// Main JavaScript for HexaHost.de
(function() {
    'use strict';

    // DOM Elements
    const navToggle = document.querySelector('.nav-toggle');
    const navMenu = document.querySelector('.nav-menu');
    const navLinks = document.querySelectorAll('.nav-link');
    const glassCards = document.querySelectorAll('.glass-card');
    const productCards = document.querySelectorAll('.product-card');

    // Mobile Navigation Toggle
    if (navToggle && navMenu) {
        navToggle.addEventListener('click', function() {
            navMenu.classList.toggle('active');
            navToggle.classList.toggle('active');
        });

        // Close mobile menu when clicking on a link
        navLinks.forEach(link => {
            link.addEventListener('click', function() {
                navMenu.classList.remove('active');
                navToggle.classList.remove('active');
            });
        });
    }

    // Smooth scrolling 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) {
                target.scrollIntoView({
                    behavior: 'smooth',
                    block: 'start'
                });
            }
        });
    });

    // Enhanced glass card hover effects
    glassCards.forEach(card => {
        card.addEventListener('mouseenter', function() {
            this.style.transform = 'translateY(-8px) scale(1.02)';
        });

        card.addEventListener('mouseleave', function() {
            this.style.transform = 'translateY(0) scale(1)';
        });
    });

    // Product card interactive effects
    productCards.forEach(card => {
        card.addEventListener('mouseenter', function() {
            if (!this.classList.contains('featured')) {
                this.style.transform = 'translateY(-10px) scale(1.03)';
            }
        });

        card.addEventListener('mouseleave', function() {
            if (!this.classList.contains('featured')) {
                this.style.transform = 'translateY(0) scale(1)';
            }
        });
    });

    // Intersection Observer for animations
    const observerOptions = {
        threshold: 0.1,
        rootMargin: '0px 0px -50px 0px'
    };

    const observer = new IntersectionObserver(function(entries) {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.classList.add('animate-in');
            }
        });
    }, observerOptions);

    // Observe elements for animation
    const animateElements = document.querySelectorAll('.glass-card, .feature-item, .product-card');
    animateElements.forEach(el => {
        observer.observe(el);
    });

    // Header scroll effect - always visible with transparency change
    const header = document.querySelector('.header');

    window.addEventListener('scroll', function() {
        const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
        
        if (scrollTop > 50) {
            // Scrolled down - make header more opaque
            header.classList.add('scrolled');
        } else {
            // At top - make header more transparent
            header.classList.remove('scrolled');
        }
    });

    // Add parallax effect to hero section
    const hero = document.querySelector('.hero');
    if (hero) {
        window.addEventListener('scroll', function() {
            const scrolled = window.pageYOffset;
            const rate = scrolled * -0.5;
            hero.style.transform = `translateY(${rate}px)`;
        });
    }

    // Form validation (for contact forms)
    const forms = document.querySelectorAll('form');
    forms.forEach(form => {
        form.addEventListener('submit', function(e) {
            const requiredFields = form.querySelectorAll('[required]');
            let isValid = true;

            requiredFields.forEach(field => {
                if (!field.value.trim()) {
                    isValid = false;
                    field.classList.add('error');
                    
                    // Remove error class on focus
                    field.addEventListener('focus', function() {
                        this.classList.remove('error');
                    }, { once: true });
                }
            });

            if (!isValid) {
                e.preventDefault();
                showNotification('Bitte füllen Sie alle Pflichtfelder aus.', 'error');
            }
        });
    });

    // Notification system
    function showNotification(message, type = 'info') {
        const notification = document.createElement('div');
        notification.className = `notification notification-${type}`;
        notification.textContent = message;
        
        notification.style.position = 'fixed';
        notification.style.top = '20px';
        notification.style.right = '20px';
        notification.style.padding = '15px 20px';
        notification.style.borderRadius = '8px';
        notification.style.color = 'white';
        notification.style.fontWeight = '500';
        notification.style.zIndex = '9999';
        notification.style.transform = 'translateX(400px)';
        notification.style.transition = 'transform 0.3s ease-in-out';
        
        if (type === 'error') {
            notification.style.background = 'linear-gradient(135deg, #ef4444, #dc2626)';
        } else if (type === 'success') {
            notification.style.background = 'linear-gradient(135deg, #10b981, #059669)';
        } else {
            notification.style.background = 'linear-gradient(135deg, #3b82f6, #2563eb)';
        }
        
        document.body.appendChild(notification);
        
        // Animate in
        setTimeout(() => {
            notification.style.transform = 'translateX(0)';
        }, 100);
        
        // Remove after 5 seconds
        setTimeout(() => {
            notification.style.transform = 'translateX(400px)';
            setTimeout(() => {
                if (notification.parentNode) {
                    notification.parentNode.removeChild(notification);
                }
            }, 300);
        }, 5000);
    }

    // Lazy loading for images
    const images = document.querySelectorAll('img[data-src]');
    const imageObserver = new IntersectionObserver((entries, observer) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                const img = entry.target;
                img.src = img.dataset.src;
                img.classList.remove('lazy');
                imageObserver.unobserve(img);
            }
        });
    });

    images.forEach(img => imageObserver.observe(img));

    // Performance optimization: Debounce scroll events
    function debounce(func, wait) {
        let timeout;
        return function executedFunction(...args) {
            const later = () => {
                clearTimeout(timeout);
                func(...args);
            };
            clearTimeout(timeout);
            timeout = setTimeout(later, wait);
        };
    }

    // Apply debounce to scroll events
    const debouncedScrollHandler = debounce(function() {
        // Any scroll-based animations or calculations
        updateScrollProgress();
    }, 16); // ~60fps

    window.addEventListener('scroll', debouncedScrollHandler);

    // Scroll progress indicator
    function updateScrollProgress() {
        const scrollTop = window.pageYOffset;
        const docHeight = document.body.scrollHeight - window.innerHeight;
        const scrollPercent = (scrollTop / docHeight) * 100;
        
        // You can use this to show a progress bar
        document.documentElement.style.setProperty('--scroll-progress', scrollPercent + '%');
    }

    // Dark mode toggle (future feature)
    function initDarkMode() {
        const darkModeToggle = document.querySelector('.dark-mode-toggle');
        if (darkModeToggle) {
            darkModeToggle.addEventListener('click', function() {
                document.body.classList.toggle('dark-mode');
                localStorage.setItem('darkMode', document.body.classList.contains('dark-mode'));
            });

            // Check for saved dark mode preference
            if (localStorage.getItem('darkMode') === 'true') {
                document.body.classList.add('dark-mode');
            }
        }
    }

    // Initialize all features when DOM is loaded
    document.addEventListener('DOMContentLoaded', function() {
        initDarkMode();
        
        // Add loading animation complete class
        document.body.classList.add('loaded');
        
        // Show welcome message on first visit
        if (!localStorage.getItem('hasVisited')) {
            setTimeout(() => {
                showNotification('Willkommen bei HexaHost.de! 🚀', 'success');
                localStorage.setItem('hasVisited', 'true');
            }, 1000);
        }
    });

    // Export functions for global access if needed
    window.HexaHost = {
        showNotification: showNotification
    };

})();