"use client";

import { useEffect, useRef, useState } from "react";
import Image from "next/image";
import Link from "next/link";
import { usePathname } from "next/navigation";
import { CUSTOMER_PORTAL_URL, ADMIN_DASHBOARD_URL } from "@/lib/meshkee";
import { useMeshkeeSession, isAdminUser } from "@/lib/auth-client";
import styles from "./Header.module.css";

const NAV = [
  { href: "/services", label: "خدمات کلینیک" },
  { href: "/blog", label: "مقالات" },
  { href: "/virtual-tour", label: "تور مجازی" },
  { href: "/about-us", label: "درباره ما" },
  { href: "/contact-us", label: "تماس با ما" },
];

const CLINIC_PHONE_LABEL = "۰۲۵ - ۳۲۹۴۵۰۷۷";
const CLINIC_PHONE_TEL = "tel:+982532945077";

function PhoneIcon() {
  return (
    <svg viewBox="0 0 24 24" width="18" height="18" fill="none" stroke="currentColor" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round">
      <path d="M4 5c0-.6.4-1 1-1h3l2 5-2.5 1.5a12 12 0 0 0 5.5 5.5L16 15l5 2v3c0 .6-.4 1-1 1A17 17 0 0 1 4 5z" />
    </svg>
  );
}

function UserIcon() {
  return (
    <svg viewBox="0 0 24 24" width="20" height="20" fill="none" stroke="currentColor" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round">
      <circle cx="12" cy="8" r="4" />
      <path d="M4 21c0-4.4 3.6-8 8-8s8 3.6 8 8" />
    </svg>
  );
}

function ChevronIcon() {
  return (
    <svg viewBox="0 0 24 24" width="14" height="14" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
      <path d="m6 9 6 6 6-6" />
    </svg>
  );
}

function userDisplayName(user) {
  return (
    user?.firstName ||
    user?.name ||
    user?.fullName ||
    (user?.cellNumber ? user.cellNumber : "کاربر")
  );
}

function AccountMenu() {
  const { status, user, logout } = useMeshkeeSession();
  const [open, setOpen] = useState(false);
  const rootRef = useRef(null);

  useEffect(() => {
    if (!open) return;
    const onDocClick = (e) => {
      if (rootRef.current && !rootRef.current.contains(e.target)) setOpen(false);
    };
    document.addEventListener("mousedown", onDocClick);
    return () => document.removeEventListener("mousedown", onDocClick);
  }, [open]);

  if (status !== "in") {
    // Signed out (or still loading): the icon just sends the shopper to
    // the customer account portal to sign in / register.
    return (
      <a
        className={styles.userBtn}
        href={CUSTOMER_PORTAL_URL}
        aria-label="ورود کاربران"
        title="ورود کاربران"
      >
        <UserIcon />
      </a>
    );
  }

  const admin = isAdminUser(user);

  return (
    <div className={styles.account} ref={rootRef}>
      <button
        type="button"
        className={styles.accountBtn}
        aria-expanded={open}
        onClick={() => setOpen((v) => !v)}
      >
        <span className={styles.accountAvatar}>
          <UserIcon />
        </span>
        <span className={styles.accountName}>{userDisplayName(user)} عزیز</span>
        <ChevronIcon />
      </button>

      {open ? (
        <div className={styles.accountMenu} role="menu">
          <a href={`${CUSTOMER_PORTAL_URL}/profile`} role="menuitem">
            پروفایل من
          </a>
          {admin ? (
            <a href={ADMIN_DASHBOARD_URL} role="menuitem">
              مدیریت وبسایت
            </a>
          ) : null}
          <button type="button" role="menuitem" onClick={logout}>
            خروج
          </button>
        </div>
      ) : null}
    </div>
  );
}

export default function Header() {
  const pathname = usePathname();
  const [open, setOpen] = useState(false);
  const [scrolled, setScrolled] = useState(false);

  useEffect(() => {
    const onScroll = () => setScrolled(window.scrollY > 20);
    onScroll();
    window.addEventListener("scroll", onScroll, { passive: true });
    return () => window.removeEventListener("scroll", onScroll);
  }, []);

  useEffect(() => {
    setOpen(false);
  }, [pathname]);

  return (
    <header className={`${styles.header} ${scrolled ? styles.headerScrolled : ""}`}>
      <div className={`container ${styles.inner}`}>
        <Link href="/" className={styles.brand} aria-label="کلینیک دندانپزشکی نگین">
          <Image
            src="/assets/img/Header/header.png"
            alt="کلینیک دندانپزشکی نگین"
            width={190}
            height={57}
            priority
          />
        </Link>

        <nav className={`${styles.nav} ${open ? styles.navOpen : ""}`}>
          {NAV.map((item) => {
            const active = pathname.startsWith(item.href);
            return (
              <Link
                key={item.href}
                href={item.href}
                className={`${styles.link} ${active ? styles.linkActive : ""}`}
              >
                {item.label}
              </Link>
            );
          })}
        </nav>

        <div className={styles.actions}>
          <a
            className={styles.phone}
            href={CLINIC_PHONE_TEL}
            dir="ltr"
            aria-label={`تماس با کلینیک ${CLINIC_PHONE_LABEL}`}
          >
            <PhoneIcon />
            <span className={styles.phoneNum}>{CLINIC_PHONE_LABEL}</span>
          </a>

          <AccountMenu />

          <button
            type="button"
            className={styles.burger}
            aria-expanded={open}
            aria-label="باز و بسته کردن منو"
            onClick={() => setOpen((v) => !v)}
          >
            <span />
            <span />
            <span />
          </button>
        </div>
      </div>
    </header>
  );
}