document.addEventListener('DOMContentLoaded', function () {
    // Smooth scroll for navigation links
    const navLinks = document.querySelectorAll('.nav-link');
    navLinks.forEach(link => {
        if (link.hash !== '') {
            link.addEventListener('click', function (e) {
                e.preventDefault();
                const target = document.querySelector(this.hash);
                if (target) {
                    window.scrollTo({
                        top: target.offsetTop - 70, // Adjust for fixed navbar
                        behavior: 'smooth'
                    });
                }
            });
        }
    });

    // Contact form submission
    const contactForm = document.getElementById('contactForm');
    const toastContainer = document.getElementById('notificationToast');
    const toastBody = document.querySelector('#notificationToast .toast-body');
    const toast = new bootstrap.Toast(toastContainer);

    if (contactForm) {
        contactForm.addEventListener('submit', function (e) {
            e.preventDefault();
            const formData = new FormData(this);
            const submitButton = this.querySelector('button[type="submit"]');
            submitButton.disabled = true;
            submitButton.innerHTML = '<span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span> Sending...';

            fetch('contact_handler.php', {
                method: 'POST',
                body: formData
            })
            .then(response => response.json())
            .then(data => {
                if (data.success) {
                    toastBody.textContent = 'Message sent successfully! Thank you.';
                    toastContainer.classList.remove('bg-danger');
                    toastContainer.classList.add('bg-success');
                    contactForm.reset();
                } else {
                    toastBody.textContent = data.error || 'An unknown error occurred.';
                    toastContainer.classList.remove('bg-success');
                    toastContainer.classList.add('bg-danger');
                }
                toast.show();
            })
            .catch(error => {
                toastBody.textContent = 'A network error occurred. Please try again.';
                toastContainer.classList.remove('bg-success');
                toastContainer.classList.add('bg-danger');
                toast.show();
            })
            .finally(() => {
                submitButton.disabled = false;
                submitButton.innerHTML = 'Send Message';
            });
        });
    }
});