const axios = require('axios')
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: 'arirang.com',
  output: 'arirang.com.guide.xml',
  channels: 'arirang.com.channels.xml',
  lang: 'en',
  days: 7,
  delay: 5000,
  url: 'https://www.arirang.com/v1.0/open/external/proxy',

  request: {
    method: 'POST',
    timeout: 5000,
    cache: { ttl: 60 * 60 * 1000 },
    headers: {
      Accept: 'application/json, text/plain, */*',
      'Content-Type': 'application/json',
      Origin: 'https://www.arirang.com',
      Referer: 'https://www.arirang.com/schedule',
      'User-Agent':
        'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36'
    },
    data: function (context) {
      const { channel, date } = context
      return {
        address: 'https://script.arirang.com/api/v1/bis/listScheduleV3.do',
        method: 'POST',
        headers: {},
        body: {
          data: {
            dmParam: {
              chanId: channel.site_id,
              broadYmd: dayjs.tz(date, 'Asia/Seoul').format('YYYYMMDD'),
              planNo: '1'
            }
          }
        }
      }
    }
  },

  logo: function (context) {
    return context.channel.logo
  },

  async parser(context) {
    const programs = []
    const items = parseItems(context.content)

    for (let item of items) {
      const programDetail = await parseProgramDetail(item)

      programs.push({
        title: parseTitle(programDetail),
        start: parseStart(item),
        stop: parseStop(item),
        image: parseImage(programDetail),
        category: parseCategory(programDetail),
        description: parseDescription(programDetail)
      })
    }

    return programs
  }
}

function parseItems(content) {
  if (content != '') {
    const data = JSON.parse(content)
    return !data || !data.responseBody || !Array.isArray(data.responseBody.dsSchWeek)
      ? []
      : data.responseBody.dsSchWeek
  } else {
    return []
  }
}

function parseStart(item) {
  return dayjs.tz(item.broadYmd + ' ' + item.broadHm, 'YYYYMMDD HHmm', 'Asia/Seoul')
}

function parseStop(item) {
  return dayjs
    .tz(item.broadYmd + ' ' + item.broadHm, 'YYYYMMDD HHmm', 'Asia/Seoul')
    .add(item.broadRun, 'minute')
}

async function parseProgramDetail(item) {
  return axios
    .post(
      'https://www.arirang.com/v1.0/open/program/detail',
      {
        bis_program_code: item.pgmCd
      },
      {
        headers: {
          Accept: 'application/json, text/plain, */*',
          'Content-Type': 'application/json',
          Origin: 'https://www.arirang.com',
          Referer: 'https://www.arirang.com/schedule',
          'User-Agent':
            'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36'
        },
        timeout: 5000,
        cache: { ttl: 60 * 1000 }
      }
    )
    .then(response => {
      // console.log('Retrieved program detail: bis_program_code ' + item.pgmCd)
      return response.data
    })
    .catch(function () {
      // The provider/server may not have details on every single programs.
      // console.log('Unavailable program detail: bis_program_code ' + item.pgmCd)
    })
}

function parseTitle(programDetail) {
  if (programDetail && programDetail.title && programDetail.title[0] && programDetail.title[0].text) {
    return programDetail.title[0].text
  } else {
    return ''
  }
}

function parseImage(programDetail) {
  if (programDetail && programDetail.image && programDetail.image[0].url) {
    return programDetail.image[0].url
  } else {
    return ''
  }
}

function parseCategory(programDetail) {
  if (programDetail && programDetail.category_Info && programDetail.category_Info[0].title) {
    return programDetail.category_Info[0].title
  } else {
    return ''
  }
}

function parseDescription(programDetail) {
  if (
    programDetail &&
    programDetail.content &&
    programDetail.content[0] &&
    programDetail.content[0].text
  ) {
    let description = programDetail.content[0].text
    let regex = /(<([^>]+)>)/gi
    return description.replace(regex, '')
  } else {
    return ''
  }
}