"use client";

import React, { useEffect, useState } from "react";
import { useRouter, usePathname } from "next/navigation";
import Link from "next/link";
import { 
  LayoutDashboard, 
  Users, 
  Clock, 
  FileSpreadsheet, 
  Settings, 
  Monitor, 
  LogOut, 
  Menu, 
  X,
  ChevronRight,
  Scan,
  History,
  Sun,
  Moon,
  Building2,
  MessageSquare,
  User,
  TrendingUp,
  Calendar,
  FileText,
  Shield,
  Bell,
  BellRing,
  HelpCircle
} from "lucide-react";
import { getAccessToken, getUserProfile, clearTokens, fetchApi } from "@/app/utils/api";
import CommandPalette from "@/components/CommandPalette";

function NavLink({ 
  item, 
  isActive, 
  isCollapsed, 
  onClick 
}: { 
  item: { name: string; href: string; icon: any }, 
  isActive: boolean, 
  isCollapsed: boolean, 
  onClick?: () => void 
}) {
  const Icon = item.icon;
  return (
    <Link
      href={item.href}
      onClick={onClick}
      data-tooltip={isCollapsed ? item.name : undefined}
      className={`group relative flex items-center ${isCollapsed ? "justify-center px-2" : "gap-2.5 px-2.5 mx-1"} py-2.5 rounded-xl transition-all duration-200 ${
        isActive
          ? "bg-zinc-950 text-white dark:bg-zinc-100 dark:text-zinc-950 font-bold"
          : "text-[var(--text-secondary)] hover:text-[var(--text-primary)] hover:bg-[var(--border-subtle)]"
      }`}
    >
      <div className={`w-7.5 h-7.5 rounded-lg flex items-center justify-center shrink-0 transition-all ${
        isActive
          ? "bg-zinc-800 text-white dark:bg-zinc-200 dark:text-zinc-900"
          : "bg-[var(--border-subtle)] text-[var(--text-muted)] group-hover:bg-[var(--border-strong)] group-hover:text-[var(--text-secondary)]"
      }`}>
        <Icon className="w-4 h-4" />
      </div>
      
      {!isCollapsed && (
        <div className="flex-1 min-w-0">
          <p className="text-sm">
            {item.name}
          </p>
        </div>
      )}
    </Link>
  );
}

export default function SidebarLayout({ children }: { children: React.ReactNode }) {
  const router = useRouter();
  const pathname = usePathname();
  const [sidebarOpen, setSidebarOpen] = useState(false);
  const [isCollapsed, setIsCollapsed] = useState(false);
  const [user, setUser] = useState<any>(null);
  const [authorized, setAuthorized] = useState(false);
  const [notifications, setNotifications] = useState<any[]>([]);
  const [showNotifications, setShowNotifications] = useState(false);
  const [showExitConfirm, setShowExitConfirm] = useState(false);
  const [appClosed, setAppClosed] = useState(false);

  useEffect(() => {
    if (typeof window === "undefined" || pathname !== "/dashboard") return;

    // Push dummy state to capture back button
    window.history.pushState(null, "", window.location.href);

    const handlePopState = () => {
      // Re-push to prevent browser from leaving
      window.history.pushState(null, "", window.location.href);
      setShowExitConfirm(true);
    };

    window.addEventListener("popstate", handlePopState);
    return () => {
      window.removeEventListener("popstate", handlePopState);
    };
  }, [pathname]);

  function playNotificationSound() {
    if (typeof window !== "undefined") {
      try {
        const AudioContextClass = window.AudioContext || (window as any).webkitAudioContext;
        const audioCtx = new AudioContextClass();
        if (audioCtx.state === "suspended") audioCtx.resume();
        const now = audioCtx.currentTime;
        
        // Double chime
        const osc1 = audioCtx.createOscillator();
        const gain1 = audioCtx.createGain();
        osc1.type = "sine";
        osc1.frequency.setValueAtTime(587.33, now); // D5
        gain1.gain.setValueAtTime(0, now);
        gain1.gain.linearRampToValueAtTime(0.15, now + 0.05);
        gain1.gain.exponentialRampToValueAtTime(0.001, now + 0.3);
        osc1.connect(gain1);
        gain1.connect(audioCtx.destination);
        osc1.start(now);
        osc1.stop(now + 0.35);

        const osc2 = audioCtx.createOscillator();
        const gain2 = audioCtx.createGain();
        osc2.type = "sine";
        osc2.frequency.setValueAtTime(880, now + 0.1); // A5
        gain2.gain.setValueAtTime(0, now + 0.1);
        gain2.gain.linearRampToValueAtTime(0.15, now + 0.15);
        gain2.gain.exponentialRampToValueAtTime(0.001, now + 0.45);
        osc2.connect(gain2);
        gain2.connect(audioCtx.destination);
        osc2.start(now + 0.1);
        osc2.stop(now + 0.5);
      } catch (e) {
        console.error("Audio Context playback failed", e);
      }
    }
  }

  const fetchNotifications = async () => {
    try {
      const res = await fetchApi("/notifications");
      if (Array.isArray(res)) {
        setNotifications(prev => {
          // Play sound ONLY if there is a NEW unread notification compared to what we currently have
          const hasNewUnread = res.some(newN => !newN.is_read && !prev.some(oldN => oldN.id === newN.id));
          if (hasNewUnread && prev.length > 0) {
            playNotificationSound();
          }
          return res;
        });
      }
    } catch (e) {
      console.error("Failed to fetch notifications", e);
    }
  };

