"use client";

import { useState, useEffect } from "react";
import Link from "next/link";
import { ShoppingBag, Menu, Phone, Wrench } from "lucide-react";
import { NavDropdown } from "./NavDropdown";
import { MobileMenu } from "./MobileMenu";
import { useCartStore } from "@/lib/cart-store";
import { companyDetails } from "@/content/company";
import { cn } from "@/lib/utils";
import { buttonClasses } from '@/components/ui/Button';


export function Header() {
  const [isScrolled, setIsScrolled] = useState(false);
  const [isMobileMenuOpen, setIsMobileMenuOpen] = useState(false);
  const [mounted, setMounted] = useState(false);

  const cartItems = useCartStore((state) => state.items);

  useEffect(() => {
    const t = setTimeout(() => setMounted(true), 0);
    const handleScroll = () => {
      if (window.scrollY > 40) {
        setIsScrolled(true);
      } else {
        setIsScrolled(false);
      }
    };

    window.addEventListener("scroll", handleScroll);
    return () => {
      window.removeEventListener("scroll", handleScroll);
      clearTimeout(t);
    };
  }, []);

  const cartCount = mounted
    ? cartItems.reduce((total, item) => total + item.quantity, 0)
    : 0;

  const acSections = [
    {
      title: "Klimatyzatory",
      items: [
        {
          label: "Ścienne split",
          href: "/sklep?category=scienne",
          description: "Klasyczne jednostki ścienne do mieszkań",
        },
        {
          label: "Multisplit",
          href: "/sklep?category=multisplit",
          description: "Systemy wielopokojowe (2-5 pomieszczeń)",
        },
        /* {
          label: "Kasetonowe i konsolowe",
          href: "/sklep?category=kasetonowe",
          description: "Modele biurowe i przypodłogowe",
        }, */
      ],
    },
    {
      title: "Usługi HVAC",
      items: [
        {
          label: "Montaż klimatyzacji",
          href: "/montaz-klimatyzacji",
          description: "Kompleksowy dobór, audyt i montaż",
        },
        {
          label: "Serwis i czyszczenie",
          href: "/serwis-klimatyzacji",
          description: "Odgrzybianie, naprawy i przeglądy",
        },
        {
          label: "Cennik montażu",
          href: "/cennik-montazu",
          description: "Przejrzyste ceny — split, multisplit, bruzda",
        },

      ],
    },
  ];

  return (
    <>
      <header
        className={cn(
          "hidden lg:block sticky top-0 z-40 bg-background transition-all duration-300 border-b border-border",
          isScrolled ? "shadow-md py-2" : "py-4"
        )}
      >
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 flex items-center justify-between gap-4">
          <Link href="/" className="shrink-0 flex items-center gap-3">
            <span className="text-2xl font-bold font-heading text-primary">
              {companyDetails.shortName}
              <span className="text-accent">.</span>
            </span>
          </Link>
          <nav className="flex items-center gap-6">
            <NavDropdown
              label="Klimatyzacja"
              triggerHref="/klimatyzacja"
              sections={acSections}
              align="left"
            />

            <NavDropdown
              label="Sklep"
              triggerHref="/sklep"
              sections={[
                {
                  title: "Kategorie produktów",
                  items: [
                    { label: "Klimatyzatory ścienne", href: "/sklep?category=scienne", description: "Jednostki do domu i biura" },
                    { label: "Klimatyzatory multisplit", href: "/sklep?category=multisplit", description: "Systemy na kilka pomieszczeń" },
                  ]
                }
              ]}
              align="left"
            />
            <Link
              href="/kalkulator"
              className="text-sm font-medium text-primary hover:text-accent transition-colors"
            >
              Dobór urządzenia
            </Link>

            <Link
              href="/blog"
              className="text-sm font-medium text-primary hover:text-accent transition-colors"
            >
              Blog
            </Link>
            <Link
              href="/kontakt"
              className="text-sm font-medium text-primary hover:text-accent transition-colors"
            >
              Kontakt
            </Link>
          </nav>
          <div className="flex items-center gap-5">
            <a
              href={`tel:${companyDetails.phoneRaw}`}
              className="hidden xl:flex items-center gap-2 text-sm font-semibold text-primary hover:text-accent transition-colors whitespace-nowrap"
            >
              <Phone className="size-4 text-accent" />
              <span>{companyDetails.phone}</span>
            </a>

            <div className="flex items-center gap-1">
              <Link href="/koszyk" className="p-2 text-primary hover:text-accent hover:bg-muted rounded-lg transition-colors relative outline-none" aria-label="Koszyk">
                <ShoppingBag className="size-5" />
                {cartCount > 0 && (
                  <span className="absolute top-0 right-0 bg-accent text-white text-[10px] font-bold size-4 rounded-full flex items-center justify-center translate-x-0.5 -translate-y-0.5">
                    {cartCount}
                  </span>
                )}
              </Link>
            </div>

            <Link href="/kontakt" className={buttonClasses({ variant: 'primary', size: 'sm' })}>
              Darmowa wycena
            </Link>
          </div>
        </div>
      </header>
      <header
        className={cn(
          "lg:hidden sticky top-0 z-40 bg-background border-b border-border transition-all duration-300",
          isScrolled ? "shadow-md py-3" : "py-4"
        )}
      >
        <div className="max-w-7xl mx-auto px-4 sm:px-6 flex items-center justify-between">
          <Link href="/" className="shrink-0 flex items-center">
            <span className="text-xl font-bold font-heading text-primary">
              {companyDetails.shortName}
              <span className="text-accent">.</span>
            </span>
          </Link>
          <div className="flex items-center gap-3">
            <Link href="/koszyk" className="p-2 text-primary hover:text-accent hover:bg-muted transition-colors rounded-lg relative outline-none" aria-label="Koszyk">
              <ShoppingBag className="size-5" />
              {cartCount > 0 && (
                <span className="absolute top-0 right-0 bg-accent text-white text-[10px] font-bold size-4 rounded-full flex items-center justify-center translate-x-0.5 -translate-y-0.5">
                  {cartCount}
                </span>
              )}
            </Link>

            <button
              onClick={() => setIsMobileMenuOpen(true)}
              className="p-2 text-primary hover:text-accent hover:bg-muted transition-colors rounded-lg outline-none"
              aria-label="Otwórz menu"
            >
              <Menu className="size-6" />
            </button>
          </div>
        </div>
      </header>
      <MobileMenu
        isOpen={isMobileMenuOpen}
        onClose={() => setIsMobileMenuOpen(false)}
      />
    </>
  );
}