'use strict'

let fetch = require('node-fetch');
let cheerio = require('cheerio');
let fs = require('fs');
let cloudinary = require('cloudinary');
let FormData = require('form-data');

import {
  AD_TYPE_SALE,
  IGNORED_USERNAMES,
  CATEGORY_FLAT,
  CATEGORY_HOUSE,
  CATEGORY_OFFICE,
  CATEGORY_LAND
} from '../enums';

export default class ProstorCrawler {

  constructor(fromPage = 0, toPage = 10, maxResults = 1000) {
    this.fromPage = fromPage;
    this.toPage = toPage;
    this.maxResults = maxResults;
  }

  async indexSingle(url) {
    try {

      const res = await fetch(url);
      const body = await res.text();
      const $ = cheerio.load(body);

      console.log('bailing...');

      const title = $('#nav_center_sub > div.content_area_1_left > div:nth-child(1) > h1').text();

      const category = $('#nav_center_sub > div.content_area_1_left > div.bottom10 > div.content_lr_in_show > div:nth-child(3) > div:nth-child(4) > div.size_rs > span').text();


      const price = $('#nav_center_sub > div.content_area_1_left > div.bottom10 > div.content_lr_in_show > div:nth-child(1) > div.size_rs > strong').text();

      const size = $('#nav_center_sub > div.content_area_1_left > div.bottom10 > div.content_lr_in_show > div:nth-child(4) > div:nth-child(7) > div.size_rs > span').text();
      const rooms = $('#nav_center_sub > div.content_area_1_left > div.bottom10 > div.content_lr_in_show > div:nth-child(4) > div:nth-child(2) > div.size_rs > span').text();

      const address = $('#nav_center_sub > div.content_area_1_left > div.bottom10 > div.content_lr_in_show > div:nth-child(3) > div:nth-child(3) > div.size_rs > span').text();

      //const location = $('#artikal_glavni_div > div.artikal_lijevo > div.op.pop.mobile-lokacija').attr('data-content');

      //const adType = $('#artikal_glavni_div > div.artikal_lijevo > div:nth-child(15) > div:nth-child(2) > div.df2').text();

      const time = $('#nav_center_sub > div.content_area_1_right > div.bottom_d > div > strong:nth-child(1)').text();

      //const olxId = $('#artikal_glavni_div > div.artikal_lijevo > div:nth-child(15) > div:nth-child(4) > div.df2').text();

      const descriptions = $('#nav_center_sub > div.content_area_1_left > div.bottom10 > div.content_ll_in_show > div:nth-child(1)').text();


      const floor = $('#nav_center_sub > div.content_area_1_left > div.bottom10 > div.content_lr_in_show > div:nth-child(4) > div:nth-child(6) > div.size_rs').text();


      const latLngRe = /marker=([0-9]+\.[0-9]+)\,\s*([0-9]+\.[0-9]+)/g;

      //const latLngRe = /LatLng\(([0-9]+\.[0-9]+)\,\s+([0-9]+\.[0-9]+)\)/g;

      const matches = latLngRe.exec(body);
      let lng = '',
        lat = '';
      if (matches && matches.length >= 3) {
        lat = matches[1];
        lng = matches[2];
      }

      //console.log({
        //lat,
        //lng,
        //floor,
        //descriptions,
        //time,
        //price,
        //size,
        //category,
        //title
      //});

      //const imgRe = /href":("[^"]*")/g;

      const images = [];


      //const imgMatches = body.match(imgRe);

      const parseRooms = (rooms) => parseInt([...rooms].filter(c => !isNaN(c)).filter(c => c.trim()).join())
      const parsePrice = (price) => parseFloat(price.replace(".", ""))


      $('.fancybox').each((i, elem) => {
        const img = $(elem).attr('href');
        images.push(img);
      });

      //for (let i = 0; imgMatches && i < imgMatches.length; i++) {
        //let img = imgMatches[i].replace("href\":", "")
        //img = img.replace("\"", "");
        //img = img.replace("\"", "");
        //images.push(img);
      //}

      const uploadPromises = images.map(img => {
        return cloudinary.uploader.upload(img);
      });

      const uploadResults = await Promise.all(uploadPromises);
      const cloudinaryImages = uploadResults.map(ur => ur.url);


      const parsedPrice = parsePrice(price);
      let parsedRooms;

      if (rooms === 'Garsonjera') {
        parsedRooms = 0;
      } else {
        parsedRooms = parseRooms(rooms);
      }

      const data = {
        category: this.getCategoryId(category),
        url,
        title,
        price: isNaN(parsedPrice) ? price : parsedPrice,
        size: parseFloat(size),
        rooms: parsedRooms,
        floor: parseInt(floor),
        address,
        adType: AD_TYPE_SALE,
        time,
        shortDescription: title,
        longDescription: descriptions,
        lat,
        lng,
        loc: [parseFloat(lat), parseFloat(lng)],
        images: cloudinaryImages
      };
      console.log(data);

      return data;
    } catch (e) {
      console.error('Exception caught: ' + e.message);
    }

    return null;
  }

  async indexPage(pageNr, maxResults = 1000) {
    try {

      console.log('Starting to index page: ' + pageNr);
      const url = `http://prostor.ba/index.php`;

      const data = new FormData();
      data.append('sortCombo', 'e.date_create DESC');
      data.append('command', '');
      data.append('action', 'show');
      data.append('page', pageNr);
      data.append('param', 'ponuda.inc.php');
      data.append('checkNO', 0);
      data.append('order', 'e.date_create DESC');
      data.append('reset', 0);
      data.append('estate_action', 1);
      data.append('Itemid', 785);

      const res = await fetch(url, {
        method: 'POST',
        body: data
      });
      const body    = await res.text();
      const $       = cheerio.load(body);

      const hrefs = [];
      $('.nekret_box').each((i, elem) => {
        const href = $(elem).find("a").first().attr('href');
        hrefs.push(`http://prostor.ba/${href}`);
      });

      const results = {};
      for (const href of hrefs) {
        console.log(`indexing: ${href}`);

        const singleData = await this.indexSingle(href);

        if (singleData) {
          results[href] = singleData;
        }

        await this.sleep(500);
      }

      return results;
    } catch (e) {
      console.error('Exception caught:' + e);
    }
  }

  getCategoryId (category) {
    if (category === 'Stan') {
      return CATEGORY_FLAT;
    } else if (category === 'Zemljište') {
      return CATEGORY_LAND;
    } else if (category === 'Kuća') {
      return CATEGORY_HOUSE;
    } else if (category === 'Poslovni prostor') {
      return CATEGORY_OFFICE;
    }
  }

  async sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
  }

  async indexPages(start, end, maxResults = 1000) {
    let results = {};
    for (let i = start; i <= end; i++) {
      let result = await this.indexPage(i, maxResults);
      Object.assign(results, result)
      await this.sleep(5000);
    }
    return results;
  }

  async crawl() {
    let results = await this.indexPages(this.fromPage, this.toPage, this.maxResults);
    return results;
  }
}