// Mobile Navigation Toggle
const navToggle = document.querySelector('.nav-toggle');
const navMenu = document.querySelector('.nav-menu');

if (navToggle) {
    navToggle.addEventListener('click', () => {
        navMenu.classList.toggle('active');
        
        // Animate hamburger icon
        const spans = navToggle.querySelectorAll('span');
        if (navMenu.classList.contains('active')) {
            spans[0].style.transform = 'rotate(45deg) translate(5px, 5px)';
            spans[1].style.opacity = '0';
            spans[2].style.transform = 'rotate(-45deg) translate(7px, -6px)';
        } else {
            spans[0].style.transform = 'none';
            spans[1].style.opacity = '1';
            spans[2].style.transform = 'none';
        }
    });
}

// Close mobile menu when clicking on a link
const navLinks = document.querySelectorAll('.nav-menu a');
navLinks.forEach(link => {
    link.addEventListener('click', () => {
        navMenu.classList.remove('active');
        const spans = navToggle.querySelectorAll('span');
        spans[0].style.transform = 'none';
        spans[1].style.opacity = '1';
        spans[2].style.transform = 'none';
    });
});

// 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 offsetTop = target.offsetTop - 80; // Account for fixed navbar
            window.scrollTo({
                top: offsetTop,
                behavior: 'smooth'
            });
        }
    });
});

// Navbar background on scroll
const navbar = document.querySelector('.navbar');
let lastScroll = 0;

window.addEventListener('scroll', () => {
    const currentScroll = window.pageYOffset;
    
    if (currentScroll > 100) {
        navbar.style.boxShadow = '0 4px 6px -1px rgba(0, 0, 0, 0.1)';
    } else {
        navbar.style.boxShadow = '0 1px 2px 0 rgba(0, 0, 0, 0.05)';
    }
    
    lastScroll = currentScroll;
});

// Contact Form Handling
const contactForm = document.getElementById('contactForm');
if (contactForm) {
    contactForm.addEventListener('submit', (e) => {
        e.preventDefault();
        
        // Get form data
        const formData = {
            name: document.getElementById('name').value,
            email: document.getElementById('email').value,
            message: document.getElementById('message').value
        };
        
        // In a real application, you would send this to a backend
        // For now, we'll just show a success message
        alert('Thank you for your message! We will get back to you within 24 hours.\n\nNote: This is a demo. In production, this would send an email to support@xtimchat.com');
        
        // Reset form
        contactForm.reset();
    });
}

// Intersection Observer for fade-in 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', () => {
    const animatedElements = document.querySelectorAll('.feature-card, .screenshot-card, .tech-item');
    animatedElements.forEach(el => {
        el.style.opacity = '0';
        el.style.transform = 'translateY(20px)';
        el.style.transition = 'opacity 0.6s ease, transform 0.6s ease';
        observer.observe(el);
    });
});

// Add active state to navigation links based on scroll position
const sections = document.querySelectorAll('section[id]');

window.addEventListener('scroll', () => {
    const scrollY = window.pageYOffset;

    sections.forEach(section => {
        const sectionHeight = section.offsetHeight;
        const sectionTop = section.offsetTop - 100;
        const sectionId = section.getAttribute('id');

        if (scrollY > sectionTop && scrollY <= sectionTop + sectionHeight) {
            navLinks.forEach(link => {
                link.classList.remove('active');
                if (link.getAttribute('href') === `#${sectionId}`) {
                    link.classList.add('active');
                }
            });
        }
    });
});

// Add hover effect to buttons
document.querySelectorAll('.btn').forEach(btn => {
    btn.addEventListener('mouseenter', function() {
        this.style.transition = 'all 0.3s ease';
    });
});

// Purchase button click handler
document.querySelectorAll('a[href="#pricing"], a[href="#contact"]').forEach(btn => {
    if (btn.textContent.includes('Purchase') || btn.textContent.includes('Get Started')) {
        btn.addEventListener('click', (e) => {
            // In a real application, this would redirect to a payment page
            // For demo purposes, we'll just scroll to contact section
            if (btn.getAttribute('href') === '#pricing') {
                e.preventDefault();
                const contactSection = document.querySelector('#contact');
                if (contactSection) {
                    contactSection.scrollIntoView({ behavior: 'smooth', block: 'start' });
                }
            }
        });
    }
});

// Add loading animation
window.addEventListener('load', () => {
    document.body.style.opacity = '0';
    document.body.style.transition = 'opacity 0.3s ease';
    setTimeout(() => {
        document.body.style.opacity = '1';
    }, 100);
});