Player2Synth.js

import * as Tone from 'https://esm.sh/tone';

// Player 2: Simple beatpad — each finger triggers a distinct percussion hit
// Hand height controls pitch, spread controls reverb
export class Player2Synth {
    constructor() {
        this.isStarted = false;
        this._panicMuted = false;
        this.activePatterns = new Map();
        this.padSynths = this.activePatterns;
        this.currentSynthIndex = 0;
        this.padPresets = [{ name: 'BEATPAD' }];
        this.currentStyleLabel = 'BEATPAD';
        this.scale = ['C2','D2','E2','F2','G2','A2','B2','C3','D3','E3','F3','G3','A3','B3','C4','D4','E4','F4','G4','A4','B4','C5'];
        this._fingerStates = {};
        this._drumCooldowns = {};
    }

    async start() {
        if (this.isStarted) return;
        await Tone.start();

        this.limiter = new Tone.Limiter(-3).toDestination();
        this.reverb = new Tone.Reverb({ decay: 1.5, wet: 0.15 }).connect(this.limiter);

        // Kick — deep thump
        this.kick = new Tone.MembraneSynth({
            pitchDecay: 0.05, octaves: 8,
            envelope: { attack: 0.001, decay: 0.2, sustain: 0, release: 0.3 }
        }).connect(this.limiter);

        // Snare — noise burst + body
        this.snare = new Tone.NoiseSynth({
            noise: { type: 'white' },
            envelope: { attack: 0.001, decay: 0.12, sustain: 0 }
        }).connect(this.reverb);

        // Hi-hat — short bright noise
        this.hihat = new Tone.NoiseSynth({
            noise: { type: 'white' },
            envelope: { attack: 0.001, decay: 0.04, sustain: 0 }
        }).connect(this.limiter);
        this.hihat.volume.value = -6;

        // Clap — layered noise
        this.clap = new Tone.NoiseSynth({
            noise: { type: 'pink' },
            envelope: { attack: 0.001, decay: 0.15, sustain: 0 }
        }).connect(this.reverb);

        // Percussion — tonal hit (tom/conga)
        this.tom = new Tone.MembraneSynth({
            pitchDecay: 0.08, octaves: 4,
            envelope: { attack: 0.001, decay: 0.15, sustain: 0, release: 0.2 }
        }).connect(this.reverb);

        // Peruvian flute — breathy sine+triangle with vibrato and delay
        this.flute = new Tone.Synth({
            oscillator: { type: 'sine' },
            envelope: { attack: 0.08, decay: 0.1, sustain: 0.6, release: 0.4 }
        });
        this.fluteVibrato = new Tone.Vibrato({ frequency: 5, depth: 0.15 });
        this.fluteDelay = new Tone.PingPongDelay('4n', 0.25);
        this.fluteDelay.wet.value = 0.3;
        this.flute.connect(this.fluteVibrato);
        this.fluteVibrato.connect(this.fluteDelay);
        this.fluteDelay.connect(this.reverb);
        // Pentatonic flute scale (Andean)
        this._fluteScale = ['E4','G4','A4','B4','D5','E5','G5','A5','B5','D6','E6'];
        this._fluteHeld = false;

        this.isStarted = true;
        console.log('[Beatpad] Started');
    }

    // Synth hand: height controls tom pitch, each finger triggers a pad
    updateGesture(handId, gestureData) {
        if (!this.isStarted || this._panicMuted) return;

        const ext = gestureData.fingerExtensions || {};
        const prev = this._fingerStates;

        // Thumb = kick, Middle = hihat, Ring = clap, Pinky = tom
        this._triggerOnOpen('thumb', ext.thumb, prev.thumb, () => {
            const note = gestureData.rootNote || 'C2';
            this.kick.triggerAttackRelease(note, '8n');
        });
        this._triggerOnOpen('middle', ext.middle, prev.middle, () => {
            this.hihat.triggerAttackRelease('32n');
        });
        this._triggerOnOpen('ring', ext.ring, prev.ring, () => {
            this.clap.triggerAttackRelease('8n');
        });
        this._triggerOnOpen('pinky', ext.pinky, prev.pinky, () => {
            const note = gestureData.rootNote || 'C3';
            this.tom.triggerAttackRelease(note, '8n');
        });

