"use client";

import Link from "next/link";
import Image from "next/image";
import { usePathname } from "next/navigation";
import {
  Moon,
  Sun,
  Menu,
  X,
  LayoutDashboard,
  User,
  Receipt,
  CreditCard,
  LogOut,
} from "lucide-react";
import { useState } from "react";
import { Button } from "@/components/ui/button";
import { Avatar, AvatarFallback } from "@/components/ui/avatar";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuLabel,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import { ConfirmDialog } from "@/components/shared/ConfirmDialog";
import { useAuth } from "@/hooks/useAuth";
import { useAppDispatch } from "@/hooks/useRedux";
import { toggleTheme } from "@/store/slices/themeSlice";
import { useTheme } from "next-themes";
import { getInitials } from "@/utils";
import { ROUTES, APP_NAME } from "@/constants";
import { cn } from "@/utils";

const navLinks = [
  {
    href: ROUTES.DASHBOARD,
    label: "Dashboard",
    icon: LayoutDashboard,
    auth: true,
  },
  { href: ROUTES.PRICING, label: "Plans", icon: CreditCard, auth: false },
  { href: ROUTES.TRANSACTIONS, label: "Billing", icon: Receipt, auth: true },
  { href: ROUTES.ACCOUNT, label: "Account", icon: User, auth: true },
];

export function Navbar() {
  const { user, isAuthenticated, logout } = useAuth();

  const dispatch = useAppDispatch();
  const { setTheme, theme } = useTheme();
  const pathname = usePathname();
  const [mobileOpen, setMobileOpen] = useState(false);
  const [logoutDialogOpen, setLogoutDialogOpen] = useState(false);

  const handleThemeToggle = () => {
    const newTheme = theme === "dark" ? "light" : "dark";
    setTheme(newTheme);
    dispatch(toggleTheme());
  };

  const handleLogoutConfirm = async () => {
    setLogoutDialogOpen(false);
    await logout();
  };

  const visibleLinks = navLinks.filter((l) => !l.auth || isAuthenticated);

  return (
    <header className="fixed top-0 left-0 right-0 z-40 h-16">
      <div className="absolute inset-0 bg-background/80 backdrop-blur-xl border-b border-border" />
      <nav className="relative h-full max-w-7xl mx-auto px-4 sm:px-6 flex items-center justify-between">
        {/* Logo */}
        <Link href={ROUTES.HOME} className="flex items-center gap-2.5 group">
          <div className="flex h-9 w-9 items-center justify-center rounded-lg overflow-hidden">
            <Image
              src="/logo.png"
              alt="Activate Abundanate"
              width={36}
              height={36}
              className="object-contain"
            />
          </div>
          <span className="font-display text-lg font-bold tracking-tight text-foreground">
            {APP_NAME}
          </span>
        </Link>

        {/* Desktop Nav */}
        <div className="hidden md:flex items-center gap-1">
          {visibleLinks.map((link) => (
            <Link
              key={link.href}
              href={link.href}
              className={cn(
                "flex items-center gap-2 px-3 py-2 rounded-lg text-sm font-medium transition-all duration-200",
                pathname === link.href
                  ? "bg-brand-500/10 text-brand-500 dark:text-brand-300"
                  : "text-muted-foreground hover:text-foreground hover:bg-accent",
              )}
            >
              <link.icon className="h-4 w-4" />
              {link.label}
            </Link>
          ))}
        </div>

        {/* Actions */}
        <div className="flex items-center gap-2">
          {/* Theme toggle */}
          <Button
            variant="ghost"
            size="icon"
            onClick={handleThemeToggle}
            className="rounded-lg"
          >
            {theme === "dark" ? (
              <Sun className="h-4 w-4" />
            ) : (
              <Moon className="h-4 w-4" />
            )}
          </Button>

