# Copyright: Copyright 2009 Topic Maps Lab, University of Leipzig.
# License:   Apache License, Version 2.0

unless Object.const_defined?("Gem") && rtmgem = Gem.loaded_specs["rtm-activerecord"]
  rtm_path = File.expand_path(File.join(File.dirname(__FILE__), "../../../rtm/lib"))
  $LOAD_PATH.unshift rtm_path if File.directory?(rtm_path)
end
require 'rtm'

require 'uri'
require "rtm/activerecord/tmdm"
require "rtm/activerecord/persistent_code_output"
require "rtm/activerecord/tm_delegator"
require "rtm/activerecord/tm_set_delegator"
require "rtm/activerecord/tm_construct"
require "rtm/activerecord/topic_map"
require "rtm/activerecord/traverse_associations"
require "rtm/activerecord/topic"
require "rtm/activerecord/association_and_role"
require "rtm/activerecord/name_variant_occurrence"
require "rtm/activerecord/locators"
require "rtm/activerecord/set_wrapper"
require "rtm/activerecord/base"
require "rtm/activerecord/literal_index"
require "rtm/activerecord/topic_map_system"
require "rtm/validation"
require "rtm/helpers/locator"
require "rtm/helpers/no_output"
require "rtm/helpers/uri"

module RTM::AR
  module TraverseAssociations
  end

  class Topic
    require 'rtm/activerecord/sugar/topic/characteristics'
    require 'rtm/activerecord/sugar/topic/counterparts'
    require 'rtm/activerecord/sugar/topic/identifier_direct'
    require 'rtm/activerecord/sugar/topic/hash_access'
    require 'rtm/activerecord/sugar/topic/predefined_associations'
    require "rtm/activerecord/io/to_xtm2"
    require "rtm/activerecord/io/to_xtm1"
    require "rtm/activerecord/io/to_yaml"
    require "rtm/activerecord/io/to_string"
    require "rtm/activerecord/io/to_jtm"
    include RTM::AR::Sugar::Topic::Characteristics
    include RTM::AR::Sugar::Topic::Counterparts
    include RTM::AR::Sugar::Topic::IdentifierDirect
    include RTM::AR::Sugar::Topic::HashAccess
    include RTM::AR::Sugar::Topic::PredefinedAssociations
  end

  class Association
    require 'rtm/activerecord/sugar/association/hash_access'
    require 'rtm/activerecord/sugar/role/counterparts'
    include RTM::AR::Sugar::Association::HashAccess
    include RTM::AR::Sugar::Role::Counterparts
  end

  class ActiveRecord < RTM::Engine
    identifier :activerecord
    include RTM::AR::TopicMapSystem

    def initialize(params)
      super

      config = @params[:config]
      case config
      when :existing
        # do nothing, reuse existing active_record connection
      when nil
        # use the existing or externally configured connection
        connect unless connected?
      when :memory
        # explicityly connect to the sqlite3 in-memory backend
        connect
      when ::ActiveRecord::Base
        # when it is a class which extends ActiveRecord::Base, use the connection of this one.
        # FIXME: this is not implemented yet.
      when Array
        connect *config
      when Hash
        connect config
      else
        # fall through, like :existing
      end
    end
  end
end