  // Helper to convert base64 VAPID key to Uint8Array
  function urlB64ToUint8Array(base64String: string) {
    const padding = '='.repeat((4 - base64String.length % 4) % 4);
    const base64 = (base64String + padding)
      .replace(/\-/g, '+')
      .replace(/_/g, '/');

    const rawData = window.atob(base64);
    const outputArray = new Uint8Array(rawData.length);

    for (let i = 0; i < rawData.length; ++i) {
      outputArray[i] = rawData.charCodeAt(i);
    }
    return outputArray;
  }

  const registerPushSubscription = async () => {
    if (!('serviceWorker' in navigator) || !('PushManager' in window)) {
      console.warn("Push notifications are not supported in this browser.");
      return;
    }

    try {
      const res = await fetchApi("/push/vapid-public-key");
      if (!res || !res.publicKey) return;

      const registration = await navigator.serviceWorker.ready;
      const subscription = await registration.pushManager.subscribe({
        userVisibleOnly: true,
        applicationServerKey: urlB64ToUint8Array(res.publicKey)
      });

      await fetchApi("/push/subscribe", {
        method: "POST",
        body: JSON.stringify({ subscription })
      });
      console.info("PWA push subscription registered successfully.");
    } catch (err) {
      console.error("Failed to register PWA push subscription:", err);
    }
  };

  // Register Service Worker for PWA
  useEffect(() => {
    if ('serviceWorker' in navigator) {
      navigator.serviceWorker.register('/sw.js')
        .then((reg) => {
          console.info('Service Worker registered scope:', reg.scope);
        })
        .catch((err) => {
          console.error('Service worker registration failed:', err);
        });
    }
  }, []);

  // Request location permission on startup/login
  const requestLocationPermission = () => {
    if (typeof window !== "undefined" && 'geolocation' in navigator) {
      navigator.geolocation.getCurrentPosition(
        (pos) => {
          console.info("Location permission granted on startup:", pos.coords.latitude, pos.coords.longitude);
        },
        (err) => {
          console.warn("Location permission denied on startup:", err.message);
        },
        { enableHighAccuracy: true, timeout: 5000, maximumAge: 0 }
      );
    }
  };

  useEffect(() => {
    if (authorized) {
      fetchNotifications();
      const interval = setInterval(fetchNotifications, 10000); // Poll every 10 seconds
      
      // Request notification permission and register subscription
      if (typeof window !== "undefined" && 'Notification' in window) {
        if (Notification.permission === 'default') {
          Notification.requestPermission().then(permission => {
            if (permission === 'granted') {
              registerPushSubscription();
            }
          });
        } else if (Notification.permission === 'granted') {
          registerPushSubscription();
        }
      }

      // Request location permission
      requestLocationPermission();

      return () => clearInterval(interval);
    }
  }, [authorized]);

  const markAsRead = async (id: number) => {
    try {
      await fetchApi(`/notifications/${id}/read`, { method: "PUT" });
      fetchNotifications();
    } catch (e) {
      console.error(e);
    }
  };

  const markAllAsRead = async () => {
    try {
      const unread = notifications.filter(n => !n.is_read);
      await Promise.all(unread.map(n => fetchApi(`/notifications/${n.id}/read`, { method: "PUT" })));
      fetchNotifications();
    } catch (e) {
      console.error(e);
    }
  };

  const [theme, setTheme] = useState<"light" | "dark">("light");

  const [currentTime, setCurrentTime] = useState("");
  const [currentDate, setCurrentDate] = useState("");

  useEffect(() => {
    const updateTime = () => {
      const now = new Date();
      setCurrentTime(now.toLocaleTimeString([], { hour: '2-digit', minute: '2-digit', second: '2-digit' }));
      setCurrentDate(now.toLocaleDateString([], { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' }));
    };
    updateTime();
    const interval = setInterval(updateTime, 1000);
    return () => clearInterval(interval);
  }, []);

  // Load theme and sidebar state from localStorage on client side
  useEffect(() => {
    const saved = localStorage.getItem("sidebar_collapsed");
    if (saved === "true") {
      setIsCollapsed(true);
    }

    const savedTheme = localStorage.getItem("theme");
    const systemPrefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
    const initialTheme = (savedTheme as "light" | "dark") || (systemPrefersDark ? "dark" : "light");
    
    setTheme(initialTheme);
    if (initialTheme === "dark") {
      document.documentElement.classList.add("dark");
    } else {
      document.documentElement.classList.remove("dark");
    }
  }, []);

  const toggleTheme = () => {
    const nextTheme = theme === "dark" ? "light" : "dark";
    setTheme(nextTheme);
    localStorage.setItem("theme", nextTheme);
    if (nextTheme === "dark") {
      document.documentElement.classList.add("dark");
    } else {
      document.documentElement.classList.remove("dark");
    }
  };

  const toggleCollapse = () => {
    const nextVal = !isCollapsed;
    setIsCollapsed(nextVal);
    localStorage.setItem("sidebar_collapsed", String(nextVal));
  };

  useEffect(() => {
    const token = getAccessToken();
    const profile = getUserProfile();
    
    if (!token || !profile) {
      clearTokens();
      router.push("/");
    } else {
      setUser(profile);
      setAuthorized(true);
      
