# Copyright (C) 2012-2016 Zammad Foundation, http://zammad-foundation.org/

class Locale < ApplicationModel

=begin

get locals to sync

all:

  Locale.to_sync

returns

 ['en-us', 'de-de', ...]

=end

  def self.to_sync
    locales = Locale.where(active: true)
    if Rails.env.test?
      locales = Locale.where(active: true, locale: ['en-us'])
    end

    # read used locales based on env, e. g. export Z_LOCALES='en-us:de-de'
    if ENV['Z_LOCALES']
      locales = Locale.where(active: true, locale: ENV['Z_LOCALES'].split(':') )
    end
    locales
  end

=begin

sync locales from local if exists, otherwise from online

all:

  Locale.sync

=end

  def self.sync
    return true if load_from_file
    load
  end

=begin

load locales from online

all:

  Locale.load

=end

  def self.load
    data = fetch
    to_database(data)
  end

=begin

load locales from local

all:

  Locale.load_from_file

=end

  def self.load_from_file
    file = Rails.root.join('config/locales.yml')
    return false if !File.exist?(file)
    data = YAML.load_file(file)
    to_database(data)
    true
  end

=begin

fetch locales from remote and store them in local file system

all:

  Locale.fetch

=end

  def self.fetch
    url = 'https://i18n.zammad.com/api/v1/locales'

    result = UserAgent.get(
      url,
      {},
      {
        json: true,
      }
    )

    raise "Can't load locales from #{url}" if !result
    raise "Can't load locales from #{url}: #{result.error}" if !result.success?

    file = Rails.root.join('config/locales.yml')
    File.open(file, 'w') do |out|
      YAML.dump(result.data, out)
    end
    result.data
  end

  private_class_method def self.to_database(data)
    ActiveRecord::Base.transaction do
      data.each { |locale|
        exists = Locale.find_by(locale: locale['locale'])
        if exists
          exists.update(locale.symbolize_keys!)
        else
          Locale.create(locale.symbolize_keys!)
        end
      }
    end
  end

end