using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
using System.Threading;

namespace DWH_Arma_2_OA
{
    public partial class Form1 : Form
    {
        private static Microsoft.DirectX.Direct3D.Font font;

        private Margins marg;
        // This is used to specify the boundaries of the transparent area
        internal struct Margins
        {
            public int Left, Right, Top, Bottom;
        }

        [DllImport("user32.dll", SetLastError = true)]
        private static extern UInt32 GetWindowLong(IntPtr hWnd, int nIndex);
        [DllImport("user32.dll")]
        static extern int SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong);
        [DllImport("user32.dll")]

        static extern bool SetLayeredWindowAttributes(IntPtr hwnd, uint crKey, byte bAlpha, uint dwFlags);
        public const int GWL_EXSTYLE = -20;
        public const int WS_EX_LAYERED = 0x80000;
        public const int WS_EX_TRANSPARENT = 0x20;
        public const int LWA_ALPHA = 0x2;
        public const int LWA_COLORKEY = 0x1;

        [DllImport("dwmapi.dll")]
        static extern void DwmExtendFrameIntoClientArea(IntPtr hWnd, ref Margins pMargins);
        private Device device = null;

        public Form1()
        {
            InitializeComponent();
            // Make the window's border completely transparant
            SetWindowLong(Handle, GWL_EXSTYLE,
                    (IntPtr)(GetWindowLong(Handle, GWL_EXSTYLE) ^ WS_EX_LAYERED ^ WS_EX_TRANSPARENT));

            // Set the Alpha on the Whole Window to 255 (solid)
            SetLayeredWindowAttributes(Handle, 0, 255, LWA_ALPHA);

            // Init DirectX
            // This initializes the DirectX device. It needs to be done once.
            // The alpha channel in the backbuffer is critical.
            PresentParameters presentParameters = new PresentParameters();
            presentParameters.Windowed = true;
            presentParameters.SwapEffect = SwapEffect.Discard;
            presentParameters.BackBufferFormat = Format.A8R8G8B8;

            device = new Device(0, DeviceType.Hardware, Handle,
            CreateFlags.HardwareVertexProcessing, presentParameters);

            font = new Microsoft.DirectX.Direct3D.Font(device, new System.Drawing.Font("Corbel", 9f, FontStyle.Regular));

            Thread dx = new Thread(new ThreadStart(dxThread));
            dx.IsBackground = true;
            dx.Start();
        }

        public static void DrawShadowText(string text, Point Position, Color color)
        {
            font.DrawText(null, text, new Point(Position.X + 1, Position.Y + 1), Color.Black);
            font.DrawText(null, text, Position, color);
        }

        private void dxThread()
        {
            while (true)
            {
                // Place your update logic here
                device.Clear(ClearFlags.Target, Color.FromArgb(0, 0, 0, 0), 1.0f, 0);
                device.RenderState.ZBufferEnable = false;
                device.RenderState.Lighting = false;
                device.RenderState.CullMode = Cull.None;
                device.Transform.Projection = Matrix.OrthoOffCenterLH(0, Width, Height, 0, 0, 1);
                device.BeginScene();

                string TitleText = "DWH - Arma 2 OA Hack v1.0";
                DrawShadowText(TitleText, new Point(2, 2), Color.White);

                // Place your rendering logic here
                device.EndScene();
                device.Present();
            }
            device.Dispose(); // Unreachable code detected
            Application.Exit(); // Unreachable code detected
        }

        private void DirectXOverlayForm_Paint(object sender, PaintEventArgs e)
        {
            // Create a margin (the whole form)
            marg.Left = 0;
            marg.Top = 0;
            marg.Right = Width;
            marg.Bottom = Height;

            // Expand the Aero Glass Effect Border to the WHOLE form.
            // since we have already had the border invisible we now
            // have a completely invisible window - apart from the DirectX
            // renders NOT in black.
            DwmExtendFrameIntoClientArea(Handle, ref marg);
        }
    }
}