'use strict'
let fetch = require('node-fetch')
let jsonfile = require('jsonfile')
let cheerio = require('cheerio')
let fs = require('fs')
let twilio = require('twilio')

const accountSid = process.env.TWILLIO_ACCOUNT_SID;
const authToken =  process.env.TWILLIO_AUTH_TOKEN;

if (!accountSid || !authToken) {
  console.error('TWILLIO ACCOUNT ID or TOKEN missing!')
  process.exit(-1);
}
const client = new twilio.RestClient(accountSid, authToken)

const kvadrataMax = 45
const url = `http://www.olx.ba/pretraga?id=23&kategorija=23&stranica=1&stanje=0&vrstapregleda=tabela&sort_order=desc&sort_po=datum&kanton=9&grad%5B%5D=3812&grad%5B%5D=5896&vrsta=samoprodaja&kvadrata_max=${kvadrataMax}`;


let data = {}

const receivers = ['+38761909238', '+38761818304'];

const sendSMSmessages = (url, price) => {
  receivers.forEach(receiver => {
    client.messages.create({
      body: `Na piku je izasao interesantan stan: ${url} - Cijena: ${price}`,
      to: receiver,
      from: '+12034335458'
    }, (err, message) => {
      if (!err) {
        console.log("Message sent to: ", receiver, message.sid);
      } else {
        console.log("Error while sending SMS to: ", receiver,  err);
      }
    })
  })
}

const start = () => {
  data = jsonfile.readFileSync('stanovi.json')
  console.log("Stanovi data successfully read: ", Object.keys(data).length, " objects")
  setInterval(async () =>  {

    console.log("doing");
    const res = await fetch(url);
    const body = await res.text();

    const $ = cheerio.load(body)
    let shouldSave = false
    $('#rezultatipretrage').find('.listitem').each((i, elem) => {
      const id = $(elem).find('a').first().attr('href')
      if (!data[id]) {
        const cijena = $(elem).find(".cijena > .datum > span").first().text()
        console.log('First time seen: ', id)
        data[id] = {
          seen: new Date(),
          price: cijena
        }
        shouldSave = true

        sendSMSmessages(id, cijena);
      }

    })

    if (shouldSave) {
      console.log("Syncing to the file...")
      jsonfile.writeFileSync('stanovi.json', data)
    }
  }, 60000);

}
start()