require 'test_helper'

class ActionCable::Connection::SubscriptionsTest < ActionCable::TestCase
  class Connection < ActionCable::Connection::Base
    attr_reader :websocket

    def send_async(method, *args)
      send method, *args
    end
  end

  class ChatChannel < ActionCable::Channel::Base
    attr_reader :room, :lines

    def subscribed
      @room = Room.new params[:id]
      @lines = []
    end

    def speak(data)
      @lines << data
    end
  end

  setup do
    @server = TestServer.new

    @chat_identifier = ActiveSupport::JSON.encode(id: 1, channel: 'ActionCable::Connection::SubscriptionsTest::ChatChannel')
  end

  test "subscribe command" do
    run_in_eventmachine do
      setup_connection
      channel = subscribe_to_chat_channel

      assert_kind_of ChatChannel, channel
      assert_equal 1, channel.room.id
    end
  end

  test "subscribe command without an identifier" do
    run_in_eventmachine do
      setup_connection

      @subscriptions.execute_command 'command' => 'subscribe'
      assert @subscriptions.identifiers.empty?
    end
  end

  test "unsubscribe command" do
    run_in_eventmachine do
      setup_connection
      subscribe_to_chat_channel

      channel = subscribe_to_chat_channel
      channel.expects(:unsubscribe_from_channel)

      @subscriptions.execute_command 'command' => 'unsubscribe', 'identifier' => @chat_identifier
      assert @subscriptions.identifiers.empty?
    end
  end

  test "unsubscribe command without an identifier" do
    run_in_eventmachine do
      setup_connection

      @subscriptions.execute_command 'command' => 'unsubscribe'
      assert @subscriptions.identifiers.empty?
    end
  end

  test "message command" do
    run_in_eventmachine do
      setup_connection
      channel = subscribe_to_chat_channel

      data = { 'content' => 'Hello World!', 'action' => 'speak' }
      @subscriptions.execute_command 'command' => 'message', 'identifier' => @chat_identifier, 'data' => ActiveSupport::JSON.encode(data)

      assert_equal [ data ], channel.lines
    end
  end

  test "unsubscribe from all" do
    run_in_eventmachine do
      setup_connection

      channel1 = subscribe_to_chat_channel

      channel2_id = ActiveSupport::JSON.encode(id: 2, channel: 'ActionCable::Connection::SubscriptionsTest::ChatChannel')
      channel2 = subscribe_to_chat_channel(channel2_id)

      channel1.expects(:unsubscribe_from_channel)
      channel2.expects(:unsubscribe_from_channel)

      @subscriptions.unsubscribe_from_all
    end
  end

  private
    def subscribe_to_chat_channel(identifier = @chat_identifier)
      @subscriptions.execute_command 'command' => 'subscribe', 'identifier' => identifier
      assert_equal identifier, @subscriptions.identifiers.last

      @subscriptions.send :find, 'identifier' => identifier
    end

    def setup_connection
      env = Rack::MockRequest.env_for "/test", 'HTTP_HOST' => 'localhost', 'HTTP_CONNECTION' => 'upgrade', 'HTTP_UPGRADE' => 'websocket'
      @connection = Connection.new(@server, env)

      @subscriptions = ActionCable::Connection::Subscriptions.new(@connection)
    end
end