/**
 * moduleRegistry.js — Defines all available module types
 * Each module type specifies: ports, params, icon, category, and audio factory
 */

export const PORT_TYPE = {
  AUDIO: 'audio',
  CONTROL: 'control',
  TRIGGER: 'trigger',
};

// Module type definitions
const registry = {};

export function defineModule(type, def) {
  registry[type] = { type, ...def };
}

export function getModuleDef(type) {
  return registry[type] || null;
}

export function getAllModuleDefs() {
  return Object.values(registry);
}

export function getModulesByCategory() {
  const cats = {};
  for (const def of Object.values(registry)) {
    if (!cats[def.category]) cats[def.category] = [];
    cats[def.category].push(def);
  }
  return cats;
}

// ==================== SOURCE ====================

defineModule('oscillator', {
  name: 'Oscillator',
  icon: '~',
  category: 'Source',
  inputs: [
    { name: 'freq', type: PORT_TYPE.AUDIO, label: 'Freq' },
    { name: 'detune', type: PORT_TYPE.CONTROL, label: 'Detune' },
  ],
  outputs: [
    { name: 'out', type: PORT_TYPE.AUDIO, label: 'Out' },
  ],
  params: {
    waveform: { type: 'select', options: ['sine', 'square', 'sawtooth', 'triangle'], default: 'sawtooth', label: 'Wave' },
    frequency: { type: 'knob', min: 20, max: 8000, default: 440, unit: 'Hz', label: 'Freq' },
    detune: { type: 'knob', min: -1200, max: 1200, default: 0, unit: 'ct', label: 'Detune' },
  },
});

defineModule('lfo', {
  name: 'LFO',
  icon: '∿',
  category: 'Source',
  inputs: [],
  outputs: [
    { name: 'out', type: PORT_TYPE.CONTROL, label: 'Out' },
  ],
  params: {
    waveform: { type: 'select', options: ['sine', 'square', 'sawtooth', 'triangle'], default: 'sine', label: 'Wave' },
    frequency: { type: 'knob', min: 0.01, max: 50, default: 2, unit: 'Hz', label: 'Rate' },
    amplitude: { type: 'knob', min: 0, max: 1, default: 0.5, unit: '', label: 'Depth' },
  },
});

defineModule('noise', {
  name: 'Noise',
  icon: '⣿',
  category: 'Source',
  inputs: [],
  outputs: [
    { name: 'out', type: PORT_TYPE.AUDIO, label: 'Out' },
  ],
  params: {
    type: { type: 'select', options: ['white', 'pink', 'brown'], default: 'white', label: 'Type' },
  },
});

// ==================== FILTER ====================

defineModule('filter', {
  name: 'Filter',
  icon: '▽',
  category: 'Filter',
  inputs: [
    { name: 'in', type: PORT_TYPE.AUDIO, label: 'In' },
    { name: 'cutoff', type: PORT_TYPE.CONTROL, label: 'Cutoff' },
  ],
  outputs: [
    { name: 'out', type: PORT_TYPE.AUDIO, label: 'Out' },
  ],
  params: {
    type: { type: 'select', options: ['lowpass', 'highpass', 'bandpass', 'notch'], default: 'lowpass', label: 'Type' },
    frequency: { type: 'knob', min: 20, max: 20000, default: 1000, unit: 'Hz', label: 'Cutoff' },
    Q: { type: 'knob', min: 0.1, max: 20, default: 1, unit: '', label: 'Reso' },
  },
});

// ==================== ENVELOPE ====================

defineModule('envelope', {
  name: 'Envelope',
  icon: '⏤╲',
  category: 'Modulation',
  inputs: [
    { name: 'gate', type: PORT_TYPE.TRIGGER, label: 'Gate' },
  ],
  outputs: [
    { name: 'out', type: PORT_TYPE.CONTROL, label: 'Out' },
  ],
  params: {
    attack: { type: 'knob', min: 0.001, max: 4, default: 0.01, unit: 's', label: 'Attack' },
    decay: { type: 'knob', min: 0.001, max: 4, default: 0.2, unit: 's', label: 'Decay' },
    sustain: { type: 'knob', min: 0, max: 1, default: 0.5, unit: '', label: 'Sustain' },
    release: { type: 'knob', min: 0.001, max: 8, default: 0.5, unit: 's', label: 'Release' },
  },
});

