import * as cheerio from "cheerio";
import { htmlRequestHeaders, redis, REDIS_CACHE_HOUR } from "../utils/server";
import type { ClubInfo, IEventInfo } from "../types";
import dayjs from "dayjs";

export class KaiqiuService {
  static #baseURL = 'https://kaiqiuwang.cc';

  public static async findClub(name: string, page = 1, normalClub?: boolean) {
    const searchKey = encodeURIComponent(name);
    const url = `${this.#baseURL}/home/space.php?province=&city=&searchkey=${searchKey}&searchsubmit=%E6%90%9C%E7%B4%A2&searchmode=1&do=mtag&view=hot&page=${page}`;
    const html = await fetch(url, {
      headers: htmlRequestHeaders,
    }).then(res => res.text());
    return this.parseSearchClubPage(html, Boolean(normalClub));
  }

  private static parseSearchClubPage(html: string, normal: boolean): {
    clubs: ClubInfo[];
    total: number;
  } {
    const $ = cheerio.load(html);
    const infos = $(`#content > div:nth-of-type(${normal ? 2 : 1}) td[width="250"]`).toArray();
    const imgs = $(`#content > div:nth-of-type(${normal ? 2 : 1}) td[width="80"]`).toArray();
    const parseInfo = (info: typeof infos[number], index: number): ClubInfo => {
      const name = $(info).find('a').text().trim();
      const url = $(info).find('a').attr('href') ?? '';
      const clubId = /-(?<id>\d+).html$/.exec(url)?.groups?.id?.toString() ?? '';
      const members = parseInt($(info).find('span.num').text().trim());
      const area = $(info).find('div.gray:nth-of-type(1)').text().trim();
      const src = $(imgs[index]).find('.threadimg60 img').attr('src')  ?? '';
      const img = src.startsWith('http') ? src : 'https://kaiqiuwang.cc/home/image/nologo.jpg';
      return { name, id: clubId, members, area, img, url: `${this.#baseURL}/home/${url}` };
    }
    const clubs = infos.map((e, i) => parseInfo(e, i));
    const total = parseInt($('#content > div:nth-of-type(1) div.page > em').text().trim()) || clubs.length;
    return { clubs, total };
  }

  public static async getClubInfo(clubId: string) {
    if (!clubId) return null;
    const url = `${this.#baseURL}/home/space-mtag-tagid-${clubId}.html`;
    const html = await fetch(url, { headers: htmlRequestHeaders }).then(res => res.text());
    const $ = cheerio.load(html);
    const name = $('h2.title a:nth-of-type(2)').text().trim();
    const src = $('#space_avatar img').attr('src') ?? '';
    const img = src.startsWith('http') ? src : 'https://kaiqiuwang.cc/home/image/nologo.jpg';
    const article = $('.article').text().trim();
    return { id: clubId, name, img, article };
  }

  static async #fetchEventListHTML(clubId: string, page: number) {
    const url = `https://kaiqiuwang.cc/home/space-0-do-mtag-tagid-${clubId}-view-event-page-${page}.html`;
    const resp = await fetch(url, { headers: htmlRequestHeaders });
    return resp.text();
  }

  public static async listClubEvents(clubId: string, page = 1) {
    if (!clubId) return {
      data: [],
      total: 0,
      location: {
        lat: 0,
        lng: 0,
      },
    };
    const key = `my-kaiqiuwang:club-events:${clubId}:page-${page}`;
    let html = await redis.get(key).catch(() => '');
    if (!html) {
      html = await this.#fetchEventListHTML(clubId, page);
      redis.setex(key, 60 * 60 * REDIS_CACHE_HOUR, html);
    }
    const location = await this.#getClubLocation(clubId);
    const data = await this.#parseEventList(html);
    return {
      ...data,
      location,
    }
  }

  static async #parseEventList(html: string) {
    const $ = cheerio.load(html);
    const blockList = $('div.event_list > ol > li');
    const list: IEventInfo[] = [];
    for (const block of blockList) {
      const titleEl = $(block).find('.event_title');
      const title = titleEl.text();
      const place = $(block).find('ul li:nth-of-type(2)').text().replace('比赛地点: \\t', '').trim();
      const eventPath = $(titleEl).find('a').attr('href') ?? '';
      const eventURL = `${this.#baseURL}/home/${eventPath}`;
      const matchId = /\S+-(\d+).html$/.exec(eventPath)?.[1] ?? '';
      const { startDate } = await this.getEventInfo(matchId);
      const event: IEventInfo = {
        title,
        info: [`比赛时间：${startDate}`, place],
        url: eventURL,
        startDate,
        matchId,
        isFinished: dayjs(startDate).isBefore(),
      }
      list.push(event);
    }
    const total = parseInt($('#mainarea > div.event_list > div > em').text().trim());
    return {
      data: list,
      total: total || list.length,
    };
  }

  static async #getClubLocation(clubId: string) {
    const url = `${this.#baseURL}/home/space-mtag-tagid-${clubId}-view-map.html`;
    const key = `my-kaiqiuwang:location:${clubId}`;
    let html: string = await redis.get(key) || '';
    if (!html) {
      html = await fetch(url, { headers: htmlRequestHeaders }).then(res => res.text());
      redis.setex(key, 60 * 60 * 24, html);
    }
    const $ = cheerio.load(html);
    const lng = Number($('#lng').val());
    const lat = Number($('#lat').val());
    return { lng, lat };
  }

  public static async getEventInfo(eventId: string) {
    let eventPage = await redis.get(`my-kaiqiuwang:match:${eventId}`) ?? '';
    // https://kaiqiuwang.cc/home/space-event-id-175775.html
    const eventURL = `${this.#baseURL}/home/space-event-id-${eventId}.html`;
    if (!eventPage) {
      eventPage = await fetch(eventURL, { headers: htmlRequestHeaders }).then(res => res.text() ?? '');
      await redis.setex(`my-kaiqiuwang:match:${eventId}`, 60 * 60 * 10, eventPage)
    }
    const $ = cheerio.load(eventPage);
    const eventContent = $('.event_content').text().replace(/(\r|\n)/g, ',').split(',').filter(Boolean).join(' ');
    const { y, M, D, H, m} = /比赛开始:.*?(?<y>\d{4})年(?<M>\d{2})月(?<D>\d{2})日 \w+ (?<H>\d{2}):(?<m>\d{2})/
      .exec(eventContent)?.groups ?? {};
    const startDate = y ? `${y}-${M}-${D} ${H}:${m}` : '';
    const title = $('#mainarea > h2 > a:nth-child(3)').text().trim();
    return {
      title,
      startDate,
      url: eventURL,
      isFinished: dayjs(startDate).isBefore(),
    }
  } 

}