import {ToneDetector} from './test-signals.js';

// Explicit paired-signal mode only. Bounded numeric observations; never PCM.
class PairedSignals extends AudioWorkletProcessor {
    constructor() {
        super();this.detector=new ToneDetector(sampleRate);
        this.frames=0;this.inputFrames=0;this.zeros=0;this.energy=0;this.peak=0;
        this.events=[];this.overflow=0;this.credit=true;this.next=0;this.stopped=false;
        this.port.onmessage=({data})=>{if(data==='ack')this.credit=true;if(data==='stop')this.stopped=true;};
    }
    process(inputs,outputs) {
        if(this.stopped||this.frames>=sampleRate*125)return false;
        this.frames+=outputs[0]?.[0]?.length??128;
        const samples=inputs[0]?.[0];
        if(samples) {
            for(const x of samples){this.inputFrames++;this.energy+=x*x;this.peak=Math.max(this.peak,Math.abs(x));if(x===0)this.zeros++;}
            for(const event of this.detector.process(samples,currentFrame)) {
                if(this.events.length<32)this.events.push(event);else this.overflow++;
            }
        }
        if(this.credit&&this.frames>=this.next) {
            this.port.postMessage({activity:{inputFrames:this.inputFrames,processedFrames:this.frames,
                exactZeroFrames:this.zeros,rms:this.inputFrames?Math.sqrt(this.energy/this.inputFrames):0,
                peak:this.peak,sampleRate},signals:this.events,overflow:this.overflow});
            this.events=[];this.credit=false;this.next=this.frames+sampleRate;
        }
        // Browser initializes every output block to zero. No mic monitoring.
        return true;
    }
}
registerProcessor('av-paired-signals',PairedSignals);