<?php

namespace Stripe;

/**
 * <code>Application Fee Refund</code> objects allow you to refund an application
 * fee that has previously been created but not yet refunded. Funds will be
 * refunded to the Stripe account from which the fee was originally collected.
 *
 * Related guide: <a
 * href="https://stripe.com/docs/connect/destination-charges#refunding-app-fee">Refunding
 * Application Fees</a>.
 *
 * @property string $id Unique identifier for the object.
 * @property string $object String representing the object's type. Objects of the same type share the same value.
 * @property int $amount Amount, in %s.
 * @property null|string|\Stripe\BalanceTransaction $balance_transaction Balance transaction that describes the impact on your account balance.
 * @property int $created Time at which the object was created. Measured in seconds since the Unix epoch.
 * @property string $currency Three-letter <a href="https://www.iso.org/iso-4217-currency-codes.html">ISO currency code</a>, in lowercase. Must be a <a href="https://stripe.com/docs/currencies">supported currency</a>.
 * @property string|\Stripe\ApplicationFee $fee ID of the application fee that was refunded.
 * @property \Stripe\StripeObject $metadata Set of key-value pairs that you can attach to an object. This can be useful for storing additional information about the object in a structured format.
 */
class ApplicationFeeRefund extends ApiResource
{
    const OBJECT_NAME = 'fee_refund';

    use ApiOperations\Update {
        save as protected _save;
    }

    /**
     * @return string the API URL for this Stripe refund
     */
    public function instanceUrl()
    {
        $id = $this['id'];
        $fee = $this['fee'];
        if (!$id) {
            throw new Exception\UnexpectedValueException(
                'Could not determine which URL to request: ' .
                "class instance has invalid ID: {$id}",
                null
            );
        }
        $id = Util\Util::utf8($id);
        $fee = Util\Util::utf8($fee);

        $base = ApplicationFee::classUrl();
        $feeExtn = \urlencode($fee);
        $extn = \urlencode($id);

        return "{$base}/{$feeExtn}/refunds/{$extn}";
    }

    /**
     * @param null|array|string $opts
     *
     * @return ApplicationFeeRefund the saved refund
     */
    public function save($opts = null)
    {
        return $this->_save($opts);
    }
}
