import { startOfDay } from 'date-fns';
import { MembershipSuspensionResponse } from '../types/suspensions';

export class Suspension {

	public id: string;
	public subscriptionNumber: string;
	public startDate: string;
	public endDate: string;
	public credits: number;
	public editions: number;
	public originUser: string;

	private todaysDate: Date;
	private endDateStartOfDay: Date;
	private startDateStartOfDay: Date;

	constructor(suspension: MembershipSuspensionResponse) {
		this.id = suspension.suspensionId;
		this.subscriptionNumber = suspension.subscriptionNumber;
		this.startDate = suspension.startDate;
		this.endDate = suspension.endDate;
		this.credits = suspension.credits;
		this.editions = suspension.editions;
		this.originUser = suspension.originUser;

		this.todaysDate = startOfDay(new Date());
		this.endDateStartOfDay = startOfDay(new Date(this.endDate));
		this.startDateStartOfDay = startOfDay(new Date(this.startDate));
	}

	/**
	 * Is suspension active
	 * @returns true if today's date falls within the user's suspension period.
	 */
	public get isActive(): boolean {
		/*
			To be an active suspension both of the following need to be true:
			- today's date needs to before or on the suspension endDate
			- today's date needs to be after or on the suspension start date
		*/
		return this.todaysDate <= this.endDateStartOfDay
			&& this.todaysDate >= this.startDateStartOfDay;
	}

	/**
	 * Is there a suspension in the future
	 * @returns true if today's date is before the suspension start date
	 */
	public get isFuture(): boolean {
		return this.todaysDate < this.startDateStartOfDay;
	}

	/**
	 * Has there been a suspension in the past
	 * @returns true if today's date is after the suspension end date
	 */
	public get hasPast(): boolean {
		return this.todaysDate > this.endDateStartOfDay;
	}

	/**
	 * Can the ACTIVE suspension be ended
	 * @param firstSuspensionDate this is the result from the /newspaper/info/first-suspension-date end point of the newspaper info service.
	 * It provides us with more accurate results as it takes into account non-working days.
	 * @returns true if the suspension is active and today's date is at least 2 working days before the suspension endDate.
	 */
	public canEndActiveSuspension(firstSuspensionDate: string): boolean {
		if (!this.isActive) {
			return false;
		}

		const suspensionDateStartOfDay = startOfDay(new Date(firstSuspensionDate));
		return suspensionDateStartOfDay < this.endDateStartOfDay;
	}

	/**
	 * Can the future suspension be deleted
	 * @param firstSuspensionDate this is the result from the /newspaper/info/first-suspension-date end point of the newspaper info service.
	 * It provides us with more accurate results as it takes into account non-working days.
	 * @returns true if there is a future suspension and if today's date is at least 2 working days before the suspension startDate.
	 */
	public canDeleteFutureSuspension(firstSuspensionDate: string): boolean {

		if (!this.isFuture) {
			return false;
		}

		const suspensionDateStartOfDay = startOfDay(new Date(firstSuspensionDate));
		return suspensionDateStartOfDay <= this.startDateStartOfDay;
	}

	/**
	 * Can the FUTURE suspension be ended (a suspension that starts tomorrow is NOT active according to the SDK, but it can't be deleted anymore. However, it CAN be ended)
	 * @param firstSuspensionDate this is the result from the /newspaper/info/first-suspension-date end point of the newspaper info service.
	 * It provides us with more accurate results as it takes into account non-working days.
	 * @returns true if the future suspension can be ended
	 */
	public canEndFutureSuspension(firstSuspensionDate: string): boolean {

		const firstSuspensionDateBeforeEndDate = startOfDay(new Date(firstSuspensionDate)) < this.endDateStartOfDay;

		const canBeDeleted = this.canDeleteFutureSuspension(firstSuspensionDate);

		return !canBeDeleted && firstSuspensionDateBeforeEndDate;
	}

}