"use client";

import Image from "next/image";
import Link from "next/link";
import { usePathname, useSearchParams } from "next/navigation";
import { Heart, Menu, MessageCircle, PackageCheck, ShoppingCart, UserRound } from "lucide-react";
import { Suspense, useState } from "react";
import { PredictiveSearch } from "@/components/search/predictive-search";
import { Button } from "@/components/ui/button";
import { Dialog, DialogContent } from "@/components/ui/dialog";
import { Sheet, SheetContent, SheetDescription, SheetHeader, SheetTitle } from "@/components/ui/sheet";
import type { Product } from "@/lib/headless/types";
import { useCartStore } from "@/store/cart-store";
import { useWishlistStore } from "@/store/wishlist-store";

type CategoryLink = {
  label: string;
  href: string;
  category?: string;
  collection?: string;
  section?: string;
  root?: boolean;
};

const categories: CategoryLink[] = [
  { label: "Juguetes para bebés", href: "/catalog?category=Figuras", category: "Figuras" },
  {
    label: "Educativos",
    href: "/catalog?category=Figuras&section=educativos",
    category: "Figuras",
    section: "educativos",
  },
  { label: "Muñecas y peluches", href: "/catalog?category=Peluches", category: "Peluches" },
  { label: "Acción y aventura", href: "/catalog?collection=Marvel", collection: "Marvel" },
  { label: "Mochilas", href: "/catalog?category=Mochilas", category: "Mochilas" },
  { label: "Variedades", href: "/catalog", root: true },
];

const collections = ["Toy Story", "Marvel", "Intensamente", "Lilo & Stitch", "Frozen"];

export function Navbar({ products }: { products: Product[] }) {
  const [menuOpen, setMenuOpen] = useState(false);
  const [accountOpen, setAccountOpen] = useState(false);
  const items = useCartStore((state) => state.items);
  const cartHydrated = useCartStore((state) => state.hasHydrated);
  const openCart = useCartStore((state) => state.openCart);
  const wishlistProducts = useWishlistStore((state) => state.products);
  const wishlistHydrated = useWishlistStore((state) => state.hasHydrated);
  const openWishlist = useWishlistStore((state) => state.openWishlist);
  const count = cartHydrated ? items.reduce((sum, item) => sum + item.quantity, 0) : 0;
  const wishlistCount = wishlistHydrated ? wishlistProducts.length : 0;

  return (
    <header className="sticky top-0 z-40 border-b border-slate-200/80 bg-white/95 shadow-sm backdrop-blur-xl">
      <div className="bg-gradient-to-r from-amber-300 via-yellow-200 to-lime-200 px-4 py-2 text-center text-xs font-black text-slate-950 sm:text-sm">
        Paga tus compras a cuotas · Envíos nacionales · <span className="underline decoration-2 underline-offset-2">Compra segura con ARI</span>
      </div>

      <div className="relative overflow-visible bg-white">
        <div className="pointer-events-none absolute inset-x-0 top-0 h-1 bg-gradient-to-r from-cyan-400 via-violet-500 to-fuchsia-500" />
        <div className="mx-auto grid max-w-7xl grid-cols-[72px_1fr_auto] items-center gap-4 px-4 py-4 lg:grid-cols-[92px_minmax(420px,1fr)_auto] lg:gap-8">
          <Link href="/" className="relative size-16 overflow-hidden rounded-full border-2 border-slate-900 bg-black shadow-lg lg:size-20">
            <Image src="/images/brand/logo-ari.png" alt="ARI Shopping" fill priority sizes="80px" className="object-cover" />
          </Link>
          <PredictiveSearch products={products} />
          <div className="flex items-center gap-2">
            <Button variant="outline" size="icon" aria-label="Mi cuenta" className="hidden border-slate-300 bg-white text-slate-900 hover:border-violet-400 hover:bg-violet-50 sm:inline-flex" onClick={() => setAccountOpen(true)}><UserRound /></Button>
            <Button variant="outline" size="icon" aria-label={`Favoritos: ${wishlistCount}`} className="relative hidden border-slate-300 bg-white text-slate-900 hover:border-fuchsia-400 hover:bg-fuchsia-50 sm:inline-flex" onClick={openWishlist}>
              <Heart />
              {wishlistCount > 0 && <span className="absolute -right-1.5 -top-1.5 grid size-5 place-items-center rounded-full bg-violet-600 text-[10px] font-black text-white">{wishlistCount}</span>}
            </Button>
            <Button variant="magenta" size="icon" onClick={openCart} aria-label={`Carrito con ${count} productos`} className="relative shadow-lg shadow-fuchsia-500/20">
              <ShoppingCart />
              <span className="absolute -right-2 -top-2 grid size-6 place-items-center rounded-full bg-yellow-300 text-[11px] font-black text-slate-950">{count}</span>
            </Button>
          </div>
        </div>
      </div>

