export interface FrequencyMapping {
  deepFreq: { min: number; max: number }; // 20-250Hz - Deep Earth Pulse
  midFreq: { min: number; max: number };  // 250-4000Hz - Heartwood Resonance  
  highFreq: { min: number; max: number }; // 4000-20000Hz - Canopy Shiver
}

export interface AudioData {
  frequencies: Uint8Array;
  deepEnergy: number;      // Normalized 0-1
  midEnergy: number;       // Normalized 0-1
  highEnergy: number;      // Normalized 0-1
  overallAmplitude: number; // Normalized 0-1
  peakDetected: boolean;
  beatDetected: boolean;
}

export interface PeakDetection {
  energyHistory: number[];
  historyLength: number;
  lastPeakTime: number;
  minTimeBetweenPeaks: number;
  sensitivity: number;
}

export interface BeatManager {
  currentWaveRadius: number;
  waveStrength: number;
  isWaveActive: boolean;
  triggerWave: (energy: number) => void;
  update: (deltaTime: number) => void;
  getWaveForce: (distance: number) => number;
}

export interface Track {
  id: string;
  title: string;
  artist: string;
  url: string;
  duration?: number;
}

export interface PlaybackState {
  isPlaying: boolean;
  currentTrack: Track | null;
  currentTime: number;
  volume: number;
  tracks: Track[];
}

export interface AudioEngine {
  initialize: () => Promise<void>;
  loadTrack: (track: Track) => Promise<void>;
  play: () => Promise<void>;
  pause: () => void;
  seekTo: (time: number) => void;
  setVolume: (volume: number) => void;
  getAudioData: () => AudioData;
  getCurrentTime: () => number;
  getDuration: () => number;
  getAudioElement: () => HTMLAudioElement | null;
  isPlaying: () => boolean;
  cleanup: () => void;
  setOnTrackEndedCallback: (callback: (() => void) | null) => void;
}