<?php
require_once 'includes/config.php';
require_once 'includes/functions.php';
require_once 'includes/db.php';
require_once 'includes/auth.php';

$auth = new Auth();

// If user is already logged in, redirect to dashboard
if ($auth->isLoggedIn()) {
    redirectTo('dashboard.php');
}

try {
    $db = Database::getInstance();
    $result = $db->query("SELECT COUNT(*) as count FROM users");
    
    if (!$result) {
        error_log("Database error: " . $db->getLastError());
        die("An error occurred while checking the database.");
    }
    
    $row = $result->fetch_assoc();

    // If no users exist, redirect to register page for initial admin setup
    if ($row['count'] === '0') {
        redirectTo('register.php');
    } else {
        // Otherwise redirect to login page
        redirectTo('login.php');
    }
} catch (Exception $e) {
    error_log("Error in index.php: " . $e->getMessage());
    die("An error occurred while accessing the application. Please try again later.");
}