       // Auto-redirect employees to dashboard if they attempt to access any admin views
      if (profile?.role?.name === "Employee" && pathname !== "/dashboard" && pathname !== "/tickets" && pathname !== "/profile" && pathname !== "/calendar") {
        router.push("/dashboard");
      } else if (profile?.role?.name !== "Super Admin" && (pathname === "/tenants" || pathname === "/users" || pathname === "/analytics")) {
        router.push("/dashboard");
      }
    }
  }, [router, pathname]);

  const [currentQuery, setCurrentQuery] = useState("");
  useEffect(() => {
    if (typeof window !== "undefined") {
      const handleUpdate = () => {
        setCurrentQuery(window.location.search);
      };
      handleUpdate();
      const interval = setInterval(handleUpdate, 200);
      return () => clearInterval(interval);
    }
  }, []);

  const isLinkActive = (href: string) => {
    if (href.includes("?")) {
      const [linkPath, linkSearch] = href.split("?");
      if (pathname !== linkPath) return false;
      const linkParams = new URLSearchParams(linkSearch);
      const currentParams = new URLSearchParams(currentQuery);
      return linkParams.get("tab") === currentParams.get("tab");
    } else {
      if (href === "/dashboard") {
        const currentParams = new URLSearchParams(currentQuery);
        if (currentParams.has("tab")) return false;
        return pathname === "/dashboard";
      }
      return pathname === href || pathname.startsWith(href + "/");
    }
  };

  if (!authorized) {
    return (
      <div className="min-h-screen bg-[var(--bg-base)] flex items-center justify-center">
        <div className="flex flex-col items-center gap-4">
          <div className="relative w-12 h-12">
            <div className="absolute inset-0 rounded-full border-2 border-[var(--border-subtle)]" />
            <div className="absolute inset-0 rounded-full border-2 border-[var(--text-primary)] border-t-transparent animate-spin" />
          </div>
          <p className="text-[var(--text-secondary)] text-sm font-mono">Authenticating...</p>
        </div>
      </div>
    );
  }

  const handleLogout = () => {
    clearTokens();
    router.push("/");
  };

  const initials = user?.email ? user.email[0].toUpperCase() : "A";
  const isEmployee = user?.role?.name === "Employee";
  const isSuperAdmin = user?.role?.name === "Super Admin";

  const getVisibleNavItems = () => {
    const role = user?.role?.name;
    if (role === "Super Admin") {
      return [
        { name: "Dashboard",       href: "/dashboard",  icon: LayoutDashboard },
        { name: "Organizations",   href: "/tenants",    icon: Building2 },
        { name: "Analytics",       href: "/analytics",  icon: TrendingUp },
        { name: "Helpdesk",        href: "/tickets",    icon: MessageSquare },
        { name: "Audit Logs",      href: "/audit",      icon: History },
        { name: "Settings",        href: "/settings",   icon: Settings },
        { name: "Kiosk Mode",      href: "/kiosk",      icon: Scan },
      ];
    } else if (role === "Admin") {
      return [
        { name: "Dashboard",       href: "/dashboard",  icon: LayoutDashboard },
        { name: "Attendance",      href: "/attendance", icon: Clock },
        { name: "Employees",       href: "/employees",  icon: Users },
        { name: "Leave",           href: "/leaves",     icon: Calendar },
        { name: "Helpdesk",        href: "/tickets",    icon: MessageSquare },
        { name: "Reports",         href: "/reports",    icon: FileSpreadsheet },
        { name: "Settings",        href: "/settings",   icon: Settings },
        { name: "Kiosk Mode",      href: "/kiosk",      icon: Scan },
      ];
    } else if (role === "HR") {
      return [
        { name: "Dashboard",       href: "/dashboard",  icon: LayoutDashboard },
        { name: "Attendance",      href: "/attendance", icon: Clock },
        { name: "Employees",       href: "/employees",  icon: Users },
        { name: "Leave",           href: "/leaves",     icon: Calendar },
        { name: "Helpdesk",        href: "/tickets",    icon: MessageSquare },
        { name: "Reports",         href: "/reports",    icon: FileSpreadsheet },
        { name: "Kiosk Mode",      href: "/kiosk",      icon: Scan },
      ];
    } else {
      return [
        { name: "Dashboard",       href: "/dashboard",  icon: LayoutDashboard },
        { name: "Attendance",      href: "/dashboard?tab=attendance", icon: Clock },
        { name: "Leave",           href: "/dashboard?tab=leave",      icon: Calendar },
        { name: "Calendar",        href: "/calendar",                 icon: Calendar },
        { name: "Contact HR",      href: "/tickets",                  icon: MessageSquare },
      ];
    }
  };

  const visibleNavItems = getVisibleNavItems();

  return (
    <div className="h-screen overflow-hidden flex bg-[var(--bg-base)] text-[var(--text-primary)] font-sans relative">
      <CommandPalette />
      {/* Ambient background */}
      <div className="ambient-bg" />

      {/* ─── Desktop Sidebar ─── */}
      <aside className={`hidden md:flex flex-col ${isCollapsed ? "w-20" : "w-60"} shrink-0 border-r border-[var(--border-subtle)] relative z-10 transition-all duration-200`}>
        {/* Sidebar inner background */}
        <div className="absolute inset-0 bg-[var(--bg-surface)]/95 backdrop-blur-xl" />
        
