/**
 * NotificationDropdown Component
 * Dropdown panel showing recent notifications
 */

import { useEffect, useRef } from 'react';
import { Link } from 'react-router-dom';
import { CheckCheck, Settings, Bell } from 'lucide-react';
import { useNotificationStore } from '../../../stores/notificationStore';
import NotificationItem from './NotificationItem';

interface NotificationDropdownProps {
  isOpen: boolean;
  onClose: () => void;
}

export default function NotificationDropdown({ isOpen, onClose }: NotificationDropdownProps) {
  const dropdownRef = useRef<HTMLDivElement>(null);
  const {
    notifications,
    unreadCount,
    loading,
    fetchNotifications,
    markAsRead,
    markAllAsRead,
    deleteNotification,
  } = useNotificationStore();

  // Fetch notifications when dropdown opens
  useEffect(() => {
    if (isOpen) {
      fetchNotifications();
    }
  }, [isOpen, fetchNotifications]);

  // Close on click outside
  useEffect(() => {
    function handleClickOutside(event: MouseEvent) {
      if (dropdownRef.current && !dropdownRef.current.contains(event.target as Node)) {
        onClose();
      }
    }

    if (isOpen) {
      document.addEventListener('mousedown', handleClickOutside);
    }

    return () => {
      document.removeEventListener('mousedown', handleClickOutside);
    };
  }, [isOpen, onClose]);

  // Close on Escape key
  useEffect(() => {
    function handleEscape(event: KeyboardEvent) {
      if (event.key === 'Escape') {
        onClose();
      }
    }

    if (isOpen) {
      document.addEventListener('keydown', handleEscape);
    }

    return () => {
      document.removeEventListener('keydown', handleEscape);
    };
  }, [isOpen, onClose]);

  if (!isOpen) return null;

  const recentNotifications = notifications.slice(0, 10);

  return (
    <div
      ref={dropdownRef}
      className="absolute right-0 top-full mt-2 w-96 bg-gray-800 border border-gray-700 rounded-xl shadow-xl z-50 overflow-hidden"
    >
      {/* Header */}
      <div className="flex items-center justify-between px-4 py-3 border-b border-gray-700">
        <h3 className="font-semibold text-white">Notificaciones</h3>
        <div className="flex items-center gap-2">
          {unreadCount > 0 && (
            <button
              onClick={() => markAllAsRead()}
              className="flex items-center gap-1 px-2 py-1 text-xs text-gray-400 hover:text-white rounded hover:bg-gray-700 transition-colors"
              title="Marcar todas como leídas"
            >
              <CheckCheck className="w-3.5 h-3.5" />
              <span>Leer todas</span>
            </button>
          )}
          <Link
            to="/settings/notifications"
            onClick={onClose}
            className="p-1 text-gray-400 hover:text-white rounded hover:bg-gray-700 transition-colors"
            title="Configuración"
          >
            <Settings className="w-4 h-4" />
          </Link>
        </div>
      </div>

      {/* Notification List */}
      <div className="max-h-96 overflow-y-auto">
        {loading ? (
          <div className="flex items-center justify-center py-8">
            <div className="animate-spin rounded-full h-6 w-6 border-b-2 border-primary-500" />
          </div>
        ) : recentNotifications.length === 0 ? (
          <div className="flex flex-col items-center justify-center py-12 text-gray-400">
            <Bell className="w-12 h-12 mb-3 opacity-50" />
            <p className="text-sm">No tienes notificaciones</p>
          </div>
        ) : (
          <div className="p-2 space-y-1">
            {recentNotifications.map((notification) => (
              <NotificationItem
                key={notification.id}
                notification={notification}
                onMarkAsRead={markAsRead}
                onDelete={deleteNotification}
                compact
              />
            ))}
          </div>
        )}
      </div>

      {/* Footer */}
      {notifications.length > 0 && (
        <div className="px-4 py-3 border-t border-gray-700 bg-gray-800/50">
          <Link
            to="/notifications"
            onClick={onClose}
            className="block text-center text-sm text-primary-400 hover:text-primary-300 transition-colors"
          >
            Ver todas las notificaciones
          </Link>
        </div>
      )}
    </div>
  );
}