InAppPurchasing::InAppPurchasing(QObject *parent)
    : QObject(parent)
{
    m_myStore = new QInAppStore(this);

    QObject::connect(m_myStore, &QInAppStore::productRegistered, this, &InAppPurchasing::markProductAvailable);
    QObject::connect(m_myStore, &QInAppStore::productUnknown, this, &InAppPurchasing::markProductAsNotAvailable);
    QObject::connect(m_myStore, &QInAppStore::transactionReady, this, &InAppPurchasing::handleTransaction);

    initializeProducts();
}

void InAppPurchasing::initializeProducts()
{
    m_pendingProducts.push_back(QStringLiteral("product_1"));
    m_pendingProducts.push_back(QStringLiteral("product_2"));
    m_pendingProducts.push_back(QStringLiteral("product_3"));
    m_pendingProducts.push_back(QStringLiteral("product_4"));
    m_pendingProducts.push_back(QStringLiteral("product_5"));

    for (const QString& product : qAsConst(m_pendingProducts))
    {
        m_myStore->registerProduct(QInAppProduct::Unlockable, product);
    }
}

void InAppPurchasing::finalizeProductInitialization(const QString& productIdentifier)
{
    qDebug() << "[!!!] finalizeProductInitialization" << productIdentifier;

    bool runRestore = false;

    m_pendingProductsLock.lock();
    runRestore = m_pendingProducts.removeOne(productIdentifier) && m_pendingProducts.isEmpty();
    m_pendingProductsLock.unlock();

    if (runRestore)
    {
        m_myStore->restorePurchases();
    }
}

void InAppPurchasing::markProductAvailable(QInAppProduct* product)
{
    if (!product)
        return;

    qDebug() << "[!!] markProductAvailable";

    finalizeProductInitialization(product->identifier());
}

void InAppPurchasing::markProductAsNotAvailable(QInAppProduct::ProductType productType, const QString &identifier)
{
    Q_UNUSED(productType);

    qDebug() << "[!!] markProductAsNotAvailable";

    finalizeProductInitialization(identifier);
}

void InAppPurchasing::handleTransaction(QInAppTransaction* transaction)
{
    if (!transaction)
        return;

    qDebug() << "[!!] handleTransaction";

    if (transaction->status() == QInAppTransaction::PurchaseApproved
        || transaction->status() == QInAppTransaction::PurchaseRestored)
    {
    }

    transaction->finalize();
}