---
import { getLangFromUrl, useTranslations } from '../i18n/ui';
import LanguageSelector from './LanguageSelector.astro';
import ThemeToggle from './ThemeToggle.astro';
import { Menu, X } from 'lucide-astro';

const lang = getLangFromUrl(Astro.url);
const t = useTranslations(lang);
---

<header class="fixed top-0 left-0 right-0 z-50 transition-all duration-300" data-header>
  <nav class="container-custom">
    <div class="flex items-center justify-between h-20 px-4 transition-all duration-300" data-nav-container>
      <!-- Logo -->
      <a href={lang === 'ar' ? '/' : `/${lang}`} class="flex items-center">
        <img 
          src="/logo.jpg" 
          alt="Blueprint Engineering Consultancy Logo" 
          class="h-14 w-auto transition-all duration-300" 
          data-logo
        />
      </a>

      <!-- Desktop Navigation -->
      <div class="hidden lg:flex items-center space-x-8 rtl:space-x-reverse">
        <a href="#about" class="nav-link">{t('nav.about')}</a>
        <a href="#services" class="nav-link">{t('nav.services')}</a>
        <a href="#workflow" class="nav-link">{t('nav.workflow')}</a>
        <a href="#contact" class="nav-link">{t('nav.contact')}</a>
      </div>

      <!-- Language Selector & Theme Toggle -->
      <div class="flex items-center space-x-4 rtl:space-x-reverse">
        <ThemeToggle />
        <LanguageSelector />
        
        <!-- Mobile Menu Button -->
        <button class="lg:hidden text-white p-2" data-mobile-menu-toggle>
          <Menu class="w-6 h-6" data-menu-icon />
          <X class="w-6 h-6 hidden" data-close-icon />
        </button>
      </div>
    </div>

    <!-- Mobile Navigation -->
    <div class="lg:hidden hidden bg-blueprint-primary/95 backdrop-blur-md border-t border-blueprint-accent/20" data-mobile-menu>
      <div class="px-4 py-4 space-y-4">
        <a href="#about" class="block nav-link">{t('nav.about')}</a>
        <a href="#services" class="block nav-link">{t('nav.services')}</a>
        <a href="#workflow" class="block nav-link">{t('nav.workflow')}</a>
        <a href="#contact" class="block nav-link">{t('nav.contact')}</a>
      </div>
    </div>
  </nav>
</header>

<script>
  // Mobile menu toggle
  const mobileMenuToggle = document.querySelector('[data-mobile-menu-toggle]');
  const mobileMenu = document.querySelector('[data-mobile-menu]');
  const menuIcon = document.querySelector('[data-menu-icon]');
  const closeIcon = document.querySelector('[data-close-icon]');

  mobileMenuToggle?.addEventListener('click', () => {
    mobileMenu?.classList.toggle('hidden');
    menuIcon?.classList.toggle('hidden');
    closeIcon?.classList.toggle('hidden');
  });

  // Header scroll effects
  let lastScrollTop = 0;
  const header = document.querySelector('[data-header]') as HTMLElement;
  const navContainer = document.querySelector('[data-nav-container]') as HTMLElement;
  const logo = document.querySelector('[data-logo]') as HTMLElement;

  function updateHeader() {
    const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
    
    if (scrollTop > 50) {
      // Scrolled state
      header.classList.add('bg-blueprint-primary/95', 'backdrop-blur-md', 'border-b', 'border-blueprint-accent/20', 'shadow-lg');
      navContainer.classList.add('h-16');
      navContainer.classList.remove('h-20');
      logo.classList.add('h-10');
      logo.classList.remove('h-14');
    } else {
      // Top state
      header.classList.remove('bg-blueprint-primary/95', 'backdrop-blur-md', 'border-b', 'border-blueprint-accent/20', 'shadow-lg');
      navContainer.classList.remove('h-16');
      navContainer.classList.add('h-20');
      logo.classList.remove('h-10');
      logo.classList.add('h-14');
    }

    // Hide/show header on scroll
    if (scrollTop > lastScrollTop && scrollTop > 100) {
      // Scrolling down
      header.style.transform = 'translateY(-100%)';
    } else {
      // Scrolling up
      header.style.transform = 'translateY(0)';
    }
    
    lastScrollTop = scrollTop <= 0 ? 0 : scrollTop;
  }

  window.addEventListener('scroll', updateHeader);
  
  // Initial call
  updateHeader();

  // Smooth scroll for anchor links
  document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function (e) {
      e.preventDefault();
      const target = document.querySelector(this.getAttribute('href'));
      if (target) {
        const headerHeight = header?.offsetHeight || 0;
        const targetPosition = target.offsetTop - headerHeight - 20;
        window.scrollTo({
          top: targetPosition,
          behavior: 'smooth'
        });
        
        // Close mobile menu if open
        mobileMenu?.classList.add('hidden');
        menuIcon?.classList.remove('hidden');
        closeIcon?.classList.add('hidden');
      }
    });
  });
</script>

<style>
  .nav-link {
    @apply text-white hover:text-blueprint-accent transition-colors duration-300 font-medium;
  }
  
  .nav-link:hover {
    @apply text-blueprint-accent;
  }
</style>