#pragma once
#include <GL/glew.h>

#include "defines.hpp"

struct IndexBuffer {
    IndexBuffer(void* data, uint32 numIndices, uint8 elementSize) {
        glGenBuffers(1, &bufferId);
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufferId);
        glBufferData(GL_ELEMENT_ARRAY_BUFFER, numIndices*elementSize, data, GL_STATIC_DRAW);

        // POSITION
        glEnableVertexAttribArray(0);
        glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*) offsetof(Vertex,x));
        // COLOR
        glEnableVertexAttribArray(1);
        glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*) offsetof(Vertex,r));

        glBindVertexArray(0);
    };
    virtual ~IndexBuffer() {
        glDeleteBuffers(1, &bufferId);
    }

    void bind() {
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufferId);
    }
    void unbind() {
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
    }

private:
    GLuint bufferId;
};