/**
 * Copyright (c) Double Symmetry GmbH
 * Commercial use requires a license. See https://rntp.dev/pricing
 */

import { useEffect, useState } from 'react';
import { AppState } from 'react-native';
import * as TrackPlayer from '../audio';
import { Event } from '../events';

/**
 * Returns whether the player is currently producing audio output.
 */
export function useIsPlaying(): boolean {
  const [playing, setPlaying] = useState<boolean>(() =>
    TrackPlayer.isPlaying()
  );

  useEffect(() => {
    const sub = TrackPlayer.addEventListener(
      Event.IsPlayingChanged,
      (event) => {
        setPlaying(event.playing);
      }
    );
    // Android background state changes bypass addEventListener (they reach the
    // headless handler instead), so re-read native state on foreground.
    const appStateSub = AppState.addEventListener('change', (status) => {
      if (status === 'active') setPlaying(TrackPlayer.isPlaying());
    });
    return () => {
      sub.remove();
      appStateSub.remove();
    };
  }, []);

  return playing;
}