        // Index = Peruvian flute — held while finger is up, pitch from hand height
        if ((ext.index || 0) > 0.45) {
            const handY = gestureData.rootNote ? this.scale.indexOf(gestureData.rootNote) : 10;
            const fluteIdx = Math.floor((handY / this.scale.length) * this._fluteScale.length);
            const fluteNote = this._fluteScale[Math.max(0, Math.min(this._fluteScale.length - 1, fluteIdx))];
            if (!this._fluteHeld) {
                this.flute.triggerAttack(fluteNote);
                this._fluteHeld = true;
            } else {
                this.flute.frequency.rampTo(Tone.Frequency(fluteNote).toFrequency(), 0.15);
            }
        } else if (this._fluteHeld) {
            this.flute.triggerRelease();
            this._fluteHeld = false;
        }

        // Save state for next frame
        this._fingerStates = {
            thumb: ext.thumb || 0,
            index: ext.index || 0,
            middle: ext.middle || 0,
            ring: ext.ring || 0,
            pinky: ext.pinky || 0
        };

        // Wrist angle controls reverb amount
        const wrist = Math.abs(gestureData.wristAngle || 0);
        if (this.reverb) this.reverb.wet.value = wrist * 0.5;
    }

    _triggerOnOpen(finger, current, previous, callback) {
        const now = performance.now();
        const cd = this._drumCooldowns[finger] || 0;
        if ((current || 0) > 0.45 && (previous || 0) <= 0.45 && now - cd > 120) {
            this._drumCooldowns[finger] = now;
            callback();
        }
    }

    // Drum hand: same per-finger triggers but with repeat while held
    updateDrumGesture(gestureData) {
        if (!this.isStarted || this._panicMuted) return;
        const ext = gestureData.fingerExtensions || {};

        // Retrigger while finger is held open (every 200ms)
        this._retrigger('d_thumb', ext.thumb, () => this.kick.triggerAttackRelease('C1', '8n'));
        this._retrigger('d_index', ext.index, () => this.snare.triggerAttackRelease('16n'));
        this._retrigger('d_middle', ext.middle, () => this.hihat.triggerAttackRelease('32n'));
        this._retrigger('d_ring', ext.ring, () => this.clap.triggerAttackRelease('8n'));
        this._retrigger('d_pinky', ext.pinky, () => this.tom.triggerAttackRelease('G2', '16n'));
    }

    _retrigger(key, value, callback) {
        const now = performance.now();
        const cd = this._drumCooldowns[key] || 0;
        if ((value || 0) > 0.5 && now - cd > 200) {
            this._drumCooldowns[key] = now;
            callback();
        }
    }

    triggerFingerTouch(f1, f2) {
        if (!this.isStarted || this._panicMuted) return;
        // Any finger touch = rimshot
        this.tom.triggerAttackRelease('E4', '32n');
    }

    // Stubs for game.js compatibility
    startArpeggio() {}
    stopArpeggio() {}
    updateArpeggio() {}
    updateArpeggioVolume() {}
    updateFingerExpression() {}
    setProximityFilter() {}
    setSynthHandOpen() {}
    setDrumHandFist() {}
    stopShapeBass() {}
    updateShapeBass() {}
    updateShapeAudio() {}
    cycleSynth() { console.log('[Beatpad] Cycle — only one mode'); }
    panic() { this._panicMuted = !this._panicMuted; }
    handLeft() {}
    ensureAudioActive() { if (Tone.context.state === 'suspended') Tone.context.resume(); }
    getAnalyser() { return null; }
    getAnalyserData() { return new Float32Array(2048); }
}