import moment, {Moment} from 'moment';

export function parseNoSeparatedDate (dt: string, format: string, isUTC: boolean): Moment | undefined {
    let date: Moment | undefined;

    const getMoment = (dt: Date | string, format?: string) => isUTC ? moment.utc(dt, format) : moment(dt, format);

    if (dt.length === 8) {
        // For parsing dates, represented as "DDMMYYYY" (without separators)
        const d = new Date(
            parseInt(dt.substring(4, 8)),
            parseInt(dt.substring(2, 4)) - 1,
            parseInt(dt.substring(0, 2))
        );

        if (d instanceof Date && !isNaN(d.getFullYear())) {
            date = getMoment(d);
        }
    }

    if (!date && dt.length === format.length) {
        date = getMoment(dt, format);
    }

    return date;
}