require "securerandom"

module TAC
  class PracticeGameClock
    class ClockNet
      class Client
        TAG = "ClockNet|Client"
        CHUNK_SIZE = 4096
        PACKET_TAIL = "\r\n\n"

        attr_reader :uuid, :read_queue, :write_queue, :socket,
                    :packets_sent, :packets_received,
                    :data_sent, :data_received
        attr_accessor :sync_interval, :last_socket_error, :socket_error
        def initialize
          @uuid = SecureRandom.uuid
          @read_queue = []
          @write_queue = []

          @sync_interval = 100

          @last_socket_error = nil
          @socket_error = false
          @bound = false

          @packets_sent, @packets_received = 0, 0
          @data_sent, @data_received = 0, 0
        end

        def uuid=(id)
          @uuid = id
        end

        def socket=(socket)
          @socket = socket
          @bound = true

          listen
        end

        def listen
          Thread.new do
            while connected?
              # Read from socket
              while message_in = read
                if message_in.empty?
                  break
                else
                  log.i(TAG, "Read: " + message_in)

                  @read_queue << message_in

                  @packets_received += 1
                  @data_received += message_in.length
                end
              end

              sleep @sync_interval / 1000.0
            end
          end

          Thread.new do
            while connected?
              # Write to socket
              while message_out = @write_queue.shift
                write(message_out)

                @packets_sent += 1
                @data_sent += message_out.to_s.length
                log.i(TAG, "Write: " + message_out.to_s)
              end

              sleep @sync_interval / 1000.0
            end
          end
        end

        def sync(block)
          block.call
        end

        def handle_read_queue
          message = gets

          while message
            puts(message)

            log.i(TAG, "Writing to Queue: " + message)

            message = gets
          end
        end

        def socket_error?
          @socket_error
        end

        def connected?
          if closed? == true || closed? == nil
            false
          else
            true
          end
        end

        def closed?
          @socket.closed? if @socket
        end

        def write(message)
          begin
            @socket.puts("#{message}#{PACKET_TAIL}")
          rescue => error
            @last_socket_error = error
            @socket_error = true
            log.e(TAG, error.message)
            close
          end
        end

        def read
          begin
            message = @socket.gets
          rescue => error
            @last_socket_error = error
            @socket_error = true

            message = ""
          end


          return message.to_s.strip
        end

        def puts(message)
          @write_queue << message
        end

        def gets
          @read_queue.shift
        end

        def encode(message)
          return message
        end

        def decode(blob)
          return blob
        end

        def flush
          @socket.flush if socket
        end

        def close(reason = nil)
          write(reason) if reason
          @socket.close if @socket
        end
      end
    end
  end
end