//
// Created by jie on 2023/10/11.
//

#ifndef LEARNOPENGL_SHADERHELPER_H
#define LEARNOPENGL_SHADERHELPER_H

#include "glad/glad.h"
#include <filesystem>
#include <type_traits>

class ShaderService {
private:
    unsigned int programId;
public:
    ShaderService(const std::filesystem::path &vertexShaderPath, const std::filesystem::path &fragShaderPath);
    bool CheckShader(unsigned int shaderIndex, bool isProgram = false);
    void Use();

    template<typename T>
    requires std::is_same_v<T, bool> || std::is_same_v<T, int> || std::is_same_v<T, float>
    void SetUniform(std::string_view name, T value);
};

template<typename T>
requires std::is_same_v<T, bool> || std::is_same_v<T, int> || std::is_same_v<T, float>
void ShaderService::SetUniform(std::string_view name, T value) {
    if constexpr (std::is_same_v<T, bool>) {
        glUniform1i(glGetUniformLocation(programId, name.data()), (int) value);
    } else if constexpr (std::is_same_v<T, int>) {
        glUniform1i(glGetUniformLocation(programId, name.data()), value);
    } else if constexpr (std::is_same_v<T, float>) {
        glUniform1f(glGetUniformLocation(programId, name.data()), value);
    }
}


#endif //LEARNOPENGL_SHADERHELPER_H