/*
 * 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;
	unsigned int m_Size;
	unsigned int m_Offset;
};

class VertexBuffer {
private:
	unsigned int m_ID, m_DataStride;
	std::vector<VertexAttribPointer> m_VertexAttribs;
public:
	REMOVE_COPY(VertexBuffer);

	VertexBuffer(VertexBuffer&& 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;
	}

	VertexBuffer(const std::vector<float>& data, unsigned int stride);
	~VertexBuffer();

	void Bind() const;
	void Unbind() const;
	void AddVertexAttribPointer(unsigned int index, unsigned int coordinateSize, unsigned int offset);
	void BindVertexAttribs() const;
};

class VertexArray {
private:
	unsigned int m_ID, m_VertexCount;
	std::vector<VertexBuffer> m_VertexBuffers; //use to destroy vbos when become unused
public:
	REMOVE_COPY(VertexArray);

	VertexArray(VertexArray&& other) {
		m_ID = other.m_ID;
		m_VertexCount = other.m_VertexCount;
		m_VertexBuffers = std::move(other.m_VertexBuffers);
		other.m_VertexCount = 0;
		other.m_ID = 0;
	}

	VertexArray(unsigned int vertexCount);
	~VertexArray();

	unsigned int GetVertexCount() const { return m_VertexCount; }
	void BindVertexBuffer(VertexBuffer& vbo);
	void Bind() const;
	void Unbind() const;
};

}