using LearnOpenTK.Common;
using OpenTK.Graphics.OpenGL4;
using OpenTK.Mathematics;

namespace TheLabs;

public class RenderObject
{
    public Mesh Mesh;
    public Shader Shader;
    public Texture Texture; 
    
    public Vector3 Position = Vector3.Zero;
    public Matrix4 Transform = Matrix4.Identity;
    public Quaternion Rotation = Quaternion.Identity;
    public Vector3 Scale = Vector3.One;

    public RenderObject(Mesh mesh, Shader shader, Texture texture)
    {
        Mesh = mesh;
        Shader = shader;
        Texture = texture;
    }
    
    public void Draw(Matrix4 view, Matrix4 projection)
    {
        // 1. Activate Shader
        Shader.Use();
        Shader.SetInt("uTexture", 0);
        // 2. Bind Texture
        Texture.Use();
        // 3. Calculate Model Matrix
        Matrix4 model = Matrix4.CreateScale(Scale) * Matrix4.CreateFromQuaternion(Rotation) * Matrix4.CreateTranslation(Position);        
        int modelLoc = GL.GetUniformLocation(Shader.Handle, "model");
        GL.UniformMatrix4(modelLoc, false, ref model); // Try TRUE here

        int viewLoc = GL.GetUniformLocation(Shader.Handle, "view");
        GL.UniformMatrix4(viewLoc, false, ref view); // Try TRUE here

        int projLoc = GL.GetUniformLocation(Shader.Handle, "projection");
        GL.UniformMatrix4(projLoc, false, ref projection); // Try TRUE here
        
        // 5. Tell the Mesh to draw itself
        Mesh.Draw();
    }
}