        <div className="relative flex flex-col h-full p-4">
          {/* Logo & Toggle */}
          <div className={`flex items-center ${isCollapsed ? "justify-center" : "justify-between"} px-1 py-3 mb-6`}>
            {!isCollapsed && (
              <div className="flex items-center gap-3">
                <div className="relative inline-flex items-center justify-center w-10 h-10 rounded-xl bg-slate-900 border border-slate-700/80 shadow-[0_0_15px_rgba(6,182,212,0.25)] overflow-hidden shrink-0">
                  <div className="absolute inset-0 bg-[radial-gradient(circle_at_center,rgba(6,182,212,0.15)_0%,transparent_70%)] animate-pulse" />
                  <div className="absolute -bottom-0.5 -right-0.5 w-1.5 h-1.5 rounded-full bg-emerald-500 border border-white z-20" />
                  <svg viewBox="0 0 100 100" className="w-6 h-6 relative z-10 animate-fade-in" fill="none" xmlns="http://www.w3.org/2000/svg">
                    <circle cx="50" cy="50" r="45" stroke="#334155" strokeWidth="2" strokeDasharray="8 12" className="animate-rotate-ring" />
                    <circle cx="50" cy="50" r="40" stroke="#06b6d4" strokeWidth="1.5" strokeDasharray="30 15" className="animate-rotate-ring-reverse" style={{ opacity: 0.8 }} />
                    <path d="M15 50 C 30 25, 70 25, 85 50 C 70 75, 30 75, 15 50 Z" stroke="#64748b" strokeWidth="2.5" />
                    <g className="animate-eye-lid">
                      <circle cx="50" cy="50" r="22" fill="#1e293b" stroke="#06b6d4" strokeWidth="2" />
                      <circle cx="50" cy="50" r="7" fill="#22d3ee" className="animate-pupil" />
                    </g>
                    <line x1="15" y1="50" x2="85" y2="50" stroke="#22d3ee" strokeWidth="2" className="animate-laser" />
                  </svg>
                </div>
                <div>
                  <h1 className="font-extrabold text-[17px] tracking-tight text-[var(--text-primary)] leading-none">
                    NetraID
                  </h1>
                </div>
              </div>
            )}

            {isCollapsed && (
              <div className="relative inline-flex items-center justify-center w-10 h-10 rounded-xl bg-slate-900 border border-slate-700/80 shadow-[0_0_15px_rgba(6,182,212,0.25)] overflow-hidden shrink-0">
                <div className="absolute inset-0 bg-[radial-gradient(circle_at_center,rgba(6,182,212,0.15)_0%,transparent_70%)] animate-pulse" />
                <div className="absolute -bottom-0.5 -right-0.5 w-1.5 h-1.5 rounded-full bg-emerald-500 border border-white z-20" />
                <svg viewBox="0 0 100 100" className="w-6 h-6 relative z-10 animate-fade-in" fill="none" xmlns="http://www.w3.org/2000/svg">
                  <circle cx="50" cy="50" r="45" stroke="#334155" strokeWidth="2" strokeDasharray="8 12" className="animate-rotate-ring" />
                  <circle cx="50" cy="50" r="40" stroke="#06b6d4" strokeWidth="1.5" strokeDasharray="30 15" className="animate-rotate-ring-reverse" style={{ opacity: 0.8 }} />
                  <path d="M15 50 C 30 25, 70 25, 85 50 C 70 75, 30 75, 15 50 Z" stroke="#64748b" strokeWidth="2.5" />
                  <g className="animate-eye-lid">
                    <circle cx="50" cy="50" r="22" fill="#1e293b" stroke="#06b6d4" strokeWidth="2" />
                    <circle cx="50" cy="50" r="7" fill="#22d3ee" className="animate-pupil" />
                  </g>
                  <line x1="15" y1="50" x2="85" y2="50" stroke="#22d3ee" strokeWidth="2" className="animate-laser" />
                </svg>
              </div>
            )}

            {!isCollapsed && (
              <button
                onClick={toggleCollapse}
                className="p-1.5 rounded-lg text-[var(--text-muted)] hover:text-[var(--text-primary)] hover:bg-[var(--border-subtle)] transition-all cursor-pointer"
                title="Collapse sidebar"
              >
                <Menu className="w-4 h-4" />
              </button>
            )}
          </div>

          {isCollapsed && (
            <div className="flex justify-center mb-6">
              <button
                onClick={toggleCollapse}
                className="p-1.5 rounded-lg text-[var(--text-muted)] hover:text-[var(--text-primary)] hover:bg-[var(--border-subtle)] transition-all cursor-pointer"
                title="Expand sidebar"
              >
                <Menu className="w-4 h-4" />
              </button>
            </div>
          )}

          {/* Navigation */}
          <nav className="flex-1 space-y-4">
            {visibleNavItems.map((item) => (
              <NavLink
                key={item.href}
                item={item}
                isActive={isLinkActive(item.href)}
                isCollapsed={isCollapsed}
              />
            ))}
          </nav>

