<?php
require __DIR__ . '/../session.php';
require __DIR__ . '/../db.php';
start_app_session();

header('Content-Type: application/json');

$pdo = getDbConnection();
enforce_session_version($pdo);

$userId = $_SESSION['user_id'] ?? null;
$waitSince = $_SESSION['purchase_wait_since'] ?? null;
$result = false;

if ($userId !== null && $waitSince !== null) {
    $tableExists = $pdo->query("SELECT name FROM sqlite_master WHERE type = 'table' AND name = 'transactions'")->fetch();

    if ($tableExists) {
        // Matches processing.php's session-anchored wait start rather than a sliding
        // "now minus N seconds" window, so this keeps recognizing a completed purchase
        // no matter how long polling has been going on.
        $stmt = $pdo->prepare('
            SELECT 1 FROM transactions
            WHERE user_id = :user_id
              AND created_at >= :wait_since
            LIMIT 1
        ');
        $stmt->execute(['user_id' => (int) $userId, 'wait_since' => $waitSince]);
        $result = (bool) $stmt->fetch();
    }
}

echo json_encode(['result' => $result]);