// Mobile Navigation Toggle
document.addEventListener('DOMContentLoaded', function() {
    const hamburger = document.querySelector('.hamburger');
    const navMenu = document.querySelector('.nav-menu');
    const navLinks = document.querySelectorAll('.nav-link');

    // Toggle mobile menu
    hamburger.addEventListener('click', function() {
        hamburger.classList.toggle('active');
        navMenu.classList.toggle('active');
    });

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

    // Close mobile menu when clicking outside
    document.addEventListener('click', function(event) {
        if (!hamburger.contains(event.target) && !navMenu.contains(event.target)) {
            hamburger.classList.remove('active');
            navMenu.classList.remove('active');
        }
    });
});

// Smooth Scrolling for Navigation Links
document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function (e) {
        e.preventDefault();
        const target = document.querySelector(this.getAttribute('href'));
        if (target) {
            const offsetTop = target.offsetTop - 80; // Account for fixed navbar
            window.scrollTo({
                top: offsetTop,
                behavior: 'smooth'
            });
        }
    });
});

// Navbar Background Change on Scroll
window.addEventListener('scroll', function() {
    const navbar = document.querySelector('.navbar');
    if (window.scrollY > 100) {
        navbar.style.backgroundColor = 'rgba(255, 255, 255, 0.98)';
        navbar.style.boxShadow = '0 4px 6px -1px rgb(0 0 0 / 0.1)';
    } else {
        navbar.style.backgroundColor = 'rgba(255, 255, 255, 0.95)';
        navbar.style.boxShadow = '0 1px 2px 0 rgb(0 0 0 / 0.05)';
    }
});

// Form Handling
document.querySelector('.form').addEventListener('submit', function(e) {
    e.preventDefault();
    
    // Get form data
    const formData = new FormData(this);
    const data = Object.fromEntries(formData);
    
    // Basic validation
    if (!data.name || !data.email || !data.phone || !data.service) {
        showNotification('Please fill in all required fields.', 'error');
        return;
    }
    
    // Email validation
    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    if (!emailRegex.test(data.email)) {
        showNotification('Please enter a valid email address.', 'error');
        return;
    }
    
    // Phone validation (basic)
    const phoneRegex = /^[\+]?[1-9][\d]{0,15}$/;
    if (!phoneRegex.test(data.phone.replace(/\D/g, ''))) {
        showNotification('Please enter a valid phone number.', 'error');
        return;
    }
    
    // Simulate form submission
    const submitButton = this.querySelector('button[type="submit"]');
    const originalText = submitButton.textContent;
    submitButton.textContent = 'Sending...';
    submitButton.disabled = true;
    
    // Simulate API call
    setTimeout(() => {
        showNotification('Thank you! Your appointment request has been sent. We will contact you within 24 hours.', 'success');
        this.reset();
        submitButton.textContent = originalText;
        submitButton.disabled = false;
    }, 2000);
});

// Notification System
function showNotification(message, type = 'info') {
    // Remove existing notifications
    const existingNotifications = document.querySelectorAll('.notification');
    existingNotifications.forEach(notification => notification.remove());
    
    // Create notification element
    const notification = document.createElement('div');
    notification.className = `notification notification-${type}`;
    notification.innerHTML = `
        <div class="notification-content">
            <span class="notification-message">${message}</span>
            <button class="notification-close">&times;</button>
        </div>
    `;
    
    // Add styles
    notification.style.cssText = `
        position: fixed;
        top: 100px;
        right: 20px;
        background: ${type === 'success' ? '#10b981' : type === 'error' ? '#ef4444' : '#3b82f6'};
        color: white;
        padding: 1rem 1.5rem;
        border-radius: 0.5rem;
        box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
        z-index: 1001;
        max-width: 400px;
        animation: slideInRight 0.3s ease-out;
    `;
    
    // Add close functionality
    const closeButton = notification.querySelector('.notification-close');
    closeButton.style.cssText = `
        background: none;
        border: none;
        color: white;
        font-size: 1.5rem;
        cursor: pointer;
        margin-left: 1rem;
        padding: 0;
    `;
    
    closeButton.addEventListener('click', () => {
        notification.style.animation = 'slideOutRight 0.3s ease-out';
        setTimeout(() => notification.remove(), 300);
    });
    
    // Add to page
    document.body.appendChild(notification);
    
    // Auto remove after 5 seconds
    setTimeout(() => {
        if (notification.parentNode) {
            notification.style.animation = 'slideOutRight 0.3s ease-out';
            setTimeout(() => notification.remove(), 300);
        }
    }, 5000);
}

// Add notification animations to CSS
const notificationStyles = document.createElement('style');
notificationStyles.textContent = `
    @keyframes slideInRight {
        from {
            transform: translateX(100%);
            opacity: 0;
        }
        to {
            transform: translateX(0);
            opacity: 1;
        }
    }
    
    @keyframes slideOutRight {
        from {
            transform: translateX(0);
            opacity: 1;
        }
        to {
            transform: translateX(100%);
            opacity: 0;
        }
    }
    
    .notification-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
`;
document.head.appendChild(notificationStyles);

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

const observer = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
        if (entry.isIntersecting) {
            entry.target.style.opacity = '1';
            entry.target.style.transform = 'translateY(0)';
        }
    });
}, observerOptions);

