//
// Created by lukas on 03.02.22.
//

#ifndef OPENGLTEST_SHADER_H
#define OPENGLTEST_SHADER_H

#include <unordered_map>
#include <string>

class Shader {
private:
    unsigned mProgHandle;

    std::unordered_map<std::string, unsigned> uniformhandles;
public:
    /**
 * load the compiled shader pipeline
 * @param vertex_file_path path to vertex source file
 * @param fragment_file_path path to fragment source file
 * @return program id
 */
    unsigned int loadShaderFromFile(const std::string vertex_file_path, const std::string geometry_file_path, const std::string fragment_file_path);

    unsigned int loadShader(const std::string vertex_src, const std::string geometry_src, const std::string fragment_src);



    std::string readFile(std::string path);

    void Bind() const;

    unsigned getHandle() const;

    unsigned getUniformHandle(std::string name);

private:
    /**
 * comile a specific shader source
 * @param source source string
 * @param type shader tpye
 * @return id of copiled shader
 */
    unsigned int compileShader(const char *source, unsigned int type) const;

};

#endif //OPENGLTEST_SHADER_H