var ai1ec = (function(){
    var API = {}, json = [], events = [];

    //Categorie di eventi
    API.cats = {
        single: 34,
        repeat: 87
    };

    var getCleanId = function(uid){
        var initChar = uid.indexOf('-'),
            endChar = uid.indexOf('@');

        return uid.substr(initChar+1, uid.length - uid.substr(endChar -1).length - initChar );
    };

    //Parser di un evento dell'array tornato da getXmlData
    API.event = {
        getId : function(event) {
            return event.properties.uid ? getCleanId(event.properties.uid.text) : null;
        },

        getTitle : function(event) {
            return event.properties.summary.text || null;
        },

        getDescription : function(event) {
            return event.properties.description.text || "";
        },

        getInitDate : function(event) {
            return event.properties.dtstart && event.properties.dtstart["date-time"] ? event.properties.dtstart["date-time"] : "";
        },

        getEndDate : function(event) {
            return event.properties.dtend && event.properties.dtend["date-time"] ? event.properties.dtend["date-time"] : "";
        },

        getCats : function(event) {
            return event.properties.categories.text || "";
        },

        getTags : function(event) {
            return event.properties["x-tags"] && event.properties["x-tags"]._ ? event.properties["x-tags"]._ : "";
        },

        getUrl : function(event) {
            return event.properties.url && event.properties.url.uri && event.properties.url.uri ? event.properties.url.uri : "";
        },

        getContact : function(event) {
            return event.properties.contact || "";
        },

        getGeo : function(event) {
            return event.properties.location.text || "";
        },

        //Regole per gli eventi ripetitivi
        getRule : function(event) {
            return event.properties.rrule || "";
        },

    		getImage : function(event){
    			return event.properties['x-wp-images-url'] && event.properties['x-wp-images-url'].unknown ? event.properties['x-wp-images-url'].unknown : "";
    		},
    };

    var getXmlData = function(url, catId, callback) {
        $.ajax({
            url: url,
            dataType: 'xml',
            method: 'GET',
            success: function(res) {
                json[catId] = $.xml2json(res);
                events[catId] = json[catId]["#document"].icalendar.vcalendar.components.vevent;
                console.log(events[catId]);
                return callback(events[catId]);
            },
            error: function(err){
                console.log("Err: status ", err.status);
                return callback(events[catId]);
            }
        });
    };

    var getDefaultUrl = function(catId){
        catId = catId || API.cats.single;

        return API.remote.site + API.remote.q + "&" + API.remote.catq + catId + "&" + API.remote.xmlq;
     };

    //Oggetto che gestisce attività remote
    API.remote = {
        site : 'http://www.ecn.org/xm24',
        q : '/?plugin=all-in-one-event-calendar&controller=ai1ec_exporter_controller&action=export_events',
        post: 'ai1ec_post_ids=',
        catq : 'ai1ec_cat_ids=',
        xmlq : 'xml=true',
        win : 'window=true',
        //post_ids

        //Torna un array con tutti gli eventi organizzati da xm24, un array vuoto se errore.
        getAllEvents : function(catId, callback) {
            var url = getDefaultUrl(catId);
            getXmlData(url, catId, callback);
        },

        //Torna un array con gli eventi tra -30 e +30 giorni da oggi, un array vuoto se errore.
        getLastEvents : function(catId, callback) {
            var url = getDefaultUrl(catId) + '&' + API.remote.win;
            getXmlData(url, catId, callback);
        },

    }

    return API;
})();