// Observe elements for animation
document.addEventListener('DOMContentLoaded', function() {
    const animatedElements = document.querySelectorAll('.service-card, .testimonial-card, .approach-point, .credential-item');
    
    animatedElements.forEach(el => {
        el.style.opacity = '0';
        el.style.transform = 'translateY(30px)';
        el.style.transition = 'opacity 0.6s ease-out, transform 0.6s ease-out';
        observer.observe(el);
    });
});

// Form Input Enhancement
document.addEventListener('DOMContentLoaded', function() {
    const inputs = document.querySelectorAll('input, select, textarea');
    
    inputs.forEach(input => {
        // Add focus/blur effects
        input.addEventListener('focus', function() {
            this.parentNode.classList.add('focused');
        });
        
        input.addEventListener('blur', function() {
            this.parentNode.classList.remove('focused');
            if (this.value) {
                this.parentNode.classList.add('filled');
            } else {
                this.parentNode.classList.remove('filled');
            }
        });
        
        // Check if input has value on load
        if (input.value) {
            input.parentNode.classList.add('filled');
        }
    });
});

// Accessibility Enhancements
document.addEventListener('DOMContentLoaded', function() {
    // Add keyboard navigation for mobile menu
    hamburger.addEventListener('keydown', function(e) {
        if (e.key === 'Enter' || e.key === ' ') {
            e.preventDefault();
            this.click();
        }
    });
    
    // Add ARIA labels for better accessibility
    const hamburger = document.querySelector('.hamburger');
    if (hamburger) {
        hamburger.setAttribute('aria-label', 'Toggle navigation menu');
        hamburger.setAttribute('role', 'button');
        hamburger.setAttribute('tabindex', '0');
    }
    
    // Add skip link for keyboard users
    const skipLink = document.createElement('a');
    skipLink.href = '#main-content';
    skipLink.textContent = 'Skip to main content';
    skipLink.className = 'skip-link';
    skipLink.style.cssText = `
        position: absolute;
        top: -40px;
        left: 6px;
        background: #000;
        color: #fff;
        padding: 8px;
        text-decoration: none;
        z-index: 1002;
        border-radius: 4px;
    `;
    
    skipLink.addEventListener('focus', function() {
        this.style.top = '6px';
    });
    
    skipLink.addEventListener('blur', function() {
        this.style.top = '-40px';
    });
    
    document.body.insertBefore(skipLink, document.body.firstChild);
    
    // Add main content ID
    const heroSection = document.querySelector('.hero');
    if (heroSection) {
        heroSection.id = 'main-content';
    }
});

// Performance Optimization - Lazy Loading for Images
document.addEventListener('DOMContentLoaded', function() {
    if ('IntersectionObserver' in window) {
        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);
                }
            });
        });
        
        const lazyImages = document.querySelectorAll('img[data-src]');
        lazyImages.forEach(img => imageObserver.observe(img));
    }
});

// Contact Form Phone Number Formatting
document.addEventListener('DOMContentLoaded', function() {
    const phoneInput = document.querySelector('input[name="phone"]');
    if (phoneInput) {
        phoneInput.addEventListener('input', function(e) {
            let value = e.target.value.replace(/\D/g, '');
            if (value.length >= 6) {
                value = value.replace(/(\d{3})(\d{3})(\d{4})/, '($1) $2-$3');
            } else if (value.length >= 3) {
                value = value.replace(/(\d{3})(\d{0,3})/, '($1) $2');
            }
            e.target.value = value;
        });
    }
});

// Scroll to Top Functionality
document.addEventListener('DOMContentLoaded', function() {
    // Create scroll to top button
    const scrollTopBtn = document.createElement('button');
    scrollTopBtn.innerHTML = '↑';
    scrollTopBtn.className = 'scroll-top-btn';
    scrollTopBtn.setAttribute('aria-label', 'Scroll to top');
    scrollTopBtn.style.cssText = `
        position: fixed;
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        border-radius: 50%;
        background: var(--primary-color);
        color: white;
        border: none;
        font-size: 20px;
        cursor: pointer;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1000;
        box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    `;
    
    document.body.appendChild(scrollTopBtn);
    
    // Show/hide scroll to top button
    window.addEventListener('scroll', function() {
        if (window.pageYOffset > 300) {
            scrollTopBtn.style.opacity = '1';
            scrollTopBtn.style.visibility = 'visible';
        } else {
            scrollTopBtn.style.opacity = '0';
            scrollTopBtn.style.visibility = 'hidden';
        }
    });
    
    // Scroll to top functionality
    scrollTopBtn.addEventListener('click', function() {
        window.scrollTo({
            top: 0,
            behavior: 'smooth'
        });
    });
});

// Error Handling for External Resources
window.addEventListener('error', function(e) {
    console.warn('Resource failed to load:', e.target.src || e.target.href);
}, true);

// Service Worker Registration (for future PWA capabilities)
if ('serviceWorker' in navigator) {
    window.addEventListener('load', function() {
        // Uncomment when service worker is implemented
        // navigator.serviceWorker.register('/sw.js')
        //     .then(registration => console.log('SW registered'))
        //     .catch(error => console.log('SW registration failed'));
    });
}