/*
Crafter®.Graphics
Copyright (C) 2025 Catcrafts®
Catcrafts.net

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3.0 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
*/

module;

#include <cstdint>
#include "VulkanBuffer.h"
#include <vulkan/vulkan.h>
#include <iostream>
#include <format>

module Crafter.Graphics;
import Crafter.Math;
import Crafter.Event;
using namespace Crafter;

Camera::Camera(float fov, float aspectRatio, float near, float far) {
    projection = MatrixRowMajor<float, 4, 4, 1>::Perspective(fov, aspectRatio, near, far);
    view = MatrixRowMajor<float, 4, 4, 1>::Identity();
}

void Camera::Update() {
    projectionView = projection*view;
    onUpdate.Invoke();
}

Vector<float, 3> Camera::ToRay(uint32_t x, uint32_t y) {
 //    // Normalize the screen coordinates
 //    float mx = (2.0f * x) / sizeX - 1.0f;
 //    float my = 1.0f - (2.0f * y) / sizeY;
 //
 //    // Construct Ray in Homogeneous Clip Space
 //    Vector<float, 3> rayOrigin = Vector<float, 3>(mx, my, 0.0f);
 //    Vector<float, 3> rayEnd = Vector<float, 3>(mx, my, 1.0f);
 //
 //    // Transform Ray to View Space
 //    MatrixRowMajor<float, 4, 4, 1> invProjection = DirectX::XMMatrixInverse(NULL, projectionMatrix);
 //    Vector<float, 3> rayOriginView = DirectX::XMVector3TransformCoord(rayOrigin, invProjection);
 //    Vector<float, 3> rayEndView = DirectX::XMVector3TransformCoord(rayEnd, invProjection);
 //
 //    // Transform Ray to World Space
 //    DirectX::XMMATRIX viewMatrix = GetViewMatrix();  // Assuming this returns the view matrix
 //    DirectX::XMMATRIX invView = DirectX::XMMatrixInverse(NULL, viewMatrix);
 //    Vector<float, 3> rayOriginWorld = DirectX::XMVector3TransformCoord(rayOriginView, invView);
 //    Vector<float, 3> rayEndWorld = DirectX::XMVector3TransformCoord(rayEndView, invView);
 //
 //    // Compute Ray Direction
 //    DirectX::XMVECTOR rayDirWorld = DirectX::XMVector3Normalize(DirectX::XMVectorSubtract(rayEndWorld, rayOriginWorld));
 //
	// return rayDirWorld;
    return Vector<float, 3>(0,0,0);
}