<?php

/**
 * $paymentTest = App_Service_Payment::factory('PayPalStandard', array(
 *     'type' => 'GET_FORM',
 *     'data' => array(
 *         'invoice'   => 12345,
 *         'itemList'  => array(
 *             array('amount' => 2.4, 'item_name' => 'Name Item #1', 'quantity' => 1),
 *             array('amount' => 1.5, 'item_name' => 'Name Item #2', 'quantity' => 3)
 *         )
 *     )
 * ));
 * $form = $paymentTest->getPaymentForm();
 */

class App_Service_Payment_PayPalStandard extends App_Service_Payment_Abstract
{
    const GET_FORM_TYPE = 'GET_FORM';
    const DEFAULT_PAYMENT_TYPE = self::GET_FORM_TYPE;

    protected $_paymentType = self::DEFAULT_PAYMENT_TYPE;
    protected $_logFileName = 'payPalStandard';
    protected $_paymentConfigAlias = 'Service_Payment_PayPalStandard';

    /** @var Qs_Form */
    protected $_paymentForm;

    protected $_invoice;

    function __construct($options = array())
    {
        $invoice = Qs_Array::get($options, 'data[invoice]');
        if ($invoice) {
            $this->_setInvoice($invoice);
        }

        parent::__construct($options);

        if ($this->getPaymentType() == self::GET_FORM_TYPE) {
            return $this->_createPaymentForm();
        } else if ($this->getPaymentType() == self::VERIFY_IPN_TYPE) {
            $this->_verifyIpn();
        }

        return $this;
    }

    protected function _createPaymentForm()
    {
        if (!$this->_paymentForm) {
            $data = $this->getOption('data');

            $this->_paymentForm = new Zend_Form();
            $this->_paymentForm->setAction($this->_getPaymentConfig('actionUrl'));
            $this->_paymentForm->addElement('hidden', 'cmd', array('value' => $this->_getPaymentConfig('cmd')));
            $this->_paymentForm->addElement(
                'hidden',
                'business',
                array('value' => $this->_getPaymentConfig('receiverEmail'))
            );

            $notifyUrl = (!empty($data['notify_url'])) ? $data['notify_url'] : $this->_getPaymentConfig('notifyUrl');
            $this->_paymentForm->addElement('hidden', 'notify_url', array('value' => $notifyUrl));

            if ($this->_getPaymentConfig('upload')) {
                $this->_paymentForm->addElement('hidden', 'upload', array('value' => true));
            }

            $this->_paymentForm->addElement('hidden', 'invoice', array('value' => $this->_invoice));

            foreach ($this->_getItemList() as $key => $item) {
                foreach ($item as $name => $value) {
                    $this->_paymentForm->addElement('hidden', $name . '_' . ($key + 1), array('value' => $value));
                }
            }

            if ($data['shipping']) {
                $this->_paymentForm->addElement('hidden', 'handling_cart', array('value' => $data['shipping']));
            }

            if ($data['tax']) {
                $this->_paymentForm->addElement('hidden', 'tax_cart', array('value' => $data['tax']));
            }

            if (Qs_Array::get($data, 'promo') || Qs_Array::get($data, 'giftCard')) {
                $discount = Zend_Locale_Math::Add($data['promo'], $data['giftCard'], 2);
                $this->_paymentForm->addElement('hidden', 'discount_amount_cart', array('value' => $discount));
            }

            $this->_paymentForm->addElement('hidden', 'address_override', array('value' => true));

            if (!empty($data['custom'])) {
                foreach ($data['custom'] as $field => $value) {
                    $this->_paymentForm->addElement('hidden', $field, array('value' => $value));
                }
            }

            $this->_paymentForm->addElement(
                'submit',
                'submit',
                array('label' => 'Proceed to Checkout', 'attribs' => array('class' => 'btn'))
            );
        }

        return $this;
    }

    public function getPaymentForm()
    {
        return $this->_paymentForm;
    }

    protected function _setInvoice($invoice)
    {
        $this->_invoice = $invoice;
    }
}