using UnityEngine;
using Unity.Networking.Transport;
using KairoEngine.Core;

namespace KairoEngine.Multiplayer
{
    public class ClientBehaviour : MonoBehaviour
    {
        
        public string address = "192.168.1.1";
        public ushort port = 9000;
        public string playerName = "Player 1";
        public bool autoConnect = true;
        public string eventStreamName = "ClientEvents";
        public bool debug = false;

        public NetworkDriver m_Driver;
        public NetworkConnection m_Connection;
        public bool m_Done;

        void Start ()
        {
            if(autoConnect) ConnectToServer();
        }

        public void ConnectToServer()
        {
            m_Driver = NetworkDriver.Create();
            m_Connection = default(NetworkConnection);
            var endpoint = NetworkEndPoint.Parse(address, port);
            m_Connection = m_Driver.Connect(endpoint);
            if(debug) Debug.Log($"Client Connecting to <b>{address}:{port}</b>");
            GenericEvents.Trigger($"{eventStreamName}_Connecting", $"Connecting to <b>{address}:{port}</b>");
        }

        public void DisconnectFromServer()
        {
            NetDisconnectMsg netDisconnectMsg = new NetDisconnectMsg();
            SendNetMsgToServer((uint)NetOpCode.Disconnect, netDisconnectMsg);
            Timer.ExecuteRealTime(500, () => {
                if(debug) Debug.Log("Client disconnected from server");
                GenericEvents.Trigger($"{eventStreamName}_Disconected", "Client disconnected from server");
                m_Connection = default(NetworkConnection);
                if(m_Driver.IsCreated) m_Driver.Dispose();
            });
            
        }

        public void SendNetMsgToServer(uint code, NetMsg netMsg)
        {
            DataStreamWriter writer = new DataStreamWriter();
            m_Driver.BeginSend(m_Connection, out writer);
            NetMsgController.Serialize(code, netMsg, ref writer, this);
            m_Driver.EndSend(writer);
        }

        public void OnDestroy()
        {
            if(m_Driver.IsCreated) m_Driver.Dispose();
        }

        void Update()
        {
            if(!m_Driver.IsCreated) return;
            m_Driver.ScheduleUpdate().Complete();

            if (!m_Connection.IsCreated)
            {
                if (!m_Done)
                {
                    if(debug) Debug.Log("Something went wrong during connect");
                    GenericEvents.Trigger($"{eventStreamName}_ErrorConnecting", "Error connecting to server");
                    m_Done = true;
                }
                return;
            }

            DataStreamReader stream;
            NetworkEvent.Type cmd;

            while ((cmd = m_Connection.PopEvent(m_Driver, out stream)) != NetworkEvent.Type.Empty)
            {
                if (cmd == NetworkEvent.Type.Connect)
                {
                    if(debug) Debug.Log("We are now connected to the server");
                    GenericEvents.Trigger($"{eventStreamName}_Connected", "Connected to server");
                }
                else if (cmd == NetworkEvent.Type.Data)
                {
                    //if(debug) Debug.Log("Client received data from the server");
                    uint code = stream.ReadByte();
                    NetMsgController.Deserialize(code, ref stream, this);
                }
                else if (cmd == NetworkEvent.Type.Disconnect)
                {
                    if(debug) Debug.Log("Client got disconnected from server");
                    GenericEvents.Trigger($"{eventStreamName}_ServerDisconnected", "Client got disconnected from server");
                    m_Connection = default(NetworkConnection);
                }
            }
        }
    }
}