// Copyright [2023] Krzysztof Rudnicki
#ifndef BREAKOUT_SHADER_HPP_
#define BREAKOUT_SHADER_HPP_

#include <string>

#include "../dependencies/include/glad/glad.h"
#include "../dependencies/include/glm/glm/glm.hpp"
#include "../dependencies/include/glm/glm/gtc/type_ptr.hpp"


// General purpose shader object. Compiles from file, generates
// compile/link-time error messages and hosts several utility
// functions for easy management.
class Shader {
 public:
    // state
    unsigned int ID;
    // constructor
    Shader() { }
    // sets the current shader as active
    Shader  &Use();
    // compiles the shader from given source code
    void    Compile(
        const char *vertexSource,
        const char *fragmentSource,
        const char *geometrySource = nullptr);
    // note: geometrysource code is optional
    // utility functions
    void    SetFloat(
        const char *name,
        float value,
        bool useShader = false);
    void    SetInteger(const char *name,
    int value,
    bool useShader = false);
    void    SetVector2f(const char *name,
    float x, float y, bool useShader = false);
    void    SetVector2f(
        const char *name, const glm::vec2 &value, bool useShader = false);
    void    SetVector3f(
        const char *name, float x, float y, float z, bool useShader = false);
    void    SetVector3f(
        const char *name, const glm::vec3 &value, bool useShader = false);
    void    SetVector4f(
        const char *name,
        float x, float y, float z, float w,
        bool useShader = false);
    void    SetVector4f(
        const char *name, const glm::vec4 &value, bool useShader = false);
    void    SetMatrix4(
        const char *name, const glm::mat4 &matrix, bool useShader = false);

 private:
    // checks if compilation or linking failed and if so, print the error logs
    void    checkCompileErrors(unsigned int object, std::string type);
};

#endif  // BREAKOUT_SHADER_HPP_