// Shared functions
function formatDate(dateString) {
    const options = { year: 'numeric', month: 'long', day: 'numeric' };
    return new Date(dateString).toLocaleDateString('tr-TR', options);
}

function calculateAge(birthDate) {
    const today = new Date();
    const birthDateObj = new Date(birthDate);
    let age = today.getFullYear() - birthDateObj.getFullYear();
    const monthDiff = today.getMonth() - birthDateObj.getMonth();
    
    if (monthDiff < 0 || (monthDiff === 0 && today.getDate() < birthDateObj.getDate())) {
        age--;
    }
    
    return age;
}

// Check authentication
function checkAuth(requiredRole, redirectTo = 'index.html') {
    // In a real app, this would check server-side authentication
    const role = localStorage.getItem('role');
    if (!role || (requiredRole && role !== requiredRole)) {
        window.location.href = redirectTo;
    }
}

// Initialize tooltips
function initTooltips() {
    const tooltipTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="tooltip"]'));
    tooltipTriggerList.map(function (tooltipTriggerEl) {
        return new bootstrap.Tooltip(tooltipTriggerEl);
    });
}

// Initialize after DOM is loaded
document.addEventListener('DOMContentLoaded', function() {
    initTooltips();
    feather.replace();
});