var http = require('http');

var xml2js = require('xml2js');

function usps(username) {

this.username = username;

}

usps.prototype.getShippingInfo = function (trackingNumber, callback) {

var path = '<TrackRequest USERID="'+this.userName+'">'+'<TrackID ID="'+trackingNumber+'"></TrackID></TrackRequest>';

sendRequest(path, callback);

}

usps.prototype.getMultipleShippingInfo = function (trackingNumberArr, callback) {

var path = '<TrackRequest USERID="'+this.userName+'">';

for (var i = 0; i < trackingNumberArr.length; i++) {

path += '<TrackID ID="'+trackingNumberArr[i]+'"></TrackID>';

}

path += '</TrackRequest>';

sendRequest(path, callback);

}

function sendRequest(path, callback) {

//production.shippingapis.com TODO change

var reqObj = {

host: 'testing.shippingapis.com',

port: 80,

path: '/ShippingAPITest.dll?API=TrackV2&XML='+encodeURIComponent(path),

headers: {

'Content-Type': 'text/xml'

}

};

http.get(reqObj, function(res) {

var str = '';

res.on('data', function(data) {

str += data;

});

res.on("end", function() {

var parser = new xml2js.Parser();

parser.parseString(str, function(err, result){

if (!err) {

if (result.TrackResponse) {

//console.log(result.TrackResponse);

callback(result.TrackResponse);

}

} else {

console.log("Err first: " + err);

callback(err);

}

});

});

}).on('error', function(e) {

console.log("Err second: " + e.message);

callback(e.message);

});

}

module.exports = usps;