"use client";

import { useEffect, useRef, useState, type MouseEvent } from "react";
import { businessDashboardUrl, customerDashboardUrl } from "@/lib/customer";
import { useSession } from "@/lib/session";
import { IconChevron, IconUser } from "./Icons";

const itemClass =
  "block w-full px-3 py-2.5 text-right text-sm text-ink transition-colors hover:bg-brand-soft hover:text-brand";

export function AccountMenu({
  displayName,
  isWebsiteAdmin,
  onLogout,
  compact = false,
}: {
  displayName: string;
  isWebsiteAdmin: boolean;
  onLogout: () => void;
  compact?: boolean;
}) {
  const [open, setOpen] = useState(false);
  const [handoffBusy, setHandoffBusy] = useState(false);
  const menuRef = useRef<HTMLDivElement>(null);
  const { getAccessToken } = useSession();

  useEffect(() => {
    if (!open) return;
    const onClickOutside = (event: Event) => {
      if (menuRef.current && event.target instanceof Node && !menuRef.current.contains(event.target)) {
        setOpen(false);
      }
    };
    const onKeyDown = (event: KeyboardEvent) => {
      if (event.key === "Escape") setOpen(false);
    };
    document.addEventListener("mousedown", onClickOutside);
    document.addEventListener("keydown", onKeyDown);
    return () => {
      document.removeEventListener("mousedown", onClickOutside);
      document.removeEventListener("keydown", onKeyDown);
    };
  }, [open]);

  async function openBusinessDashboard(event: MouseEvent<HTMLAnchorElement>) {
    if (event.metaKey || event.ctrlKey || event.shiftKey || event.altKey || event.button !== 0) {
      return;
    }
    event.preventDefault();
    if (handoffBusy) return;

    const baseUrl = businessDashboardUrl();
    const popup = window.open("about:blank", "_blank");
    setHandoffBusy(true);
    try {
      const token = getAccessToken();
      const res = await fetch("/api/auth/handoff", {
        method: "POST",
        headers: token ? { Authorization: `Bearer ${token}` } : undefined,
      });
      if (!res.ok) throw new Error("handoff failed");
      const data = (await res.json()) as { ticket?: string };
      const url = new URL(baseUrl);
      if (data.ticket) url.searchParams.set("handoff", data.ticket);
      if (popup) {
        popup.opener = null;
        popup.location.replace(url.toString());
      } else {
        window.open(url.toString(), "_blank", "noopener,noreferrer");
      }
    } catch {
      if (popup) popup.location.replace(baseUrl);
      else window.open(baseUrl, "_blank", "noopener,noreferrer");
    } finally {
      setHandoffBusy(false);
      setOpen(false);
    }
  }

  return (
    <div ref={menuRef} className="relative">
      <button
        type="button"
        onClick={() => setOpen((value) => !value)}
        aria-expanded={open}
        aria-haspopup="menu"
        className={`flex max-w-[12rem] items-center gap-2 rounded-full px-3 py-2 text-sm hover:bg-zinc-100 ${
          compact ? "w-full justify-between px-0 hover:bg-transparent" : ""
        }`}
      >
        <span className="flex min-w-0 items-center gap-2">
          <IconUser />
          <span className="truncate font-medium">
            {displayName} عزیز
          </span>
        </span>
        <IconChevron className={`w-3.5 h-3.5 shrink-0 transition-transform ${open ? "rotate-90" : "-rotate-90"}`} />
      </button>

      {open && (
        <div
          role="menu"
          className={`absolute z-50 mt-2 min-w-[11rem] overflow-hidden rounded-2xl border border-black/5 bg-white py-1 shadow-xl ${
            compact ? "start-0 end-0" : "start-0"
          }`}
        >
          <a role="menuitem" href={customerDashboardUrl("/profile")} className={itemClass} onClick={() => setOpen(false)}>
            پروفایل من
          </a>
          <a role="menuitem" href={customerDashboardUrl("/orders")} className={itemClass} onClick={() => setOpen(false)}>
            سفارشات من
          </a>
          {isWebsiteAdmin && (
            <a
              role="menuitem"
              href={businessDashboardUrl()}
              className={itemClass}
              onClick={openBusinessDashboard}
            >
              {handoffBusy ? "در حال انتقال…" : "مدیریت وبسایت"}
            </a>
          )}
          <button
            type="button"
            role="menuitem"
            className={`${itemClass} text-brand hover:text-[#e51f1f]`}
            onClick={() => {
              setOpen(false);
              onLogout();
            }}
          >
            خروج
          </button>
        </div>
      )}
    </div>
  );
}