          {/* User Profile Footer */}
          <div className="pt-3 border-t border-[var(--border-subtle)]">
            <div className={`flex items-center ${isCollapsed ? "justify-center" : "gap-3"} p-2 rounded-xl hover:bg-[var(--border-subtle)] transition-all group cursor-default`}>
              <Link href="/profile" className="flex items-center gap-3 flex-1 min-w-0">
                <div className="relative shrink-0">
                  <div className="w-8 h-8 rounded-full bg-[var(--text-primary)] flex items-center justify-center font-bold text-sm text-[var(--bg-base)] shadow-sm">
                    {initials}
                  </div>
                  <div className="absolute -bottom-0.5 -right-0.5 w-2.5 h-2.5 rounded-full bg-emerald-500 border-2 border-white" />
                </div>
                {!isCollapsed && (
                  <div className="flex-1 min-w-0">
                    <p className="text-xs font-semibold text-[var(--text-primary)] truncate leading-none">
                      {user?.role?.name || "Admin"}
                    </p>
                    <p className="text-[10px] text-[var(--text-muted)] truncate mt-1">
                      {user?.email}
                    </p>
                  </div>
                )}
              </Link>
              {!isCollapsed && (
                <div className="flex items-center gap-1 shrink-0">
                  <Link
                    href="/profile"
                    title="View Profile"
                    className="p-1.5 rounded-lg text-[var(--text-muted)] hover:text-[var(--text-primary)] hover:bg-[var(--border-subtle)] transition-all opacity-80 hover:opacity-100 cursor-pointer"
                  >
                    <User className="w-3.5 h-3.5" />
                  </Link>
                  <button
                    onClick={handleLogout}
                    title="Sign out"
                    className="p-1.5 rounded-lg text-[var(--text-muted)] hover:text-rose-600 hover:bg-rose-50 transition-all opacity-80 hover:opacity-100 cursor-pointer"
                  >
                    <LogOut className="w-3.5 h-3.5" />
                  </button>
                </div>
              )}
            </div>
            
            {isCollapsed && (
              <div className="flex flex-col items-center gap-2 mt-2">
                <Link
                  href="/profile"
                  title="View Profile"
                  className="p-1.5 rounded-lg text-[var(--text-muted)] hover:text-[var(--text-primary)] hover:bg-[var(--border-subtle)] transition-all cursor-pointer"
                >
                  <User className="w-4 h-4" />
                </Link>
                <button
                  onClick={handleLogout}
                  title="Sign out"
                  className="p-1.5 rounded-lg text-[var(--text-muted)] hover:text-rose-600 hover:bg-rose-50 transition-all cursor-pointer"
                >
                  <LogOut className="w-4 h-4" />
                </button>
              </div>
            )}
          </div>
        </div>
      </aside>

      {/* ─── Mobile Top Bar ─── */}
      <div className="md:hidden fixed top-0 left-0 right-0 h-14 z-50 flex items-center justify-between px-5 border-b border-[var(--border-subtle)] bg-[var(--bg-surface)]/95 backdrop-blur-xl no-print">
        <div className="flex items-center gap-3">
          <div className="relative inline-flex items-center justify-center w-10 h-10 rounded-xl bg-slate-900 border border-slate-700/80 shadow-[0_0_15px_rgba(6,182,212,0.25)] overflow-hidden shrink-0">
            <div className="absolute inset-0 bg-[radial-gradient(circle_at_center,rgba(6,182,212,0.15)_0%,transparent_70%)] animate-pulse" />
            <div className="absolute -bottom-0.5 -right-0.5 w-1.5 h-1.5 rounded-full bg-emerald-500 border border-white z-20" />
            <svg viewBox="0 0 100 100" className="w-6 h-6 relative z-10 animate-fade-in" fill="none" xmlns="http://www.w3.org/2000/svg">
              <circle cx="50" cy="50" r="45" stroke="#334155" strokeWidth="2" strokeDasharray="8 12" className="animate-rotate-ring" />
              <path d="M15 50 C 30 25, 70 25, 85 50 C 70 75, 30 75, 15 50 Z" stroke="#64748b" strokeWidth="2.5" />
              <g className="animate-eye-lid">
                <circle cx="50" cy="50" r="22" fill="#1e293b" stroke="#06b6d4" strokeWidth="2" />
                <circle cx="50" cy="50" r="7" fill="#22d3ee" className="animate-pupil" />
              </g>
              <line x1="15" y1="50" x2="85" y2="50" stroke="#22d3ee" strokeWidth="2" className="animate-laser" />
            </svg>
          </div>
          <span className="font-extrabold text-[17px] text-[var(--text-primary)] tracking-tight">NetraID</span>
          {currentTime && (
            <span className="text-[10px] font-mono bg-[var(--border-subtle)] px-2 py-0.5 rounded-lg text-[var(--text-secondary)] tabular-nums font-semibold">
              {currentTime.split(" ")[0]} {currentTime.split(" ")[1] || ""}
            </span>
          )}
        </div>
        <div className="flex items-center gap-2">
          {/* Notification Bell with Dropdown (Mobile) */}
          <div className="relative">
            <button
              onClick={() => setShowNotifications(!showNotifications)}
              className="p-2 rounded-lg hover:bg-[var(--border-subtle)] text-[var(--text-muted)] hover:text-[var(--text-primary)] transition-all cursor-pointer relative flex items-center justify-center"
              title="Notifications"
            >
              {notifications.filter(n => !n.is_read).length > 0 ? (
                <>
                  <BellRing className="w-5 h-5 text-cyan-500 animate-pulse" />
                  <span className="absolute top-1 right-1 flex h-4 w-4 items-center justify-center rounded-full bg-cyan-500 text-[9px] font-black text-white ring-2 ring-white dark:ring-zinc-900 leading-none">
                    {notifications.filter(n => !n.is_read).length}
                  </span>
                </>
              ) : (
                <Bell className="w-5 h-5" />
              )}
            </button>

