import ngModule from '../module';
import Section from 'core/lib/section';
import './style.scss';

class Controller extends Section {
    constructor($el, $, $t, $http, $state) {
        super($el, $, $t, $http, $state);

        this.excls = {};
        this.resetEvents();
        this.ndMonthDate = new Date();
        this.ndMonthDate.setMonth(this.ndMonthDate.getMonth() + 1);
    }

    onSelection($days, $type, $weekday) {
        this.emit('selection', {$days, $type, $weekday});
    }

    resetEvents() {
        this.wdays = [];
        this.days = {};
        this.ranges = [];
    }

    get events() {
        return this._events;
    }

    set events(value) {
        this._events = value;
        this.resetEvents();
        if (!value) return;

        function setWdays(wdays, weekDays) {
            let codes = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];
            if (!weekDays) return [];
            weekDays = weekDays.split(',');
            for (let wday of weekDays)
                wdays[codes.indexOf(wday)] = true;
            return wdays;
        }

        for (let event of value) {
            if (event.from && event.to) {
                this.ranges.push({
                    from: new Date(event.from).setHours(0, 0, 0, 0),
                    to: new Date(event.to).setHours(0, 0, 0, 0),
                    wdays: setWdays([], event.weekDays)
                });
            } else if (event.from) {
                let day = new Date(event.from).setHours(0, 0, 0, 0);
                this.days[day] = true;
            } else
                setWdays(this.wdays, event.weekDays);
        }

        this.repaint();
    }

    get exclusions() {
        return this._exclusions;
    }

    set exclusions(value) {
        this._exclusions = value;
        this.excls = {};
        if (!value) return;

        value.forEach(exclusion => {
            let day = new Date(exclusion.day).setHours(0, 0, 0, 0);
            this.excls[day] = true;
        });

        this.repaint();
    }

    hasRange(time, wday) {
        let range = this.ranges.find(e => e.from <= time && e.to >= time);
        return range && range.wdays[wday];
    }

    hasEvents(day) {
        let time = day.getTime();
        let wday = day.getDay();
        return this.wdays[wday]
            || this.days[time]
            || this.hasRange(time, wday);
    }

    getClass(day) {
        if (this.excls[day.getTime()])
            return 'excluded';
    }

    repaint() {
        this.$.stMonth.repaint();
        this.$.ndMonth.repaint();
    }
}

ngModule.component('vnZoneCalendar', {
    template: require('./index.html'),
    controller: Controller,
    bindings: {
        events: '<?',
        exclusions: '<?'
    }
});