"use client";

import { useEffect, useState } from "react";
import { createPortal } from "react-dom";
import Link from "next/link";
import { usePathname } from "next/navigation";
import { Menu, X, ChevronDown, Phone, ArrowRight } from "lucide-react";
import type { NavItem } from "@/lib/nav";

type NavService = { slug: string; title: string };

export function MobileMenu({
  navItems,
  services,
  phone,
  phoneRaw,
}: {
  navItems: NavItem[];
  services: NavService[];
  phone: string;
  phoneRaw: string;
}) {
  const [mounted, setMounted] = useState(false);
  const [open, setOpen] = useState(false);
  const [servicesOpen, setServicesOpen] = useState(false);
  const pathname = usePathname();

  useEffect(() => setMounted(true), []);

  // Rota değişince menüyü kapat
  useEffect(() => {
    setOpen(false);
  }, [pathname]);

  // Açıkken arka plan kaydırmasını kilitle
  useEffect(() => {
    document.body.style.overflow = open ? "hidden" : "";
    return () => {
      document.body.style.overflow = "";
    };
  }, [open]);

  // Drawer + overlay — header transform bağlamından kaçmak için body'ye portal
  const overlay = (
    <div
      className={`fixed inset-0 z-[100] lg:hidden ${
        open ? "" : "pointer-events-none"
      }`}
      aria-hidden={!open}
    >
      {/* Koyu overlay */}
      <div
        onClick={() => setOpen(false)}
        className={`absolute inset-0 bg-black/50 transition-opacity duration-300 ${
          open ? "opacity-100" : "opacity-0"
        }`}
      />

      {/* Sağ drawer — beyaz panel */}
      <div
        role="dialog"
        aria-modal="true"
        className={`absolute right-0 top-0 flex h-full w-[82%] max-w-[340px] flex-col bg-white shadow-2xl transition-transform duration-300 ease-out ${
          open ? "translate-x-0" : "translate-x-full"
        }`}
      >
        {/* Üst bar */}
        <div className="flex h-14 items-center justify-between border-b border-gray-100 px-5">
          <span className="text-sm font-semibold tracking-tight text-[var(--navy)]">
            Menü
          </span>
          <button
            type="button"
            onClick={() => setOpen(false)}
            aria-label="Menüyü kapat"
            className="-mr-2 inline-flex size-9 items-center justify-center rounded-lg text-gray-600 transition-colors hover:bg-gray-100 hover:text-[var(--navy)]"
          >
            <X className="size-5" />
          </button>
        </div>

        {/* Linkler — sıra admin'den yönetilir */}
        <nav className="flex-1 overflow-y-auto px-3 py-4">
          {navItems
            .filter((item) => item.visible)
            .map((item) =>
              item.mega ? (
                <div key={item.key}>
                  {/* Hizmetler — açılır */}
                  <button
                    type="button"
                    onClick={() => setServicesOpen((v) => !v)}
                    aria-expanded={servicesOpen}
                    className="flex w-full items-center justify-between rounded-xl px-4 py-3 text-base font-medium text-gray-800 transition-colors hover:bg-blue-50 hover:text-[var(--navy)]"
                  >
                    {item.label}
                    <ChevronDown
                      className={`size-4 transition-transform duration-200 ${
                        servicesOpen ? "rotate-180" : ""
                      }`}
                    />
                  </button>
                  {servicesOpen && (
                    <div className="mb-1 ml-3 border-l border-gray-100 pl-3">
                      {services.map((s) => (
                        <Link
                          key={s.slug}
                          href={`/hizmetler/${s.slug}`}
                          className="block rounded-lg px-3 py-2 text-sm text-gray-600 transition-colors hover:bg-blue-50 hover:text-[var(--navy)]"
                        >
                          {s.title}
                        </Link>
                      ))}
                      <Link
                        href="/hizmetler"
                        className="block rounded-lg px-3 py-2 text-sm font-semibold text-[var(--sky-600)] hover:text-[var(--navy)]"
                      >
                        Tüm hizmetleri gör →
                      </Link>
                    </div>
                  )}
                </div>
              ) : (
                <Link
                  key={item.key}
                  href={item.href}
                  className="block rounded-xl px-4 py-3 text-base font-medium text-gray-800 transition-colors hover:bg-blue-50 hover:text-[var(--navy)]"
                >
                  {item.label}
                </Link>
              ),
            )}
        </nav>

        {/* Alt CTA */}
        <div className="space-y-2 border-t border-gray-100 p-4">
          <a
            href={`tel:${phoneRaw}`}
            className="flex items-center justify-center gap-2 rounded-xl border border-gray-200 px-4 py-3 text-sm font-semibold text-[var(--navy)] transition-colors hover:border-[var(--navy)]"
          >
            <Phone className="size-4" />
            {phone}
          </a>
          <Link
            href="/iletisim"
            className="flex items-center justify-center gap-2 rounded-xl bg-[var(--navy)] px-4 py-3 text-sm font-semibold text-white transition-colors hover:bg-[var(--navy-700)]"
          >
            Ücretsiz Teklif
            <ArrowRight className="size-4" />
          </Link>
        </div>
      </div>
    </div>
  );

  return (
    <div className="lg:hidden">
      <button
        type="button"
        onClick={() => setOpen(true)}
        aria-label="Menüyü aç"
        aria-expanded={open}
        className="inline-flex size-9 items-center justify-center rounded-lg text-gray-700 transition-colors hover:bg-gray-100 hover:text-[var(--navy)]"
      >
        <Menu className="size-5" />
      </button>

      {mounted && createPortal(overlay, document.body)}
    </div>
  );
}