'use client';

import { Home, Phone, Ticket, User } from 'lucide-react';
import Link from 'next/link';
import { usePathname } from 'next/navigation';
import { useAuthStore } from '@/lib/auth-store';

// The linear, one-screen-at-a-time booking flow — each of these pages already
// has its own sticky mobile CTA bar (and the mobile step strip at the top),
// so the tab bar hides rather than stacking a second bottom bar underneath.
const LINEAR_FLOW_PREFIXES = [
  '/booking/search',
  '/booking/results',
  '/booking/seats',
  '/booking/passengers',
  '/booking/auth-check',
  '/booking/review',
  '/booking/payment',
  '/booking/confirmation',
];

export default function BottomTabBar() {
  const pathname = usePathname() ?? '';
  const isAuthenticated = useAuthStore((s) => s.isAuthenticated);

  const isInLinearFlow = LINEAR_FLOW_PREFIXES.some((p) => pathname.startsWith(p));
  if (isInLinearFlow) return null;

  const tabs = [
    { href: '/', label: 'Home', icon: Home, match: (p: string) => p === '/' },
    { href: '/booking/lookup', label: 'Bookings', icon: Ticket, match: (p: string) => p.startsWith('/booking/lookup') || p.startsWith('/booking/detail') },
    { href: '/contact', label: 'Contact', icon: Phone, match: (p: string) => p.startsWith('/contact') },
    {
      href: isAuthenticated ? '/profile' : '/login',
      label: isAuthenticated ? 'Account' : 'Sign in',
      icon: User,
      match: (p: string) => p.startsWith('/profile') || p.startsWith('/login') || p.startsWith('/register'),
    },
  ];

  return (
    <>
      {/* In-flow spacer so page content/Footer can't end up hidden behind the
          fixed bar below — self-contained here so it only exists when the
          bar itself is actually rendered. */}
      <div className="lg:hidden h-16" aria-hidden="true" />
      <nav className="lg:hidden fixed bottom-0 inset-x-0 z-40 bg-white dark:bg-gray-900 border-t border-gray-200 dark:border-gray-800 shadow-[0_-2px_10px_rgba(0,0,0,0.05)]">
        <ul className="flex items-stretch">
          {tabs.map(({ href, label, icon: Icon, match }) => {
            const isActive = match(pathname);
            return (
              <li key={href} className="flex-1">
                <Link
                  href={href}
                  className={`flex flex-col items-center justify-center gap-0.5 py-2.5 text-[11px] font-medium transition-colors ${
                    isActive ? 'text-primary' : 'text-gray-500 dark:text-gray-400'
                  }`}
                >
                  <Icon className={`w-5 h-5 ${isActive ? 'text-primary' : ''}`} strokeWidth={isActive ? 2.5 : 2} />
                  {label}
                </Link>
              </li>
            );
          })}
        </ul>
      </nav>
    </>
  );
}