// url of the sript
var scriptUrl = document.getElementById( 'uwm_cm_integration' );

// get lineup key, repo, and host from script url
var dealerCode = getParameterByName( 'd', scriptUrl.src );
var repo = getParameterByName( 'r', scriptUrl.src );
var hostName = extractHostname( scriptUrl.src );

// get ymm from parent window
var ymm = getParameterByName('ymm');

// create iframe url
var iframeUrl = '//' + hostName + '/' + repo + '/front?d=' + dealerCode + '&type=integration';
iframeUrl += ( ymm ? '&ymm=' + ymm : '' );

// main container element
var uwmIframeContainer = document.getElementById('uwm_cm');

// create pym script and add it to the dom
var pymScript = document.createElement('script');
pymScript.src = '//' + hostName + '/cishared/js/pym/pym.js';

// setup iframe
uwmIframeContainer.innerHTML = "<div data-pym-src='" + iframeUrl + "' id='uwm_pym_iframe'></div>";

// append pym script to main container
uwmIframeContainer.appendChild( pymScript );

/**
 * Get param from URL by name
 *
 * @param name of the param you are looking for
 * @param url to look for the param in by name
 *
 * @return String value of the param found
 */
function getParameterByName( name, url ) {
    if (!url) url = window.location.href;
    name = name.replace(/[\[\]]/g, "\\$&");
    var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
        results = regex.exec(url);
    if (!results) return null;
    if (!results[2]) return '';
    return decodeURIComponent(results[2].replace(/\+/g, " "));
}

/**
 * Get host from url string
 *
 * @param url to look for the param in by name
 *
 * @return String value of the host found
 */
function extractHostname( url ) {
    var tmp = document.createElement ('a');
    tmp.href = url;
    return tmp.hostname;
}