using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Networking.Transport;
using KairoEngine.Core;
using Sirenix.OdinInspector;

namespace KairoEngine.Multiplayer
{
    [HideMonoScript]
    public class ClientNetMsgController : NetMsgController
    {
        public ClientBehaviour client;
        public NetworkTick networkTick;
        
        private List<NetMsg> sendMsgBuffer = new List<NetMsg>();
        private List<NetMsg> receivedMsgBuffer = new List<NetMsg>();

        private void Start()
        {
            GetNetMessageTypes();
            networkTick.eventStreamName = client.eventStreamName;
        }

        private void OnEnable()
        {
            GenericEvents.StartListening($"{client.eventStreamName}_OnTick", OnTick);
            GenericEvents.StartListening($"{client.eventStreamName}_Connected", StartTickSystem);
        }        
        private void OnDisable()
        {
            GenericEvents.StopListening($"{client.eventStreamName}_OnTick", OnTick);
            GenericEvents.StopListening($"{client.eventStreamName}_Connected", StartTickSystem);
        }

        private void StartTickSystem(string text) => networkTick.StartTickSystem();

        public override void ReceiveData(ref DataStreamReader stream, ClientBehaviour client) 
        {
            uint tick = stream.ReadUInt();
            uint msgCount = stream.ReadByte();
            for (int i = 0; i < msgCount; i++)
            {
                uint code = stream.ReadByte();
                NetMsg msg = FindWithCode(code).ReceiveMessage(client, ref stream);
                receivedMsgBuffer.Add(msg);
            }
        }

        public override void SendData(uint code, NetMsg netMsg, ClientBehaviour client)
        {
            sendMsgBuffer.Add(netMsg);
        }

        private void OnTick(int tick)
        {
            SendBufferedData();
            ReadBufferedData();
        }

        private void SendBufferedData()
        {
            if(sendMsgBuffer.Count == 0) return;
            //Debug.Log("Sending buffered data from client to server");
            DataStreamWriter writer = new DataStreamWriter();
            client.m_Driver.BeginSend(client.m_Connection, out writer);
            writer.WriteUInt((uint)networkTick.tick); // Current Tick Header
            writer.WriteByte((byte)sendMsgBuffer.Count); // Message count Header
            for (int a = 0; a < sendMsgBuffer.Count; a++)
            {
                NetMsg netMsg = sendMsgBuffer[a];
                if(netMsg != null)
                {
                    NetMsg typeMsg = FindWithCode(netMsg.code);
                    if(typeMsg != null) typeMsg.SendMessage(client, netMsg, ref writer);
                    else Debug.LogError($"Could not find NetMsg with code {netMsg.code}");
                }
            }
            client.m_Driver.EndSend(writer);
            sendMsgBuffer.Clear();
        }

        private void ReadBufferedData()
        {
            for (int a = 0; a < receivedMsgBuffer.Count; a++)
            {
                NetMsg msg = receivedMsgBuffer[a];
                msg.ReadMessage(client);
            }
            receivedMsgBuffer.Clear();
        }
    }
}