// Main JavaScript for NileFlow Express Logistics

// Initialize when DOM is loaded
document.addEventListener('DOMContentLoaded', function() {
    initializeAnimations();
    initializeTrackingForm();
    initializeServiceCards();
});

// Initialize scroll animations
function initializeAnimations() {
    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('fade-in-up');
                observer.unobserve(entry.target);
            }
        });
    }, observerOptions);

    // Observe all sections for animation
    document.querySelectorAll('section').forEach(section => {
        observer.observe(section);
    });
}

// Initialize tracking form functionality
function initializeTrackingForm() {
    const trackingForm = document.querySelector('#tracking-form');
    if (trackingForm) {
        trackingForm.addEventListener('submit', function(e) {
            e.preventDefault();
            const trackingNumber = this.querySelector('input[type="text"]').value;
            if (trackingNumber.trim()) {
                window.location.href = `/tracking?number=${encodeURIComponent(trackingNumber)}`;
            }
        });
    }
}

// Initialize service cards interactions
function initializeServiceCards() {
    const serviceCards = document.querySelectorAll('.service-card');
    serviceCards.forEach(card => {
        card.addEventListener('mouseenter', function() {
            this.style.transform = 'translateY(-10px)';
            this.style.boxShadow = '0 20px 40px rgba(0,0,0,0.1)';
        });

        card.addEventListener('mouseleave', function() {
            this.style.transform = 'translateY(0)';
            this.style.boxShadow = '0 10px 30px rgba(0,0,0,0.08)';
        });
    });
}

// API integration for tracking (placeholder)
async function fetchTrackingInfo(trackingNumber) {
    try {
        // This would be replaced with actual API endpoint
        const response = await fetch(`/api/tracking/${trackingNumber}`);
        const data = await response.json();
        return data;
    } catch (error) {
        console.error('Error fetching tracking info:', error);
        return null;
    }
}

// Smooth scroll to section
function scrollToSection(sectionId) {
    const element = document.getElementById(sectionId);
    if (element) {
        element.scrollIntoView({
            behavior: 'smooth',
            block: 'start'
        });
    }
}

// Mobile menu toggle (for navigation component)
function toggleMobileMenu() {
    const mobileMenu = document.querySelector('#mobile-menu');
    if (mobileMenu) {
        mobileMenu.classList.toggle('hidden');
    }
}

// Form validation for contact forms
function validateForm(form) {
    const inputs = form.querySelectorAll('input[required], textarea[required]');
    let isValid = true;

    inputs.forEach(input => {
        if (!input.value.trim()) {
            input.classList.add('border-red-500');
            isValid = false;
        } else {
            input.classList.remove('border-red-500');
        }
    });

    return isValid;
}

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