using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    using System.Security.Cryptography;
    using System.Drawing.Imaging;

    namespace G {
        public partial class Controller : Form {
            public Controller() {
                InitializeComponent();
            }

            private MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
            private ImageConverter c = new ImageConverter();
            private FrameX f = null;
            private void Controller_Load(object sender, EventArgs e) {
                f = new FrameX(this);
                f.Visible = true;
            }

            private void setCam(object sender, EventArgs e) {
                f.r = new Rectangle( //
                    Int32.Parse(this.Kt.Text), Int32.Parse(this.Kl.Text), //
                    Int32.Parse(this.Kx.Text), Int32.Parse(this.Ky.Text));
                f.Refresh();
            }

            public class FrameX : Form {
                private Form parent = null;
                public FrameX(Form parent) {
                    this.parent = parent;
                    this.SuspendLayout();
                    this.FormBorderStyle = FormBorderStyle.None;
                    this.TransparencyKey = System.Drawing.SystemColors.Control;
                    this.WindowState = System.Windows.Forms.FormWindowState.Maximized;
                    this.Paint += new System.Windows.Forms.PaintEventHandler(this.Frame_Paint);
                    this.MouseClick += new System.Windows.Forms.MouseEventHandler(this.Frame_MouseClick);
                    this.Enabled = false;
                    this.ResumeLayout(false);
                }

                private void Frame_MouseClick(object sender, MouseEventArgs e) {
                    this.parent.Focus();
                }

                public Rectangle r = new Rectangle(151, 181, 640, 360);
                private const int w = 3;
                private void Frame_Paint(object sender, PaintEventArgs e) {
                    using (Graphics g = e.Graphics)
                    using (Pen p = new Pen(Color.Black, w))
                    using (Brush b = new SolidBrush(SystemColors.Control))
                    {
                        g.Clear(SystemColors.GrayText);
                        g.DrawRectangle(p, r.X - w + 1, r.Y - w + 1, r.Width + w, r.Height + w);
                        g.FillRectangle(b, r);
                    }
                }
            }

            private void isCamVisible_CheckedChanged(object sender, EventArgs e) {
                this.Deactivate -= new System.EventHandler(this.Controller_Deactivate);
                f.Visible = this.isCamVisible.Checked;
                this.Deactivate += new System.EventHandler(this.Controller_Deactivate);
                this.Focus();
            }

            private void Controller_Deactivate(object sender, EventArgs e) {
                this.isCamVisible.Checked=false;
            }

            private void doValidating(object sender, CancelEventArgs e) {
                TextBox p = (TextBox)sender;
                int nr = Int32.Parse(p.Text);
                errorProvider1.SetError(p, (nr < 0 || nr > 1000 ? "Off bounds." : ""));
            }

            private Bitmap getContentBitmap() {
                Rectangle r = f.r;
                Bitmap hc = new Bitmap(r.Width, r.Height);
                using (Graphics gf = Graphics.FromImage(hc)) {
                    gf.CopyFromScreen(r.Left, r.Top, 0, 0, //
                        new Size(r.Width, r.Height), CopyPixelOperation.SourceCopy);
                }
                return hc;
            }

            private byte[] getBitmapHash(Bitmap hc) {
                return md5.ComputeHash(c.ConvertTo(hc, typeof(byte[])) as byte[]);
            }

            public static Bitmap getGrayscale(Bitmap hc){
                Bitmap result = new Bitmap(hc.Width, hc.Height);
                ColorMatrix colorMatrix = new ColorMatrix(new float[][]{   
                    new float[]{0.5f,0.5f,0.5f,0,0}, new float[]{0.5f,0.5f,0.5f,0,0},
                    new float[]{0.5f,0.5f,0.5f,0,0}, new float[]{0,0,0,1,0,0},
                    new float[]{0,0,0,0,1,0}, new float[]{0,0,0,0,0,1}});

                using (Graphics g = Graphics.FromImage(result)) {
                    ImageAttributes attributes = new ImageAttributes();
                    attributes.SetColorMatrix(colorMatrix);
                    g.DrawImage(hc, new Rectangle(0, 0, hc.Width, hc.Height),
                       0, 0, hc.Width, hc.Height, GraphicsUnit.Pixel, attributes);
                }
                return result;
            }

            private void getHash_Click(object sender, EventArgs e) {
                DateTime a = DateTime.Now;
                Bitmap b = getContentBitmap();
                String o = String.Join(",", getBitmapHash(b));
                //getGrayscale(b).Save(@"C:\Users\Margus Martsepp\Desktop\out.png", ImageFormat.Png);
                DateTime l = DateTime.Now;

                Console.WriteLine(String.Format("Hash is: {0} [{1}ms]", o, (int)(l - a).TotalMilliseconds));
            }
        }
    }