"use client";

import Link from "next/link";
import Image from "next/image";
import { LoginLink, LogoutLink, RegisterLink } from "@kinde-oss/kinde-auth-nextjs/server";
import { useKindeBrowserClient } from "@kinde-oss/kinde-auth-nextjs";
import { useTheme } from "@/app/providers";
import {
  NavigationMenu,
  NavigationMenuContent,
  NavigationMenuItem,
  NavigationMenuLink,
  NavigationMenuList,
  NavigationMenuTrigger,
} from "@/components/ui/navigation-menu";
import { Button } from "@/components/ui/button";
import { Sheet, SheetContent, SheetTrigger } from "@/components/ui/sheet";
import { Menu, Home, Settings, User, LogOut, LogIn, ArrowLeft } from "lucide-react";
import { DarkModeToggle } from "./dark-mode-toggle";
import React from "react";
import { usePathname } from "next/navigation";

const userMenuItems = [
  {
    title: "Profile",
    href: "/profile",
    description: "Manage your profile settings",
    icon: User,
  },
  {
    title: "Settings",
    href: "/settings",
    description: "Configure your preferences",
    icon: Settings,
  },
];

export default function Header() {
  const { isAuthenticated, getUser, isLoading } = useKindeBrowserClient();
  const { theme } = useTheme();
  const user = getUser();

  const logoSrc = theme === "dark" ? "/vtorio-dark.svg" : "/vtorio.svg";
  const pathname = usePathname();

  // Don't show on dashboard or home page
  const shouldShowBackButton = pathname !== '/dashboard' && pathname !== '/';

  if (isLoading) {
    return (
      <header className="sticky top-0 z-50 w-full border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
        <div className="flex h-16 items-center justify-between">
          <div className="flex items-center gap-6 pl-4 md:pl-6">
            <Link href="/" className="flex items-center space-x-2">
              <Image
                src={logoSrc}
                alt="vtor.io"
                width={32}
                height={8}
                className="h-8 w-auto"
                priority
              />
            </Link>
            {shouldShowBackButton && (
              <Link href="/dashboard" className="flex items-center space-x-2 text-sm font-medium hover:text-accent-foreground transition-colors">
                <ArrowLeft className="h-4 w-4" />
                <span>Back to dashboard</span>
              </Link>
            )}
          </div>
          <div className="flex items-center gap-4 pr-4 md:pr-6">
            <div className="h-8 w-20 bg-gray-200 animate-pulse rounded"></div>
          </div>
        </div>
      </header>
    );
  }

  return (
    <header className="sticky top-0 z-50 w-full border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
      <div className="flex h-16 items-center justify-between pr-6">
        <div className="flex items-center gap-6 pl-4 md:pl-6">
          <Link href="/" className="flex items-center space-x-2">
            <Image
              src={logoSrc}
              alt="vtor.io"
              width={32}
              height={8}
              className="h-8 w-auto"
              priority
            />
          </Link>
          {shouldShowBackButton && (
            <Link href="/dashboard">
              <Button variant="outline" size="sm" className="flex items-center space-x-2">
                <ArrowLeft className="h-4 w-4" />
                <span>Back to dashboard</span>
              </Button>
            </Link>
          )}
        </div>

        <div className="flex items-center gap-4 pr-0 md:pr-0">
          {isAuthenticated ? (
            <>
              <NavigationMenu className="hidden md:flex">
                <NavigationMenuList>
                  <NavigationMenuItem>
                    <NavigationMenuTrigger className="h-9">
                      <div className="flex items-center gap-2">
                        <Image
                          className="rounded-full"
                          src={user?.picture || "/default-avatar.png"}
                          alt="User Avatar"
                          width={24}
                          height={24}
                        />
                        <span className="text-sm font-medium">{user?.given_name || user?.email}</span>
                      </div>
                    </NavigationMenuTrigger>
                    <NavigationMenuContent>
                      <ul className="grid gap-3 p-6 w-[300px]">
                        {userMenuItems.map((item) => (
                          <li key={item.title}>
                            <NavigationMenuLink asChild>
                              <Link
                                href={item.href}
                                className="block select-none space-y-1 rounded-md p-3 leading-none no-underline outline-none transition-colors hover:bg-accent hover:text-accent-foreground">
                                <div className="flex items-center gap-2">
                                  <item.icon className="h-4 w-4" />
                                  <div className="text-sm font-medium leading-none">{item.title}</div>
                                </div>
                                <p className="line-clamp-2 text-sm leading-snug text-muted-foreground">
                                  {item.description}
                                </p>
                              </Link>
                            </NavigationMenuLink>
                          </li>
                        ))}
                        <li>
                          <LogoutLink className="block select-none space-y-1 rounded-md p-3 leading-none no-underline outline-none transition-colors hover:bg-accent hover:text-accent-foreground">
                            <div className="flex items-center gap-2">
                              <LogOut className="h-4 w-4" />
                              <div className="text-sm font-medium leading-none">Logout</div>
                            </div>
                            <p className="line-clamp-2 text-sm leading-snug text-muted-foreground">
                              Sign out of your account
                            </p>
                          </LogoutLink>
                        </li>
                      </ul>
                    </NavigationMenuContent>
                  </NavigationMenuItem>
                </NavigationMenuList>
              </NavigationMenu>
            </>
          ) : (
            <div className="hidden md:flex items-center gap-2">
              <LoginLink>
                <Button variant="ghost" size="sm">
                  <LogIn className="h-4 w-4 mr-2" />
                  Login
                </Button>
              </LoginLink>
            </div>
          )}
          <DarkModeToggle />

          {/* Mobile Menu */}
          <Sheet>
            <SheetTrigger asChild className="md:hidden">
              <Button variant="ghost" size="icon">
                <Menu className="h-5 w-5" />
                <span className="sr-only">Toggle menu</span>
              </Button>
            </SheetTrigger>
            <SheetContent side="right" className="w-[300px]">
              <div className="flex flex-col space-y-4 mt-8">
                <Link href="/" className="flex items-center space-x-2">
                  <Home className="h-4 w-4" />
                  <span>Home</span>
                </Link>

                {isAuthenticated ? (
                  <>
                    <div className="border-t pt-4">
                      <div className="flex items-center space-x-2 mb-4">
                        <Image
                          className="rounded-full"
                          src={user?.picture || "/default-avatar.png"}
                          alt="User Avatar"
                          width={32}
                          height={32}
                        />
                        <span className="font-medium">{user?.given_name || user?.email}</span>
                      </div>

                      {userMenuItems.map((item) => (
                        <Link
                          key={item.title}
                          href={item.href}
                          className="flex items-center space-x-2 py-2">
                          <item.icon className="h-4 w-4" />
                          <span>{item.title}</span>
                        </Link>
                      ))}

                      <LogoutLink className="flex items-center space-x-2 py-2 text-red-600">
                        <LogOut className="h-4 w-4" />
                        <span>Logout</span>
                      </LogoutLink>
                    </div>
                  </>
                ) : (
                  <div className="border-t pt-4 space-y-2">
                    <LoginLink>
                      <Button variant="ghost" className="w-full justify-start">
                        <LogIn className="h-4 w-4 mr-2" />
                        Login
                      </Button>
                    </LoginLink>
                    <RegisterLink>
                      <Button className="w-full">Sign Up</Button>
                    </RegisterLink>
                  </div>
                )}
              </div>
            </SheetContent>
          </Sheet>
        </div>
      </div>
    </header>
  );
}