import ngModule from '../module';

/**
 * @property {Array} days Weekdays data array with the same indexes as Date.getDay()
 * @property {Object} map Weekdays data map using weekday codes as key
 * @property {Array} localeCodes Locale weekday codes indexes depend on current locale
 * @property {Array} locale Weekday data array with indexes depending on current locale
 *
 * Weekday properties:
 *
 * @property {Number} index The weekday index acording to Date.getDay()
 * @property {String} code The weekday code
 * @property {String} name The weekday name
 * @property {String} char The first weekday letter
 * @property {String} abr The abreviated 3 letters weekday name
 * @property {String} locale The weekday name in current locale
 * @property {String} localeChar The first weekday letter in current locale
 * @property {String} localeAbr The abreviated 3 letters weekday name in current locale
 */
class WeekDays {
    constructor($translate) {
        this.$translate = $translate;

        this.days = [
            {
                code: 'sun',
                name: 'Sunday'
            }, {
                code: 'mon',
                name: 'Monday'
            }, {
                code: 'tue',
                name: 'Tuesday'
            }, {
                code: 'wed',
                name: 'Wednesday'
            }, {
                code: 'thu',
                name: 'Thursday'
            }, {
                code: 'fri',
                name: 'Friday'
            }, {
                code: 'sat',
                name: 'Saturday'
            }
        ];

        this.map = {};
        for (let i = 0; i < this.days.length; i++) {
            let day = this.days[i];
            day.index = i;
            day.char = day.name.substr(0, 1);
            day.abr = day.name.substr(0, 3);
            this.map[day.code] = day;
        }

        this.getLocales();
    }

    getLocales() {
        for (let day of this.days) {
            let locale = this.$translate.instant(day.name);
            Object.assign(day, {
                locale,
                localeChar: locale.substr(0, 1),
                localeAbr: locale.substr(0, 3)
            });
        }

        this.localeCodes = [
            'mon',
            'tue',
            'wed',
            'thu',
            'fri',
            'sat',
            'sun'
        ];

        this.locales = [];
        for (let code of this.localeCodes)
            this.locales.push(this.map[code]);
    }

    fromSet(weekDays) {
        let wdays = [];

        if (weekDays) {
            let codes = weekDays.split(',');
            for (let code of codes) {
                let data = this.map[code];
                if (data) wdays[data.index] = true;
            }
        }

        return wdays;
    }

    toSet(wdays) {
        let weekDays = [];

        if (wdays) {
            for (let i = 0; i < wdays.length; i++) {
                if (!wdays[i]) continue;
                let data = this.days[i];
                if (data) weekDays.push(data.code);
            }
        }

        return weekDays.join(',');
    }
}
WeekDays.$inject = ['$translate'];

ngModule.service('vnWeekDays', WeekDays);