/**
 * Hook pour gérer les raccourcis clavier du player
 * - Espace : play/pause
 * - Flèches gauche/droite : seek backward/forward
 * - Flèches haut/bas : volume up/down
 */

import { useEffect, useCallback } from 'react';
import type { PlayerHook } from '../types';

export interface UseKeyboardShortcutsOptions {
  enabled?: boolean;
  seekStep?: number; // En secondes
  volumeStep?: number; // En pourcentage
  preventDefault?: boolean;
}

const DEFAULT_SEEK_STEP = 5; // 5 secondes
const DEFAULT_VOLUME_STEP = 5; // 5%

export function useKeyboardShortcuts(
  player: PlayerHook,
  options: UseKeyboardShortcutsOptions = {},
) {
  const {
    enabled = true,
    seekStep = DEFAULT_SEEK_STEP,
    volumeStep = DEFAULT_VOLUME_STEP,
    preventDefault = true,
  } = options;

  const handleKeyDown = useCallback(
    (e: KeyboardEvent) => {
      if (!enabled) return;

      // Ignorer si l'utilisateur est en train de taper dans un input/textarea
      const target = e.target as HTMLElement;
      if (
        target &&
        (target.tagName === 'INPUT' ||
          target.tagName === 'TEXTAREA' ||
          target.isContentEditable === true)
      ) {
        return;
      }

      switch (e.code) {
        case 'Space': {
          // Espace : play/pause
          if (preventDefault) {
            e.preventDefault();
          }
          if (player.isPlaying) {
            player.pause();
          } else {
            player.resume();
          }
          break;
        }

        case 'ArrowLeft': {
          // Flèche gauche : reculer
          if (preventDefault) {
            e.preventDefault();
          }
          const newTime = Math.max(0, player.currentTime - seekStep);
          player.seek(newTime);
          break;
        }

        case 'ArrowRight': {
          // Flèche droite : avancer
          if (preventDefault) {
            e.preventDefault();
          }
          const newTime = Math.min(
            player.duration || 0,
            player.currentTime + seekStep,
          );
          player.seek(newTime);
          break;
        }

        case 'ArrowUp': {
          // Flèche haut : augmenter le volume
          if (preventDefault) {
            e.preventDefault();
          }
          const newVolume = Math.min(100, player.volume + volumeStep);
          player.setVolume(newVolume);
          break;
        }

        case 'ArrowDown': {
          // Flèche bas : diminuer le volume
          if (preventDefault) {
            e.preventDefault();
          }
          const newVolume = Math.max(0, player.volume - volumeStep);
          player.setVolume(newVolume);
          break;
        }

        default:
          break;
      }
    },
    [
      enabled,
      preventDefault,
      seekStep,
      volumeStep,
      player.isPlaying,
      player.currentTime,
      player.duration,
      player.volume,
      player.pause,
      player.resume,
      player.seek,
      player.setVolume,
    ],
  );

  useEffect(() => {
    if (!enabled) return;

    window.addEventListener('keydown', handleKeyDown);

    return () => {
      window.removeEventListener('keydown', handleKeyDown);
    };
  }, [enabled, handleKeyDown]);
}

export default useKeyboardShortcuts;