            {showNotifications && (
              <>
                <div 
                  className="fixed inset-0 z-40" 
                  onClick={() => setShowNotifications(false)} 
                />
                <div className="absolute right-0 mt-2 w-72 max-h-[300px] overflow-y-auto bg-[var(--bg-surface)] border border-[var(--border-subtle)] rounded-2xl shadow-2xl z-50 p-3.5 animate-fadeInUp">
                  <div className="flex items-center justify-between border-b border-[var(--border-subtle)] pb-2 mb-2.5">
                    <span className="text-[10px] font-black uppercase tracking-wider text-[var(--text-secondary)]">Notifications</span>
                    {notifications.filter(n => !n.is_read).length > 0 && (
                      <button
                        onClick={markAllAsRead}
                        className="text-[9px] font-bold text-cyan-600 dark:text-cyan-400 hover:underline cursor-pointer"
                      >
                        Mark all read
                      </button>
                    )}
                  </div>
                  
                  <div className="space-y-2">
                    {notifications.length === 0 ? (
                      <p className="text-[11px] text-[var(--text-muted)] text-center py-6 font-medium">No new notifications</p>
                    ) : (
                      notifications.map((n) => (
                        <div 
                          key={n.id}
                          onClick={() => {
                            if (!n.is_read) markAsRead(n.id);
                          }}
                          className={`p-2.5 rounded-xl border text-[11px] transition-all cursor-pointer text-left ${
                            n.is_read 
                              ? "bg-[var(--bg-surface)] border-[var(--border-subtle)] text-[var(--text-muted)]" 
                              : "bg-[var(--border-subtle)]/30 border-cyan-500/20 text-[var(--text-primary)] hover:bg-[var(--border-subtle)]/50"
                          }`}
                        >
                          <div className="flex items-center justify-between gap-1 mb-1">
                            <span className="font-bold tracking-tight truncate">{n.title}</span>
                            <span className={`text-[7.5px] uppercase font-mono px-1 rounded-sm ${
                              n.priority === "High" 
                                ? "bg-rose-500/10 text-rose-500" 
                                : n.priority === "Medium"
                                  ? "bg-amber-500/10 text-amber-500"
                                  : "bg-zinc-500/10 text-zinc-500"
                            }`}>
                              {n.priority}
                            </span>
                          </div>
                          <p className="text-[10px] text-[var(--text-secondary)] leading-relaxed">{n.message}</p>
                          <span className="text-[7.5px] font-mono text-[var(--text-muted)] block mt-1.5">
                            {new Date(n.created_at).toLocaleString([], { month: "short", day: "numeric", hour: "2-digit", minute: "2-digit" })}
                          </span>
                        </div>
                      ))
                    )}
                  </div>
                </div>
              </>
            )}
          </div>

          {/* Theme Toggle Mobile */}
          <button
            onClick={toggleTheme}
            className="p-2 rounded-lg hover:bg-[var(--border-subtle)] text-[var(--text-muted)] hover:text-[var(--text-primary)] transition-all cursor-pointer"
            title="Toggle theme"
          >
            {theme === "dark" ? <Sun className="w-5 h-5 text-amber-500" /> : <Moon className="w-5 h-5" />}
          </button>
          <button
            onClick={() => setSidebarOpen(!sidebarOpen)}
            className="p-2 rounded-lg hover:bg-[var(--border-subtle)] text-[var(--text-muted)] hover:text-[var(--text-primary)] transition-all cursor-pointer"
          >
            {sidebarOpen ? <X className="w-5 h-5" /> : <Menu className="w-5 h-5" />}
          </button>
        </div>
      </div>

      {/* ─── Mobile Drawer ─── */}
      <div
        className={`md:hidden fixed inset-0 z-50 bg-slate-900/60 backdrop-blur-sm transition-opacity duration-300 no-print ${
          sidebarOpen ? "opacity-100 pointer-events-auto" : "opacity-0 pointer-events-none"
        }`}
        onClick={() => setSidebarOpen(false)}
      >
        <aside
          className={`fixed top-0 right-0 w-[280px] h-full bg-[var(--bg-surface)] shadow-2xl border-l border-[var(--border-subtle)] flex flex-col z-50 transform transition-transform duration-300 ease-out ${
            sidebarOpen ? "translate-x-0" : "translate-x-full"
          }`}
          onClick={(e) => e.stopPropagation()}
        >
          {/* Header inside Drawer */}
          <div className="flex items-center justify-between p-5 border-b border-[var(--border-subtle)]">
            <div className="flex items-center gap-3">
              <div className="relative inline-flex items-center justify-center w-9 h-9 rounded-xl bg-slate-900 border border-slate-700/80 shadow-[0_0_15px_rgba(6,182,212,0.25)] overflow-hidden shrink-0">
                <div className="absolute inset-0 bg-[radial-gradient(circle_at_center,rgba(6,182,212,0.15)_0%,transparent_70%)] animate-pulse" />
                <div className="absolute -bottom-0.5 -right-0.5 w-1.5 h-1.5 rounded-full bg-emerald-500 border border-white z-20" />
                <svg viewBox="0 0 100 100" className="w-5 h-5 relative z-10" fill="none" xmlns="http://www.w3.org/2000/svg">
                  <circle cx="50" cy="50" r="45" stroke="#334155" strokeWidth="2" strokeDasharray="8 12" />
                  <path d="M15 50 C 30 25, 70 25, 85 50 C 70 75, 30 75, 15 50 Z" stroke="#64748b" strokeWidth="2.5" />
                  <circle cx="50" cy="50" r="22" fill="#1e293b" stroke="#06b6d4" strokeWidth="2" />
                  <circle cx="50" cy="50" r="7" fill="#22d3ee" />
                </svg>
              </div>
              <h1 className="font-extrabold text-[18px] text-[var(--text-primary)] tracking-tight">NetraID</h1>
            </div>
            <button onClick={() => setSidebarOpen(false)} className="p-2 rounded-lg text-[var(--text-muted)] hover:bg-[var(--border-subtle)] hover:text-[var(--text-primary)] transition-all">
              <X className="w-5 h-5" />
            </button>
          </div>

