// This file is part of the 64k demo project.
// AudioEngine: Unified audio subsystem manager.
// Eliminates initialization order dependencies between synth and tracker.

#pragma once

#include "audio/spectrogram_resource_manager.h"
#include "audio/synth.h"
#include "audio/tracker.h"

// Unified audio engine managing synth, tracker, and resources
class AudioEngine {
 public:
  // Lifecycle
  void init();
  void shutdown();
  void reset();  // Clear all state (for seeking/rewinding)

  // Music data loading
  void load_music_data(const TrackerScore* score,
                       const NoteParams* samples,
                       const AssetId* sample_assets,
                       uint32_t sample_count);

  // Update loop
  void update(float music_time);

#if !defined(STRIP_ALL)
  // Timeline seeking (debugging only)
  void seek(float target_time);
  float get_time() const { return current_time_; }
#endif /* !defined(STRIP_ALL) */

  // Synth interface (delegates to internal synth)
  void render(float* output_buffer, int num_frames);
  int get_active_voice_count() const;

  // Tracker interface
  void tracker_reset();

  // Resource access
  SpectrogramResourceManager* get_resource_manager() { return &resource_mgr_; }

 private:
  // Trigger a sample (loads resource if needed, registers with synth)
  void trigger_sample(int sample_id, float volume, float pan);

  // Get or create synth ID for a sample
  int get_or_register_synth_id(int sample_id);

#if !defined(STRIP_ALL)
  // Seeking support
  void prewarm_for_time_range(float start_time, float end_time);
  void update_silent(float music_time);  // Update without triggering audio
#endif

  SpectrogramResourceManager resource_mgr_;

  // NOTE: For now, synth and tracker are global C functions (not members)
  // Future refactoring will convert them to member objects

  // Mapping: sample_id → synth_id (lazy registration)
  int sample_to_synth_id_[MAX_SPECTROGRAM_RESOURCES];

  float current_time_ = 0.0f;
  bool initialized_ = false;
};