/**
 *  get the data from schedule
 */
class Schedule {

    /**
     * class constructor
     */
    constructor(scheduleXml){
        /**
         *  the schedule xml object parsed as jQuery object
         */
        this.schedule = false;

        /**
         * Array of Events
         *
         * [{
         *  id: 2132,
         *  title: "foobar"
         *  date:2018-09-22T10:30:00+02:00
         *   }]
         */
        this.events = [];

        /**
         *  object with Information of the conference
         *  {'title', 'start', 'end', ..}
         */
        this.conf = {
            title:  'defaultConf',
            start:  '1984-09-23',
            end:    '1984-09-24'
        }

        /**
         * indepent time
         */
        this.now = new Date();

        this.schedule = scheduleXml.children("schedule");

        this.conf.version   = this.schedule.children("version").text();
        this.conf.title     = this.schedule.children("conference").children("title").text();
        this.conf.start     = this.schedule.children("conference").children("start").text();
        this.conf.end       = this.schedule.children("conference").children("end").text();
    }

    /**
     * set orientation time
     */
    setTimeTo(time){
        this.now = time;
    }

    /**
     * @return String the schedule version
     */
    getScheduleVersion(){
        return this.conf.version    ;
    }
    /**
     * @return String the schedule title
     */
    getScheduleTitle(){
        return this.conf.title;
    }
    /**
     * @return day of conf start
     */
    getScheduleStart(){
        return this.conf.start;
    }
    /**this.events
     * @return day of conf end
     */
    getScheduleEnd(){
        return this.conf.end;
    }

    /**
     * return array of all Events
     */
    getEvents()
    {
        let allEvents = [];
        if (this.events.length == 0 ){
            //this.schedule.find('event').toArray();
            var now = this.now
            this.schedule.find('event').each( function(){

                var eventStart = new Date($(this).children('date').text());
                var tenHours = 36000000;
                if ((eventStart - now) >= 0 && (eventStart - now) < tenHours){
                    allEvents.push({
                        title:      $(this).children('title').text(),
                        room:       $(this).children('room').text(),
                        date:       $(this).children('date').text(),
                        start:      $(this).children('start').text(),
                        duration:   $(this).children('duration').text(),
                        abstract:   $(this).children('abstract').text().slice(0, 256),
                        persons:    $(this).children('persons').text(),
                    });
                }
            });
        }
        this.events = allEvents;
    }

    getEventsAllTracks(count)
    {
        let roomlist = [];
        let events = this.getNextEvents(count);
        events.forEach( event => {
            if (0 == roomlist.filter(item => event.room == item).length){
                roomlist.push(event.room);
            }
        });
        return {
            events:     events,
            roomlist:   roomlist
        }
    }

    /**
     * get next Events by time and room
     *
     * @param {Timestamp} minimum time to start
     * @param {*} room
     */
    getTalk(time, room){
        return talk;
    }

    /**
     * get the next Events, based on time
     *
     */
    getNextEvents(count){
        if (this.events.length == 0){
            return this.events.slice(0, count);
        }

        let talks = [];

        let now = this.now;

        this.events.forEach( talk => {
            let talkStart = new Date(talk.date).getTime();
            if ( talkStart >= now ){
                talks.push(talk);
            }
        });

        return this.events.slice(0, count);
    }

}