"use client";

import { useState, useRef, useEffect, type ReactNode } from "react";

interface NavDropdownProps {
  label: string;
  icon?: string;
  children: ReactNode;
}

export function NavDropdown({ label, icon, children }: NavDropdownProps) {
  const [open, setOpen] = useState(false);
  const ref = useRef<HTMLDivElement>(null);

  useEffect(() => {
    function handleClick(e: MouseEvent) {
      if (ref.current && !ref.current.contains(e.target as Node)) setOpen(false);
    }
    function handleKey(e: KeyboardEvent) {
      if (e.key === "Escape") setOpen(false);
    }
    if (open) {
      document.addEventListener("mousedown", handleClick);
      document.addEventListener("keydown", handleKey);
    }
    return () => {
      document.removeEventListener("mousedown", handleClick);
      document.removeEventListener("keydown", handleKey);
    };
  }, [open]);

  return (
    <div ref={ref} className="relative group md:flex">
      <button
        type="button"
        onClick={() => setOpen(!open)}
        onKeyDown={(e) => { if (e.key === "Enter" || e.key === " ") setOpen(!open); }}
        className="nav-item cursor-pointer"
        aria-expanded={open}
        aria-haspopup="true"
      >
        {icon ? <img src={icon} alt="" className="w-5 h-5 mr-1.5" /> : null}
        {label}
        <svg className={`ml-auto md:ml-1 w-3 h-3 transition-transform duration-200 ${open ? "rotate-180" : ""}`} fill="none" stroke="currentColor" viewBox="0 0 24 24"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" /></svg>
      </button>
      {open && (
        <div className="dropdown-menu md:absolute left-0 top-full mt-0.5 min-w-[200px] rounded-xl z-50 py-2" role="menu" onClick={() => setOpen(false)}>
          {children}
        </div>
      )}
    </div>
  );
}