          {isAuthenticated && user ? (
            <DropdownMenu>
              <DropdownMenuTrigger asChild>
                <button className="flex items-center rounded-xl p-1 hover:bg-accent transition-colors border border-border">
                  <Avatar className="h-7 w-7">
                    <AvatarFallback className="text-xs bg-brand-500 text-white font-semibold">
                      {getInitials([user.email].filter(Boolean).join(" "))}
                    </AvatarFallback>
                  </Avatar>
                </button>
              </DropdownMenuTrigger>
              <DropdownMenuContent align="end" className="w-56">
                <DropdownMenuLabel>
                  <div>
                    <p className="font-medium">
                      {[user.first_name, user.last_name]
                        .filter(Boolean)
                        .join(" ")}
                    </p>
                    <p className="text-xs text-muted-foreground truncate">
                      {user.email}
                    </p>
                  </div>
                </DropdownMenuLabel>
                <DropdownMenuSeparator />
                <DropdownMenuItem asChild>
                  <Link
                    href={ROUTES.DASHBOARD}
                    className="flex items-center gap-2"
                  >
                    <LayoutDashboard className="h-4 w-4" /> Dashboard
                  </Link>
                </DropdownMenuItem>
                <DropdownMenuItem asChild>
                  <Link
                    href={ROUTES.ACCOUNT}
                    className="flex items-center gap-2"
                  >
                    <User className="h-4 w-4" /> Account
                  </Link>
                </DropdownMenuItem>
                <DropdownMenuItem asChild>
                  <Link
                    href={ROUTES.TRANSACTIONS}
                    className="flex items-center gap-2"
                  >
                    <Receipt className="h-4 w-4" /> Billing
                  </Link>
                </DropdownMenuItem>
                <DropdownMenuSeparator />
                <DropdownMenuItem
                  className="text-destructive focus:text-destructive focus:bg-destructive/10"
                  onClick={() => setLogoutDialogOpen(true)}
                >
                  <LogOut className="h-4 w-4" /> Logout
                </DropdownMenuItem>
              </DropdownMenuContent>
            </DropdownMenu>
          ) : (
            <div className="hidden md:flex items-center gap-2">
              <Button variant="ghost" size="sm" asChild>
                <Link href={ROUTES.LOGIN}>Sign in</Link>
              </Button>
              <Button variant="gold" size="sm" asChild>
                <Link href={ROUTES.PRICING}>Get Started</Link>
              </Button>
            </div>
          )}

          {/* Mobile menu toggle */}
          <Button
            variant="ghost"
            size="icon"
            className="md:hidden"
            onClick={() => setMobileOpen(!mobileOpen)}
          >
            {mobileOpen ? (
              <X className="h-5 w-5" />
            ) : (
              <Menu className="h-5 w-5" />
            )}
          </Button>
        </div>
      </nav>

      {/* Mobile Menu */}
      {mobileOpen && (
        <div className="md:hidden absolute top-16 left-0 right-0 bg-background/98 backdrop-blur-xl border-b border-border p-4 space-y-1 shadow-lg">
          {visibleLinks.map((link) => (
            <Link
              key={link.href}
              href={link.href}
              onClick={() => setMobileOpen(false)}
              className={cn(
                "flex items-center gap-2.5 px-3 py-2.5 rounded-lg text-sm font-medium transition-all",
                pathname === link.href
                  ? "bg-brand-500/10 text-brand-500 dark:text-brand-300"
                  : "text-muted-foreground hover:text-foreground hover:bg-accent",
              )}
            >
              <link.icon className="h-4 w-4" />
              {link.label}
            </Link>
          ))}
          {!isAuthenticated && (
            <div className="pt-3 flex flex-col gap-2 border-t border-border mt-2">
              <Button variant="glass" asChild>
                <Link href={ROUTES.LOGIN} onClick={() => setMobileOpen(false)}>
                  Sign in
                </Link>
              </Button>
              <Button variant="gold" asChild>
                <Link
                  href={ROUTES.PRICING}
                  onClick={() => setMobileOpen(false)}
                >
                  Get Started
                </Link>
              </Button>
            </div>
          )}
        </div>
      )}

      <ConfirmDialog
        open={logoutDialogOpen}
        onOpenChange={setLogoutDialogOpen}
        title="Sign Out"
        description="Are you sure you want to sign out of your account?"
        confirmLabel="Sign Out"
        onConfirm={handleLogoutConfirm}
      />
    </header>
  );
}