootUrl}${cfg.link}`;
    const response = await got({
        method: 'get',
        url: currentUrl,
        responseType: 'buffer',
    });

    const $ = cheerio.load(iconv.decode(response.data, 'gbk'));

    const list = $('div.tabContents')
        .eq(timeRange[time].index + (category === 'whole' ? (type === 'click' ? -1 : 2) : type === 'click' ? 0 : 2))
        .find('table tbody tr td a')
        .map((_, item) => {
            item = $(item);

            return {
                link: item.attr('href'),
            };
        })
        .get();

    const items = await Promise.all(
        list.map((item) =>
            ctx.cache.tryGet(item.link, async () => {
                try {
                    const category = item.link.split('.163.com')[0].split('//').pop().split('.').pop();
                    const link = `https://3g.163.com/${category}/article/${item.link.split('/').pop()}`;

                    const detailResponse = await got({
                        method: 'get',
                        url: link,
                    });
                    const content = cheerio.load(detailResponse.data);

                    content('.bot_word').remove();
                    content('video').each(function () {
                        content(this).attr('src', content(this).attr('data-src'));
                    });

                    item.title = content('meta[property="og:title"]').attr('content').replace('_手机网易网', '');
                    item.pubDate = parseDate(content('meta[property="og:release_date"]').attr('content'));
                    item.description = content('.content').html();
                } catch (err) {
                    return Promise.resolve('');
                }

                return item;
            })
        )
    );

    for (let i = 0; i < items.length; i++) {
        if (items[i] === undefined) {
            items.splice(i, 1);
        } else if (items[i].title === undefined) {
            items.splice(i, 1);
        }
    }

    ctx.state.data = {
        title: `网易新闻${timeRange[time].title}${type === 'click' ? '点击' : '跟帖'}榜 - ${cfg.title}`,
        link: currentUrl,
        item: items,
    };
};