'use client';

import { useState, useEffect } from 'react';
import Link from 'next/link';
import { usePathname } from 'next/navigation';
import { Moon, Sun, Activity } from 'lucide-react';
import { useTheme } from '@/components/providers/ThemeProvider';
import { Button } from '@/components/ui/button';
import { cn } from '@/lib/utils/cn';

const navItems = [
  { href: '/', label: 'Dashboard' },
  { href: '/processes', label: 'Processes' },
  { href: '/groups', label: 'Groups' },
  { href: '/logs', label: 'Logs' },
  { href: '/config', label: 'Configuration' },
];

export function Navbar() {
  const pathname = usePathname();
  const [mounted, setMounted] = useState(false);
  const { theme, setTheme, resolvedTheme } = useTheme();

  useEffect(() => {
    setMounted(true);
  }, []);

  const toggleTheme = () => {
    setTheme(resolvedTheme === 'dark' ? 'light' : 'dark');
  };

  return (
    <nav className="sticky top-0 z-50 w-full border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
      <div className="container flex h-16 items-center px-4">
        {/* Logo */}
        <Link href="/" className="flex items-center gap-2 mr-8">
          <Activity className="h-6 w-6 text-primary" />
          <span className="font-bold text-xl bg-gradient-to-r from-primary to-accent bg-clip-text text-transparent">
            Supervisor
          </span>
        </Link>

        {/* Navigation Links */}
        <div className="flex gap-1 flex-1">
          {navItems.map((item) => (
            <Link key={item.href} href={item.href}>
              <Button
                variant="ghost"
                size="sm"
                className={cn(
                  'transition-colors',
                  pathname === item.href && 'bg-accent text-accent-foreground'
                )}
              >
                {item.label}
              </Button>
            </Link>
          ))}
        </div>

        {/* Theme Toggle */}
        {mounted && (
          <Button
            variant="ghost"
            size="icon"
            onClick={toggleTheme}
            aria-label="Toggle theme"
          >
            {resolvedTheme === 'dark' ? (
              <Sun className="h-5 w-5" />
            ) : (
              <Moon className="h-5 w-5" />
            )}
          </Button>
        )}
      </div>
    </nav>
  );
}