const axios = require('axios')
const cheerio = require('cheerio')
const dayjs = require('dayjs')
const utc = require('dayjs/plugin/utc')
const timezone = require('dayjs/plugin/timezone')
const customParseFormat = require('dayjs/plugin/customParseFormat')

dayjs.extend(utc)
dayjs.extend(timezone)
dayjs.extend(customParseFormat)

module.exports = {
  site: 'nos.pt',
  days: 2,
  url({ channel }) {
    return `https://www.nos.pt/particulares/televisao/guia-tv/Pages/channel.aspx?channel=${channel.site_id}`
  },
  async parser({ content, date }) {
    const programs = []
    const items = parseItems(content, date)
    date = date.subtract(1, 'd')
    for (let item of items) {
      const $item = cheerio.load(item)

      const channelAcronym = parseChannelAcronym(content)
      const programId = parseProgramId($item)
      const details = await loadProgramDetails(channelAcronym, programId)

      programs.push({
        title: details.title,
        description: details.description,
        icon: parseIcon(details),
        start: dayjs(details.start),
        stop: dayjs(details.stop)
      })
    }

    return programs
  },
  async channels() {
    const html = await axios
      .get('https://www.nos.pt/particulares/televisao/guia-tv/Pages/default.aspx')
      .then(r => r.data)
      .catch(console.log)

    const $ = cheerio.load(html)
    const items = $('#guide-filters > dl.dropdown-ord > dd > ul > li').toArray()

    return items.map(item => {
      const $item = cheerio.load(item)

      return {
        lang: 'pt',
        site_id: $item('.value').text().trim(),
        name: $item('a').clone().children().remove().end().text().trim()
      }
    })
  }
}

async function loadProgramDetails(channelAcronym, programId) {
  if (!channelAcronym || !programId) return {}
  const data = await axios
    .post(
      'https://www.nos.pt/_layouts/15/Armstrong/ApplicationPages/EPGGetProgramsAndDetails.aspx/GetProgramDetails',
      {
        programId,
        channelAcronym,
        hour: 'undefined',
        startHour: 'undefined',
        endHour: 'undefined'
      },
      {
        headers: {
          'content-type': 'application/json; charset=UTF-8'
        }
      }
    )
    .then(r => r.data)
    .catch(console.log)

  if (!data) return {}

  const [title, description, image, , , , start, stop] = data.d.split('_#|$_')

  return {
    title,
    description,
    image,
    start,
    stop
  }
}

function parseIcon(details) {
  return details.image ? `https://images.nos.pt/${details.image}` : null
}

function parseProgramId($item) {
  return $item('a').attr('id')
}

function parseChannelAcronym(content) {
  const $ = cheerio.load(content)

  return $('#channel-logo > img').attr('alt')
}

function parseItems(content, date) {
  const day = date.date()
  const $ = cheerio.load(content)

  return $(`#day${day} > ul > li`).toArray()
}