/*
 * GLLoader.h
 *
 *  Created on: 4 nov. 2020
 *      Author: simon
 */

#pragma once

#include <vector>

#define REMOVE_COPY(className) \
	className(const className &) = delete;\
	className& operator=(const className &) = delete


namespace GL{

struct VertexAttribPointer{
	unsigned int m_Index, m_Size;
	int m_Offset;
};

class VBO{
	private:
		unsigned int m_ID, m_DataStride;
		std::vector<VertexAttribPointer> m_VertexAttribs;
	public:
		REMOVE_COPY(VBO);
		VBO(VBO&& other){
			m_VertexAttribs = std::move(other.m_VertexAttribs);
			m_ID = other.m_ID;
			m_DataStride = other.m_DataStride;
			other.m_ID = 0;
			other.m_DataStride = 0;
		}
		VBO(const std::vector<float>& data, unsigned int stride);
		~VBO();
		void bind() const;
		void unbind() const;
		void addVertexAttribPointer(unsigned int index, unsigned int coordinateSize, unsigned int offset);
		void bindVertexAttribs() const;
};

class VAO{
	private:
		unsigned int m_ID, m_VertexCount;
		std::vector<VBO> m_Vbos; //use to destroy vbos when become unused
	public:
		REMOVE_COPY(VAO);
		VAO(VAO&& other){
			m_ID = other.m_ID;
			m_VertexCount = other.m_VertexCount;
			m_Vbos = std::move(other.m_Vbos);
			other.m_VertexCount = 0;
			other.m_ID = 0;
		}
		VAO(unsigned int vertexCount);
		~VAO();
		unsigned int getVertexCount() const {return m_VertexCount;}
		void bindVBO(VBO& vbo);
		void bind() const;
		void unbind() const;
};

}