class Get
{
    /**
     * AmazonPay module object
     *
     * @var AmazonPay
     */
    private $module;

    /**
     * Amazon Pay order object
     *
     * @var OrderMeta
     */
    private $order;

    /**
     * Sets `$module` member var with dependency injection.
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param AmazonPay $module
     * @param OrderMeta $order
     * @return void
     */
    public function __construct(AmazonPay $module, OrderMeta $order) {
        $this->module = $module;
        $this->order = $order;
    }

    /**
     * Gets a Refund
     *
     * @see https://amazonpaycheckoutintegrationguide.s3.amazonaws.com/amazon-pay-api-v2/refund.html#get-refund
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param string $refundId Refund ID
     * @return array
     * @throws InvalidArgumentException Thrown by `getAmazonClient`.
     */
    public function get($refundId) {
        try {
            $client = $this->module->getAmazonClient();
            $result = $client->getRefund($refundId);
            if ($this->module->errors->hasError($result)) {
                return $this->module->errors->getAmzErrorResponse($result);
            }
        } catch (\Exception $e) {
            return $this->module->errors->getErrorResponse(
                GenericErrorStore::AMAZON_PAY_SDK_CLIENT_EXCEPTION,
                [$e->getMessage()]
            );
        }

        $oldRefundState = $this->order->getRefundState();
        $response = json_decode($result['response'], true);
        $details = $response['statusDetails'];
        $this->order->updateRefundState(
            new State(
                $details['state'],
                $details['reasonCode'],
                $details['reasonDescription']
            )
        );

        if ($details['state'] !== $oldRefundState->getState() && !empty(State::STATE_TO_LOG_ACTION[$details['state']])) {
            (new Logger())->logApiResponse(new Log(
                $this->order->getChargePermissionId(),
                State::STATE_TO_LOG_ACTION[$details['state']],
                Log::RESPONSE_OK,
                $details['state'] === State::REFUNDED ? $this->order->getMostRecentTransactionAmount() : null
            ));
        }

        return $result;
    }
}