'use client';

import {
  LayoutDashboard,
  Wallet,
  CreditCard,
  PiggyBank,
  Bell,
  Lightbulb,
  Settings,
  TrendingUp,
  X,
  LogOut,
} from 'lucide-react';
import Link from 'next/link';
import { useRouter } from 'next/navigation';
import { usePathname } from 'next/navigation';
import { Logo } from './Logo';

interface SidebarProps {
  isOpen: boolean;
  onClose: () => void;
  unreadAlertsCount?: number;
}

const navigationItems = [
  { name: 'Dashboard', href: '/', icon: LayoutDashboard },
  { name: 'Ingresos', href: '/incomes', icon: TrendingUp },
  { name: 'Deudas', href: '/debts', icon: Wallet },
  { name: 'Tarjetas', href: '/cards', icon: CreditCard },
  { name: 'Presupuesto', href: '/budget', icon: PiggyBank },
  { name: 'Servicios', href: '/services', icon: Lightbulb },
  { name: 'Configuración', href: '/settings', icon: Settings },
  { name: 'Alertas', href: '/alerts', icon: Bell, hasBadge: true },
];

export function Sidebar({
  isOpen,
  onClose,
  unreadAlertsCount = 0,
}: SidebarProps) {
  const pathname = usePathname();
  const router = useRouter();

  const isActive = (href: string) => {
    if (href === '/') {
      return pathname === '/';
    }
    return pathname.startsWith(href);
  };

  const handleLogout = async () => {
    try {
      await fetch('/api/auth/logout', { method: 'POST' });
      // Clear local data to avoid leaking to other users
      localStorage.removeItem('finanzas-storage');
      router.push('/login');
      router.refresh();
    } catch (e) {
      console.error('Logout failed', e);
    }
  };

  return (
    <>
      {/* Mobile overlay */}
      {isOpen && (
        <div
          className="fixed inset-0 bg-black/50 z-40 lg:hidden"
          onClick={onClose}
          aria-hidden="true"
        />
      )}

      {/* Sidebar */}
      <aside
        className={`
          fixed top-0 left-0 z-50 h-full w-64 bg-slate-900 border-r border-slate-800
          transform transition-transform duration-300 ease-in-out
          lg:translate-x-0 lg:static lg:h-screen
          ${isOpen ? 'translate-x-0' : '-translate-x-full'}
        `}
      >
        <div className="flex flex-col h-full">
          {/* Header */}
          <div className="flex items-center justify-between p-4 border-b border-slate-800">
            <Logo size="md" showText />
            <button
              onClick={onClose}
              className="lg:hidden p-2 text-slate-400 hover:text-slate-200 hover:bg-slate-800 rounded-lg transition-colors"
              aria-label="Cerrar menú"
            >
              <X className="w-5 h-5" />
            </button>
          </div>

          {/* Navigation */}
          <nav className="flex-1 overflow-y-auto py-4 px-3">
            <ul className="space-y-1">
              {navigationItems.map((item) => {
                const active = isActive(item.href);
                const Icon = item.icon;

                return (
                  <li key={item.name}>
                    <Link
                      href={item.href}
                      onClick={onClose}
                      className={`
                        flex items-center gap-3 px-3 py-2.5 rounded-lg text-sm font-medium
                        transition-colors relative
                        ${active
                          ? 'bg-slate-800 text-emerald-400 border-l-2 border-emerald-500'
                          : 'text-slate-300 hover:bg-slate-800 hover:text-slate-100'
                        }
                      `}
                    >
                      <Icon className="w-5 h-5 flex-shrink-0" />
                      <span className="flex-1">{item.name}</span>
                      {item.hasBadge && unreadAlertsCount > 0 && (
                        <span className="inline-flex items-center justify-center min-w-[20px] h-5 px-1.5 text-xs font-semibold bg-red-500 text-white rounded-full">
                          {unreadAlertsCount > 99 ? '99+' : unreadAlertsCount}
                        </span>
                      )}
                    </Link>
                  </li>
                );
              })}
            </ul>

            <div className="mt-auto px-3 py-3 border-t border-slate-800">
              <button
                onClick={handleLogout}
                className="w-full flex items-center gap-3 px-3 py-2.5 rounded-lg text-sm font-medium text-slate-400 hover:bg-red-500/10 hover:text-red-400 transition-colors"
              >
                <LogOut className="w-5 h-5 flex-shrink-0" />
                <span className="flex-1 text-left">Cerrar Sesión</span>
              </button>
            </div>
          </nav>

          {/* Footer */}
          <div className="p-4 border-t border-slate-800">
            <p className="text-xs text-slate-500 text-center">
              Finanzas v{process.env.NEXT_PUBLIC_APP_VERSION || '1.0.0'}
            </p>
          </div>
        </div>
      </aside>
    </>
  );
}