import { useState, useEffect } from "react";
import { Link } from "react-router-dom";
import { Button } from "@/components/ui/button";
import { Sheet, SheetContent, SheetTrigger } from "@/components/ui/sheet";
import { Menu } from "lucide-react";
import { ThemeToggle } from "@/components/ThemeToggle";

export default function Header() {
  const [open, setOpen] = useState(false);
  const [scrolled, setScrolled] = useState(false);

  useEffect(() => {
    const fn = () => setScrolled(window.scrollY > 20);
    window.addEventListener("scroll", fn);
    return () => window.removeEventListener("scroll", fn);
  }, []);

  const links = [
    { label: "Menu", to: "/menu" },
    { label: "Reservations", to: "/reservations" },
    { label: "Events", to: "/events" },
    { label: "About", to: "/about" },
  ];

  return (
    <header className={`fixed top-0 inset-x-0 z-50 transition-all duration-300 ${scrolled ? "bg-stone-950/95 backdrop-blur-lg border-b border-stone-800 shadow-sm" : "bg-transparent"}`}>
      <div className="mx-auto max-w-7xl flex items-center justify-between px-6 py-4">
        <Link to="/" className="text-lg font-semibold tracking-widest uppercase text-white">Saffron Table</Link>
        <nav className="hidden md:flex items-center gap-8">
          {links.map((l) => (
            <Link key={l.to} to={l.to} className="text-sm text-stone-300 hover:text-amber-400 transition-colors tracking-wide uppercase">{l.label}</Link>
          ))}
        </nav>
        <div className="hidden md:flex items-center gap-3">
          <ThemeToggle />
          <Button asChild size="sm" className="bg-amber-700 hover:bg-amber-600 text-white rounded-none tracking-wide uppercase text-xs px-6 active:scale-[0.98]">
            <Link to="/reservations">Book a Table</Link>
          </Button>
        </div>
        <Sheet open={open} onOpenChange={setOpen}>
          <SheetTrigger asChild className="md:hidden">
            <Button variant="ghost" size="icon" className="text-white"><Menu className="h-5 w-5" /></Button>
          </SheetTrigger>
          <SheetContent side="right" className="w-72 bg-stone-950 border-stone-800">
            <nav className="mt-8 flex flex-col gap-4">
              {links.map((l) => (
                <Link key={l.to} to={l.to} className="text-lg font-medium text-stone-200 tracking-wide uppercase" onClick={() => setOpen(false)}>{l.label}</Link>
              ))}
              <Button asChild className="mt-4 w-full bg-amber-700 hover:bg-amber-600 text-white rounded-none tracking-wide uppercase active:scale-[0.98]">
                <Link to="/reservations" onClick={() => setOpen(false)}>Book a Table</Link>
              </Button>
              <ThemeToggle />
            </nav>
          </SheetContent>
        </Sheet>
      </div>
    </header>
  );
}