/**
 * 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, type PlaybackState } from '../events';

/**
 * Returns the current playback state, updating when it changes.
 */
export function usePlaybackState(): PlaybackState {
  const [state, setState] = useState<PlaybackState>(() =>
    TrackPlayer.getPlaybackState()
  );

  useEffect(() => {
    const sub = TrackPlayer.addEventListener(
      Event.PlaybackStateChanged,
      (event) => {
        setState(event.state);
      }
    );
    // 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') setState(TrackPlayer.getPlaybackState());
    });
    return () => {
      sub.remove();
      appStateSub.remove();
    };
  }, []);

  return state;
}