using System;
using System.Threading;
using System.Threading.Tasks;
using UnityEngine;
using Cysharp.Threading.Tasks;
namespace BITKit.Net.Kcp
{
	public class MonoKcpClient : MonoBehaviour,INetClient,INetProvider
	{
		internal static MonoKcpClient Singleton { get; private set; }
		
		[SerializeField] private string m_host;
		[SerializeField] private ushort m_port;
		[SerializeField] private bool connectOnStart;
		[SerializeField] private bool autoReconnect;
		#if UNITY_EDITOR
		[SerializeField] private Optional<string> allowDebugHost;
		[SerializeField] private Optional<ushort> allowDebugPort;
		#endif
		
		private KcpNetClient client;
		private INetClient _netClientImplementation=>client;
		private INetProvider _netProviderImplementation=>client;

		private CancellationTokenSource _cancellationTokenSource;

		public event Action OnStartConnect
		{
			add => _netClientImplementation.OnStartConnect += value;
			remove => _netClientImplementation.OnStartConnect -= value;
		}

		public event Action OnConnected
		{
			add => _netClientImplementation.OnConnected += value;
			remove => _netClientImplementation.OnConnected -= value;
		}

		public event Action OnDisconnected
		{
			add => _netClientImplementation.OnDisconnected += value;
			remove => _netClientImplementation.OnDisconnected -= value;
		}

		public event Action OnConnectedFailed
		{
			add => _netClientImplementation.OnConnectedFailed += value;
			remove => _netClientImplementation.OnConnectedFailed -= value;
		}

		public bool IsConnected => _netClientImplementation.IsConnected;

		public int Ping => _netClientImplementation.Ping;

		public int Id => _netClientImplementation.Id;

		public void Disconnect()
		{
			_netClientImplementation.Disconnect();
		}

		public UniTask<bool> Connect(string address = "localhost", ushort port = 27014)
		{
			return _netClientImplementation.Connect(address, port);
		}

		public void SendServerMessage(string message)
		{
			_netClientImplementation.SendServerMessage(message);
		}

		public void ServerCommand<T>(T command = default)
		{
			_netProviderImplementation.ServerCommand(command);
		}

		public void AllClientCommand<T>(T command = default)
		{
			_netProviderImplementation.AllClientCommand(command);
		}

		public void ClientCommand<T>(int id, T command)
		{
			_netProviderImplementation.ClientCommand(id, command);
		}

		public UniTask<T> GetFromServer<T>(string addressablePath = Constant.System.Internal)
		{
			return _netProviderImplementation.GetFromServer<T>(addressablePath);
		}

		public UniTask<T> GetFromClient<T>(int id, string addressablePath = Constant.System.Internal)
		{
			return _netProviderImplementation.GetFromClient<T>(id, addressablePath);
		}

		public void AddRpcHandle(object rpcHandle)
		{
			_netProviderImplementation.AddRpcHandle(rpcHandle);
		}

		public void AddCommandListener<T>(Action<T> handle)
		{
			_netProviderImplementation.AddCommandListener(handle);
		}

		public void RemoveCommandListener<T>(Action<T> handle)
		{
			_netProviderImplementation.RemoveCommandListener(handle);
		}

		public void SendRT(string rpcName, params object[] pars)
		{
			_netProviderImplementation.SendRT(rpcName, pars);
		}

		public void SendTargetRT(int id, string rpcName, params object[] pars)
		{
			_netProviderImplementation.SendTargetRT(id, rpcName, pars);
		}

		public void SendAllRT(string rpcName, params object[] pars)
		{
			_netProviderImplementation.SendAllRT(rpcName, pars);
		}

		public void Tick()
		{
			_netProviderImplementation.Tick();
		}

		public void HandShake()
		{
			_netProviderImplementation.HandShake();
		}

		private void Awake()
		{
			Singleton = this;
			_cancellationTokenSource = new CancellationTokenSource();
			client = new KcpNetClient();
			client.OnConnectedFailed += Reconnect;
			client.OnDisconnected += Reconnect;
		}

		private async void Reconnect()
		{
			if (autoReconnect is false) return;
			try
			{
				await Task.Delay(1000, _cancellationTokenSource.Token);
				if (client.IsConnected is false)
				{
					await client.Connect(m_host, m_port);
				}
			}
			catch (OperationCanceledException)
			{
				
			}
		}

		private void Start()
		{
			if (!connectOnStart) return;
			#if UNITY_EDITOR
			var _host = allowDebugHost.Allow ? allowDebugHost.Value : m_host;
			var _port = allowDebugPort.Allow ? allowDebugPort.Value : m_port;
			Connect(_host, _port).Forget();
			#else
			Connect(m_host, m_port).Forget();
			#endif
		}

		private void OnDestroy()
		{
			_cancellationTokenSource.Cancel();
			if (client.IsConnected)
			{
				client.Disconnect();
			}
		}
	}
}