import { isBefore, parseISO } from 'date-fns';
import { SubscriptionDetails } from '../types/subscription';

/** Class representing a subscription. */
export class Subscription {
	public source = '';
	public id = '';
	public number = '';
	public accountId = '';
	public accountNumber = '';
	public status = '';
	public effectiveStartDate = '';
	public effectiveEndDate = '';
	public renewalDate = '';
	public trial = false;
	public ratePlans: [SubscriptionRatePlan?] = [];
	public displayName = '';
	public futureRatePlan?: SubscriptionFutureRatePlan;
	public subscriptionTerm?: SubscriptionTerm;
	public isSingleTerm = false;
	public isOutOfTerm = false;
	public offerId = '';
	public offer: OfferData = {};
	public stepUp: StepUpData = {};

	constructor(data?: Partial<Subscription>) {
		if (data) {
			Object.assign(this, data);
		}
	}
}

/** Class representing the Offer data from subs graphql */
export class OfferData {
	public offerId? = '';
	public discount? = null;

	constructor(data?: Partial<OfferData>) {
		if (data) {
			Object.assign(this, data);
		}
	}
}

/** Class representing the StepUp data from subs graphql */
export class StepUpData {
	public isInStepUp? = false;
	public priceBeforeStepUp? = null;
	public priceAfterStepUp? = null;

	constructor(data?: Partial<StepUpData>) {
		if (data) {
			Object.assign(this, data);
		}
	}
}

/** Class representing an event in a user's subscription history. */
export class SubscriptionHistoryModel {
	public eventEffectiveDate = '';
	public eventDate = '';
	public eventType = '';
	public subscriptionBefore?: SubscriptionDetails;
	public subscriptionAfter?: SubscriptionDetails;

	constructor(data?: Partial<SubscriptionHistoryModel>) {
		if (data) {
			Object.assign(this, data);
		}
	}

	get isFutureStepUp() {
		// If the type is stepup and today is still before the effective date the user is in step up.
		return this.eventType.toLowerCase() === 'stepup' && isBefore(new Date(), parseISO(this.eventEffectiveDate));
	}

	get isPriceFreeze() {
		return this.eventType.toLowerCase() === 'undostepup';
	}

	get isFutureTransition() {
		return this.eventType.toLowerCase() === 'transition' && isBefore(new Date(), parseISO(this.eventEffectiveDate));
	}

	get isTransition() {
		return this.eventType.toLowerCase() === 'transition';
	}
}

/** Class representing a rate plan */
export class SubscriptionRatePlan {
	public id = '';
	public productName = '';
	public productCode = '';
	public term = '';
	public option = '';
	public termStartDate = '';
	public ratePlanCharges: [SubscriptionRatePlanCharge?] = [];

	constructor(data?: Partial<SubscriptionRatePlan>) {
		if (data) {
			Object.assign(this, data);
		}
	}

	public getTermName(): string {
		switch (this.term) {
			case 'P1M':
				return 'Monthly';
			case 'P3M':
				return 'Quarterly';
			case 'P1Y':
				return 'Annual';
			default:
				return '';
		}
	}

	public getTermUnit(): string {
		switch (this.term) {
			case 'P1M':
				return 'month';
			case 'P3M':
				return 'quarter';
			case 'P1Y':
				return 'year';
			default:
				return 'term';
		}
	}
}

/** Class representing a rate plan charge */
export class SubscriptionRatePlanCharge {
	public name = '';
	public description = '';
	public type = '';
	public productType = '';
	public productCode = '';
	public effectiveStartDate = '';
	public effectiveEndDate = '';
	public chargedThroughDate = '';
	public price = 0;
	public currency = 'GBP';

	constructor(data?: Partial<SubscriptionRatePlanCharge>) {
		if (data) {
			Object.assign(this, data);
		}
	}
}

/** Class representing a rate plan */
export class SubscriptionFutureRatePlan {
	public id = '';
	public productName = '';
	public productCode = '';
	public term = '';
	public option = '';
	public ratePlanCharge?: SubscriptionRatePlanCharge;

	constructor(data?: Partial<SubscriptionFutureRatePlan>) {
		if (data) {
			Object.assign(this, data);
		}
	}

	public getTermUnit(): string {
		switch (this.term) {
			case 'P1M':
				return 'month';
			case 'P3M':
				return 'quarter';
			case 'P1Y':
				return 'year';
			default:
				return 'term';
		}
	}
}

/** Class representing a subscription term */
export class SubscriptionTerm {
	public iso8601Duration = '';
	public billingPeriod = '';
	public termType = '';
	public autoRenewTerm = false;
	public termPeriodType = '';
	public termEndDate = '';
	public termStartDate = '';

	constructor(data?: Partial<SubscriptionTerm>) {
		if(data){
			Object.assign(this, data);
		}
	}
}