// ==================== AMPLIFIER ====================

defineModule('vca', {
  name: 'VCA',
  icon: '△',
  category: 'Utility',
  inputs: [
    { name: 'in', type: PORT_TYPE.AUDIO, label: 'In' },
    { name: 'cv', type: PORT_TYPE.CONTROL, label: 'CV' },
  ],
  outputs: [
    { name: 'out', type: PORT_TYPE.AUDIO, label: 'Out' },
  ],
  params: {
    gain: { type: 'knob', min: 0, max: 1, default: 0.8, unit: '', label: 'Gain' },
  },
});

// ==================== EFFECTS ====================

defineModule('delay', {
  name: 'Delay',
  icon: '⟫',
  category: 'Effect',
  inputs: [
    { name: 'in', type: PORT_TYPE.AUDIO, label: 'In' },
  ],
  outputs: [
    { name: 'out', type: PORT_TYPE.AUDIO, label: 'Out' },
  ],
  params: {
    delayTime: { type: 'knob', min: 0.01, max: 2, default: 0.3, unit: 's', label: 'Time' },
    feedback: { type: 'knob', min: 0, max: 0.95, default: 0.4, unit: '', label: 'Feedbk' },
    wet: { type: 'knob', min: 0, max: 1, default: 0.5, unit: '', label: 'Mix' },
  },
});

defineModule('reverb', {
  name: 'Reverb',
  icon: '◌',
  category: 'Effect',
  inputs: [
    { name: 'in', type: PORT_TYPE.AUDIO, label: 'In' },
  ],
  outputs: [
    { name: 'out', type: PORT_TYPE.AUDIO, label: 'Out' },
  ],
  params: {
    decay: { type: 'knob', min: 0.1, max: 15, default: 3, unit: 's', label: 'Decay' },
    wet: { type: 'knob', min: 0, max: 1, default: 0.4, unit: '', label: 'Mix' },
  },
});

defineModule('distortion', {
  name: 'Distortion',
  icon: '⚡',
  category: 'Effect',
  inputs: [
    { name: 'in', type: PORT_TYPE.AUDIO, label: 'In' },
  ],
  outputs: [
    { name: 'out', type: PORT_TYPE.AUDIO, label: 'Out' },
  ],
  params: {
    distortion: { type: 'knob', min: 0, max: 1, default: 0.4, unit: '', label: 'Drive' },
    wet: { type: 'knob', min: 0, max: 1, default: 0.5, unit: '', label: 'Mix' },
  },
});

// ==================== MIXER ====================

defineModule('mixer', {
  name: 'Mixer',
  icon: '≡',
  category: 'Utility',
  inputs: [
    { name: 'in1', type: PORT_TYPE.AUDIO, label: 'In 1' },
    { name: 'in2', type: PORT_TYPE.AUDIO, label: 'In 2' },
    { name: 'in3', type: PORT_TYPE.AUDIO, label: 'In 3' },
    { name: 'in4', type: PORT_TYPE.AUDIO, label: 'In 4' },
  ],
  outputs: [
    { name: 'out', type: PORT_TYPE.AUDIO, label: 'Out' },
  ],
  params: {
    gain1: { type: 'knob', min: 0, max: 1, default: 0.8, unit: '', label: 'Ch 1' },
    gain2: { type: 'knob', min: 0, max: 1, default: 0.8, unit: '', label: 'Ch 2' },
    gain3: { type: 'knob', min: 0, max: 1, default: 0.8, unit: '', label: 'Ch 3' },
    gain4: { type: 'knob', min: 0, max: 1, default: 0.8, unit: '', label: 'Ch 4' },
  },
});

