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import { useEffect, useRef, useState } from 'react';
type PlayerStatus = 'idle' | 'loading' | 'playing' | 'paused' | 'error';
interface AudioPlayer {
status: PlayerStatus;
error: string | null;
volume: number;
play: (src: string) => void;
pause: () => void;
resume: () => void;
stop: () => void;
setVolume: (level: number) => void;
}
/**
* Lightweight audio controller for blob URLs returned by the TTS service.
*/
export function useAudioPlayer(): AudioPlayer {
const audioRef = useRef<HTMLAudioElement | null>(null);
const [status, setStatus] = useState<PlayerStatus>('idle');
const [error, setError] = useState<string | null>(null);
const [volume, setVolumeState] = useState<number>(() => {
const saved = localStorage.getItem('tts-volume');
return saved ? parseFloat(saved) : 0.7;
});
const cleanup = () => {
const audio = audioRef.current;
if (audio) {
audio.pause();
audio.src = '';
audioRef.current = null;
}
};
const stop = () => {
cleanup();
setStatus('idle');
};
const play = (src: string) => {
setError(null);
cleanup();
setStatus('loading');
const audio = new Audio(src);
audio.volume = volume;
audioRef.current = audio;
audio.oncanplay = () => {
audio.play().catch((err) => {
setError(err?.message || 'Failed to play audio.');
setStatus('error');
});
};
audio.onplay = () => setStatus('playing');
audio.onpause = () => setStatus((prev) => (prev === 'loading' ? 'loading' : 'paused'));
audio.onended = () => setStatus('idle');
audio.onerror = () => {
setError('Audio playback error.');
setStatus('error');
};
};
const pause = () => {
const audio = audioRef.current;
if (audio && !audio.paused) {
audio.pause();
}
};
const resume = () => {
const audio = audioRef.current;
if (audio && audio.paused) {
audio.play().catch((err) => {
setError(err?.message || 'Failed to resume audio.');
setStatus('error');
});
}
};
const setVolume = (level: number) => {
const clamped = Math.max(0, Math.min(1, level));
setVolumeState(clamped);
localStorage.setItem('tts-volume', clamped.toString());
if (audioRef.current) {
audioRef.current.volume = clamped;
}
};
useEffect(() => {
return () => {
cleanup();
};
}, []);
return { status, error, volume, play, pause, resume, stop, setVolume };
}
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