import { useEffect } from 'react';

export interface KeyboardShortcut {
  key: string;
  ctrl?: boolean;
  alt?: boolean;
  shift?: boolean;
  description: string;
  action: () => void;
}

/**
 * Hook for managing keyboard shortcuts
 */
export function useKeyboardShortcuts(shortcuts: KeyboardShortcut[], enabled: boolean = true) {
  useEffect(() => {
    if (!enabled) return;

    const handleKeyDown = (event: KeyboardEvent) => {
      // Find matching shortcut
      const shortcut = shortcuts.find((s) => {
        const keyMatch = s.key.toLowerCase() === event.key.toLowerCase();
        const ctrlMatch = s.ctrl ? (event.ctrlKey || event.metaKey) : !event.ctrlKey && !event.metaKey;
        const altMatch = s.alt ? event.altKey : !event.altKey;
        const shiftMatch = s.shift ? event.shiftKey : !event.shiftKey;

        return keyMatch && ctrlMatch && altMatch && shiftMatch;
      });

      if (shortcut) {
        event.preventDefault();
        shortcut.action();
      }
    };

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

/**
 * Format shortcut key combination for display
 */
export function formatShortcut(shortcut: KeyboardShortcut): string {
  const parts: string[] = [];

  // Use Cmd on Mac, Ctrl on others
  const isMac = typeof window !== 'undefined' && /Mac|iPhone|iPod|iPad/.test(navigator.platform);

  if (shortcut.ctrl) {
    parts.push(isMac ? '⌘' : 'Ctrl');
  }

  if (shortcut.alt) {
    parts.push(isMac ? '⌥' : 'Alt');
  }

  if (shortcut.shift) {
    parts.push(isMac ? '⇧' : 'Shift');
  }

  parts.push(shortcut.key.toUpperCase());

  return parts.join(' + ');
}