import {Injectable} from '@angular/core';
import {Http, Response, Headers, RequestOptions, URLSearchParams} from '@angular/http';
import {Observable}     from 'rxjs/Observable';
import 'rxjs/add/observable/of';
import 'rxjs/add/operator/do';
import 'rxjs/add/operator/share';
import {Location} from '@angular/common';

import {StringUtils} from '../string-utils.class';
import {EnvProperties} from '../properties/env-properties';


@Injectable()
export class PiwikService {
    private piwikbaseUrl:string = "";
    constructor(private http: Http, private location: Location ) {}

    trackView (properties:EnvProperties, title):any {

      var ua = this.getUserAgent();
      var referrer = this.getReferrer();
      if(typeof location !== 'undefined'){
            var url = properties.piwikBaseUrl+"&rec=1&url="+StringUtils.URIEncode(location.href)+"&action_name="+StringUtils.URIEncode(title)+
            ((ua != null && ua.length > 0)?('&ua='+StringUtils.URIEncode(ua)):'')+
            ((referrer != null && referrer.length > 0)?('&urlref='+StringUtils.URIEncode(referrer)):'');
            console.log("Piwik - View: " + url);

            return this.http.get( url);
                          // .do(request => console.info("Piwik request completed" ));

      }
    }
    trackDownload (properties:EnvProperties, downloadURL):any {
      var ua = this.getUserAgent();
      var referrer = this.getReferrer();
      var url = properties.piwikBaseUrl+"&rec=1&url="+StringUtils.URIEncode(downloadURL)+"&download="+StringUtils.URIEncode(downloadURL)+
      ((ua != null && ua.length > 0)?('&ua='+StringUtils.URIEncode(ua)):'')+
      ((referrer != null && referrer.length > 0)?('&urlref='+StringUtils.URIEncode(referrer)):'');
      console.log("Piwik - trackDownload: "+url);

      return this.http.get( url)
                    .do(request => console.info("Piwik request completed" ));

    }
    private getUserAgent(){
      if (typeof navigator !== 'undefined') {
        console.log("navigator.userAgent:" + navigator.userAgent);
        return navigator.userAgent;

      }else{
        return null;
      }
    }
    private getReferrer(){
      var referrer = "";
      if (typeof document !== 'undefined') {
        console.log("document.referrer:" + document.referrer);
        referrer = document.referrer;

      }
      if((referrer == null || referrer.length == 0)&&typeof localStorage !== 'undefined'){

          referrer =localStorage.getItem('previousRoute');
       }
       return referrer;
    }
    parse(data:any){
    }

}