require 'rails_helper'
require 'locale_file_walker'

describe "i18n integrity checks" do

  it 'should have an i18n key for all trust levels' do
    TrustLevel.all.each do |ts|
      expect(ts.name).not_to match(/translation missing/)
    end
  end

  it "needs an i18n key (description) for each Site Setting" do
    SiteSetting.all_settings.each do |s|
      next if s[:setting] =~ /^test/
      expect(s[:description]).not_to match(/translation missing/)
    end
  end

  it "needs an i18n key (notification_types) for each Notification type" do
    Notification.types.each_key do |type|
      next if type == :custom || type == :group_message_summary
      expect(I18n.t("notification_types.#{type}")).not_to match(/translation missing/)
    end
  end

  it "has valid YAML for client" do
    Dir["#{Rails.root}/config/locales/client.*.yml"].each do |f|
      locale = /.*\.([^.]{2,})\.yml$/.match(f)[1]
      client = YAML.load_file("#{Rails.root}/config/locales/client.#{locale}.yml")
      expect(client.count).to eq(1)
      expect(client[locale]).not_to eq(nil)
      expect(client[locale].count).to eq(2)
      expect(client[locale]["js"]).not_to eq(nil)
      expect(client[locale]["admin_js"]).not_to eq(nil)
    end
  end

  it "has valid YAML for server" do
    Dir["#{Rails.root}/config/locales/server.*.yml"].each do |f|
      locale = /.*\.([^.]{2,})\.yml$/.match(f)[1]
      server = YAML.load_file("#{Rails.root}/config/locales/server.#{locale}.yml")
      expect(server.count).to eq(1)
      expect(server[locale]).not_to eq(nil)
    end
  end

  it "does not overwrite another language" do
    Dir["#{Rails.root}/config/locales/*.yml"].each do |f|
      locale = /.*\.([^.]{2,})\.yml$/.match(f)[1] + ':'
      IO.foreach(f) do |line|
        line.strip!
        next if line.start_with? "#"
        next if line.start_with? "---"
        next if line.blank?
        expect(line).to eq locale
        break
      end
    end
  end

  describe 'English locale file' do
    locale_files = ['config/locales', 'plugins/**/locales']
                     .product(['server.en.yml', 'client.en.yml'])
                     .collect { |dir, filename| Dir["#{Rails.root}/#{dir}/#{filename}"] }
                     .flatten
                     .map { |path| Pathname.new(path).relative_path_from(Rails.root) }

    class DuplicateKeyFinder < LocaleFileWalker
      def find_duplicates(filename)
        @keys_with_count = {}

        document = Psych.parse_file(filename)
        handle_document(document)

        @keys_with_count.delete_if { |key, count| count <= 1 }.keys
      end

      protected

      def handle_scalar(node, depth, parents)
        super(node, depth, parents)

        key = parents.join('.')
        @keys_with_count[key] = @keys_with_count.fetch(key, 0) + 1
      end
    end

    module Pluralizations
      def self.load(path)
        whitelist = Regexp.union([/messages.restrict_dependent_destroy/])

        yaml = YAML.load_file("#{Rails.root}/#{path}")
        pluralizations = find_pluralizations(yaml['en'])
        pluralizations.reject! { |key| key.match(whitelist) }
        pluralizations
      end

      def self.find_pluralizations(hash, parent_key = '', pluralizations = Hash.new)
        hash.each do |key, value|
          if value.is_a? Hash
            current_key = parent_key.blank? ? key : "#{parent_key}.#{key}"
            find_pluralizations(value, current_key, pluralizations)
          elsif key == 'one' || key == 'other'
            pluralizations[parent_key] = hash
          end
        end

        pluralizations
      end
    end

    locale_files.each do |path|
      context path do
        it 'has no duplicate keys' do
          duplicates = DuplicateKeyFinder.new.find_duplicates("#{Rails.root}/#{path}")
          expect(duplicates).to be_empty
        end

        Pluralizations.load(path).each do |key, values|
          it "key '#{key}' has valid pluralizations" do
            expect(values.keys).to contain_exactly('one', 'other')
          end
        end
      end
    end
  end
end