/**
 * Contains a bunch of helper functions.
 */
export const helperService = {
    /**
     * Converts number into a human readable percent integer.
     *
     * @param {*} r Floating point percent number
     */
    asPercent(r) {
        return Math.floor(r * 100);
    },

    /**
     * Converts number into a human readable floating point number with a digit behind the delimiter.
     *
     * @param {*} r Floating point number
     */
    asFloat(r) {
        return Math.floor(r * 10) / 10;
    },

    /**
     * Converts timestamp into a human readable date format.
     *
     * @param {*} d ISO Timestamp
     */
    asDateFromISO(d) {
        return helperService.asDateFromObj(new Date(d));
    },

    /**
     * Converts timestamp into a human readable date format.
     *
     * @param {*} d Date object
     */
    asDateFromObj(d) {
        return new Intl.DateTimeFormat("de").format(d);
    },

    /**
     * Makes sure, that the given text is not too long.
     *
     * @param {*} text Some text that might be shortened
     * @param {*} maxLength Max number of characters
     *
     * @returns The shortened or same text
     */
    keepItShort(text, maxLength = 20, ellipsis = "...") {
        if (text.length > maxLength) {
            // Adding ellipsis
            var short = text.substring(0, maxLength - ellipsis.length).trim();
            return short + ellipsis;
        } else return text;
    },

    /**
     * Converts a date object into a date-time-timezone string, and sets times and timezone to zero.
     *
     * @source https://stackoverflow.com/a/43528844/7376120
     *
     * @param {*} date A date object
     *
     * @returns Date as string in the used format
     */
    toISODate(date) {
        var timezoneOffset = date.getMinutes() + date.getTimezoneOffset();
        var timestamp = date.getTime() + timezoneOffset * 1000;
        var correctDate = new Date(timestamp);

        correctDate.setUTCHours(0, 0, 0, 0);

        return correctDate.toISOString();
    },

    /**
     * Adds current duration to a record.
     * Copied from original juggl code.
     * @param {*} record The record instance to update.
     */
    addDuration(record) {
        if (record.end_time != null) return record;

        record.duration =
            (new Date().getTime() - new Date(record.start_time).getTime()) /
            1000;

        return record;
    },

    /**
     * Converts a datetime object into the necessary string format for server requests.
     * Copied from original juggl code.
     * @param {*} date
     */
    dateToString(date) {
        return (
            date.getFullYear() +
            "-" +
            (date.getMonth() + 1) +
            "-" +
            date.getDate() +
            " " +
            date.getHours() +
            ":" +
            date.getMinutes() +
            ":" +
            date.getSeconds()
        );
    },
};