#ifndef _H_QUAD_H
#define _H_QUAD_H

#include <thirdparty/glad/glad.h>
#include <cstring>

class Quad
{
public:
    void draw();
    ~Quad();
protected:
    Quad(const float* vertexData);
private:
	unsigned indices[6] = {
		0, 1, 2,
		3, 2, 0
	};

	// Vertex Array, Vertex Buffer, Element Buffer
	unsigned VAO, VBO, EBO;

    float vertices[20];
};

class UnitQuad : public Quad
{
public:
    UnitQuad() : Quad(vertices) {}
private:
	// simple rectangle. Most scales will be done based on this generic vertex data. 
	static constexpr float vertices[20] = {
		// vertex		  texturecoords
		-0.5f, -0.5f, 0.0f, 0.0f, 0.0f, // bottom left
		 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, // bottom right
		 0.5f,  0.5f, 0.0f, 1.0f, 1.0f, // top right
		-0.5f,  0.5f, 0.0f, 0.0f, 1.0f  // top left
	};
};

class ScreenQuad : public Quad
{
public:
    ScreenQuad() : Quad(vertices) {}
private:
	// simple rectangle. Most scales will be done based on this generic vertex data. 
	static constexpr float vertices[20] = {
		// vertex		  texturecoords
		-1.0f, -1.0f, 0.0f, 0.0f, 0.0f, // bottom left
		 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, // bottom right
		 1.0f,  1.0f, 0.0f, 1.0f, 1.0f, // top right
		-1.0f,  1.0f, 0.0f, 0.0f, 1.0f  // top left
	};
};

#endif // _H_QUAD_H