var DATE_LOCALE_FORMAT = "D.M.YY"; //10.2.16
var DATE_INPUT_FORMAT = "YYYY-MM-DD"; //2016-02-10
var TIME_FORMAT = "HH:mm"; // 17:30
var WEEKDAY_FORMAT = "dddd"; //Monday
var MOMENT_LOCALE = "de";
var TIMEZONE_NAME = "Europe/Berlin";
//requires moment.js

Array.prototype.asChipData = function () {
    var chips = [];
    this.forEach(function (el, index, array) {
        chips.push({
            tag: el,
            id: index
        });
    });
    return chips;
}
Array.prototype.fromChipData = function () {
    var strings = [];
    this.forEach(function (el, id, array) {
        strings.push(el.tag);
    });
    return strings;
}

function Rule(duration, arten, titel) {
    this.duration = duration;
    this.art = arten;
    this.title = titel;
}

Rule.prototype = {
    get Dauer() {
        return this.duration;
    },
    set Dauer(value) {
        this.duration = value;
    },
    get Arten() {
        return this.art.asChipData();
    },
    set Arten(value) {
        this.art = value.fromChipData();
    },
    get Titel() {
        return this.title.asChipData();
    },
    set Titel(value) {
        this.title = value.fromChipData();
    }
};
Rule.prototype.fits = function (art, title) {
    var artMatch = false;
    var nameMatch = false;

    if (this.art.length == 0) artMatch = true;
    else {
        this.art.forEach(function (el, i) {
            if (art.includes(el.toLowerCase())) artMatch = true;
        });
    }

    if (this.title.length == 0) nameMatch = true;
    else {
        this.title.forEach(function (el, i) {
            if (name.includes(el.toLowerCase())) nameMatch = true;
        });
    }

    return artMatch && nameMatch;
}
Rule.defaults = function () {
    var rules = [];
    rules.push(new Rule(60, ['VS'], ['Kinderkonzert']));
    rules.push(new Rule(120, ['VS'], ["expeditionskonzert", "sinfoniekonzert"]));
    rules.push(new Rule(150, ['Oa', 'GP'], ['Expeditionskonzert']));
    rules.push(new Rule(60, ['Oa', 'GP'], ['Expeditionskonzert']));
    rules.push(new Rule(150, ['Oa', 'OSP'], []));
    rules.push(new Rule(180, ["VS", "BO", "OHP", "HP", "GP", "Prem", "WA"], []));
    rules.push(new Rule(60, [], []));
    rules.push(new Rule(60, [], []));
    rules.push(new Rule(60, [], []));
    rules.push(new Rule(60, [], []));
    rules.push(new Rule(60, [], []));

    return rules;
}
var DURATION_RULES = Rule.defaults();

function Shift(kind, name, date, info) {
    'use strict';
    this.Datum = date.format(DATE_INPUT_FORMAT);
    this.Beginn = date.format(TIME_FORMAT);
    this.Art = kind;
    this.Beschreibung = info;
    this.Name = name;
    Shift.setDurationFromRules(this);
}
Shift.prototype = {
    get Wochentag() {
        return this._date.clone().locale(MOMENT_LOCALE).format(WEEKDAY_FORMAT);
    },
    set Wochentag(value) {
        throw "kann nicht gesetzt werden.";
    },

    get FormattedDatum() {
        return this._date.clone().format(DATE_LOCALE_FORMAT);
    },
    set FormattedDatum(value) {
        var dateMoment = moment(value, DATE_LOCALE_FORMAT);
        this._date = dateMoment;
    },

    get Datum() {
        return this._date.clone().format(DATE_INPUT_FORMAT);
    },
    set Datum(value) {
        var dateMoment = moment(value).startOf('day');
        this._date = dateMoment.clone();
    },

    get Beginn() {
        return this._begin.clone().format(TIME_FORMAT);
    },
    set Beginn(value) {
        var dateMoment = moment(this.Datum + " " + value, DATE_INPUT_FORMAT + " " + TIME_FORMAT);
        this._begin = dateMoment.clone();
    },
    get Ende() {
        return this._begin.clone().add(this._duration).format(TIME_FORMAT);
    },
    set Ende(value) {
        var dateMoment = moment(this.Datum + " " + value, DATE_INPUT_FORMAT + " " + TIME_FORMAT);
        if (this._begin > dateMoment) {
            dateMoment.add(1, 'd');
        }
        this._duration = moment.duration(dateMoment.diff(this._begin));
    },

    get Dauer() {
        return this._duration;
    },
    set Dauer(duration) {
        this._duration = duration;
    },

    get Name() {
        return this._name;
    },
    set Name(value) {
        this._name = value ? value.trim() : "";
    },

    get VEventTitle() {
        return this.Name + "   " + this.Art;
    },
    set VEventTitle(value) {
        throw "kann nicht gesetzt werden.";
    },

    get Art() {
        return this._kind;
    },
    set Art(value) {

        this._kind = value ? value.trim() : "";
    },

    get Beschreibung() {
        return this._description;
    },
    set Beschreibung(value) {
        this._description = value ? value.trim() : "";
    }

}
Shift.setDurationFromRules = function (shift) {
    'use strict';
    var isAllDayEvent = shift.Beginn == "00:00";
    if (isAllDayEvent) {
        shift.Dauer = moment.duration(24, 'h').locale(MOMENT_LOCALE);
        return;
    }
    var art = shift.Art.toLowerCase();
    var name = shift.Name.toLowerCase();
    var duration = 60;
    for (var rIndex in DURATION_RULES) {
        var rule = DURATION_RULES[rIndex];

        if (rule.fits(art, name)) {
            duration = rule.Dauer;
            break;
        }
    }
    shift.Dauer = moment.duration(duration, 'm').locale(MOMENT_LOCALE);
}
Shift.prototype.toVEvent = function () {
    'use strict';
    var end = this._begin.clone().add(this._duration);
    return new VEvent(TIMEZONE_NAME, this._begin, end, this.VEventTitle, this.Beschreibung);
};
Shift.thaw = function (jsonShift) {
    'use strict';
    moment.locale(MOMENT_LOCALE);
    var begin = moment(jsonShift._begin);
    var shift = new Shift(jsonShift._kind, jsonShift._name, begin, jsonShift._description);
    shift.id = jsonShift.id;
    shift.Dauer = moment.duration(jsonShift._duration);
    return shift;
};