//
// Created by lukas on 05.02.22.
//

#ifndef OPENGLTEST_RENDERBASE_H
#define OPENGLTEST_RENDERBASE_H


#include "../gl/Renderer.h"
#include "../gl/Shader.h"

template <class T>
class RenderBase {
public:
    virtual VertexArray* setVertexArray() = 0;
    virtual Shader setShader() = 0;
    virtual IndexBuffer* setIndexBuffer() = 0;

    static RenderBase* getInstance() {
        if (instance == nullptr) {
            instance = new T();
            instance->init();
        }
        return instance;

    }

private:
    static RenderBase* instance;


private:
    Renderer r;
    VertexArray* va;
    IndexBuffer* ib;
    Shader s;

public:
    RenderBase(){};
    void render(){
        r.render(*va, *ib, s);
    }
    void init() {
        s = setShader();
        va = setVertexArray();
        ib = setIndexBuffer();
    }
    void deinit(){}

    unsigned getMVPhandle(){
        return s.getUniformHandle("MVP");
    }
    unsigned getUniformhandle(std::string name){
        return s.getUniformHandle(std::move(name));
    }
};

template<class T>
RenderBase<T> *RenderBase<T>::instance = nullptr;

#endif //OPENGLTEST_RENDERBASE_H