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 () {
    return this.map((e, i) => {
        return {
            tag: e,
            id: i
        };
    })
}
Array.prototype.fromChipData = function () {
    return this.map(e => {
        return e.tag;
    })
}

function Rule() {
    var options = {};

    if (arguments[0]) options = arguments[0];

    var default_args = {
        'arten': [],
        'dauer': 60,
        'titel': [],
        'name': "Standard"
    }
    for (var index in default_args) {
        if (typeof options[index] == "undefined") options[index] = default_args[index];
    }

    this._duration = options.dauer;
    this._arten = options.arten;
    this._titel = options.titel;
    this._name = options.name;
}

Rule.prototype = {
    get Dauer() {
        return this._duration;
    },
    set Dauer(value) {
        this._duration = value;
    },

    get Arten() {
        return this._arten.asChipData();
    },
    set Arten(value) {
        this._arten = value.fromChipData();
    },

    get Titel() {
        return this._titel.asChipData();
    },
    set Titel(value) {
        this._titel = value.fromChipData();
    },

    get Name() {
        return this._name;
    },
    set Name(value) {
        this._name = value;
    },
};
Rule.prototype.fits = function (art, title) {
    var artMatch = false;
    var nameMatch = false;

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

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

    return artMatch && nameMatch;
}
Rule.thaw = function (json) {
    return new Rule({
        dauer: json._duration,
        name: json._name,
        arten: json._arten,
        titel: json._titel
    });
}
Rule.defaults = function () {
    var rules = [];
    var input = [{
            name: "EF #01",
            dauer: 60,
            arten: ['VS'],
            titel: ['Kinderkonzert']
        },
        {
            name: "EF #02",
            dauer: 120,
            arten: ['VS'],
            titel: ["Expeditionskonzert", "Sinfoniekonzert"]
        },
        {
            name: "EF #03",
            dauer: 150,
            arten: ['Oa', 'GP'],
            titel: ['Expeditionskonzert']
        },
        {
            name: "EF #04",
            dauer: 60,
            arten: ['Oa', 'GP'],
            titel: ['Expeditionskonzert']
        },
        {
            name: "EF #05",
            dauer: 150,
            arten: ['Oa', 'OSP']
        },
        {
            name: "EF #06",
            dauer: 180,
            arten: ["VS", "BO", "OHP", "HP", "GP", "Prem", "WA"]
        },
        {
            name: "Standard",
            dauer: 60
        }
    ];
    input.forEach(e => {
        rules.push(new Rule(e));
    });

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

function Shift() {
    var options = {};

    if (arguments[0]) options = arguments[0];

    var default_args = {
        'art': "",
        'name': "DUMMY",
        'datum': moment(),
        'beschreibung': "",
        'ort': "",
    }
    for (var index in default_args) {
        if (typeof options[index] == "undefined") options[index] = default_args[index];
    }

    this.Datum = options.datum.format(DATE_INPUT_FORMAT);
    this.Beginn = options.datum.format(TIME_FORMAT);
    this.Art = options.art;
    this.Beschreibung = options.beschreibung;
    this.Name = options.name;
    this.Ort = options.ort;

    if (typeof options.ende != "undefined") {
        this.Ende = options.ende;
    } else {
        if (!options.dontSetDurationFromRules) {
            Shift.setDurationFromRules(this, DURATION_RULES);
        }
    }

}

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() {
        var ende = this._begin.clone().add(this._duration).format(TIME_FORMAT);
        return ende;
    },
    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 Ort() {
        return this._ort;
    },
    set Ort(value) {
        this._ort = 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, rules) {
    '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 titel = shift.Name.toLowerCase();
    var duration = 60;
    for (var rIndex in rules) {
        var rule = rules[rIndex];

        if (rule.fits(art, titel)) {
            duration = rule.Dauer;
            break;
        }
    }
    shift.Dauer = moment.duration(duration, 'm').locale(MOMENT_LOCALE);
}
Shift.prototype.toVEvent = function () {
    var end = this._begin.clone().add(this._duration);
    return new VEvent({
        startMoment: this._begin,
        endMoment: end,
        title: this.VEventTitle,
        description: this.Beschreibung,
        location: this.Ort
    });
};
Shift.thaw = function (jsonShift) {
    moment.locale(MOMENT_LOCALE);
    var begin = moment(jsonShift._begin);
    var shift = new Shift({
        art: jsonShift._kind,
        name: jsonShift._name,
        datum: begin,
        beschreibung: jsonShift._description,
        ort: jsonShift._ort,

    });
    shift.id = jsonShift.id;
    shift.Dauer = moment.duration(jsonShift._duration);
    return shift;
};
Shift.prototype.updateBeginn = function(hour) {
    this._begin = this._begin.add('hours', hour);
}