using UnityEngine;
using LuaFramework;
using BestHTTP;
using BestHTTP.WebSocket;
using System;
using System.Collections.Generic;
using Google.Protobuf;


namespace Net
{
    public delegate void OnNetOpen(ClientNet conn);
    public delegate void OnNetError(ClientNet conn);
    public delegate void OnNetClosed(ClientNet conn);

    public class ClientNet : MonoBehaviour
    {
        enum EventType
        {
            Open,
            Error,
            Closed,
            Read
        }

        private string uri;
        private WebSocket ws;
        private byte[] recvBuf = new byte[1024 * 64 * 3];
        private int recvBufLen = 0;
        public OnNetOpen OnOpen;
        public OnNetError OnError;
        public OnNetClosed OnClosed;
        private readonly object lockObj = new object();
        private Queue<KeyValuePair<EventType, object[]>> events = new Queue<KeyValuePair<EventType, object[]>>();
        public F6.MsgHandler msgHandler = new F6.MsgHandler(typeof(battle.cs.CMMessageId_e), typeof(battle.cs.SMMessageId_e));

        public void Init(string uri)
        {
            this.ws = new WebSocket(new Uri(uri));
            this.ws.OnOpen += this.OnWsOpen;
            this.ws.OnBinary += this.OnWsBinaryReceived;
            this.ws.OnError += this.OnWsError;
            this.ws.OnClosed += this.OnWsClosed;
        }

        public void Open()
        {
            this.ws.Open();
        }
        public void SendMsg<T>(T msg) where T : IMessage<T>
        {
            try
            {
                int msgId = this.msgHandler.GetCMMsgId(typeof(T));
                int packLen = msg.CalculateSize();
                const int magicCode = 21323;
                byte[] data = new byte[12 + packLen];
                data[0] = (byte)(packLen & 0xFF);
                data[1] = (byte)((packLen & 0xFFFF) >> 8);
                data[2] = (byte)(msgId & 0xFF);
                data[3] = (byte)((msgId & 0xFFFF) >> 8);
                data[4] = 0;
                data[5] = 0;
                data[6] = 0;
                data[7] = 0;
                data[8] = (byte)(magicCode & 0xFF);
                data[9] = (byte)((magicCode & 0xFFFF) >> 8);
                data[10] = 0;
                data[11] = 0;
                msg.ToByteArray().CopyTo(data, 12);
                this.ws.Send(data);
            }catch(Exception e)
            {
                int i = 0;
            }
        }

        private void OnWsOpen(WebSocket ws)
        {
            Debug.Log("ClientNet.OnOpen");
            this.AddEvent(EventType.Open, null);
        }

        private void OnWsBinaryReceived(WebSocket ws, byte[] data)
        {
            this.AddEvent(EventType.Read, new object[]{data.Clone()});
        }

        private void OnWsError(WebSocket ws, string reason)
        {
            Debug.Log("ClientNet.OnError");
            this.AddEvent(EventType.Error, null);
        }

        private void OnWsClosed(WebSocket ws, UInt16 code, string message)
        {
            Debug.Log("ClientNet.OnClosed");
            this.AddEvent(EventType.Closed, null);
        }

        private void AddEvent(EventType type, object[] args)
        {
            lock (this.lockObj)
            {
                this.events.Enqueue(new KeyValuePair<EventType, object[]>(type, args));
            }
        }

        void Update()
        {
            lock (this.lockObj)
            {
                while (this.events.Count > 0)
                {
                    this.DispatchEvent(this.events.Dequeue());
                }
            }
        }

        private void ParsePkt(byte[] data)
        {
            data.CopyTo(this.recvBuf, this.recvBufLen);
            this.recvBufLen += data.Length;
            while (this.recvBufLen >= 12) {
                ushort packLen = C6.Utils.ReadU16Le(this.recvBuf, 0);
                ushort msgId = C6.Utils.ReadU16Le(this.recvBuf, 2);
                uint seqId = C6.Utils.ReadU32Le(this.recvBuf, 4);
                ushort magicCode = C6.Utils.ReadU16Le(this.recvBuf, 8);
                ushort extLen = C6.Utils.ReadU16Le(this.recvBuf, 10);
                if (packLen + 12 > this.recvBufLen)
                {
                    break;
                }
                this.msgHandler.DispatchMsg(msgId, this.recvBuf, 12, packLen);
                for (int i = packLen + 12; i < this.recvBufLen; ++i)
                {
                    this.recvBuf[i - (packLen + 12)] = this.recvBuf[i];
                }
                this.recvBufLen -= 12 + packLen;
            }
        }

        private void DispatchEvent(KeyValuePair<EventType, object[]> e)
        {
            switch (e.Key)
            {
                case EventType.Open:
                    {
                        if (this.OnOpen != null)
                        {
                            this.OnOpen(this);
                        }
                    }
                    break;
                case EventType.Error:
                    {
                        if (this.OnError != null)
                        {
                            this.OnError(this);
                        }
                    }
                    break;
                case EventType.Closed:
                    {
                        if (this.OnClosed != null)
                        {
                            this.OnClosed(this);
                        }
                    }
                    break;
                case EventType.Read:
                    {
                        this.ParsePkt((byte[])e.Value[0]);
                    }
                    break;
            }
        }

    }

}