const { db, logger, file, parser } = require('../core')
const _ = require('lodash')
const dayjs = require('dayjs')
const utc = require('dayjs/plugin/utc')
dayjs.extend(utc)

let channels = []
let programs = []

const DB_DIR = process.env.DB_DIR || 'scripts/database'
const PUBLIC_DIR = process.env.PUBLIC_DIR || '.gh-pages'

async function main() {
  await setUp()

  await generateChannelsJson()
  await generateProgramsJson()
}

main()

async function setUp() {
  channels = await db.channels.find({}).sort({ xmltv_id: 1 })
  programs = await db.programs.find({})
}

async function generateChannelsJson() {
  logger.info('Generating channels.json...')

  let output = {}
  channels.forEach(channel => {
    if (!output[channel.xmltv_id]) {
      const countryCode = channel.xmltv_id.split('.')[1]

      output[channel.xmltv_id] = {
        id: channel.xmltv_id,
        name: [channel.name],
        logo: channel.logo || null,
        country: countryCode ? countryCode.toUpperCase() : null
      }
    } else {
      if (!output[channel.xmltv_id].logo && channel.logo) {
        output[channel.xmltv_id].logo = channel.logo
      }

      if (!output[channel.xmltv_id].name.includes(channel.name)) {
        output[channel.xmltv_id].name.push(channel.name)
      }
    }
  })

  await file.create(
    `${PUBLIC_DIR}/api/channels.json`,
    JSON.stringify(Object.values(output), null, 2)
  )
}

async function generateProgramsJson() {
  logger.info('Generating programs.json...')

  let items = programs

  items = _.sortBy(items, ['channel', 'start'])
  items = _.groupBy(items, 'channel')

  for (let channel in items) {
    let channelPrograms = items[channel]
    channelPrograms = Object.values(_.groupBy(channelPrograms, i => i.site))[0]
    let slots = _.groupBy(channelPrograms, i => `${i.start}_${i.stop}`)

    for (let slotId in slots) {
      let program = {
        channel,
        title: [],
        description: [],
        categories: [],
        image: null,
        start: null,
        stop: null
      }

      slots[slotId].forEach(item => {
        // program.site = item.site
        if (item.title) program.title.push({ lang: item.lang, value: item.title })
        if (item.description)
          program.description.push({
            lang: item.lang,
            value: item.description
          })
        if (item.category) program.categories.push({ lang: item.lang, value: item.category })
        program.image = program.image || item.icon
        program.start = item.start
        program.stop = item.stop
      })

      program.title = _.uniqBy(program.title, 'lang')
      program.description = _.uniqBy(program.description, 'lang')
      program.categories = _.uniqBy(program.categories, 'lang')

      slots[slotId] = program
    }

    items[channel] = Object.values(slots)
  }

  await file.create(`${PUBLIC_DIR}/api/programs.json`, JSON.stringify(items, null, 2))
}

// async function generateGuideXML() {
//   logger.info(`Generating guide.xml...`)

//   const channels = Object.keys(programs)
//   let items = await db.find({ xmltv_id: { $in: channels } })
//   items = _.sortBy(items, item => item.name)

//   let buffer = {}
//   items.forEach(item => {
//     if (!buffer[item.xmltv_id]) {
//       const countryCode = item.xmltv_id.split('.')[1]

//       buffer[item.xmltv_id] = {
//         id: item.xmltv_id,
//         display_name: [item.name],
//         logo: item.logo || null,
//         country: countryCode ? countryCode.toUpperCase() : null,
//         site: `https://${programs[item.xmltv_id][0].site}`
//       }
//     } else {
//       if (!buffer[item.xmltv_id].logo && item.logo) {
//         buffer[item.xmltv_id].logo = item.logo
//       }

//       if (!buffer[item.xmltv_id].display_name.includes(item.name)) {
//         buffer[item.xmltv_id].display_name.push(item.name)
//       }
//     }
//   })

//   items = Object.values(buffer)

//   let outputProgs = []
//   for (let ip of Object.values(programs)) {
//     outputProgs = outputProgs.concat(ip)
//   }

