#!/usr/bin/env node
const fs = require('fs')
const forEach = require('async-foreach').forEach

var all = {}
var allIds = []

function sortKeys (ob) {
  let result = {}
  let keys = Object.keys(ob)
  keys.sort()
  for (let i = 0; i < keys.length; i++) {
    result[keys[i]] = ob[keys[i]]
  }
  return result
}

/* read existing translation files in lang/ */
fs.readdir('lang', function (err, files) {
  forEach(files, function (f) {
    let m = f.match(/^(.*)\.json$/)
    if (!m) {
      return
    }

    let done = this.async()
    let lang = m[1]

    fs.readFile('lang/' + f, function (err, contents) {
      let data = JSON.parse(contents)

      for (let k in data) {
        let m = k.match(/^category:(.*)$/)
        if (m) {
          let id = m[1]

          if (!(id in all)) {
            all[id] = {}
          }

          all[id][lang] = data[k]
        }
      }

      done()
    })
  },
  writeCategories)
})

function writeSubCategories(categories, all) {
  categories.forEach(data => {
    if (!('type' in data)) {
      return
    }

    if (!('name' in data)) {
      data.name = {}
    }

    for (var lang in all[data.id]) {
      if (all[data.id][lang]) {
        data.name[lang] = all[data.id][lang]
      }
    }

    if (data.type && data.type === 'index') {
      writeSubCategories(data.subCategories, all)
    }
  })
}


function writeCategories () {
  fs.readdir(
    '.',
    function (err, files) {
      forEach(
        files,
        function (f) {
          if (f === 'package.json') {
            return
          }

          let m = f.match(/^(.*)\.json$/)
          if (!m) {
            return
          }

          let id = m[1]
          if (!(id in all)) {
            return
          }

          let done = this.async()

          fs.readFile(f, function (err, contents) {
            let data = JSON.parse(contents)

            if (!('name' in data)) {
              data.name = {}
            }

            for (var lang in all[id]) {
              if (all[id][lang]) {
                data.name[lang] = all[id][lang]
              }
            }

            if (data.type && data.type === 'index') {
              writeSubCategories(data.subCategories, all)
            }
            if (data.type && data.type === 'overpass') {
              if (data.lists) {
                for (let listId in data.lists) {
                  let list = data.lists[listId]
                  let langStrId = id + ':' + listId

                  for (var lang in all[langStrId]) {
                    if (all[langStrId][lang]) {
                      list.name[lang] = all[langStrId][lang]
                    }
                  }
                  list.name = sortKeys(list.name)
                }
              }
            }

            let result = {}
            data.name = sortKeys(data.name)

            fs.writeFile(
              f,
              JSON.stringify(data, null, '    ') + '\n',
              function (err, result) {
                done()
              }
            )
          })
        }
      )
    }
  )
}