// Initialize everything when DOM is loaded
document.addEventListener('DOMContentLoaded', function() {
    // Initialize mobile menu
    initMobileMenu();
    
    // Initialize smooth scrolling
    initSmoothScroll();
    
    // Initialize form handling
    initSignupForm();
    
    // Initialize scroll animations
    initScrollAnimations();
    
    // Initialize parallax effects
    initParallaxEffects();
});

// Mobile menu functionality
function initMobileMenu() {
    const mobileMenuBtn = document.getElementById('mobileMenuBtn');
    const nav = document.querySelector('nav');
    
    if (mobileMenuBtn) {
        mobileMenuBtn.addEventListener('click', function() {
            // Toggle mobile menu
            const mobileMenu = document.createElement('div');
            mobileMenu.className = 'fixed inset-0 bg-white z-40 mobile-menu-enter';
            mobileMenu.innerHTML = `
                <div class="p-6">
                    <div class="flex justify-between items-center mb-8">
                        <span class="text-2xl font-bold text-gradient">StartupLaunch Pro</span>
                        <button id="closeMobileMenu" class="p-2">
                            <i data-feather="x"></i>
                        </button>
                    </div>
                    <div class="flex flex-col space-y-4">
                        <a href="#features" class="text-lg text-gray-700 hover:text-purple-600 transition">Features</a>
                        <a href="#solution" class="text-lg text-gray-700 hover:text-purple-600 transition">Solution</a>
                        <a href="#team" class="text-lg text-gray-700 hover:text-purple-600 transition">Team</a>
                        <a href="#press" class="text-lg text-gray-700 hover:text-purple-600 transition">Press</a>
                        <button class="bg-gradient-to-r from-purple-600 to-indigo-600 text-white px-6 py-3 rounded-full hover:shadow-lg transition mt-4">
                            Get Started
                        </button>
                    </div>
                </div>
            `;
            
            document.body.appendChild(mobileMenu);
            feather.replace();
            
            // Close menu functionality
            document.getElementById('closeMobileMenu').addEventListener('click', function() {
                mobileMenu.remove();
            });
            
            // Close on link click
            mobileMenu.querySelectorAll('a').forEach(link => {
                link.addEventListener('click', function() {
                    mobileMenu.remove();
                });
            });
        });
    }
}

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

// Email signup form handling
function initSignupForm() {
    const signupForm = document.getElementById('signupForm');
    const emailInput = document.getElementById('emailInput');
    const successMessage = document.getElementById('successMessage');
    
    if (signupForm) {
        signupForm.addEventListener('submit', function(e) {
            e.preventDefault();
            
            const email = emailInput.value;
            
            // Validate email
            if (!validateEmail(email)) {
                showError('Please enter a valid email address');
                return;
            }
            
            // Simulate API call
            const button = signupForm.querySelector('button[type="submit"]');
            const originalText = button.textContent;
            button.textContent = 'Sending...';
            button.disabled = true;
            
            setTimeout(() => {
                // Show success message
                successMessage.classList.remove('hidden');
                emailInput.value = '';
                button.textContent = originalText;
                button.disabled = false;
                
                // Hide success message after 5 seconds
                setTimeout(() => {
                    successMessage.classList.add('hidden');
                }, 5000);
                
                // Store email (in real app, this would be sent to backend)
                console.log('Email signed up:', email);
            }, 1500);
        });
    }
}

// Email validation helper
function validateEmail(email) {
    const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return re.test(email);
}

// Show error message
function showError(message) {
    const errorDiv = document.createElement('div');
    errorDiv.className = 'fixed top-20 right-6 bg-red-500 text-white px-6 py-3 rounded-lg shadow-lg z-50';
    errorDiv.textContent = message;
    document.body.appendChild(errorDiv);
    
    setTimeout(() => {
        errorDiv.remove();
    }, 3000);
}

// Scroll animations
function initScrollAnimations() {
    // Add animation to elements when they come into view
    const observerOptions = {
        threshold: 0.1,
        rootMargin: '0px 0px -100px 0px'
    };
    
    const observer = new IntersectionObserver(function(entries) {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.style.opacity = '1';
                entry.target.style.transform = 'translateY(0)';
            }
        });
    }, observerOptions);
    
    // Observe elements with animation
    document.querySelectorAll('[data-aos]').forEach(el => {
        el.style.opacity = '0';
        el.style.transform = 'translateY(20px)';
        el.style.transition = 'all 0.6s ease-out';
        observer.observe(el);
    });
}

// Parallax effects
function initParallaxEffects() {
    let ticking = false;
    
    function updateParallax() {
        const scrolled = window.pageYOffset;
        const parallaxElements = document.querySelectorAll('.float-animation');
        
        parallaxElements.forEach(el => {
            const speed = 0.5;
            const yPos = -(scrolled * speed);
            el.style.transform = `translateY(${yPos}px)`;
        });
        
        ticking = false;
    }
    
    function requestTick() {
        if (!ticking) {
            window.requestAnimationFrame(updateParallax);
            ticking = true;
        }
    }
    
    window.addEventListener('scroll', requestTick);
}

// Add number counter animation
function animateCounter(element, target, duration = 2000) {
    let start = 0;
    const increment = target / (duration / 16);
    
    const timer = setInterval(() => {
        start += increment;
        if (start >= target) {
            element.textContent = target.toLocaleString();
            clearInterval(timer);
        } else {
            element.textContent = Math.floor(start).toLocaleString();
        }
    }, 16);
}

// Lazy load images
function lazyLoadImages() {
    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-image');
                img.classList.add('loaded');
                imageObserver.unobserve(img);
            }
        });
    });
    
    images.forEach(img => {
        img.classList.add('lazy-image');
        imageObserver.observe(img);
    });
}

// Add hover effect to cards
document.querySelectorAll('.hover-lift').forEach(card => {
    card.addEventListener('mouseenter', function() {
        this.style.transform = 'translateY(-10px) scale(1.02)';
    });
    
    card.addEventListener('mouseleave', function() {
        this.style.transform = 'translateY(0) scale(1)';
    });
});

// Add typing effect to hero text
function typeWriter(element, text, speed = 50) {
    let i = 0;
    element.textContent = '';
    
    function type() {
        if (i < text.length) {
            element.textContent += text.charAt(i);
            i++;
            setTimeout(type, speed);
        }
    }
    
    type();
}

// Initialize on scroll progress bar
function initScrollProgress() {
    const progressBar = document.createElement('div');
    progressBar.className = 'fixed top-0 left-0 w-full h-1 bg-gradient-to-r from-purple-600 to-indigo-600 z-50 transform origin-left';
    progressBar.style.transform = 'scaleX(0)';
    progressBar.style.transition = 'transform 0.1s';
    document.body.appendChild(progressBar);
    
    window.addEventListener('scroll', () => {
        const scrolled = window.pageYOffset;
        const maxScroll = document.documentElement.scrollHeight - window.innerHeight;
        const progress = scrolled / maxScroll;
        progressBar.style.transform = `scaleX(${progress})`;
    });
}

// Initialize all features
window.addEventListener('load', () => {
    lazyLoadImages();
    initScrollProgress();
    
    // Add loading animation removal
    document.body.classList.add('loaded');
});