using SharpGL;
using System.Drawing;
using System.IO;
using System.Windows;
using System.Windows.Media.Imaging;
using System.Drawing.Imaging;
 
using Rectangle = System.Drawing.Rectangle;

using Image = System.Windows.Controls.Image;

namespace TEST_SHARPGL_TEXTURE
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private float rotationAngle = 0.0f;
        private Bitmap DefaultImage;
        private uint textureId;
        private OpenGL gl;
        public MainWindow()
        {
            InitializeComponent();
          
        }
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            gl = Scene_Viewport.OpenGL; ;
            DefaultImage = getImage();
            if (DefaultImage == null) { Environment.Exit(0); }
            //  BitmapSaver.SaveBitmap(DefaultImage, @"C:\P__\image.jpg");

            // display d = new display(DefaultImage); d.ShowDialog();
            textureId = LoadTexture(Scene_Viewport.OpenGL, DefaultImage);
           // MessageBox.Show(textureId.ToString());
         
        }


        private void DrawScene(object sender, SharpGL.WPF.OpenGLRoutedEventArgs args)
        {
            

            // Clear the color and depth buffer.
            gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
             // Load the identity matrix.
            gl.LoadIdentity();
          

            //   gl.Enable(OpenGL.GL_BLEND);
            // gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
            //   gl.Disable(OpenGL.GL_LIGHTING);

            // Move the cube slightly back so it’s visible.
            gl.Translate(0.0f, 0.0f, -6.0f);


            // Rotate the cube.
            gl.Rotate(rotationAngle, 1.0f, 1.0f, 0.0f);

            // Bind the texture.
          

            // Draw a textured cube.
            DrawCube(gl);

            gl.End();

            // Flush OpenGL commands.
             gl.Flush();

            // Update rotation angle.
            rotationAngle += 1.0f;
            if (rotationAngle >= 360.0f)
                rotationAngle -= 360.0f;
        }
        private void DrawCube(OpenGL gl)
        {
            gl.Begin(OpenGL.GL_QUADS);
            gl.Enable(OpenGL.GL_TEXTURE_2D);
            
            gl.BindTexture(OpenGL.GL_TEXTURE_2D, textureId);
            // Front face
            gl.TexCoord(0.0f, 0.0f); gl.Vertex(-1.0f, -1.0f, 1.0f);
            gl.TexCoord(1.0f, 0.0f); gl.Vertex(1.0f, -1.0f, 1.0f);
            gl.TexCoord(1.0f, 1.0f); gl.Vertex(1.0f, 1.0f, 1.0f);
            gl.TexCoord(0.0f, 1.0f); gl.Vertex(-1.0f, 1.0f, 1.0f);

            // Back face
            gl.TexCoord(0.0f, 0.0f); gl.Vertex(-1.0f, -1.0f, -1.0f);
            gl.TexCoord(1.0f, 0.0f); gl.Vertex(1.0f, -1.0f, -1.0f);
            gl.TexCoord(1.0f, 1.0f); gl.Vertex(1.0f, 1.0f, -1.0f);
            gl.TexCoord(0.0f, 1.0f); gl.Vertex(-1.0f, 1.0f, -1.0f);


            // Left face
            gl.TexCoord(0.0f, 0.0f); gl.Vertex(-1.0f, -1.0f, -1.0f);
            gl.TexCoord(1.0f, 0.0f); gl.Vertex(-1.0f, -1.0f, 1.0f);
            gl.TexCoord(1.0f, 1.0f); gl.Vertex(-1.0f, 1.0f, 1.0f);
            gl.TexCoord(0.0f, 1.0f); gl.Vertex(-1.0f, 1.0f, -1.0f);

            // Right face
            gl.TexCoord(0.0f, 0.0f); gl.Vertex(1.0f, -1.0f, -1.0f);
            gl.TexCoord(1.0f, 0.0f); gl.Vertex(1.0f, -1.0f, 1.0f);
            gl.TexCoord(1.0f, 1.0f); gl.Vertex(1.0f, 1.0f, 1.0f);
            gl.TexCoord(0.0f, 1.0f); gl.Vertex(1.0f, 1.0f, -1.0f);

            // Top face
            gl.TexCoord(0.0f, 0.0f); gl.Vertex(-1.0f, 1.0f, -1.0f);
            gl.TexCoord(1.0f, 0.0f); gl.Vertex(-1.0f, 1.0f, 1.0f);
            gl.TexCoord(1.0f, 1.0f); gl.Vertex(1.0f, 1.0f, 1.0f);
            gl.TexCoord(0.0f, 1.0f); gl.Vertex(1.0f, 1.0f, -1.0f);

