from flask import Flask, Markup

class AnalyticsEngines(object):

    @staticmethod
    def gosquared(uid):

        return """<script>
            !function(g,s,q,r,d){r=g[r]=g[r]||function(){(r.q=r.q||[]).push(
            arguments)};d=s.createElement(q);q=s.getElementsByTagName(q)[0];
            d.src='//d1l6p2sc9645hc.cloudfront.net/tracker.js';q.parentNode.
            insertBefore(d,q)}(window,document,'script','_gs');

            _gs('%s');
        </script>""" % (uid)

    @staticmethod
    def chartbeat(uid, domain):

        return """<script type="text/javascript">
            var _sf_async_config={};
            /** CONFIGURATION START **/
            _sf_async_config.uid = %s; /** CHANGE THIS **/
            _sf_async_config.domain = "%s"; /** CHANGE THIS **/
            /** CONFIGURATION END **/
            (function(){
                function loadChartbeat() {
                    window._sf_endpt=(new Date()).getTime();
                    var e = document.createElement("script");
                    e.setAttribute("language", "javascript");
                    e.setAttribute("type", "text/javascript");
                    e.setAttribute('src', '//static.chartbeat.com/js/chartbeat.js');
                    document.body.appendChild(e);
                }
                var oldonload = window.onload;
                window.onload = (typeof window.onload != "function") ?
                loadChartbeat : function() { oldonload(); loadChartbeat(); };
            })();
          </script>""" % (uid, domain)

    @staticmethod
    def piwik(piwik_url, siteid):

        return """<script type="text/javascript">
            var _paq = _paq || [];
            (function(){
                var u=(("https:" == document.location.protocol) ? "https://%s/" : "http://%s/");
                _paq.push(['setSiteId', %s]);
                _paq.push(['setTrackerUrl', u+'piwik.php']);
                _paq.push(['trackPageView']);
                _paq.push(['enableLinkTracking']);
                var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.type='text/javascript'; g.defer=true; g.async=true; g.src=u+'piwik.js';
                s.parentNode.insertBefore(g,s);
            })();
        </script>""" % (piwik_baseurl, piwik_baseurl, piwik_siteid)

    @staticmethod
    def gauges(gauges_siteid):

      return """<script type="text/javascript">
          var _gauges = _gauges || [];
          (function() {
              var t   = document.createElement('script');
              t.type  = 'text/javascript';
              t.async = true;
              t.id    = 'gauges-tracker';
              t.setAttribute('data-site-id', '%s');
              t.src = '//secure.gaug.es/track.js';
              var s = document.getElementsByTagName('script')[0];
              s.parentNode.insertBefore(t, s);
          })();
      </script>""" % (gauges_siteid)

    @staticmethod
    def google_analytics(google_analytics_id):

      return """<script type="text/javascript">
            (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
            (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
            m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
            })(window,document,'script','//www.google-analytics.com/analytics.js','ga');

            ga('create', '%s', 'auto');
            ga('send', 'pageview');

            </script>""" % (google_analytics_id)

class Analytics(object):

    def __init__ (self, app=None):

        self.app = app
        self.tracking_code = []

        if app is not None:

        	  self.init_app(app)

    def init_app(self, app, add_context_processor=False):

        if 'GOOGLE_ANALYTICS_ID' in app.config:

            self.tracking_code.append(AnalyticsEngines.google_analytics(app.config['GOOGLE_ANALYTICS_ID']))

        if 'GAUGES_SITEID' in app.config:

            self.tracking_code.append(AnalyticsEngines.gauges(app.config['GAUGES_SITEID']))

        if (('PIWIK_BASEURL' in app.config) and
            ('PIWIK_SITEID' in app.config)):

            self.tracking_code.append(AnalyticsEngines.piwik(app.config['PIWIK_BASEURL'],
                                                             app.config['PIWIK_SITEID']))

        if (('CHARTBEAT_UID' in app.config) and
            ('CHARTBEAT_DOMAIN' in app.config)):

            self.tracking_code.append(AnalyticsEngine.chartbeat(app.config['CHARTBEAT_UID'],
                                                                app.config['CHARTBEAT_DOMAIN']))


        if 'GOSQUARED_ID' in app.config:

            self.tracking_code.append(AnalyticsEngine.gosquared(app.config['GOSQUARED_ID']))

        if add_context_processor:

            app.context_processor(self._context_processor)

    @property
    def code(self):

        return Markup('\n'.join(self.tracking_code))

    def _context_processor(self):

        return dict(analytics=self.code)