// ==================== SCOPE ====================

defineModule('scope', {
  name: 'Scope',
  icon: '📊',
  category: 'Utility',
  inputs: [
    { name: 'in', type: PORT_TYPE.AUDIO, label: 'In' },
  ],
  outputs: [],
  params: {},
});

// ==================== CV TO GATE ====================

defineModule('cv2gate', {
  name: 'CV→Gate',
  icon: '⚡',
  category: 'Utility',
  inputs: [
    { name: 'in', type: PORT_TYPE.CONTROL, label: 'CV In' },
  ],
  outputs: [
    { name: 'gate', type: PORT_TYPE.TRIGGER, label: 'Gate' },
  ],
  params: {
    threshold: { type: 'knob', min: 0, max: 1, default: 0.5, unit: '', label: 'Thresh' },
  },
});

// ==================== OUTPUT ====================

defineModule('output', {
  name: 'Output',
  icon: '🔊',
  category: 'Output',
  inputs: [
    { name: 'left', type: PORT_TYPE.AUDIO, label: 'Left' },
    { name: 'right', type: PORT_TYPE.AUDIO, label: 'Right' },
  ],
  outputs: [],
  params: {
    volume: { type: 'knob', min: -60, max: 6, default: -6, unit: 'dB', label: 'Volume' },
  },
});

// ==================== KEYBOARD ====================

defineModule('keyboard', {
  name: 'Keyboard',
  icon: '🎹',
  category: 'Source',
  inputs: [],
  outputs: [
    { name: 'freq', type: PORT_TYPE.AUDIO, label: 'Freq' },
    { name: 'gate', type: PORT_TYPE.TRIGGER, label: 'Gate' },
  ],
  params: {
    octave: { type: 'knob', min: 1, max: 8, default: 4, unit: '', label: 'Octave' },
  },
});

// ==================== DRUM PAD ====================

defineModule('drumpad', {
  name: 'Drum Pad',
  icon: '🥁',
  category: 'Source',
  inputs: [],
  outputs: [
    { name: 'freq', type: PORT_TYPE.AUDIO, label: 'Freq' },
    { name: 'gate', type: PORT_TYPE.TRIGGER, label: 'Gate' },
  ],
  params: {},
});

// ==================== SEQUENCER ====================

defineModule('sequencer', {
  name: 'Sequencer',
  icon: '▦',
  category: 'Source',
  inputs: [],
  outputs: [
    { name: 'freq', type: PORT_TYPE.AUDIO, label: 'Freq' },
    { name: 'gate', type: PORT_TYPE.TRIGGER, label: 'Gate' },
  ],
  params: {
    bpm: { type: 'knob', min: 40, max: 300, default: 140, unit: 'bpm', label: 'BPM' },
    steps: { type: 'select', options: ['8', '16', '32'], default: '16', label: 'Steps' },
    swing: { type: 'knob', min: 0, max: 0.5, default: 0, unit: '', label: 'Swing' },
  },
  // Custom data: step notes/gates stored in module.params._steps
});

// ==================== PIANO ROLL ====================

defineModule('pianoroll', {
  name: 'Piano Roll',
  icon: '🎼',
  category: 'Source',
  inputs: [],
  outputs: [
    { name: 'freq', type: PORT_TYPE.AUDIO, label: 'Freq' },
    { name: 'gate', type: PORT_TYPE.TRIGGER, label: 'Gate' },
  ],
  params: {
    bpm: { type: 'knob', min: 40, max: 300, default: 140, unit: 'bpm', label: 'BPM' },
    loop: { type: 'select', options: ['on', 'off'], default: 'on', label: 'Loop' },
    bars: { type: 'select', options: ['1', '2', '4', '8'], default: '4', label: 'Bars' },
  },
  // Custom data: notes stored in module.params._notes = [{note, start, duration}, ...]
});