SfxSystem.hpp

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#pragma once
 
#include "SfxTypes.hpp"
#include "ecs/registry/Registry.hpp"
#include "particles/ParticleEvents.hpp"
 
#include <SDL3/SDL.h>
 
#include <array>
#include <cstdint>
 
class SfxSystem
{
public:
    bool init();
 
    void update(float dt, const Registry& registry);
 
    void quit();
 
    void play(SfxId id, float gain = 1.0f);
 
    void stop(SfxId id);
 
    // --- Volume control ---
    void setMasterVolume(float v) { masterVolume_ = v; }
    void setCategoryVolume(SfxCategory cat, float v);
    float masterVolume() const { return masterVolume_; }
    float categoryVolume(SfxCategory cat) const;
 
    // --- entt::dispatcher event handlers ---
    void onWeaponFired(const WeaponFiredEvent& e);
    void onExplosion(const ExplosionEvent& e);
 
    bool isInitialized() const { return device_ != 0; }
 
private:
    SDL_AudioDeviceID device_ = 0; 
 
    std::array<SoundClip, static_cast<size_t>(SfxId::_Count)> clips_;
 
    struct Voice
    {
        SDL_AudioStream* stream = nullptr; 
        bool active = false;
        SfxId playingId = SfxId::_Count;   
        float duration = 0.0f;             
        float elapsed = 0.0f;              
    };
    static constexpr int kMaxVoices = 32;
    std::array<Voice, kMaxVoices> voices_{};
 
    float masterVolume_ = 0.8f;
    std::array<float, static_cast<size_t>(SfxCategory::_Count)> categoryVolumes_{};
 
    std::array<float, static_cast<size_t>(SfxId::_Count)> cooldowns_{};
 
    // --- Client-side state tracking for event detection ---
    float prevHealth_ = 100.0f;
    float prevArmor_ = 100.0f;
    int prevDeaths_ = 0;
    int prevKills_ = 0;
    float healingSoundCooldown_ = 0.0f; 
    bool stateInitialized_ = false;     
 
    bool loadClip(SfxId id, const char* filename, SfxCategory cat, float gain, float cooldownSecs);
 
    Voice* acquireVoice();
 
    float effectiveGain(SfxId id, float extraGain) const;
};