var abfall = false;
(function(i) {
 
    var Ical = function Ical(){
        this.version = '';
        this.prodid = '';
        this.events = [];
        this.todos = [];
        this.journals = [];
        this.freebusys = [];
    }
    var xprops = 'x-[^:;]+';
    var ianaprops = '[\\w]+[^:;]+'
    var icalParser = {
        icals : [],
        propsList : {
            'event':'(dtstamp|uid|dtstart|class|created|description|geo|last-mod|location|organizer|priority|seq|status|summary|transp|url|recurid|rrule|dtend|duration|attach|attendee|categories|comment|contact|exdate|rstatus|related|resources|rdate|'+xprops+'|'+ianaprops+')',
            'freebusy':'(dtstamp|uid|contact|dtstart|dtend|organizer|url|attendee|comment|freebusy|rstatus|'+xprops+'|'+ianaprops+')',
            'journal':'(dtstamp|uid|class|created|dtstart|last-mod|organizer|recurid|seq|status|summary|url|rrule|attach|attendee|categories|comment|contact|description|exdate|related|rdate|rstatus|'+xprops+'|'+ianaprops+')',
            'todo':'(dtstamp|uid|class|completed|created|description|dtstart|geo|last-mod|location|organizer|percent|priority|recurid|seq|status|summary|url|rrule|due|duration|attach|attendee|categories|comment|contact|exdate|rstatus|related|resources|rdate|'+xprops+'|'+ianaprops+')'
        },
        parseIcal : function(icsString){
            var cals = icsString.match(/BEGIN:VCALENDAR\r?\n(.*\r?\n)+?END:VCALENDAR/ig);
            for(var index in cals){
                //console.log("--->"+index+" "+cals[index]);
                var ical = new Ical();
                ical.version = this.getValue('VERSION',cals[index]);
                ical.prodid = this.getValue('PRODID',cals[index]);
                cals[index] = cals[index].replace(/\r\n /g,'');
                cals[index] = cals[index].replace(/BEGIN:VCALENDAR\r?\n/ig,'');
                var reg = /BEGIN:(V.*?)\r?\n(.*\r?\n)+?END:\1/gi;
                matches = cals[index].match(reg);
                if(matches){
                    for(i=0;i<matches.length;i++){
                        //console.log('---------->'+matches[i]+"\n<------------");
                        this.parseVComponent(matches[i],ical);
                    }
                }
                this.icals[this.icals.length] = ical;
            }
        },
        parseVComponent : function(vComponent,ical){
            var nameComponent = vComponent.match(/BEGIN:V([^\s]+)/i)[1].toLowerCase();
            vComponent = vComponent.replace(/\r?\n[\s]+/igm,''); //unfolding
            vComponent = vComponent.replace(/(^begin|^end):.*/igm,'');
            //console.log(nameComponent+' ++++ '+vComponent);
            var props = vComponent.match(new RegExp(this.propsList[nameComponent]+'[:;].*','gim'));
            if(props){
                var component=[];
                for(var index in props){
                    var nom = props[index].replace(/[:;].*$/,'');
                    //console.log("--vcompo "+index+" "+nom);
                    var propKey = /*'prop_'+*/nom.toLowerCase();
                    if(component[propKey]===undefined) component[propKey] = [];
                    component[propKey][component[propKey].length] = this.getValue(nom,props[index]);
                    component['raw'] = vComponent;
                }
                if(ical[nameComponent+'s'] !== undefined)
                    ical[nameComponent+'s'][ical[nameComponent+'s'].length] = component;
            }
        },
        getValue: function(propName,line){
            //console.log(line);
            var prop={};
            line = line.replace(/^\s+/g,'').replace(/\s+$/gi,'');
            reg = new RegExp('('+propName+')((?:;[^=]*=[^;:\n]*)*):([^\n\r]*)','gi');
            var matches = reg.exec(line);
            if(matches){ //on a trouvé la propriété cherchée
                //console.log(propName+' ==] params='+RegExp.$2+' / valeur='+RegExp.$3);
                var valeur = RegExp.$3;
                var tab_params=[];
                if(RegExp.$2.length>0){ //il y a des paramètres associés
                    var params = RegExp.$2.substr(1).split(';');
                    var pair;
                    for(k=0;k<params.length;k++){
                        pair = params[k].split('=');
                        if(!pair[1]) pair[1] = pair[0];
                        tab_params[pair[0]] = pair[1];
                    }
                }
                prop = { value:valeur,name:propName };
                if(Object.keys(tab_params).length>0)
                    prop.params = tab_params;
            }
            return prop;
        },
    }
   
   
    /**
    * Funktion um ical Datumsstring (YYYYMMDD) in Date Objekt zu wandeln
    */
    function calenDateFrom(icalStr)  {
        var strYear = icalStr.substr(0,4);
        var strMonth = parseInt(icalStr.substr(4,2),10)-1;
        var strDay = icalStr.substr(6,2);
        var strHour = 0;
        var strMin = 0;
        var strSec = 0;
 
        var oDate =  new Date(strYear,strMonth, strDay, strHour, strMin, strSec)
 
        return oDate;
    }
   
    function calenDateTo(icalStr)  {
        var strYear = icalStr.substr(0,4);
        var strMonth = parseInt(icalStr.substr(4,2),10)-1;
        var strDay = icalStr.substr(6,2);
        var strHour = 23;
        var strMin = 59;
        var strSec = 59;
 
        var oDate =  new Date(strYear,strMonth, strDay, strHour, strMin, strSec)
 
        return oDate;
    }
   
   
    var stopper = 0;
    icalParser.parseIcal(input);
    var event = icalParser.icals[0].events[0];
    icalParser.icals[0].events.forEach(function (currentValue, index, originalArray) {
        /**
        *   Prüfen ob das aktuelle Datum zwischen zwei Daten liegt, bzw. auf einen Tag fällt
        */
        var dateFrom = calenDateFrom(currentValue.dtstart[0].value);
        var dateTo = calenDateTo(currentValue.dtend[0].value);
        var dateCheck = new Date();
 
        if (dateFrom > dateCheck && stopper == 0){
            //var dateTo2 = dateTo.toString();
            //var dateTo2 = new Date(dateTo).toLocaleString();
            abfall = dateTo.getFullYear() + "-" + (dateTo.getMonth() + 1) + "-" + (dateTo.getDate() -1) + "T00:00:00"
            stopper = 1;
        }
       
    });
    return abfall;
   
   
   
})(input);