class OsmCommunityIndex
  require "yaml"

  @localised_strings = {}

  def self.community_index
    @community_index ||= community_index_from_json
  end

  def self.localised_strings(locale)
    @localised_strings[locale] ||= locale_hash_from_json(locale)
  end

  protected

  def self.community_index_from_json
    json_file = Rails.root.join("node_modules/osm-community-index/dist/resources.json")
    JSON.parse(File.read(json_file))
  end

  def self.locale_hash_from_json(locale_in)
    locale = locale_in.to_s.tr("-", "_")
    # try the passed in locale
    json = load_locale_json(locale)
    unless json.nil?
      return json
    end

    # now try it without it's country part (eg 'en' instead of 'en_GB')
    shortened_locale = locale.split("_").first
    unless shortened_locale === locale
      json = load_locale_json(shortened_locale)
      unless json.nil?
        return json
      end
    end

    # if nothing else works, then return "en"
    load_locale_json("en")
  end

  def self.load_locale_json(locale)
    json_path = Rails.root.join("node_modules/osm-community-index/i18n/#{locale}.yaml")
    if File.exist?(json_path)
      response = YAML.safe_load(File.read(json_path))[locale]
    else
      response = nil
    end
    response
  end

end