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

namespace Passer.Control {

    public static class SiteServer {

        public static async Task ReceiveData(Stream dataStream, Client client) {
            while (true) {
                byte packetSize = (byte)dataStream.ReadByte();
                if (packetSize != 0xFF)
                    await ReceiveData(dataStream, client, packetSize);
                // else timeout
            }
        }

        public static async Task ReceiveData(Stream dataStream, Client client, byte packetSize) {
            byte msgId = (byte)dataStream.ReadByte();
            if (msgId == 0xFF) {
                // Timeout
                return;
            }

            //UnityEngine.Debug.Log($"R {msgId} from {client.ipAddress}");
            bool result = false;
            switch (msgId) {
                case ClientMsg.Id: // 0xA0 / 160
                    result = await ClientMsg.Receive(dataStream, client, packetSize);
                    break;
                case NetworkIdMsg.Id: // 0xA1 / 161
                    result = await NetworkIdMsg.Receive(dataStream, client, packetSize);
                    break;
                case InvestigateMsg.Id: // 0x81
                    result = await InvestigateMsg.Receive(dataStream, client, packetSize);
                    break;
                case ThingMsg.Id: // 0x80 / 128
                    result = await ThingMsg.Receive(dataStream, client, packetSize);
                    break;
                case NameMsg.Id: // 0x91 / 145
                    result = await NameMsg.Receive(dataStream, client, packetSize);
                    break;
                case ModelUrlMsg.Id: // 0x90 / 144
                    result = await ModelUrlMsg.Receive(dataStream, client, packetSize);
                    break;
                case PoseMsg.Id: // 0x10 / 16
                    result = await PoseMsg.Receive(dataStream, client, packetSize);
                    break;
                case CustomMsg.Id: // 0xB1 / 177
                    result = await CustomMsg.Receive(dataStream, client, packetSize);
                    break;
                case TextMsg.Id: // 0xB0 / 176
                    result = await TextMsg.Receive(dataStream, client, packetSize);
                    break;
                case DestroyMsg.Id: // 0x20 / 32
                    result = await DestroyMsg.Receive(dataStream, client, packetSize);
                    break;
                default:
                    break;
            }
            if (result == false) {
                packetSize = msgId; // skip 1 byte, msgId is possibly a packet size byte
                await ReceiveData(dataStream, client, packetSize);
            }
        }
    }
}