class Communities
  require "yaml"

  @local_chapters = {}

  def self.local_chapters(locale)
    @local_chapters[locale] = local_chapter_for(locale)
  end

  class << self
    protected

    def local_chapter_for(locale)
      @local_chapters_index = load_local_chapters
      locale_dict = locale_dict_for(locale)
      localised_chapters = []
      @local_chapters_index.each do |chapter|
        id = chapter[:id]
        name = locale_dict.dig(id, "name") || chapter[:name]
        url = chapter[:url]
        localised_chapters.push({ :id => id, :name => name, :url => url })
      end
      localised_chapters
    end

    def load_local_chapters
      json_file = File.expand_path("node_modules/osm-community-index/dist/resources.json", Dir.pwd)
      community_index = JSON.parse(File.read(json_file))
      local_chapters = []
      community_index["resources"].each do |id, resource|
        resource.each do |key, value|
          next unless key == "type" && value == "osm-lc" && id != "OSMF"

          strings = resource["strings"]
          chapter_name = strings["community"] || strings["name"]
          url = strings["url"]
          local_chapters.push({ :id => id, :name => chapter_name, :url => url })
        end
      end
      local_chapters
    end

    def locale_dict_for(locale_in)
      locale = locale_in.to_s.tr("-", "_")
      full_local_path = File.expand_path("node_modules/osm-community-index/i18n/#{locale}.yaml", Dir.pwd)
      locale_dict = {}
      if File.exist?(full_local_path)
        locale_dict = YAML.safe_load(File.read(full_local_path))[locale]
      else
        shortened_locale = locale.split("_").first
        if shortened_locale != locale
          shortened_local_path = File.expand_path("node_modules/osm-community-index/i18n/#{shortened_locale}.yaml", Dir.pwd)
          locale_dict = YAML.safe_load(File.read(shortened_local_path))[shortened_locale] if File.exist?(shortened_local_path)
        end
      end
      locale_dict
    end
  end
end