const fetch = (...args) => import('node-fetch').then(({ default: fetch }) => fetch(...args))
const bidiFactory = require('bidi-js')
const bidi = bidiFactory()
const fs = require('fs')

const fileExtension = 'txt'

async function main() {
  try {
    const tsvRes = await fetch('https://docs.google.com/spreadsheets/d/1FoYdyEraEQuWofzbYCDPKN7EdKgS_2ZrsDrOA8scgwQ/export?format=tsv')
    const tsv = await tsvRes.text()

    const lines = tsv.split('\n')
    // First line contains full language names
    // Second line contains file extensions
    const codes = lines[1].split('\t')

    if (codes[0] == '')
      codes[0] = 'i18n'

    const outputFiles = []

    for (let j = 2; j < lines.length; j++) {
      const entries = lines[j].split('\t')

      if (entries.length > 1) {
        const key = entries[0]

        if (key) {
          for (let i = 0; i < codes.length; i++) {
            if (codes[i].trim()) {
              if (outputFiles[i] == null) {
                outputFiles[i] = '# *DO NOT DIRECTLY EDIT THIS FILE, IT IS AUTOMATICALLY GENERATED AND IT IS BASED ON:*\n'
                                                 + '# https://docs.google.com/spreadsheet/ccc?key=0AmQEO36liL4FdDJLWVNMaVV2UmRKSnpXU09MYkdGbEE\n'
              }

              if (codes[i] == 'i18n') {
                outputFiles[i] += `${key}=${key}\n`
              }
              else {
                let value = (entries.length > i) ? entries[i] : ''

                // Empty entries will be translated to English
                if (value == '')
                  value = entries[1]

                value = value.trim()

                // TODO Add encoding support
                /* if (PropGen.encodeValues)
                                {
                                    value = encodeString(value);
                                } */

                const lang = codes[i].toLowerCase()
                let rtl = false

                if (lang == 'ar' || lang == 'fa' || lang == 'he') {
                  const embeddingLevels = bidi.getEmbeddingLevels(value)

                  function isMixed(levels) {
                    for (let i = 0; i < levels.length; i++)
                      if (levels[i] == 1) return true

                    return false
                  };

                  if (embeddingLevels.paragraphs[0].level == 1 || isMixed(embeddingLevels.levels)) {
                    console.log(value)
                    rtl = true
                  }
                }

                if (rtl) {
                  outputFiles[i] += `${key}=` + `\u202B${value}\u202C` + '\n'
                }
                else {
                  // Checks for HTML entities in output
                  if (value.includes('<') || value.includes('>'))
                    console.log(`**** WARNING: HTML Entities in ${lang}/${key}=${value}`)

                  outputFiles[i] += `${key}=${value}\n`
                }
              }
            }
          }
        }
      }
    }

    const outDir = './resources'

    if (!fs.existsSync(outDir))
      fs.mkdirSync(outDir)

    for (let i = 0; i < codes.length; i++) {
      if (codes[i].trim()) {
        const ext = (codes[i] == 'en') ? '' : `_${codes[i].toLowerCase()}`
        const filename = `${outDir}/dia${ext}.${fileExtension}`
        fs.writeFileSync(filename, outputFiles[i], 'utf8')
        console.log(`${filename} created`)
      }
    }
  }
  catch (e) {
    console.log(e)
  }
}

main()