var Paypal = require('paypal-express-checkout');
// debug = optional, defaults to false, if true then paypal's sandbox url is used
// paypal.init('some username', 'some password', 'signature', 'return url', 'cancel url', debug);
var paypal = Paypal.init('username', 'password', 'signature', 'http://www.example.com/return', 'http://www.example.com/cancel', true);

// Localization (OPTIONAL): https://developer.paypal.com/docs/classic/api/locale_codes/
// paypal.locale = 'SK';
// or
// paypal.locale = 'en_US';

// checkout
// requireAddress = optional, defaults to false
// paypal.pay('Invoice number', amount, 'description', 'currency', requireAddress, customData, callback);
// paypal.pay('20130001', 123.23, 'iPad', 'EUR', function(err, url) {
// or with "requireAddress": true
paypal.pay('20130001', 123.23, 'iPad', 'EUR', true, ['custom', 'data'], function(err, url) {
	if (err) {
		console.log(err);
		return;
	}

	// redirect to paypal webpage
	response.redirect(url);
});

// result in GET method
// paypal.detail('token', 'PayerID', callback);
// or
// paypal.detail(totaljs.controller, callback);

paypal.detail('EC-788441863R616634K', '9TM892TKTDWCE', function(err, data, invoiceNumber, price, custom_data_array) {

	// custom_data_array {String Array} - supported in +v1.6.3

	if (err) {
		console.log(err);
		return;
	}

	// data.success == {Boolean}

	if (data.success)
		console.log('DONE, PAYMENT IS COMPLETED.');
	else
		console.log('SOME PROBLEM:', data);

	/*
	data (object) =
	{ TOKEN: 'EC-35S39602J3144082X',
	  TIMESTAMP: '2013-01-27T08:47:50Z',
	  CORRELATIONID: 'e51b76c4b3dc1',
	  ACK: 'Success',
	  VERSION: '52.0',
	  BUILD: '4181146',
	  TRANSACTIONID: '87S10228Y4778651P',
	  TRANSACTIONTYPE: 'expresscheckout',
	  PAYMENTTYPE: 'instant',
	  ORDERTIME: '2013-01-27T08:47:49Z',
	  AMT: '10.00',
	  TAXAMT: '0.00',
	  CURRENCYCODE: 'EUR',
	  PAYMENTSTATUS: 'Pending',
	  PENDINGREASON: 'multicurrency',
	  REASONCODE: 'None' };
	*/

});