// Utility functions for API calls
async function apiCall(endpoint, method = 'GET', data = null) {
    const options = {
        method: method,
        headers: {
            'Content-Type': 'application/json',
        }
    };

    if (data) {
        options.body = JSON.stringify(data);
    }

    try {
        const response = await fetch(endpoint, options);
        if (!response.ok) {
            throw new Error(`API Error: ${response.statusText}`);
        }
        return await response.json();
    } catch (error) {
        console.error('API call failed:', error);
        showNotification('Errore nella richiesta', 'error');
        throw error;
    }
}

// Notification system
function showNotification(message, type = 'info') {
    const notification = document.createElement('div');
    notification.className = `notification notification-${type}`;
    notification.textContent = message;
    notification.style.cssText = `
        position: fixed;
        top: 20px;
        right: 20px;
        padding: 12px 20px;
        background-color: ${type === 'error' ? '#D32F2F' : '#1976D2'};
        color: white;
        border-radius: 4px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.2);
        z-index: 2000;
        animation: slideIn 0.3s ease-in-out;
    `;

    document.body.appendChild(notification);
    setTimeout(() => notification.remove(), 3000);
}

// Format currency
function formatCurrency(value) {
    return new Intl.NumberFormat('it-IT', {
        style: 'currency',
        currency: 'EUR'
    }).format(value);
}

// Format date
function formatDate(dateString) {
    const date = new Date(dateString);
    return date.toLocaleDateString('it-IT');
}

// Initialize page animations
document.addEventListener('DOMContentLoaded', function() {
    // Add smooth scrolling
    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
        anchor.addEventListener('click', function(e) {
            e.preventDefault();
            const target = document.querySelector(this.getAttribute('href'));
            if (target) {
                target.scrollIntoView({ behavior: 'smooth' });
            }
        });
    });

    // Add keyboard shortcuts
    document.addEventListener('keydown', function(e) {
        // Close modals with Escape
        if (e.key === 'Escape') {
            document.querySelectorAll('.modal.show').forEach(modal => {
                modal.classList.remove('show');
            });
        }
    });

    // Initialize tooltips
    document.querySelectorAll('[title]').forEach(element => {
        element.style.cursor = 'help';
    });
});

// Add CSS animation for notifications
const style = document.createElement('style');
style.textContent = `
    @keyframes slideIn {
        from {
            transform: translateX(400px);
            opacity: 0;
        }
        to {
            transform: translateX(0);
            opacity: 1;
        }
    }

    .material-icons {
        font-family: 'Material Icons';
        font-weight: normal;
        font-style: normal;
        font-size: 24px;
        display: inline-block;
        line-height: 1;
        text-transform: none;
        letter-spacing: normal;
        word-wrap: normal;
        white-space: nowrap;
        direction: ltr;
    }
`;
document.head.appendChild(style);