SoundManager.h

#pragma once
 
#include <SDL3_mixer/SDL_mixer.h>
#include <map>
#include <vector>
 
#include "ECS.h"
#include "TextureManager.h"
#include "BackgroundMusic.h"
#include "SoundEffects.h"
 
class GameInternal;

class SoundManager
{
 
    public:
 
        SoundManager() {
            if (this_instance == nullptr) {
                this_instance = this;
            }
            else {
                throw std::runtime_error("SoundManager instance already exists!");
            }
        }
        ~SoundManager() {
            for (auto& it : this->sound_cache) {
                Mix_FreeChunk(it.second);
            }
 
            for (auto& it : this->music_cache) {
                Mix_FreeMusic(it.second);
            }
        }
        
        SoundManager(SoundManager const&) = delete;
        void operator=(SoundManager const&) = delete;
 
        /*
         * \brief Loads music from a file (mp3)
         * \returns a pointer to Mix_Music
         * \sa AssetManager::AddMusic(std::string id, const char* path)
 
        Mix_Music* loadMusic(const char* fileName); 
        static void playSound(SoundEffects sound, bool canOverlap, int loops, int volume, int channel);
        static void playMusic(BackgroundMusic sound, int loops, int volume, int milliseconds);
 
        static void setSoundVolume(int volume, int channel); 
        static void setMusicVolume(int volume); 
 
        static void pauseSound(int channel); 
        static void pauseMusic(); 
 
        static void restartSound(int channel); 
        static void restartMusic(); 
 
        static void fadeOutMusic(int ms); 

        static void addSoundEffects(const std::map<SoundEffects, const char*> &effects);

        static void addBackgroundMusic(const std::map<BackgroundMusic, const char*> &backgroundMusic);
 
        static SoundManager* getInstance() {
            return this_instance;
        }
 
 
    private:
 
        std::map<BackgroundMusic, Mix_Music*> music_cache;
        std::map<SoundEffects, Mix_Chunk*> sound_cache;
        static SoundManager* this_instance;
 
        static void addSingleBackgroundMusic(BackgroundMusic backgroundMusic, const char* path);
        static void addSingleSoundEffect(SoundEffects soundEffect, const char* path);
};