// Shared utility functions
const API_BASE_URL = 'http://localhost:3000/api';

async function fetchWithAuth(url, options = {}) {
    const token = localStorage.getItem('token');
    if (token) {
        options.headers = {
            ...options.headers,
            'Authorization': `Bearer ${token}`
        };
    }
    const response = await fetch(`${API_BASE_URL}${url}`, options);
    if (!response.ok) {
        throw new Error(`HTTP error! status: ${response.status}`);
    }
    return response.json();
}

function redirectTo(path) {
    window.location.href = path;
}

function showToast(message, type = 'success') {
    const toast = document.createElement('div');
    toast.className = `fixed top-4 right-4 px-4 py-2 rounded-md shadow-lg text-white ${
        type === 'success' ? 'bg-green-500' : 'bg-red-500'
    }`;
    toast.textContent = message;
    document.body.appendChild(toast);
    
    setTimeout(() => {
        toast.classList.add('opacity-0', 'transition-opacity', 'duration-300');
        setTimeout(() => toast.remove(), 300);
    }, 3000);
}

// Auth state management
function checkAuth() {
    const token = localStorage.getItem('token');
    const user = localStorage.getItem('user');
    
    if (token && user) {
        const parsedUser = JSON.parse(user);
        if (parsedUser.role === 'admin') {
            redirectTo('/admin-dashboard.html');
        } else {
            redirectTo('/dashboard.html');
        }
    }
}

// Initialize auth check on pages that require it
if (document.body.classList.contains('auth-required')) {
    document.addEventListener('DOMContentLoaded', checkAuth);
}