<?php

class Craig_Tco_Model_Observer extends Mage_Adminhtml_Block_Template{

    public function issue_creditmemo_refund(Varien_Object $payment) {

        $refund = Mage::getStoreConfig('payment/tco/refund');

        if ($refund == '1') {
            $creditmemo = $payment->getCreditmemo()->getOrder()->getData();
            $creditmemo_amount = $payment->getCreditmemo()->getData();
            $creditmemo_comment = $payment->getCreditmemo()->getCommentsCollection()->toArray();

            if(isset($creditmemo_comment['items'][0]['comment'])) {
                $comment = $creditmemo_comment['items'][0]['comment'];
            } else {
                $comment = 'Refund issued by seller';
            }

            $username = Mage::getStoreConfig('payment/tco/username');
            $password = Mage::getStoreConfig('payment/tco/password');
            $auth = 'Basic ' . base64_encode($username . ':' . $password);

            $data = array();
            $data['sale_id'] = $creditmemo['ext_order_id'];
            $data['comment'] = $comment;
            $data['category'] = '5';
            $data['amount'] = $creditmemo_amount['grand_total'];
            $data['currency'] = 'vendor';

            $headers = array(
                'Authorization: ' . $auth,
                'Accept: application/json'
            );

            $url = 'https://www.2checkout.com/api/sales/refund_invoice';

            $config = array(
                'timeout'    => 30
            );

            try {
                $http = new Varien_Http_Adapter_Curl();
                $http->setConfig($config);
                $http->write(Zend_Http_Client::POST, $url, '1.1', $headers, $data);
                $response = $http->read();
            } catch (Exception $e) {
                die($e->getMessage());
            }
        }
    }
}
?>