          <nav className="flex-1 overflow-y-auto space-y-4 p-4">
            <div className="mb-2 px-3 text-[10px] font-bold tracking-widest text-[var(--text-muted)] uppercase">Menu</div>
            {visibleNavItems.map((item) => (
              <NavLink
                key={item.href}
                item={item}
                isActive={isLinkActive(item.href)}
                isCollapsed={false}
                onClick={() => setSidebarOpen(false)}
              />
            ))}
            
          </nav>

          <div className="p-4 border-t border-[var(--border-subtle)] bg-[var(--bg-surface)]">
            <div className="flex items-center gap-3 p-3 rounded-xl bg-[var(--border-subtle)]/50 border border-[var(--border-subtle)]">
              <Link href="/profile" onClick={() => setSidebarOpen(false)} className="flex items-center gap-3 flex-1 min-w-0">
                <div className="w-9 h-9 rounded-full bg-[var(--text-primary)] flex items-center justify-center font-bold text-sm text-[var(--bg-base)] shadow-md">
                  {initials}
                </div>
                <div className="flex-1 min-w-0">
                  <p className="text-xs font-bold text-[var(--text-primary)] truncate">{user?.role?.name}</p>
                  <p className="text-[10px] text-[var(--text-muted)] truncate">{user?.email}</p>
                </div>
              </Link>
              <Link href="/profile" onClick={() => setSidebarOpen(false)} className="p-2 rounded-lg text-[var(--text-muted)] hover:text-[var(--text-primary)] cursor-pointer transition-all">
                <User className="w-4 h-4" />
              </Link>
              <button onClick={handleLogout} className="p-2 rounded-lg text-[var(--text-muted)] hover:text-rose-500 hover:bg-rose-500/10 cursor-pointer transition-all">
                <LogOut className="w-4 h-4" />
              </button>
            </div>
          </div>
        </aside>
      </div>

      {/* ─── Main Content ─── */}
      <main className="flex-1 flex flex-col relative z-10 pt-14 md:pt-0 overflow-hidden">
        {/* Desktop Top Navbar */}
        <header className="hidden md:flex h-14 border-b border-[var(--border-subtle)] px-8 items-center justify-between bg-[var(--bg-surface)]/95 backdrop-blur-xl sticky top-0 z-30">
          <div className="flex-1" />
          
          <div className="flex items-center gap-6">
            <div className="flex items-center gap-2 font-mono text-[12px] text-[var(--text-secondary)] font-medium">
              <Clock className="w-4 h-4 text-cyan-500 animate-pulse" />
              <span>{currentDate}</span>
              {currentTime && (
                <>
                  <span className="text-[var(--border-subtle)] px-1">|</span>
                  <span className="tabular-nums font-bold text-[var(--text-primary)]">{currentTime}</span>
                </>
              )}
            </div>

            {/* Notification Bell with Dropdown (Desktop) */}
            <div className="relative">
              <button
                onClick={() => setShowNotifications(!showNotifications)}
                className="p-2 rounded-lg hover:bg-[var(--border-subtle)] text-[var(--text-muted)] hover:text-[var(--text-primary)] transition-all cursor-pointer relative flex items-center justify-center"
                title="Notifications"
              >
                {notifications.filter(n => !n.is_read).length > 0 ? (
                  <>
                    <BellRing className="w-5 h-5 text-cyan-500 animate-pulse" />
                    <span className="absolute top-1 right-1 flex h-4 w-4 items-center justify-center rounded-full bg-cyan-500 text-[9px] font-black text-white ring-2 ring-white dark:ring-zinc-900 leading-none">
                      {notifications.filter(n => !n.is_read).length}
                    </span>
                  </>
                ) : (
                  <Bell className="w-5 h-5" />
                )}
              </button>

              {showNotifications && (
                <>
                  <div 
                    className="fixed inset-0 z-40" 
                    onClick={() => setShowNotifications(false)} 
                  />
                  <div className="absolute right-0 mt-2 w-80 max-h-[350px] overflow-y-auto bg-[var(--bg-surface)] border border-[var(--border-subtle)] rounded-2xl shadow-2xl z-50 p-4 animate-fadeInUp">
                    <div className="flex items-center justify-between border-b border-[var(--border-subtle)] pb-2.5 mb-3">
                      <span className="text-[10px] font-black uppercase tracking-wider text-[var(--text-secondary)]">Notifications</span>
                      {notifications.filter(n => !n.is_read).length > 0 && (
                        <button
                          onClick={markAllAsRead}
                          className="text-[9px] font-bold text-cyan-600 dark:text-cyan-400 hover:underline cursor-pointer"
                        >
                          Mark all read
                        </button>
                      )}
                    </div>
                    
