# frozen_string_literal: true

module Discorb
  #
  # Handles application commands.
  #
  module ApplicationCommand
    # @return [Array<String>] List of valid locales.
    VALID_LOCALES = %w[
      da
      de
      en-GB
      en-US
      es-ES
      fr
      hr
      it
      lt
      hu
      nl
      no
      pl
      pt-BR
      ro
      fi
      sv-SE
      vi
      tr
      cs
      el
      bg
      ru
      uk
      hi
      th
      zh-CN
      ja
      zh-TW
      ko
    ].freeze

    module_function

    def modify_localization_hash(hash)
      hash.to_h do |rkey, value|
        key = rkey.to_s.gsub("_", "-")
        if VALID_LOCALES.none? { |valid| valid.downcase == key.downcase } &&
             key != "default"
          raise ArgumentError, "Invalid locale: #{key}"
        end

        [
          (
            if key == "default"
              "default"
            else
              VALID_LOCALES.find { |valid| valid.downcase == key.downcase }
            end
          ),
          value
        ]
      end
    end
  end
end