using System;
using System.Net.Sockets;
using System.Threading.Tasks;
using UnityEngine;
using Utils;

namespace Network
{
    public class UnityTcpClient : Singleton<UnityTcpClient>, IDisposable
    {
        private const int TcpMaxPayloadSize = 1460;

        private TcpClient _client;
        private bool _disposed;

        public UnityTcpClient()
        {
            try
            {
                _client = new TcpClient();
                _client.Connect("127.0.0.1", 12345);
                Application.quitting += Dispose;
            }
            catch (Exception ex)
            {
                Debug.LogException(ex);
                return;
            }
        }

        public async Task<byte[]> SendAndReceiveData(byte[] data)
        {
            try
            {
                await using var stream = _client.GetStream();

                await stream.WriteAsync(data, 0, data.Length);

                var buffer = new byte[TcpMaxPayloadSize];
                var len = await stream.ReadAsync(buffer);
                return buffer[..len];
            }
            catch (Exception ex)
            {
                Debug.LogException(ex);
                return new byte[0];
            }
        }

        public void Dispose()
        {
            if (_disposed) return;

            try
            {
                _client.Close();
                _client.Dispose();
            }
            catch (Exception ex)
            {
                Debug.LogException(ex);
                return;
            }
            finally
            {
                _client = null;
            }

            _disposed = true;
        }
    }
}