// This file is part of the 64k demo project.
// It defines the tracker system for music composition.

#pragma once

#include "audio/gen.h"
#include "generated/assets.h"
#include <cstdint>

struct TrackerEvent {
  float unit_time;  // Unit-less time within pattern (0.0 to pattern.unit_length)
  uint16_t sample_id;
  float volume;
  float pan;
};

struct TrackerPattern {
  const TrackerEvent* events;
  uint32_t num_events;
  float unit_length;  // Pattern duration in units (typically 1.0 for 4-beat patterns)
};

struct TrackerPatternTrigger {
  float unit_time;  // Unit-less time when pattern triggers
  uint16_t pattern_id;
  // Modifiers could be added here
};

struct TrackerScore {
  const TrackerPatternTrigger* triggers;
  uint32_t num_triggers;
  float bpm;  // BPM is used only for playback scaling (1 unit = 4 beats)
};

// Global music data generated by tracker_compiler
extern const NoteParams g_tracker_samples[];
extern const uint32_t g_tracker_samples_count;
extern const AssetId g_tracker_sample_assets[];
extern const TrackerPattern g_tracker_patterns[];
extern const uint32_t g_tracker_patterns_count;
extern const TrackerScore g_tracker_score;

void tracker_init();
void tracker_update(float music_time_sec);
void tracker_reset(); // Reset tracker state (for tests/seeking)