#ifndef SHADER_HPP
#define SHADER_HPP

#include <glad/glad.h>

#include <string>
#include <fstream>
#include <sstream>
#include <iostream>

class Shader
{
public:
    unsigned int ID;
    // constructor generates the shader on the fly
    // ------------------------------------------------------------------------
    Shader(const std::string vertexPath, const std::string fragmentPath);
    const std::string fileToShader(const std::string shaderPath);
    // activate the shader
    // ------------------------------------------------------------------------
    void use();
    // utility uniform functions
    // ------------------------------------------------------------------------
    void setBool(const std::string &name, bool value) const;
    // ------------------------------------------------------------------------
    void setInt(const std::string &name, int value) const;
    // ------------------------------------------------------------------------
    void setFloat(const std::string &name, float value) const;

private:
    // utility function for checking shader compilation/linking errors.
    // ------------------------------------------------------------------------
    void checkCompileErrors(unsigned int shader, std::string type);
    void compileErrorsMessage(const unsigned int shader, const bool compilation, const std::string type, const std::string errorMessage);
};
#endif