import {
	endOfDay,
	isAfter,
	isBefore,
	isWithinInterval,
	startOfDay
} from 'date-fns';
import { VoucherDates } from '../types/print-info';

export class DeliveryVoucherDates {
	public voucherStartDate: string;
	public voucherEndDate: string;
	public fileDeliveryDate: string;
	public startDate: Date;
	public endDate: Date;
	public deliveryDate: Date;

	private todaysDate: Date;

	constructor (voucherDates: VoucherDates) {
		this.voucherStartDate = voucherDates.voucherStartDate;
		this.startDate = startOfDay(new Date(this.voucherStartDate));
		this.voucherEndDate = voucherDates.voucherEndDate;
		this.endDate = endOfDay(new Date(this.voucherEndDate));
		this.fileDeliveryDate = voucherDates.fileDeliveryDate;
		this.deliveryDate = startOfDay(new Date(this.fileDeliveryDate));

		this.todaysDate = startOfDay(new Date());
	}

	/**
	 * Does today's date fall between this vouchers start and end date.
	 * @returns true|false
	 */
	public isCurrentDeliveryDate (): boolean {
		return isWithinInterval(this.todaysDate, { start: this.startDate, end: this.endDate });
	}

	/**
	 * Does today's date come before this vouchers start date.
	 * @returns true|false
	 */
	public isFutureDeliveryDate (): boolean {
		return isBefore(this.todaysDate, this.startDate);
	}

	/**
	 * Does today's date come after this vouchers end date.
	 * @returns true|false
	 */
	public isPastDeliveryDate (): boolean {
		return isAfter(this.todaysDate, this.endDate);
	}
}