import { Base } from './base';
import { MembershipInvoiceResponse, MembershipSingleInvoiceResponse } from './types/invoice';

export enum InvoiceStatus {
	Posted = 'Posted',
	Draft = 'Draft',
	Cancelled = 'Cancelled'
}

export enum BalanceType {
	Outstanding = 'Outstanding',
	Paid='Paid',
	NonZero='NonZero',
	Refunded='Refunded',
	Negative='Negative'
}

export class Invoice extends Base {
	private membershipApi = this.config.get('membershipApi');
	private invoiceApiKey = this.config.get('invoiceApiKey');

	/**
	 * This function is the public method for retrieving the list of invoices for a given subscription number.
	 * @param number Required. subscription number.
	 * @param sessionToken Required. user's session FT secure session token.
	 * @param status Optional. Status of the invoices requested - can be 'Posted', 'Draft' or 'Cancelled'.
	 * @returns list of invoices
	 */
	public async getInvoicesBySubscriptionNumber(number: string, sessionToken: string, status?: string): Promise<MembershipInvoiceResponse> {
		const url = `${this.membershipApi}/invoice/invoices?subscriptionNumber=${number}${status ? `&invoiceStatus=${status}` : ''}`;
		const additionalHeaders = { 'FTSession-s': `${sessionToken}` };

		return await this.requestGet({ url, key: this.invoiceApiKey, additionalHeaders, targetApiSystemCode: 'invoice-svc' });
	}
	/**
	 * This function is the public method for retrieving the list of invoices for a given subscription number.
	 * @param number Required. subscription number.
	 * @param sessionToken Required. user's session FT secure session token.
	 * @param balance optional for now - the balance to look up for in membership for the customer e.g outstanding from the balanceType enum
	 * @returns list of invoices
	 */
	 public async getInvoicesByBalance(number: string, sessionToken: string, balance:BalanceType): Promise<MembershipInvoiceResponse> {
		const url = `${this.membershipApi}/invoice/invoices?subscriptionNumber=${number}&balance=${balance}`;
		const additionalHeaders = { 'FTSession-s': `${sessionToken}` };

		return await this.requestGet({ url, key: this.invoiceApiKey, additionalHeaders, targetApiSystemCode: 'invoice-svc' });
	}
	/**
	 * This function is the public method for retrieving an invoice based on the invoice id given.
	 * @param invoiceId Required. id of the requested invoice
	 * @param sessionToken Required. user's session FT secure session token.
	 * @returns invoice
	 */
	public async getInvoiceById(invoiceId: string, sessionToken: string): Promise<MembershipSingleInvoiceResponse> {
		const url = `${this.membershipApi}/invoice/invoices/${invoiceId}`;
		const additionalHeaders = {
			'FTSession-s': `${sessionToken}`,
			'Accept': 'application/json',
		};

		return await this.requestGet({ url, key: this.invoiceApiKey, additionalHeaders, targetApiSystemCode: 'invoice-svc' });
	}

	/**
	 * Get the binary invoice file for the given invoice id
	 * @param invoiceId Required. id of the requested invoice
	 * @param sessionToken Required. user's session FT secure session token
	*/
	public async download(invoiceId: string, sessionToken: string) {
		const url = `${this.membershipApi}/invoice/invoices/download/${invoiceId}`;

		const additionalHeaders = {
			'FTSession-s': `${sessionToken}`,
			'Accept': 'application/pdf',
		};

		return await this.requestGet({
			url,
			key: this.invoiceApiKey,
			additionalHeaders,
			targetApiSystemCode: 'invoice-svc'
		});
	}
}