'use client';

import { Train, Menu, X, Moon, Sun, HelpCircle } from 'lucide-react';
import Link from 'next/link';
import { useEffect, useState } from 'react';
import { usePathname } from 'next/navigation';
import { LanguageSwitcher } from './LanguageSwitcher';

export default function AppHeader() {
  const pathname = usePathname();
  const [isOpen, setIsOpen] = useState(false);
  const [isDark, setIsDark] = useState(false);

  useEffect(() => {
    const isDarkMode = document.documentElement.classList.contains('dark');
    setIsDark(isDarkMode);
  }, []);

  const toggleTheme = () => {
    const html = document.documentElement;
    const isDarkMode = html.classList.contains('dark');
    if (isDarkMode) {
      html.classList.remove('dark');
      setIsDark(false);
      localStorage.setItem('theme', 'light');
    } else {
      html.classList.add('dark');
      setIsDark(true);
      localStorage.setItem('theme', 'dark');
    }
  };

  const isLandingPage = ['/', '/services', '/about', '/contact', '/help'].includes(pathname);
  
  return (
    <header className="sticky top-0 z-50 bg-[rgb(20_113_76)] dark:bg-gray-900 border-b border-[rgb(16_89_60)] dark:border-gray-800 shadow-sm">
      <div className="container mx-auto px-4">
        <div className="max-w-6xl mx-auto">
          <div className="flex items-center justify-between h-16">
            {/* Logo */}
            <Link 
              href="/" 
              className="flex items-center gap-3 hover:opacity-80 transition-opacity"
            >
              <div className="w-10 h-10 bg-white rounded-lg flex items-center justify-center">
                <Train className="w-6 h-6 text-[rgb(20_113_76)]" />
              </div>
              <div>
                <h1 className="text-lg font-bold text-white">
                  Ethio-Djibouti Railway
                </h1>
                <p className="text-xs text-gray-100">
                  Book your train journey with us
                </p>
              </div>
            </Link>

            {/* Desktop Menu - only show for landing pages */}
            {isLandingPage && (
              <div className="hidden md:flex items-center gap-8">
                <Link
                  href="/"
                  className="text-sm font-medium text-gray-100 hover:text-white transition-colors"
                >
                  Home
                </Link>
                <Link
                  href="/services"
                  className="text-sm font-medium text-gray-100 hover:text-white transition-colors"
                >
                  Services
                </Link>
                <Link
                  href="/about"
                  className="text-sm font-medium text-gray-100 hover:text-white transition-colors"
                >
                  About
                </Link>
                <Link
                  href="/contact"
                  className="text-sm font-medium text-gray-100 hover:text-white transition-colors"
                >
                  Contact
                </Link>
              </div>
            )}

            {/* Right Actions */}
            <div className="flex items-center gap-2">
              {/* Help Link */}
              <Link
                href="/help"
                className="hidden sm:flex items-center justify-center p-2 text-gray-100 hover:bg-white hover:bg-opacity-10 rounded-lg transition-colors"
                title="Help & FAQ"
              >
                <HelpCircle className="w-5 h-5" />
              </Link>

              {/* Language Switcher */}
              <LanguageSwitcher />

              {/* Theme Toggler */}
              <button
                onClick={toggleTheme}
                className="p-2 text-gray-100 hover:bg-white hover:bg-opacity-10 rounded-lg transition-colors"
                title={isDark ? 'Light mode' : 'Dark mode'}
              >
                {isDark ? (
                  <Sun className="w-5 h-5" />
                ) : (
                  <Moon className="w-5 h-5" />
                )}
              </button>

              {/* Mobile Menu Button */}
              <button
                onClick={() => setIsOpen(!isOpen)}
                className="md:hidden p-2 text-gray-100 hover:bg-white hover:bg-opacity-10 rounded-lg"
              >
                {isOpen ? <X className="w-5 h-5" /> : <Menu className="w-5 h-5" />}
              </button>
            </div>
          </div>

          {/* Mobile Menu */}
          {isOpen && (
            <div className="md:hidden border-t border-white border-opacity-20 dark:border-gray-700 py-4 space-y-2 animate-in slide-in-from-top-2 duration-200">
              {isLandingPage && (
                <>
                  <Link
                    href="/"
                    className="block px-4 py-2 text-gray-100 dark:text-gray-300 hover:bg-white hover:bg-opacity-10 dark:hover:bg-gray-800 rounded-lg transition-colors"
                    onClick={() => setIsOpen(false)}
                  >
                    Home
                  </Link>
                  <Link
                    href="/services"
                    className="block px-4 py-2 text-gray-100 dark:text-gray-300 hover:bg-white hover:bg-opacity-10 dark:hover:bg-gray-800 rounded-lg transition-colors"
                    onClick={() => setIsOpen(false)}
                  >
                    Services
                  </Link>
                  <Link
                    href="/about"
                    className="block px-4 py-2 text-gray-100 dark:text-gray-300 hover:bg-white hover:bg-opacity-10 dark:hover:bg-gray-800 rounded-lg transition-colors"
                    onClick={() => setIsOpen(false)}
                  >
                    About
                  </Link>
                  <Link
                    href="/contact"
                    className="block px-4 py-2 text-gray-100 dark:text-gray-300 hover:bg-white hover:bg-opacity-10 dark:hover:bg-gray-800 rounded-lg transition-colors"
                    onClick={() => setIsOpen(false)}
                  >
                    Contact
                  </Link>
                </>
              )}
              
              <Link
                href="/help"
                className="block px-4 py-2 text-gray-100 dark:text-gray-300 hover:bg-white hover:bg-opacity-10 dark:hover:bg-gray-800 rounded-lg transition-colors"
                onClick={() => setIsOpen(false)}
              >
                Help
              </Link>
            </div>
          )}
        </div>
      </div>
    </header>
  );
}