//   const xml = convertToXMLTV({ channels: items, programs: outputProgs })
//   await file.write('./guide.xml', xml)
// }

// function convertToXMLTV({ channels, programs }) {
//   let output = `<?xml version="1.0" encoding="UTF-8" ?><tv>\r\n`
//   for (let channel of channels) {
//     output += `<channel id="${escapeString(channel.id)}">`
//     channel.display_name.forEach(displayName => {
//       output += `<display-name>${escapeString(displayName)}</display-name>`
//     })
//     if (channel.logo) {
//       const logo = escapeString(channel.logo)
//       output += `<icon src="${logo}"/>`
//     }
//     output += `<url>${channel.site}</url>`
//     output += `</channel>\r\n`
//   }

//   for (let program of programs) {
//     if (!program) continue

//     const start = program.start ? dayjs.unix(program.start).utc().format('YYYYMMDDHHmmss ZZ') : ''
//     const stop = program.stop ? dayjs.unix(program.stop).utc().format('YYYYMMDDHHmmss ZZ') : ''
//     const icon = escapeString(program.icon)

//     if (start && stop) {
//       output += `<programme start="${start}" stop="${stop}" channel="${escapeString(
//         program.channel
//       )}">`

//       program.title.forEach(title => {
//         output += `<title lang="${title.lang}">${escapeString(title.value)}</title>`
//       })

//       program.description.forEach(description => {
//         output += `<desc lang="${description.lang}">${escapeString(description.value)}</desc>`
//       })

//       program.categories.forEach(category => {
//         output += `<category lang="${category.lang}">${escapeString(category.value)}</category>`
//       })

//       program.icons.forEach(icon => {
//         output += `<icon src="${icon}"/>`
//       })

//       output += '</programme>\r\n'
//     }
//   }

//   output += '</tv>'

//   return output
// }

// function escapeString(string, defaultValue = '') {
//   if (!string) return defaultValue

//   const regex = new RegExp(
//     '((?:[\0-\x08\x0B\f\x0E-\x1F\uFFFD\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]))|([\\x7F-\\x84]|[\\x86-\\x9F]|[\\uFDD0-\\uFDEF]|(?:\\uD83F[\\uDFFE\\uDFFF])|(?:\\uD87F[\\uDF' +
//       'FE\\uDFFF])|(?:\\uD8BF[\\uDFFE\\uDFFF])|(?:\\uD8FF[\\uDFFE\\uDFFF])|(?:\\uD93F[\\uDFFE\\uD' +
//       'FFF])|(?:\\uD97F[\\uDFFE\\uDFFF])|(?:\\uD9BF[\\uDFFE\\uDFFF])|(?:\\uD9FF[\\uDFFE\\uDFFF])' +
//       '|(?:\\uDA3F[\\uDFFE\\uDFFF])|(?:\\uDA7F[\\uDFFE\\uDFFF])|(?:\\uDABF[\\uDFFE\\uDFFF])|(?:\\' +
//       'uDAFF[\\uDFFE\\uDFFF])|(?:\\uDB3F[\\uDFFE\\uDFFF])|(?:\\uDB7F[\\uDFFE\\uDFFF])|(?:\\uDBBF' +
//       '[\\uDFFE\\uDFFF])|(?:\\uDBFF[\\uDFFE\\uDFFF])(?:[\\0-\\t\\x0B\\f\\x0E-\\u2027\\u202A-\\uD7FF\\' +
//       'uE000-\\uFFFF]|[\\uD800-\\uDBFF][\\uDC00-\\uDFFF]|[\\uD800-\\uDBFF](?![\\uDC00-\\uDFFF])|' +
//       '(?:[^\\uD800-\\uDBFF]|^)[\\uDC00-\\uDFFF]))',
//     'g'
//   )

//   string = String(string || '').replace(regex, '')

//   return string
//     .replace(/&/g, '&amp;')
//     .replace(/</g, '&lt;')
//     .replace(/>/g, '&gt;')
//     .replace(/"/g, '&quot;')
//     .replace(/'/g, '&apos;')
//     .replace(/\n|\r/g, ' ')
//     .replace(/  +/g, ' ')
//     .trim()
// }