class @GoogleAnalytics

    @load: ->
        # Load the analytics code
        window['GoogleAnalyticsObject'] = 'ga'
        window['ga'] = window['ga'] || ->
            (window['ga'].q = window['ga'].q || []).push arguments
        window['ga'].l = 1 * new Date()

        # Add the script
        googleScript = document.createElement("script")
        googleScript.async = 1
        googleScript.src = '//www.google-analytics.com/analytics.js'

        firstScript = document.getElementsByTagName("script")[0]
        firstScript.parentNode.insertBefore googleScript, firstScript

        # Create the analytics
        ga 'create', GoogleAnalytics.analyticsId(), 'auto'

        # You can enable additional modules like so
        # ga 'require', 'displayfeatures'

        if typeof Turbolinks isnt 'undefined' and Turbolinks.supported
            document.addEventListener "page:change", GoogleAnalytics.trackPageview, true
        else
            GoogleAnalytics.trackPageview()

    @trackPageview: (url) ->
        unless GoogleAnalytics.isLocalRequest()
            if url
                ga 'send', 'pageview', url
            else
                ga 'send', 'pageview'

    @isLocalRequest: ->
        document.domain.indexOf('dev') isnt -1

    @analyticsId: ->
        '[change-this-to-analytics-id]'

GoogleAnalytics.load()