#pragma once

#include <map>
#include <string>

#include <glad/glad.h>

#include "Shader.h"
#include "LevelMap.h"

class ResourceManager
{
public:
    // resource storage
    static std::map<std::string, Shader>    shaders;
    static std::map<std::string, LevelMap> levelMaps;
    // loads (and generates) a shader program from file loading vertex, fragment (and geometry) shader's source code. If gShaderFile is not nullptr, it also loads a geometry shader
    static Shader LoadShader(const char* vShaderFile, const char* fShaderFile, const char* gShaderFile, std::string name);
    // retrieves a stored sader
    static Shader GetShader(std::string name);
    // properly de-allocates all loaded resources
    static void Clear();

    static LevelMap LoadLevelMap(const char* filePath, std::string name);
private:
    // private constructor, that is we do not want any actual resource manager objects. Its members and functions should be publicly available (static).
    ResourceManager() { }
    // loads and generates a shader from file
    static Shader LoadShaderFromFile(const char* vShaderFile, const char* fShaderFile, const char* gShaderFile = nullptr);

    static LevelMap LoadLevelMapFromFile(const char* filePath);
};