using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Web.UI.WebControls.WebParts;
using TeamAAS_VP.Enums;
using TeamAAS_VP.Models.Robot;
using TouchSocket.Core;
using TouchSocket.Sockets;

namespace TeamAAS_VP.Core.Lights
{
    public class TcpProtocol : ICommunicationProtocol
    {
        private readonly string _host;
        private readonly int _port;
        private TcpClient _client;

        public bool IsConnected => _client?.Online == true;
        public IWaitingClient<ITcpClient, IReceiverResult> _waitClient { get; private set; }
        public Terminator Terminator { get; set; } = Terminator.None;
        public Encoding Encoding { get; set; } = Encoding.ASCII;

        public event Action<object, bool> ConnectionChanged;
        public event Action<object, string> DataReceived;
        public event Action<object, string> DataSent;

        public TcpProtocol(string host, int port, Terminator terminator = Terminator.None)
        {
            _host = host;
            _port = port;
            Terminator = terminator;
        }

        public async Task<bool> ConnectAsync()
        {
            try
            {
                _client = new TouchSocket.Sockets.TcpClient();
                var config = new TouchSocketConfig();
                config.SetRemoteIPHost(new IPHost(IPAddress.Parse(_host), _port));
                config.ConfigurePlugins(a => { a.UseTcpReconnection(); });       ////如需永远尝试连接，tryCount设置为-1即可。
                                                                                 ////设置结束符
                if (Terminator == Terminator.None)
                {
                    config.SetTcpDataHandlingAdapter(() => { return new NormalDataHandlingAdapter(); });       ////亦或者省略\r\n，但此时调用方不能高速调用，会粘包
                }
                else if (Terminator == Terminator.CR)
                {
                    config.SetTcpDataHandlingAdapter(() => { return new TerminatorPackageAdapter("\r"); });       //命令行中使用\r结尾 
                }
                else if (Terminator == Terminator.LF)
                {
                    config.SetTcpDataHandlingAdapter(() => { return new TerminatorPackageAdapter("\n"); });       //命令行中使用\n结尾 
                }
                else if (Terminator == Terminator.CRLF)
                {
                    config.SetTcpDataHandlingAdapter(() => { return new TerminatorPackageAdapter("\r\n"); });       //命令行中使用\r\n结尾 
                }
                //载入配置
                _client.Setup(config);
                ////调用CreateWaitingClient获取到IWaitingClient的对象。
                _waitClient = _client.CreateWaitingClient(new WaitingOptions()
                {
                    FilterFunc = response => //设置用于筛选的fun委托，当返回为true时，才会响应返回
                    {
                        return true;

                        //if (response.Data.Length == 1)
                        //{
                        //    return true;
                        //}
                        //return false;
                    }
                });
                var result = await _client.TryConnectAsync();
                if (result.IsSuccess)
                {
                    ConnectionChanged?.Invoke(this, true);
                    return true;
                }
                ConnectionChanged?.Invoke(this, false);
                return false;
            }
            catch
            {
                return false;
            }
        }

        public Task DisconnectAsync()
        {
            ConnectionChanged?.Invoke(this, false);
            _client?.Close();
            return Task.CompletedTask;
        }

        public async Task<byte[]> SendAndReceiveAsync(byte[] data, int timeout = 5000)
        {
            if (_waitClient == null)
                throw new InvalidOperationException("Not connected");

            DataSent?.Invoke(this, Encoding.GetString(data));
            var response = await _waitClient.SendThenReturnAsync(data, timeout);
            DataReceived?.Invoke(this, Encoding.GetString(response));
            return response;
        }

        public Task SendAsync(byte[] data)
        {
            if (_client == null)
                throw new InvalidOperationException("Not connected");

            DataSent?.Invoke(this, Encoding.GetString(data));
            _client.Send(data);
            return Task.CompletedTask;
        }

        public async Task<string> SendAndReceiveAsync(string data, int timeout = 5000)
        {

            if (_waitClient == null)
                throw new InvalidOperationException("Not connected");

            DataSent?.Invoke(this, data);
            var response = await SendAndReceiveAsync(Encoding.GetBytes(data), timeout);
            DataReceived?.Invoke(this, Encoding.GetString(response));
            return Encoding.GetString(response);
        }

        public string SendAndReceive(string data, int timeout = 5000)
        {
            if (_waitClient == null)
                throw new InvalidOperationException("Not connected");

            DataSent?.Invoke(this, data);
            var response = _waitClient.SendThenReturn(Encoding.GetBytes(data), timeout);
            DataReceived?.Invoke(this, Encoding.GetString(response));
            return Encoding.GetString(response);
        }

        public byte[] SendAndReceive(byte[] data, int timeout = 5000)
        {
            if (_waitClient == null)
                throw new InvalidOperationException("Not connected");

            DataSent?.Invoke(this, Encoding.GetString(data));
            var response = _waitClient.SendThenReturn(data, timeout);
            DataReceived?.Invoke(this, Encoding.GetString(response));
            return response;
        }

        public void Send(string data)
        {
            if (_client == null)
                throw new InvalidOperationException("Not connected");

            DataSent?.Invoke(this, data);
            _client.Send(Encoding.GetBytes(data));
        }

        public async Task SendAsync(string data)
        {
            if (_client == null)
                throw new InvalidOperationException("Not connected");

            DataSent?.Invoke(this, data);
            await _client.SendAsync(Encoding.GetBytes(data));
        }

        public void Send(byte[] data)
        {
            if (_client == null)
                throw new InvalidOperationException("Not connected");

            DataSent?.Invoke(this, Encoding.GetString(data));
            _client.Send(data);
        }

        public void Dispose()
        {
            _client?.Dispose();
        }
    }
}