<?php
// api/delete_user.php
header('Content-Type: application/json');
require_once '../db/config.php';
session_start();

// Authentication and Authorization check
if (!isset($_SESSION['user_id']) || $_SESSION['user_role'] !== 'super_admin') {
    echo json_encode(['success' => false, 'message' => 'Unauthorized']);
    exit;
}

if (empty($_POST['id'])) {
    echo json_encode(['success' => false, 'message' => 'User ID is required.']);
    exit;
}

$id = filter_input(INPUT_POST, 'id', FILTER_SANITIZE_NUMBER_INT);

// Prevent super admin from deleting themselves
if ($id == $_SESSION['user_id']) {
    echo json_encode(['success' => false, 'message' => 'You cannot delete your own account.']);
    exit;
}

try {
    // Optional: Check if user has related records (e.g., assets) before deleting
    // For now, we rely on the database foreign key constraint (ON DELETE SET NULL)

    $stmt = db()->prepare("DELETE FROM users WHERE id = ?");
    $stmt->execute([$id]);

    if ($stmt->rowCount() > 0) {
        echo json_encode(['success' => true, 'message' => 'User deleted successfully.']);
    } else {
        echo json_encode(['success' => false, 'message' => 'User not found or could not be deleted.']);
    }

} catch (PDOException $e) {
    echo json_encode(['success' => false, 'message' => 'Database error: ' . $e->getMessage()]);
}
?>