// Main JavaScript for ZenFlow Harmony Studio

document.addEventListener('DOMContentLoaded', function() {
    // Initialize Feather Icons
    if (typeof feather !== 'undefined') {
        feather.replace();
    }

    // Smooth scroll for anchor links
    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
        anchor.addEventListener('click', function (e) {
            const targetId = this.getAttribute('href');
            if (targetId === '#') return;
            
            const targetElement = document.querySelector(targetId);
            if (targetElement) {
                e.preventDefault();
                window.scrollTo({
                    top: targetElement.offsetTop - 80,
                    behavior: 'smooth'
                });
                
                // Update URL without page reload
                history.pushState(null, null, targetId);
            }
        });
    });

    // Booking Form Submission
    const bookingForm = document.getElementById('bookingForm');
    const bookingSuccess = document.getElementById('bookingSuccess');

    if (bookingForm) {
        bookingForm.addEventListener('submit', function(e) {
            e.preventDefault();
            
            // Get form data
            const formData = {
                name: document.getElementById('name').value,
                email: document.getElementById('email').value,
                phone: document.getElementById('phone').value,
                classType: document.getElementById('classType').value,
                date: document.getElementById('date').value,
                time: document.getElementById('time').value,
                message: document.getElementById('message').value
            };

            // Validate form
            if (!validateForm(formData)) {
                return;
            }

            // Simulate form submission
            const submitButton = bookingForm.querySelector('button[type="submit"]');
            const originalText = submitButton.textContent;
            
            submitButton.innerHTML = '<span class="spinner"></span>';
            submitButton.disabled = true;

            // Simulate API call
            setTimeout(() => {
                // Show success message
                bookingForm.style.display = 'none';
                bookingSuccess.style.display = 'block';
                
                // Reset button
                submitButton.textContent = originalText;
                submitButton.disabled = false;
                
                // Reset form
                bookingForm.reset();
                
                // Hide success message after 5 seconds
                setTimeout(() => {
                    bookingForm.style.display = 'block';
                    bookingSuccess.style.display = 'none';
                }, 5000);
            }, 1500);
        });
    }

    // Form validation
    function validateForm(data) {
        const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
        
        if (!data.name.trim()) {
            showAlert('Please enter your name', 'error');
            return false;
        }
        
        if (!emailRegex.test(data.email)) {
            showAlert('Please enter a valid email address', 'error');
            return false;
        }
        
        if (!data.classType) {
            showAlert('Please select a class type', 'error');
            return false;
        }
        
        if (!data.date) {
            showAlert('Please select a date', 'error');
            return false;
        }
        
        if (!data.time) {
            showAlert('Please select a time', 'error');
            return false;
        }
        
        return true;
    }

    // Show alert message
    function showAlert(message, type = 'info') {
        // Remove existing alerts
        const existingAlert = document.querySelector('.custom-alert');
        if (existingAlert) {
            existingAlert.remove();
        }
        
        // Create alert element
        const alert = document.createElement('div');
        alert.className = `custom-alert fixed top-4 right-4 z-50 px-6 py-4 rounded-xl shadow-lg transform transition-all duration-300 ${
            type === 'error' ? 'bg-red-900/90 text-red-100 border border-red-700' : 
            type === 'success' ? 'bg-green-900/90 text-green-100 border border-green-700' :
            'bg-blue-900/90 text-blue-100 border border-blue-700'
        }`;
        
        alert.innerHTML = `
            <div class="flex items-center">
                <i data-feather="${type === 'error' ? 'alert-circle' : type === 'success' ? 'check-circle' : 'info'}" class="w-5 h-5 mr-3"></i>
                <span>${message}</span>
            </div>
        `;
        
        document.body.appendChild(alert);
        
        // Replace feather icons
        if (typeof feather !== 'undefined') {
            feather.replace();
        }
        
        // Auto remove after 5 seconds
        setTimeout(() => {
            alert.style.opacity = '0';
            alert.style.transform = 'translateX(100%)';
            setTimeout(() => alert.remove(), 300);
        }, 5000);
    }

    // Set minimum date for booking to today
    const dateInput = document.getElementById('date');
    if (dateInput) {
        const today = new Date().toISOString().split('T')[0];
        dateInput.min = today;
        
        // Set default to tomorrow
        const tomorrow = new Date();
        tomorrow.setDate(tomorrow.getDate() + 1);
        dateInput.value = tomorrow.toISOString().split('T')[0];
    }

    // Add scroll animation to elements
    const observerOptions = {
        threshold: 0.1,
        rootMargin: '0px 0px -50px 0px'
    };

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

    // Observe all sections and cards
    document.querySelectorAll('section, .card-hover').forEach(el => {
        observer.observe(el);
    });

    // Theme toggle functionality
    const themeToggle = document.getElementById('themeToggle');
    if (themeToggle) {
        themeToggle.addEventListener('click', () => {
            const html = document.documentElement;
            if (html.classList.contains('dark')) {
                html.classList.remove('dark');
                localStorage.setItem('theme', 'light');
                showAlert('Switched to light mode', 'info');
            } else {
                html.classList.add('dark');
                localStorage.setItem('theme', 'dark');
                showAlert('Switched to dark mode', 'info');
            }
        });
    }

    // Check for saved theme preference
    const savedTheme = localStorage.getItem('theme');
    if (savedTheme === 'light') {
        document.documentElement.classList.remove('dark');
    }

    // Newsletter subscription
    const newsletterForm = document.getElementById('newsletterForm');
    if (newsletterForm) {
        newsletterForm.addEventListener('submit', function(e) {
            e.preventDefault();
            const email = this.querySelector('input[type="email"]').value;
            
            if (email) {
                // Simulate subscription
                showAlert('Thank you for subscribing to our newsletter!', 'success');
                this.reset();
            }
        });
    }

    // Class type selection in booking form
    const classTypeSelect = document.getElementById('classType');
    if (classTypeSelect) {
        classTypeSelect.addEventListener('change', function() {
            const selectedOption = this.options[this.selectedIndex];
            if (selectedOption.value) {
                // You could add additional logic here based on selection
                console.log('Selected class:', selectedOption.value);
            }
        });
    }

    // Initialize tooltips
    const tooltipElements = document.querySelectorAll('[data-tooltip]');
    tooltipElements.forEach(el => {
        el.addEventListener('mouseenter', function() {
            const tooltip = document.createElement('div');
            tooltip.className = 'absolute z-50 px-3 py-2 text-sm bg-gray-900 text-white rounded-lg shadow-lg';
            tooltip.textContent = this.getAttribute('data-tooltip');
            tooltip.style.top = `${this.offsetTop - 40}px`;
            tooltip.style.left = `${this.offsetLeft + this.offsetWidth / 2}px`;
            tooltip.style.transform = 'translateX(-50%)';
            tooltip.id = 'current-tooltip';
            
            document.body.appendChild(tooltip);
        });
        
        el.addEventListener('mouseleave', function() {
            const tooltip = document.getElementById('current-tooltip');
            if (tooltip) {
                tooltip.remove();
            }
        });
    });
});

// Utility function for debouncing
function debounce(func, wait) {
    let timeout;
    return function executedFunction(...args) {
        const later = () => {
            clearTimeout(timeout);
            func(...args);
        };
        clearTimeout(timeout);
        timeout = setTimeout(later, wait);
    };
}

// Handle window resize
window.addEventListener('resize', debounce(() => {
    // Update any responsive elements here
    console.log('Window resized');
}, 250));