using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Client
{
	class Client
	{
		private readonly int BUFF_SIZE = 1024;
		private string IP { get; set; } = "127.0.0.1";
		private int Port { get; set; } = 7000;

		public Client(string ip = "127.0.0.1", int port = 7000)
		{
			this.IP = ip;
			this.Port = port;
		}

		public byte Connect()
		{
			TcpClient client = new TcpClient(this.IP, this.Port);

			Bitmap bmp = CaptureScreen();
			ImageConverter imgConverter = new ImageConverter();
			byte[] imgBytes = (byte[])imgConverter.ConvertTo(bmp, typeof(byte[]));
			byte[] nBytes = BitConverter.GetBytes(imgBytes.Length);

			byte[] result = new byte[1];
			using (NetworkStream stream = client.GetStream())
			{
				// Send data size
				stream.Write(nBytes, 0, nBytes.Length);

				// Send image
				int end = imgBytes.Length;
				int start = 0;
				while (start < end)
				{
					int size = end - start >= BUFF_SIZE ? BUFF_SIZE : end - start;
					stream.Write(imgBytes, start, size);

					start += size;
				}

				// Receive result
				result = new byte[1];
				stream.Read(result, 0, result.Length);

				Console.WriteLine(result[0]);

			}

			client.Close();

			return result[0];
		}

		private Bitmap CaptureScreen()
		{
			Rectangle rect = Screen.PrimaryScreen.Bounds;
			Bitmap img = new Bitmap(rect.Width, rect.Height);

			using (Graphics g = Graphics.FromImage(img))
			{
				g.CopyFromScreen(rect.X, rect.Y, 0, 0, img.Size, CopyPixelOperation.SourceCopy);
			}

			return img;
		}

	}
}