<?php
/**
 * app/modules/connections/delete.php
 *
 * Loescht eine Verbindung (AJAX-POST bevorzugt, GET-Fallback fuer Redirects).
 */

$isPost = ($_SERVER['REQUEST_METHOD'] ?? '') === 'POST';
$connectionId = (int)($_POST['id'] ?? $_GET['id'] ?? 0);

if ($connectionId <= 0) {
    if ($isPost) {
        header('Content-Type: application/json; charset=utf-8');
        http_response_code(400);
        echo json_encode(['success' => false, 'message' => 'Ungueltige Verbindungs-ID']);
        exit;
    }
    $_SESSION['error'] = 'Ungueltige Verbindungs-ID';
    header('Location: ?module=connections&action=list');
    exit;
}

$connection = $sql->single(
    "SELECT id FROM connections WHERE id = ?",
    "i",
    [$connectionId]
);

if (!$connection) {
    if ($isPost) {
        header('Content-Type: application/json; charset=utf-8');
        http_response_code(404);
        echo json_encode(['success' => false, 'message' => 'Verbindung nicht gefunden']);
        exit;
    }
    $_SESSION['error'] = 'Verbindung nicht gefunden';
    header('Location: ?module=connections&action=list');
    exit;
}

$rows = $sql->set(
    "DELETE FROM connections WHERE id = ?",
    "i",
    [$connectionId]
);

if ($isPost) {
    header('Content-Type: application/json; charset=utf-8');
    if ($rows > 0) {
        echo json_encode(['success' => true, 'message' => 'Verbindung geloescht']);
    } else {
        http_response_code(500);
        echo json_encode(['success' => false, 'message' => 'Verbindung konnte nicht geloescht werden']);
    }
    exit;
}

if ($rows > 0) {
    $_SESSION['success'] = 'Verbindung geloescht';
} else {
    $_SESSION['error'] = 'Verbindung konnte nicht geloescht werden';
}

header('Location: ?module=connections&action=list');
exit;