"use client";

import Link from "next/link";
import { usePathname, useRouter } from "next/navigation";
import {
  Bell,
  BriefcaseBusiness,
  CalendarDays,
  Grid2X2,
  Home,
  Menu,
  MessageSquare,
  Newspaper,
  Puzzle,
  Search,
  Sparkles,
  Users,
  UsersRound,
} from "lucide-react";
import { useState } from "react";
import { Brand } from "./Brand";
import { Avatar } from "./Avatar";
import { useCurrentUser } from "@/lib/client-session";

const nav = [
  { href: "/feed", label: "Home", icon: Home },
  { href: "/my-network", label: "My Network", icon: Users },
  { href: "/jobs", label: "Jobs", icon: BriefcaseBusiness },
  { href: "/messages", label: "Messaging", icon: MessageSquare },
  { href: "/notifications", label: "Notifications", icon: Bell },
];

export function AppShell({ children }: { children: React.ReactNode }) {
  const pathname = usePathname();
  const router = useRouter();
  const currentUser = useCurrentUser();
  const [moreOpen, setMoreOpen] = useState(false);

  function submitSearch(event: React.FormEvent<HTMLFormElement>) {
    event.preventDefault();
    const data = new FormData(event.currentTarget);
    const query = String(data.get("q") ?? "").trim();
    router.push(query ? `/search?q=${encodeURIComponent(query)}` : "/search");
  }

  return (
    <div className="app-frame">
      <header className="topbar">
        <div className="topbar-inner">
          <Brand compact />
          <form className="global-search" onSubmit={submitSearch}>
            <Search size={17} aria-hidden="true" />
            <input name="q" aria-label="Search LinkedIn" placeholder="Search" />
          </form>
          <nav className="primary-nav" aria-label="Primary navigation">
            {nav.map((item) => {
              const active = pathname === item.href || pathname.startsWith(`${item.href}/`);
              const Icon = item.icon;
              return (
                <Link prefetch={false} key={item.href} href={item.href} className={`nav-item ${active ? "active" : ""}`}>
                  <Icon size={21} strokeWidth={active ? 2.2 : 1.8} />
                  <span>{item.label}</span>
                  {item.label === "Notifications" && <b className="nav-badge">3</b>}
                </Link>
              );
            })}
            <Link prefetch={false} href={`/profile/${currentUser.username}`} className={`nav-item ${pathname.startsWith("/profile") ? "active" : ""}`}>
              <Avatar name={currentUser.name} src={currentUser.avatarUrl ?? undefined} size="sm" />
              <span>Me</span>
            </Link>
            <span className="more-menu">
              <button className={`nav-item ${moreOpen ? "active" : ""}`} aria-expanded={moreOpen} aria-haspopup="menu" onClick={() => setMoreOpen((open) => !open)} type="button">
                <Menu size={21} />
                <span>More</span>
              </button>
              {moreOpen && <span className="more-menu-popover" role="menu">
                <Link prefetch={false} href="/games" onClick={() => setMoreOpen(false)}><Puzzle size={19} /><span><b>Puzzle games</b><small>Play today&apos;s challenges</small></span></Link>
                <Link prefetch={false} href="/directory/groups" onClick={() => setMoreOpen(false)}><UsersRound size={19} /><span><b>Groups</b><small>Find professional communities</small></span></Link>
                <Link prefetch={false} href="/directory/events" onClick={() => setMoreOpen(false)}><CalendarDays size={19} /><span><b>Events</b><small>Discover upcoming sessions</small></span></Link>
                <Link prefetch={false} href="/directory/newsletters" onClick={() => setMoreOpen(false)}><Newspaper size={19} /><span><b>Newsletters</b><small>Follow expert updates</small></span></Link>
              </span>}
            </span>
            <Link prefetch={false} href="/premium" className={`nav-item work-menu ${pathname.startsWith("/premium") ? "active" : ""}`} title="LinkedIn Premium">
              <span className="work-menu-icons"><Grid2X2 size={18} /><Sparkles size={12} /></span>
              <span>Premium</span>
            </Link>
          </nav>
        </div>
      </header>
      <main className="app-main">{children}</main>
      <nav className="mobile-nav" aria-label="Mobile navigation">
        {nav.map((item) => {
          const Icon = item.icon;
          return <Link prefetch={false} key={item.href} href={item.href}><Icon size={21} /><span>{item.label === "My Network" ? "Network" : item.label}</span></Link>;
        })}
      </nav>
    </div>
  );
}