                    <div className="space-y-2.5">
                      {notifications.length === 0 ? (
                        <p className="text-[11px] text-[var(--text-muted)] text-center py-6 font-medium">No new notifications</p>
                      ) : (
                        notifications.map((n) => (
                          <div 
                            key={n.id}
                            onClick={() => {
                              if (!n.is_read) markAsRead(n.id);
                            }}
                            className={`p-2.5 rounded-xl border text-[11px] transition-all cursor-pointer text-left ${
                              n.is_read 
                                ? "bg-[var(--bg-surface)] border-[var(--border-subtle)] text-[var(--text-muted)]" 
                                : "bg-[var(--border-subtle)]/30 border-cyan-500/20 text-[var(--text-primary)] hover:bg-[var(--border-subtle)]/50"
                            }`}
                          >
                            <div className="flex items-center justify-between gap-1 mb-1">
                              <span className="font-bold tracking-tight truncate">{n.title}</span>
                              <span className={`text-[7.5px] uppercase font-mono px-1 rounded-sm ${
                                n.priority === "High" 
                                  ? "bg-rose-500/10 text-rose-500" 
                                  : n.priority === "Medium"
                                    ? "bg-amber-500/10 text-amber-500"
                                    : "bg-zinc-500/10 text-zinc-500"
                              }`}>
                                {n.priority}
                              </span>
                            </div>
                            <p className="text-[10px] text-[var(--text-secondary)] leading-relaxed">{n.message}</p>
                            <span className="text-[7.5px] font-mono text-[var(--text-muted)] block mt-1.5">
                              {new Date(n.created_at).toLocaleString([], { month: "short", day: "numeric", hour: "2-digit", minute: "2-digit" })}
                            </span>
                          </div>
                        ))
                      )}
                    </div>
                  </div>
                </>
              )}
            </div>

            <button
              onClick={toggleTheme}
              className="p-2 rounded-lg hover:bg-[var(--border-subtle)] text-[var(--text-muted)] hover:text-[var(--text-primary)] transition-all cursor-pointer"
              title="Toggle theme"
            >
              {theme === "dark" ? <Sun className="w-5 h-5 text-amber-500" /> : <Moon className="w-5 h-5" />}
            </button>
          </div>
        </header>

        <div 
          key={pathname}
          className="flex-1 overflow-y-auto max-w-7xl mx-auto w-full px-5 py-6 md:px-8 md:py-8 page-enter"
        >
          {children}
        </div>
      </main>

      {/* Exit App Confirmation Modal */}
      {showExitConfirm && (
        <div className="fixed inset-0 z-[999] flex items-center justify-center bg-black/60 backdrop-blur-xs px-4">
          <div className="bg-white dark:bg-zinc-900 rounded-3xl p-6 max-w-sm w-full border border-zinc-200/50 dark:border-zinc-800 shadow-2xl space-y-4 animate-scaleUp">
            <div className="text-center space-y-2">
              <div className="w-12 h-12 rounded-2xl bg-rose-500/10 text-rose-600 flex items-center justify-center mx-auto border border-rose-500/20">
                <HelpCircle className="w-6 h-6" />
              </div>
              <h3 className="text-sm font-black uppercase tracking-wider text-zinc-900 dark:text-zinc-200 font-mono">Exit Application?</h3>
              <p className="text-xs text-zinc-500 dark:text-zinc-400">
                Are you sure you want to close the NetraID application?
              </p>
            </div>
            <div className="flex gap-3">
              <button
                onClick={() => setShowExitConfirm(false)}
                className="flex-1 py-2.5 bg-zinc-100 hover:bg-zinc-200 dark:bg-zinc-800 dark:hover:bg-zinc-700 text-zinc-700 dark:text-zinc-300 font-bold text-xs rounded-xl cursor-pointer active:scale-95 transition-all font-sans"
              >
                Cancel
              </button>
              <button
                onClick={() => {
                  setShowExitConfirm(false);
                  if (typeof window !== "undefined") {
                    window.close();
                    try {
                      window.open('', '_self', '')?.close();
                    } catch (e) {}
                    setAppClosed(true);
                  }
                }}
                className="flex-1 py-2.5 bg-rose-600 hover:bg-rose-500 text-white font-bold text-xs rounded-xl cursor-pointer active:scale-95 transition-all shadow-md shadow-rose-600/10 font-sans"
              >
                Exit
              </button>
            </div>
          </div>
        </div>
      )}

      {/* Branded Goodbye Overlay Fallback */}
      {appClosed && (
        <div className="fixed inset-0 z-[1000] flex flex-col items-center justify-center bg-zinc-950 px-6 text-center select-none animate-fadeIn">
          <div className="space-y-6 max-w-sm">
            <div className="w-20 h-20 rounded-3xl bg-cyan-500/10 text-cyan-400 flex items-center justify-center mx-auto border border-cyan-500/20 animate-pulse">
              <Shield className="w-10 h-10 stroke-[1.5]" />
            </div>
            
            <div className="space-y-2">
              <h2 className="text-lg font-black uppercase tracking-wider text-zinc-100 font-mono">NetraID Closed</h2>
              <p className="text-xs text-zinc-400 leading-relaxed">
                The session has been terminated safely. You can now close this browser tab or swipe away the application window.
              </p>
            </div>

            <div className="pt-4">
              <button 
                onClick={() => {
                  setAppClosed(false);
                  router.push("/dashboard");
                }}
                className="px-6 py-2.5 bg-zinc-900 hover:bg-zinc-800 border border-zinc-800 text-zinc-350 font-bold text-xs rounded-xl cursor-pointer active:scale-95 transition-all font-sans"
              >
                Return to Dashboard
              </button>
            </div>
          </div>
        </div>
      )}
    </div>
  );
}