class GetBuyer extends ErrorStore
{

    const INVALID_TOKEN = 'InvalidToken';

    /**
     * AmazonPay module object
     *
     * @var AmazonPay
     */
    private $module;

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

    /**
     * Gets buyer info post sign-in
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param string $token
     * @return array
     * @throws InvalidArgumentException Thrown by `getAmazonClient`.
     */
    public function get($token) {
        try {
            $client = $this->module->getAmazonClient();
            $result = $client->getBuyer($token);
            if ($this->module->errors->hasError($result)) {
                return $this->module->errors->getAmzErrorResponse($result, $this);
            }
        } catch (\Exception $e) {
            return $this->module->errors->getErrorResponse(
                GenericErrorStore::AMAZON_PAY_SDK_CLIENT_EXCEPTION,
                [$e->getMessage()]
            );
        }

        return $result;
    }

    /**
     * Populates error store
     *
     * @see https://amazonpaycheckoutintegrationguide.s3.amazonaws.com/amazon-pay-api-v2/buyer.html#error-codes
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return void
     * @throws InvalidArgumentException Thrown if duplicate errorcodes exist.
     */
    public function populate() {
        $this->addError(new GenericError(
            self::INVALID_TOKEN,
            $this->getConstantNameByValue(self::INVALID_TOKEN),
            400,
            function ($message) {
                return $message;
            },
            $this->getErrorCodeMap()[parent::INTERNAL_SERVER_ERROR]->message
        ));
    }
}