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using System;
using System.Drawing;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
using Core;

namespace Video
{
    public class NewVideo
    {
        private Device device;
        private PresentParameters pp;
        bool deviceLost;
        CustomVertex.TransformedTextured[] vertices;
        Texture texture;
        VertexBuffer vb;
        //DateTime time_now, time_elapsed;
       // TimeSpan time_span;
        //int pos_x, pos_y;
        uint[,] data;

        public NewVideo()
        {

        }

        public void Dispose()
        {
            if (vb != null)
            {
                vb.Dispose();
                vertices = null;
            }

            if (texture != null)
            {
                texture.Dispose();
                texture = null;
            }

            if (device != null)
            {
                device.Dispose();
                device = null;
            }
        }

        public bool Init(IntPtr hWnd)
        {
            pp = new PresentParameters();
            pp.SwapEffect = SwapEffect.Discard;
            pp.Windowed = true;
            pp.PresentFlag = PresentFlag.LockableBackBuffer;
            pp.PresentationInterval = PresentInterval.Immediate;
            pp.BackBufferCount = 1;
            pp.BackBufferHeight = 32;
            pp.BackBufferWidth = 64;
            try
            {
                device = new Device(0, DeviceType.Hardware, hWnd, CreateFlags.HardwareVertexProcessing, pp);
                device.DeviceReset += new EventHandler(OnDeviceReset);
                texture = new Texture(device, 512, 256, 0, Usage.Dynamic, Format.X8R8G8B8, Pool.Default);

                return true;
            }
            catch(DirectXException)
            {
                return false;
            }

        }

        public void AttemptRecovery()
        {
            try
            {
                if (texture != null)
                {
                    texture.Dispose();
                    texture = null;
                }

                device.TestCooperativeLevel();
            }
            catch (DeviceLostException)
            {
            }
            catch (DeviceNotResetException)
            {
                try
                {
                    device.Reset(pp);
                    deviceLost = false;
                }
                catch (DeviceLostException)
                {
                }
            }
        }
        public void OnDeviceReset(object sender, EventArgs e)
        {
            texture = new Texture(device, 512, 256, 0, Usage.Dynamic, Format.X8R8G8B8, Pool.Default);
            SetupScreen();
        }
        public void SetupScreen()
        {
            vb = new VertexBuffer(typeof(CustomVertex.TransformedTextured), 6, device, Usage.WriteOnly, CustomVertex.TransformedTextured.Format, Pool.Managed);
            vertices = new CustomVertex.TransformedTextured[6];

            vertices[0] = new CustomVertex.TransformedTextured(new Vector4(0.0f, 0.0f, 0.0f, 1.0f), 0.0f, 0.0f);
            vertices[1] = new CustomVertex.TransformedTextured(new Vector4(511.0f, 0.0f, 0.0f, 1.0f), 1.0f, 0.0f);
            vertices[2] = new CustomVertex.TransformedTextured(new Vector4(0.0f, 255.0f - 28.0f, 0.0f, 1.0f), 0.0f, 1.0f);
            vertices[3] = new CustomVertex.TransformedTextured(new Vector4(511.0f, 0.0f, 0.0f, 1.0f), 1.0f, 0.0f);
            vertices[4] = new CustomVertex.TransformedTextured(new Vector4(511.0f, 255.0f - 28.0f, 0.0f, 1.0f), 1.0f, 1.0f);
            vertices[5] = new CustomVertex.TransformedTextured(new Vector4(0.0f, 255.0f - 28.0f, 0.0f, 1.0f), 0.0f, 1.0f);

            vb.SetData(vertices, 0, LockFlags.None);
        }

        public void ClearScreen()
        {
            
            for (int i = 0; i < 64; i++)
                for (int j = 0; j < 32; j++)
                    SetPixel(i, j, (uint)Color.Black.ToArgb());
            UnlockScreen();
        }

        public void Draw()
        {
            data = (uint[,])texture.LockRectangle(typeof(uint), 0, LockFlags.None, new int[] { 512 + 32, 256 });
            SetPixel(0, 0, (uint)Color.White.ToArgb());
            SetPixel(511, 0, (uint)Color.White.ToArgb());
            SetPixel(0, 255, (uint)Color.White.ToArgb());
            SetPixel(511, 255, (uint)Color.White.ToArgb());
            texture.UnlockRectangle(0);
            Render();
        }

        public void Render()
        {
            if (deviceLost)
            {
                AttemptRecovery();
            }

            if (deviceLost)
            {
                return;
            }

            if (device != null)
            {
                device.Clear(ClearFlags.Target, Color.Black, 1.0f, 0);
                device.BeginScene();
                device.SetTexture(0, texture);
                device.VertexFormat = CustomVertex.TransformedTextured.Format;
                device.SetStreamSource(0, vb, 0);
                device.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
                device.SetTexture(0, null);
                
                device.EndScene();
                

                //test_drawing();
            }

            try
            {
                device.Present();
            }
            catch (DeviceLostException)
            {
                deviceLost = true;
            }
            catch (DeviceNotResetException)
            {
            }
            catch (Exception)
            {
            }
        }
        public void SetPixel(int x, int y, uint colour) 
        {
            data[y, x] = colour;
        }
        public uint GetPixel(int x, int y) { return data[y,x]; }
        public void LockScreen() 
        {
            data = (uint[,])texture.LockRectangle(typeof(uint), 0, LockFlags.None, new int[] { 512, 256 });
        }
        public void UnlockScreen() 
        {
            texture.UnlockRectangle(0);
        }
    }
}