<?php
require_once(__DIR__ . '/../config.php');

try {
    $pdo = db();
    $sql = "RENAME TABLE `roles` TO `functions`;";
    $pdo->exec($sql);
    echo "Table 'roles' renamed to 'functions' successfully." . PHP_EOL;

    $sql = "RENAME TABLE `user_roles` TO `user_functions`;";
    $pdo->exec($sql);
    echo "Table 'user_roles' renamed to 'user_functions' successfully." . PHP_EOL;

    $sql = "ALTER TABLE `user_functions` CHANGE `role_id` `function_id` INT(11) UNSIGNED NOT NULL;";
    $pdo->exec($sql);
    echo "Column 'role_id' renamed to 'function_id' in 'user_functions' table successfully." . PHP_EOL;

} catch (PDOException $e) {
    echo "Error renaming tables or columns: " . $e->getMessage() . PHP_EOL;
    exit(1);
}