import { Base } from './base';

/** Class representing B2c Partnership Service. */
export class B2cPartnershipService extends Base {
	private membershipApi = this.config.get('membershipApi');
	private membershipPartnershipsApiKey = this.config.get('membershipPartnershipsApiKey');

	/**
	 * hasFreeTokens
	 * This function checks if partner has free tokens available.
	 * @param partnerId - Partner ID
	 * @returns true|false
	 */
	public async hasFreeTokens(partnerId: string): Promise<boolean> {
		const url = `${this.membershipApi}/partnerships/partner/${partnerId}/has-free-tokens`;

		const opts = {
			headers: {
				'Content-Type': 'application/json',
				'X-api-key': this.membershipPartnershipsApiKey,
			},
			method: 'GET',
		};
		const response = await this.fetch(url, opts);

		return response.ok;
	}

	/**
	 * tokenInfo
	 * This function checks if partner has free tokens available.
	 * @param partnerId - Partner ID
	 * @returns Partnership Token Info
	 */
	public async tokenInfo(partnerId: string, token: string): Promise<Object> {
		const url = `${this.membershipApi}/partnerships/partner/${partnerId}/token/${token}`;
		const opts = {
			headers: {
				'Content-Type': 'application/json',
				'X-api-key': this.membershipPartnershipsApiKey,
			},
			method: 'GET',
		};
		const response = await this.fetch(url, opts);
		if (response.ok) {
			try {
				const { status, partner, user } = await response.json();
				return { status, partner, user };
			} 
			catch (e) {
				// Not throwing err here as in this case will try create new token if possible for user.
			}
		}
		return {};
	}

	/**
	 * bookPartnershipToken
	 * This function books a PartnershipToken for 30 mins.
	 * @param partnerId - Partner ID
	 * @throws {NotFoundError}
	 * @returns Partnership Token
	 */
	public async bookPartnershipToken(partnerId: string): Promise<string> {
		const url = `${this.membershipApi}/partnerships/partner/${partnerId}/book-token`;

		// We are using fetch directly here, since this API doesn't return a response body which the requestPost method expects.
		const opts = {
			headers: {
				'Content-Type': 'application/json',
				'X-api-key': this.membershipPartnershipsApiKey,
			},
			method: 'POST',
			body: JSON.stringify({})
		};
		const response = await this.fetch(url, opts);
		if (!response.ok) {
			throw new Error('noTokenForPartner');
		}

		const result = await response.json();
		return result.token;
	}

	/**
	 * assignPartnershipToken
	 * This function assigns the given PartnershipToken to the given user.
	 * @param partnerId - Partner ID
	 * @param token - The token to redeem
	 * @param userId User's ID
	 * @returns Whether the assignment was successful
	 */
	public async assignPartnershipToken(partnerId: string, token: string, userId: string): Promise<boolean> {
		const url = `${this.membershipApi}/partnerships/partner/${partnerId}/assign-token`;

		// We are using fetch directly here, since this API doesn't return a response body which the requestPost method expects.
		const opts = {
			headers: {
				'Content-Type': 'application/json',
				'X-api-key': this.membershipPartnershipsApiKey,
			},
			method: 'POST',
			body: JSON.stringify({ token, user: userId })
		};
		const response = await this.fetch(url, opts);
		return response.ok;
	}
}