"use client";

import Link from "next/link";
import { usePathname } from "next/navigation";
import { useSession, signOut } from "next-auth/react";

const Navigation = () => {
	const pathname = usePathname();
	const { data: session, status } = useSession();

	const isActive = (path) => {
		if (path === "/") return pathname === "/";
		// Exact match for paths
		if (pathname === path) return true;
		// For nested paths, ensure we match the full path segment
		if (pathname.startsWith(path + "/")) return true;
		return false;
	};

	const navItems = [
		{ href: "/", label: "Dashboard" },
		{ href: "/projects", label: "Projects" },
		{ href: "/tasks/templates", label: "Task Templates" },
		{ href: "/project-tasks", label: "Project Tasks" },
		{ href: "/contracts", label: "Contracts" },
	];

	// Add admin-only items
	if (session?.user?.role === 'admin') {
		navItems.push({ href: "/admin/users", label: "User Management" });
	}

	const handleSignOut = async () => {
		await signOut({ callbackUrl: "/auth/signin" });
	};

	// Don't show navigation on auth pages
	if (pathname.startsWith('/auth/')) {
		return null;
	}

	return (
		<nav className="bg-white border-b border-gray-200">
			<div className="max-w-6xl mx-auto px-6">
				<div className="flex items-center justify-between h-16">
					<div className="flex items-center">
						<Link href="/" className="text-xl font-bold text-gray-900">
							Project Panel
						</Link>
					</div>

					<div className="flex items-center space-x-4">
						{status === "loading" ? (
							<div className="text-gray-500">Loading...</div>
						) : session ? (
							<>
								<div className="flex space-x-8">
									{navItems.map((item) => (
										<Link
											key={item.href}
											href={item.href}
											className={`px-3 py-2 rounded-md text-sm font-medium transition-colors ${
												isActive(item.href)
													? "bg-blue-100 text-blue-700"
													: "text-gray-600 hover:text-gray-900 hover:bg-gray-50"
											}`}
										>
											{item.label}
										</Link>
									))}
								</div>
								
								<div className="flex items-center space-x-4 ml-8 pl-8 border-l border-gray-200">
									<div className="flex items-center space-x-2">
										<div className="text-sm">
											<div className="font-medium text-gray-900">{session.user.name}</div>
											<div className="text-gray-500 capitalize">{session.user.role?.replace('_', ' ')}</div>
										</div>
									</div>
									
									<button
										onClick={handleSignOut}
										className="bg-gray-100 hover:bg-gray-200 text-gray-700 px-3 py-2 rounded-md text-sm font-medium transition-colors"
									>
										Sign Out
									</button>
								</div>
							</>
						) : (
							<Link
								href="/auth/signin"
								className="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded-md text-sm font-medium transition-colors"
							>
								Sign In
							</Link>
						)}
					</div>
				</div>
			</div>
		</nav>
	);
};

export default Navigation;