(function () {
    function getXpertString() {
        var ind = document.getElementById('Industry'),
        reg = document.getElementById('Region'),
        sol = document.getElementById('CustomerSolution'),
        msg = '';
        
        if (ind && ind.value) {
            msg += ind.value;
        } else {
            msg += 'Undefined';
        }
        
        if (reg && reg.value) {
            msg += '-' + reg.value;
        } else {
            msg += '-Undefined';
        }
        
        if (sol && sol.value) {
            msg += '-' + sol.value;
        } else {
            msg += '-Undefined';
        }
        
        return msg;
    };
    
    var Main = {
        
        
        /**
         * Match and rules lookup table containing custom functions to be bound
         *   to DOM elements based on specific class names
         */
        lookup:{
            'ga-thumb':{
                'on':'click',
                'action':function () {
                    var elName = this.textContent || this.innerText;
                    pageTracker._trackEvent('Homepage', 'Thumbnail click', elName);
                }
            },
            'ga-xengine-save':{
                'on':'click',
                'action':function () {
                    var msg = getXpertString();
                    pageTracker._trackEvent('Xpertise engine', 'Save', msg);
                }
            },
            'ga-xengine-print':{
                'on':'click',
                'action':function () {
                    var msg = getXpertString();
                    pageTracker._trackEvent('Xpertise engine', 'Print', msg);
                }
            },
            'ga-xengine-search':{
                'on':'click',
                'action':function () {
                    var msg = getXpertString();
                    pageTracker._trackEvent('Xpertise engine', 'Search', msg);
                }
            },
            'ga-xengine-help':{
                'on':'click',
                'action':function () {
                    pageTracker._trackEvent('Xpertise engine', 'Help');
                }
            },
            'ga-pdf':{
                'on':'click',
                'action':function () {
                    var url = document.location.href,
                    elName = this.title,
                    sections;
                    url = url.split('/').slice(4).join('-');
                    sections = url.substring(0, url.indexOf('.'));
                    pageTracker._trackEvent(sections, 'Download pdf', elName);
                }
            },
            'ga-hero-thumb':{
                'on':'click',
                'action':function () {
                    var url = document.location.href,
                    elName = this.title,
                    sections;
                    url = url.split('/').slice(4),
                    section = url[0];
                    pageTracker._trackEvent(section, 'Thumbnail click', elName);
                }
            },
            'ga-ihtml':{
                'on':'click',
                'action':function () {
                    var elName = this.textContent || this.innerText;
                    pageTracker._trackEvent('Investor Relations-Annual Reports','Interactive html', elName);
                }
            },
            'ga-generic-form-confirmation':{
                'on':'load',
                'action':function () {
                    pageTracker._trackPageview(document.location.pathname + '/confirmation');
                }
            },
            'ga-contact-us':{
                'on':'click',
                'action':function () {
                    pageTracker._trackEvent('Contact Us','Additional Information Pane');
                }
            },
            'ga-print-results':{
                'on':'click',
                'action':function () {
                    var url = document.location.href,
                    url = url.split('/').slice(4),
                    sections;
                    section = url[0];
                    pageTracker._trackEvent(section, 'Print', document.location);
                }
            },
            'ga-video-play':{
                'on':'click',
                'action':function () {
                    var url = document.location.href,
                    elName = this.title,
                    url = url.split('/').slice(4),
                    sections;
                    section = url[0];
                    pageTracker._trackEvent(section,'Video Play', elName);
                }
            },
            'ga-video-pause':{
                'on':'click',
                'action':function () {
                    var url = document.location.href,
                    elName = this.title,
                    url = url.split('/').slice(4),
                    sections;
                    section = url[0];
                    pageTracker._trackEvent(section,'Video Pause', elName);
                }
            },
            'ga-video-completed':{
                'on':'click',
                'action':function () {
                    var url = document.location.href,
                    elName = this.title,
                    url = url.split('/').slice(4),
                    sections;
                    section = url[0];
                    pageTracker._trackEvent(section,'Video Completed', elName);
                }
            }
        },
        
        
        /**
         * Main initialisation function that binds the GA Wrapper to elements
         *   in the DOM
         * @param {Object} data Contains data to be passed to GA
         */
        init:function () {
            var elems = document.getElementsByTagName('*'),
            lookup = this.lookup,
            classes, c, el, i, j;
            for (i = 0; elems[i]; i += 1) {
                el = elems[i];
                classes = el.className.split(' ');
                for (j = 0; classes[j]; j += 1) {
                    c = classes[j];
                    if (lookup[c]) {
                        if (lookup[c].on === 'load') {
                            lookup[c].fn.call(this);
                        } else {
                            YAHOO.util.Event.on(el, lookup[c].on, lookup[c].action);
                        }
                    }
                }
            }
        }
    }
    
    
    /*
     * Set global scope
     */
    if (typeof GoogleAnalyticsWrapper === 'undefined' || !GoogleAnalyticsWrapper) {
        GoogleAnalyticsWrapper = Main;
    }
})();
GoogleAnalyticsWrapper.init();