/* V7 Audio Module */
import { state } from './state.js';

let audioContext = null;
let analyser = null;
let dataArray = null;

export function initAudio() {
    if (audioContext) return;

    try {
        audioContext = new (window.AudioContext || window.webkitAudioContext)();
        analyser = audioContext.createAnalyser();
        analyser.fftSize = 64;

        navigator.mediaDevices.getUserMedia({ audio: true })
            .then(stream => {
                const source = audioContext.createMediaStreamSource(stream);
                source.connect(analyser);
                dataArray = new Uint8Array(analyser.frequencyBinCount);
            })
            .catch(err => {
                console.error("Audio Access Denied", err);
                alert("Microphone access denied. Visualizer disabled.");
                state.audioMode = false;
                // Dispatch event to uncheck box? handled by loop checking state
            });
    } catch (e) {
        console.error(e);
    }
}

export function getAudioData() {
    if (!audioContext || !analyser || !state.audioMode) return null;

    analyser.getByteFrequencyData(dataArray);

    const avg = dataArray.reduce((p, c) => p + c, 0) / dataArray.length;
    const bass = dataArray[2];

    return { avg, bass };
}