      <Suspense fallback={<DesktopCategoryNavigationFallback onOpenMenu={() => setMenuOpen(true)} />}>
        <DesktopCategoryNavigation onOpenMenu={() => setMenuOpen(true)} />
      </Suspense>

      <Sheet open={menuOpen} onOpenChange={setMenuOpen}>
        <SheetContent side="left" className="max-w-sm">
          <SheetHeader>
            <SheetTitle>Explora ARI</SheetTitle>
            <SheetDescription>Categorías y colecciones del catálogo.</SheetDescription>
          </SheetHeader>
          <div className="flex-1 overflow-y-auto p-6">
            <p className="mb-3 text-xs font-black uppercase tracking-[.16em] text-fuchsia-600">Categorías</p>
            <div className="grid gap-2">
              <Suspense fallback={<MobileCategoryLinksFallback onNavigate={() => setMenuOpen(false)} />}>
                <MobileCategoryLinks onNavigate={() => setMenuOpen(false)} />
              </Suspense>
            </div>
            <p className="mb-3 mt-8 text-xs font-black uppercase tracking-[.16em] text-violet-600">Colecciones</p>
            <div className="flex flex-wrap gap-2">
              {collections.map((collection) => <Link key={collection} href={`/catalog?collection=${encodeURIComponent(collection)}`} onClick={() => setMenuOpen(false)} className="rounded-full bg-slate-100 px-4 py-2 text-sm font-bold hover:bg-violet-100 hover:text-violet-700">{collection}</Link>)}
            </div>
            <div className="mt-8 grid grid-cols-2 gap-3 sm:hidden">
              <Button variant="outline" onClick={() => { setMenuOpen(false); setAccountOpen(true); }}><UserRound className="size-4" />Cuenta</Button>
              <Button variant="outline" onClick={() => { setMenuOpen(false); openWishlist(); }}><Heart className="size-4" />Favoritos</Button>
            </div>
          </div>
        </SheetContent>
      </Sheet>

      <Dialog open={accountOpen} onOpenChange={setAccountOpen}>
        <DialogContent className="max-w-lg p-7">
          <div className="pr-10">
            <span className="text-xs font-black uppercase tracking-[.16em] text-violet-600">Atención personalizada</span>
            <h2 className="mt-3 text-3xl font-black">Tu cuenta ARI</h2>
            <p className="mt-3 text-sm leading-6 text-slate-600">El inicio de sesión quedará conectado al backend headless. Mientras tanto, puedes gestionar pedidos y disponibilidad directamente por WhatsApp.</p>
            <div className="mt-6 grid gap-3">
              <Button asChild variant="magenta" size="lg"><a href={process.env.NEXT_PUBLIC_WHATSAPP_URL ?? "https://wa.link/rvcqqc"} target="_blank" rel="noopener noreferrer"><MessageCircle />Hablar con ARI</a></Button>
              <Button asChild variant="outline"><Link href="/catalog" onClick={() => setAccountOpen(false)}><PackageCheck />Ver mis opciones de compra</Link></Button>
            </div>
          </div>
        </DialogContent>
      </Dialog>
    </header>
  );
}

