<?php
session_start();
require_once 'db/config.php';
require_once 'auth-check.php';
require_once 'auth-helpers.php';

if (!can($_SESSION['user_role_id'], 'role', 'delete')) {
    header('Location: index.php?error=access_denied');
    exit;
}

$role_id = $_GET['id'] ?? null;

if (!$role_id) {
    header('Location: roles.php');
    exit;
}

try {
    $pdo = db();

    // Check if any user is assigned to this role
    $stmt = $pdo->prepare('SELECT id FROM users WHERE role_id = ?');
    $stmt->execute([$role_id]);
    if ($stmt->fetch()) {
        header("Location: roles.php?error=role_in_use");
        exit;
    }

    // Delete the role
    $stmt = $pdo->prepare('DELETE FROM roles WHERE id = ?');
    $stmt->execute([$role_id]);

    header("Location: roles.php?success=role_deleted");
    exit;

} catch (PDOException $e) {
    // In a real app, log this error.
    header("Location: roles.php?error=db_error");
    exit;
}