"use client";

import Link from "next/link";
import { usePathname } from "next/navigation";
import { useEffect, useState } from "react";
import AccountMenu from "@/components/AccountMenu";
import { useAuth } from "@/components/AuthProvider";
import { businessNavItems } from "@/data/business-nav";
import { en } from "@/lib/i18n/en";
import {
  getAdminDashboardOrigin,
  getCustomerDashboardOrigin,
} from "@/lib/host";
import { customerDashboardHref } from "@/lib/session-handoff";
import { getDisplayName } from "@/lib/userName";
import { getBusinessProfile } from "@/services/meshkee-businesses";
import styles from "./DashboardShell.module.css";

const websiteUrl =
  process.env.NEXT_PUBLIC_WEBSITE_URL?.replace(/\/$/, "") ||
  "http://localhost:3000";

export default function BusinessShell({
  children,
  manageMeshkeeId,
}: {
  children: React.ReactNode;
  /** When set, nav stays on admin host under /manage/[id]/… */
  manageMeshkeeId?: string;
}) {
  const pathname = usePathname();
  const { user, logout, isSuperAdmin, activeBusinessId } = useAuth();
  const [menuOpen, setMenuOpen] = useState(false);
  const [businessName, setBusinessName] = useState("");
  const [businessTitle, setBusinessTitle] = useState("");
  const [logoUrl, setLogoUrl] = useState<string | null>(null);
  const displayName = getDisplayName(user);
  const linkedBusiness =
    user?.businesses.find((item) => item.isOwner) ?? user?.businesses[0];

  const meshkeeId = manageMeshkeeId || activeBusinessId || null;

  const manageBase = manageMeshkeeId
    ? `/manage/${encodeURIComponent(manageMeshkeeId)}`
    : null;

  const publicPath = manageBase
    ? pathname.replace(manageBase, "") || "/profile"
    : pathname.startsWith("/business")
      ? pathname.replace(/^\/business/, "") || "/"
      : pathname;

  useEffect(() => {
    if (!meshkeeId) {
      setBusinessName(linkedBusiness?.name?.trim() || "");
      setBusinessTitle("");
      setLogoUrl(null);
      return;
    }

    let cancelled = false;
    void (async () => {
      try {
        const profile = await getBusinessProfile(meshkeeId);
        if (cancelled) return;
        const name =
          profile.profile.nameEn?.trim() ||
          profile.profile.nameFa?.trim() ||
          linkedBusiness?.name?.trim() ||
          "";
        setBusinessName(name);
        setBusinessTitle(profile.profile.title?.trim() || "");
        setLogoUrl(profile.profile.logoUrl?.trim() || null);
      } catch {
        if (cancelled) return;
        setBusinessName(linkedBusiness?.name?.trim() || "");
        setBusinessTitle("");
        setLogoUrl(null);
      }
    })();

    return () => {
      cancelled = true;
    };
  }, [meshkeeId, linkedBusiness?.name]);

  function navHref(itemHref: string) {
    if (!manageBase) return itemHref;
    return `${manageBase}${itemHref === "/" ? "/profile" : itemHref}`;
  }

  const brandName = businessName || linkedBusiness?.name || "Business";

  return (
    <div className={styles.shell}>
      <aside className={`${styles.sidebar} ${menuOpen ? styles.sidebarOpen : ""}`}>
        <div className={styles.brand}>
          {logoUrl ? (
            <img
              className={styles.brandLogo}
              src={logoUrl}
              alt=""
              width={48}
              height={48}
            />
          ) : null}
          <div className={styles.brandText}>
            <strong className={styles.brandBusiness} dir="auto" title={brandName}>
              {brandName}
            </strong>
            {businessTitle ? (
              <span
                className={styles.brandTitle}
                dir="auto"
                title={businessTitle}
              >
                {businessTitle}
              </span>
            ) : null}
          </div>
        </div>

        <nav className={styles.nav} aria-label="Business">
          {businessNavItems.map((item) => {
            const href = navHref(item.href);
            const active =
              publicPath === item.href ||
              publicPath.startsWith(`${item.href}/`);
            return (
              <Link
                key={item.label}
                href={href}
                className={`${styles.navItem} ${active ? styles.navItemActive : ""}`}
                onClick={() => setMenuOpen(false)}
              >
                <img src={item.icon} alt="" width={18} height={18} />
                <span>{item.label}</span>
              </Link>
            );
          })}
        </nav>

        <div className={styles.sidebarFoot}>
          <p className={styles.userLabel}>{displayName}</p>
          {isSuperAdmin || manageMeshkeeId ? (
            <Link href="/businesses" className={styles.siteLink}>
              Admin dashboard
            </Link>
          ) : (
            <a href={customerDashboardHref("/")} className={styles.siteLink}>
              {en.openCustomerDashboard}
            </a>
          )}
          <a href={websiteUrl} className={styles.siteLink}>
            {en.viewWebsite}
          </a>
          <button
            type="button"
            className={`outline-btn ${styles.logoutBtn}`}
            onClick={() => {
              logout();
              window.location.href =
                isSuperAdmin || manageMeshkeeId
                  ? `${getAdminDashboardOrigin()}/login`
                  : `${getCustomerDashboardOrigin()}/login`;
            }}
          >
            {en.logOut}
          </button>
        </div>
      </aside>

      {menuOpen ? (
        <button
          type="button"
          className={styles.backdrop}
          aria-label="Close menu"
          onClick={() => setMenuOpen(false)}
        />
      ) : null}

      <div className={styles.main}>
        <header className={styles.topbar}>
          <button
            type="button"
            className={styles.menuBtn}
            aria-label="Open menu"
            onClick={() => setMenuOpen(true)}
          >
            <img src="/images/icons/menu.svg" alt="" width={22} height={22} />
          </button>
          <div className={styles.topbarCopy}>
            <p className={styles.eyebrow}>
              {manageMeshkeeId ? "Admin · managing business" : en.workspaceEyebrow}
            </p>
            <p className={styles.topbarHint}>{en.workspaceHint}</p>
          </div>
          <div className={styles.topbarActions}>
            <AccountMenu />
          </div>
        </header>

        <div className={styles.content}>{children}</div>
      </div>
    </div>
  );
}