            // Bottom face
            gl.TexCoord(0.0f, 0.0f); gl.Vertex(-1.0f, -1.0f, -1.0f);
            gl.TexCoord(1.0f, 0.0f); gl.Vertex(1.0f, -1.0f, -1.0f);
            gl.TexCoord(1.0f, 1.0f); gl.Vertex(1.0f, -1.0f, 1.0f);
            gl.TexCoord(0.0f, 1.0f); gl.Vertex(-1.0f, -1.0f, 1.0f);
            gl.End();
        }
        private uint LoadTexture(OpenGL gl, Bitmap bitmap)
        {
            if (bitmap == null)
                throw new ArgumentNullException(nameof(bitmap), "Bitmap cannot be null.");

            // Generate a texture ID.
            uint[] textureIds = new uint[1];
            gl.GenTextures(1, textureIds);
            var error = gl.GetError();
            if (error != OpenGL.GL_NO_ERROR)
            {
                MessageBox.Show($"OpenGL Error: {error}");
            }
            uint id = textureIds[0];
            

            // Set texture parameters.
            gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_S, OpenGL.GL_REPEAT);
            gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_T, OpenGL.GL_REPEAT);
            gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MIN_FILTER, OpenGL.GL_LINEAR);
            gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MAG_FILTER, OpenGL.GL_LINEAR);

            // Bind the texture to apply settings.
            gl.BindTexture(OpenGL.GL_TEXTURE_2D, id);
            // Lock the bitmap bits for OpenGL.
            BitmapData data = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height),
                                              ImageLockMode.ReadOnly,
                                              System.Drawing.Imaging.PixelFormat.Format32bppArgb);

            // Create the texture from the bitmap data.
            gl.TexImage2D(OpenGL.GL_TEXTURE_2D, 0, (int)OpenGL.GL_RGBA, data.Width, data.Height, 0,
                          OpenGL.GL_BGRA, OpenGL.GL_UNSIGNED_BYTE, data.Scan0);

            // Unlock the bitmap bits.
            bitmap.UnlockBits(data);
             
            return id;
        }
        private Bitmap getImage()
        {
            string path = @"C:\Users\stan0033_laptop\source\repos\TEST_SHARPGL_TEXTURE\TEST_SHARPGL_TEXTURE\bin\Debug\net6.0-windows\test\box.jpg";
         //   MessageBox.Show(File.Exists(path).ToString());
            return LoadImage(path);
        }
        public Bitmap LoadImage(string imagePath)
        {
            try
            {
                // Load the image from the file path and return it as a Bitmap
                Bitmap bitmap = new Bitmap(imagePath);
                return bitmap;
            }
            catch (Exception ex)
            {
                // Handle any errors that occur during the image loading process
                MessageBox.Show($"Error loading image: {ex.Message}");
                return null;
            }
        }

      
    }
    public class BitmapSaver
    {
        public static void SaveBitmap(Bitmap bitmap, string targetSavePath)
        {
            if (bitmap == null)
            {
                throw new ArgumentNullException(nameof(bitmap), "Bitmap cannot be null.");
            }

            if (string.IsNullOrWhiteSpace(targetSavePath))
            {
                throw new ArgumentException("Target save path cannot be null or empty.", nameof(targetSavePath));
            }

            try
            {
                // Ensure the directory exists
                string directory = Path.GetDirectoryName(targetSavePath);
                if (!string.IsNullOrEmpty(directory) && !Directory.Exists(directory))
                {
                    Directory.CreateDirectory(directory);
                }

                // Determine the image format based on the file extension
                ImageFormat format;
                string extension = Path.GetExtension(targetSavePath)?.ToLowerInvariant();
                switch (extension)
                {
                    case ".png":
                        format = ImageFormat.Png;
                        break;
                    case ".jpg":
                    case ".jpeg":
                        format = ImageFormat.Jpeg;
                        break;
                    case ".bmp":
                        format = ImageFormat.Bmp;
                        break;
                    case ".gif":
                        format = ImageFormat.Gif;
                        break;
                    case ".tiff":
                        format = ImageFormat.Tiff;
                        break;
                    default:
                        throw new NotSupportedException($"File extension '{extension}' is not supported.");
                }

                // Save the bitmap to the specified path
                bitmap.Save(targetSavePath, format);
            }
            catch (Exception ex)
            {
                throw new InvalidOperationException($"Failed to save the bitmap to '{targetSavePath}'", ex);
            }
        }
    }

}