'use client';

import Link from 'next/link';
import { usePathname } from 'next/navigation';
import { cn } from '@horux/shared-ui';
import {
  LayoutDashboard,
  FileText,
  Calculator,
  Settings,
  LogOut,
  BarChart3,
  Calendar,
  Bell,
  Users,
  ChevronDown,
  Building2,
  Scale,
  Send,
} from 'lucide-react';
import { useAuthStore } from '@/stores/auth-store';
import { logout } from '@/lib/api/auth';
import { useRouter } from 'next/navigation';
import { useState } from 'react';
import { hasFeature, isGlobalAdminRfc, type Plan, type Role } from '@horux/shared';

const navigation: { name: string; href: string; icon: React.ElementType; feature?: string; roles?: Role[] }[] = [
  { name: 'Dashboard', href: '/dashboard', icon: LayoutDashboard, roles: ['owner', 'contador'] },
  { name: 'CFDI', href: '/cfdi', icon: FileText },
  { name: 'Impuestos', href: '/impuestos', icon: Calculator },
  { name: 'Reportes', href: '/reportes', icon: BarChart3, feature: 'reportes', roles: ['owner'] },
  { name: 'Conciliacion', href: '/conciliacion', icon: Scale, feature: 'conciliacion' },
  { name: 'Calendario', href: '/calendario', icon: Calendar, feature: 'calendario' },
  { name: 'Alertas', href: '/alertas', icon: Bell, feature: 'alertas' },
  { name: 'Facturación', href: '/facturacion', icon: Send, roles: ['owner', 'contador'] },
  { name: 'Usuarios', href: '/usuarios', icon: Users, roles: ['owner'] },
  { name: 'Config', href: '/configuracion', icon: Settings, roles: ['owner'] },
];

const adminNavigation = [
  { name: 'Clientes', href: '/clientes', icon: Building2 },
];

export function TopNav() {
  const pathname = usePathname();
  const router = useRouter();
  const { user, logout: clearAuth } = useAuthStore();
  const [userMenuOpen, setUserMenuOpen] = useState(false);

  const plan = (user?.plan || 'starter') as Plan;
  const role = user?.role || 'visor';
  const filteredNav = navigation.filter((item) => {
    if ('feature' in item && item.feature && !hasFeature(plan, item.feature)) return false;
    if ('roles' in item && item.roles && !item.roles.includes(role)) return false;
    return true;
  });

  const isGlobalAdmin = isGlobalAdminRfc(user?.tenantRfc, role, user?.platformRoles);
  const allNavigation = isGlobalAdmin
    ? [...filteredNav.slice(0, -1), ...adminNavigation, filteredNav[filteredNav.length - 1]]
    : filteredNav;

  const handleLogout = async () => {
    try {
      await logout();
    } catch {
      // Ignore errors
    } finally {
      clearAuth();
      router.push('/login');
    }
  };

  return (
    <header className="fixed top-0 left-0 right-0 z-40 h-16 border-b bg-card">
      <div className="flex h-full items-center px-6">
        {/* Logo */}
        <Link href="/dashboard" className="flex items-center gap-2 mr-8">
          <div className="h-8 w-8 rounded-lg bg-primary flex items-center justify-center">
            <span className="text-primary-foreground font-bold text-lg">H</span>
          </div>
          <span className="font-bold text-xl">Horux360</span>
        </Link>

        {/* Navigation */}
        <nav className="flex-1 flex items-center gap-1">
          {allNavigation.map((item) => {
            const isActive = pathname === item.href || pathname.startsWith(`${item.href}/`);
            return (
              <Link
                key={item.name}
                href={item.href}
                className={cn(
                  'flex items-center gap-2 rounded-lg px-3 py-2 text-sm font-medium transition-colors',
                  isActive
                    ? 'bg-primary text-primary-foreground'
                    : 'text-muted-foreground hover:bg-accent hover:text-accent-foreground'
                )}
              >
                <item.icon className="h-4 w-4" />
                <span className="hidden lg:inline">{item.name}</span>
              </Link>
            );
          })}
        </nav>

        {/* User Menu */}
        <div className="relative">
          <button
            onClick={() => setUserMenuOpen(!userMenuOpen)}
            className="flex items-center gap-2 rounded-lg px-3 py-2 text-sm font-medium hover:bg-accent transition-colors"
          >
            <div className="h-8 w-8 rounded-full bg-primary/10 flex items-center justify-center">
              <span className="text-primary font-medium text-sm">
                {user?.nombre?.charAt(0).toUpperCase()}
              </span>
            </div>
            <span className="hidden md:inline">{user?.nombre}</span>
            <ChevronDown className="h-4 w-4" />
          </button>

          {userMenuOpen && (
            <div className="absolute right-0 top-full mt-2 w-48 rounded-lg border bg-card shadow-lg">
              <div className="p-3 border-b">
                <p className="text-sm font-medium">{user?.nombre}</p>
                <p className="text-xs text-muted-foreground">{user?.email}</p>
              </div>
              <button
                onClick={handleLogout}
                className="flex w-full items-center gap-2 px-3 py-2 text-sm text-destructive hover:bg-destructive/10 transition-colors"
              >
                <LogOut className="h-4 w-4" />
                Cerrar sesión
              </button>
            </div>
          )}
        </div>
      </div>
    </header>
  );
}