function useCategoryNavigationState() {
  const pathname = usePathname();
  const searchParams = useSearchParams();
  const currentCategory = searchParams.get("category") ?? "";
  const currentCollection = searchParams.get("collection") ?? "";
  const currentSection = searchParams.get("section") ?? "";
  const isCatalog = pathname === "/catalog";

  const isCategoryActive = (item: CategoryLink) => {
    if (!isCatalog) return false;

    if (item.root) {
      return !currentCategory && !currentCollection && !currentSection;
    }

    return (
      (item.category ?? "") === currentCategory &&
      (item.collection ?? "") === currentCollection &&
      (item.section ?? "") === currentSection
    );
  };

  return { isCategoryActive };
}

function DesktopCategoryNavigation({ onOpenMenu }: { onOpenMenu: () => void }) {
  const { isCategoryActive } = useCategoryNavigationState();

  return (
    <nav className="border-b-4 border-fuchsia-500 bg-slate-950 text-white">
      <div className="mx-auto flex max-w-7xl items-center gap-1 overflow-x-auto px-4 py-2 [scrollbar-width:none]">
        <Button
          variant="ghost"
          size="icon"
          onClick={onOpenMenu}
          aria-label="Abrir menú principal"
          className="mr-3 shrink-0 text-white hover:bg-white/10"
        >
          <Menu />
        </Button>

        {categories.map((category) => {
          const active = isCategoryActive(category);

          return (
            <Link
              key={category.label}
              href={category.href}
              prefetch={false}
              aria-current={active ? "page" : undefined}
              className={`shrink-0 rounded-full px-4 py-2 text-sm font-extrabold transition ${
                active
                  ? "bg-gradient-to-r from-cyan-500 to-violet-500 text-white shadow-lg shadow-violet-950/30"
                  : "text-white/90 hover:bg-gradient-to-r hover:from-cyan-500 hover:to-violet-500 hover:text-white"
              }`}
            >
              {category.label}
            </Link>
          );
        })}
      </div>
    </nav>
  );
}

function DesktopCategoryNavigationFallback({ onOpenMenu }: { onOpenMenu: () => void }) {
  return (
    <nav className="border-b-4 border-fuchsia-500 bg-slate-950 text-white">
      <div className="mx-auto flex max-w-7xl items-center gap-1 overflow-x-auto px-4 py-2 [scrollbar-width:none]">
        <Button
          variant="ghost"
          size="icon"
          onClick={onOpenMenu}
          aria-label="Abrir menú principal"
          className="mr-3 shrink-0 text-white hover:bg-white/10"
        >
          <Menu />
        </Button>

        {categories.map((category) => (
          <Link
            key={category.label}
            href={category.href}
            prefetch={false}
            className="shrink-0 rounded-full px-4 py-2 text-sm font-extrabold text-white/90 transition hover:bg-gradient-to-r hover:from-cyan-500 hover:to-violet-500 hover:text-white"
          >
            {category.label}
          </Link>
        ))}
      </div>
    </nav>
  );
}

function MobileCategoryLinks({ onNavigate }: { onNavigate: () => void }) {
  const { isCategoryActive } = useCategoryNavigationState();

  return (
    <>
      {categories.map((category) => {
        const active = isCategoryActive(category);

        return (
          <Link
            key={category.label}
            href={category.href}
            prefetch={false}
            aria-current={active ? "page" : undefined}
            onClick={onNavigate}
            className={`rounded-2xl border px-4 py-3 font-extrabold transition ${
              active
                ? "border-violet-500 bg-violet-50 text-violet-700"
                : "border-slate-200 hover:border-cyan-400 hover:bg-cyan-50"
            }`}
          >
            {category.label}
          </Link>
        );
      })}
    </>
  );
}

function MobileCategoryLinksFallback({ onNavigate }: { onNavigate: () => void }) {
  return (
    <>
      {categories.map((category) => (
        <Link
          key={category.label}
          href={category.href}
          prefetch={false}
          onClick={onNavigate}
          className="rounded-2xl border border-slate-200 px-4 py-3 font-extrabold transition hover:border-cyan-400 hover:bg-cyan-50"
        >
          {category.label}
        </Link>
      ))}
    </>
  );
}