using System.Threading.Tasks;
using System.IO;

namespace Passer.RoboidControl {

    public class IMessage {
        public IMessage() { }
        public IMessage(byte[] buffer) {
            Deserialize(buffer);
        }

        public virtual byte Serialize(ref byte[] buffer) { return 0; }
        public virtual void Deserialize(byte[] buffer) { }

        public bool SendTo(Participant client) {
            Serialize(ref client.buffer);
            return client.SendBuffer(client.buffer.Length);
        }

        public static bool SendMsg(Participant client, IMessage msg) {
            msg.Serialize(ref client.buffer);
            return client.SendBuffer(client.buffer.Length);
        }

        public static bool PublishMsg(Participant client, IMessage msg) {
            msg.Serialize(ref client.buffer);
            return client.PublishBuffer(client.buffer.Length);
        }

        public static async Task<byte[]> Receive(Stream dataStream, byte packetSize) {
            byte[] buffer = new byte[packetSize - 1]; //  without msgId
            int byteCount = dataStream.Read(buffer, 0, packetSize - 1);
            while (byteCount < packetSize - 1) {
                // not all bytes have been read, wait and try again
                await Task.Delay(1);
                byteCount += dataStream.Read(buffer, byteCount, packetSize - 1 - byteCount);
            }
            return buffer;
        }
    }

}