/**
 * External dependencies
 */
import { useEffect, useRef, useState } from '@wordpress/element';
import { CardElement, CardNumberElement } from '@stripe/react-stripe-js';

/**
 * Internal dependencies
 */
import { PAYMENT_METHOD_NAME } from './constants';
import {
	getStripeServerData,
	getErrorMessageForTypeAndCode,
} from '../stripe-utils';
import { usePaymentIntents } from './use-payment-intents';

/**
 * @typedef {import('@woocommerce/type-defs/registered-payment-method-props').EventRegistrationProps} EventRegistrationProps
 * @typedef {import('@woocommerce/type-defs/registered-payment-method-props').BillingDataProps} BillingDataProps
 * @typedef {import('@woocommerce/type-defs/registered-payment-method-props').EmitResponseProps} EmitResponseProps
 * @typedef {import('../stripe-utils/type-defs').Stripe} Stripe
 * @typedef {import('react').Dispatch<number>} SourceIdDispatch
 */

/**
 * A custom hook for the Stripe processing and event observer logic.
 *
 * @param {EventRegistrationProps}     eventRegistration Event registration functions.
 * @param {EmitResponseProps}          emitResponse      Various helpers for usage with observer
 *                                                       response objects.
 * @param {BillingDataProps}           billing           Various billing data items.
 * @param {number}                     sourceId          Current set stripe source id.
 * @param {SourceIdDispatch}           setSourceId       Setter for stripe source id.
 * @param {boolean}                    shouldSavePayment Whether to save the payment or not.
 * @param {Stripe}                     stripe            The stripe.js object.
 * @param {Object}                     elements          Stripe Elements object.
 *
 * @return {function(Object):Object} Returns a function for handling stripe error.
 */
export const useCheckoutSubscriptions = (
	eventRegistration,
	billing,
	sourceId,
	setSourceId,
	shouldSavePayment,
	emitResponse,
	stripe,
	elements
) => {
	const [ error, setError ] = useState( '' );
	const onStripeError = useRef( ( event ) => {
		return event;
	} );
	usePaymentIntents(
		stripe,
		eventRegistration.onCheckoutAfterProcessingWithSuccess,
		emitResponse
	);
	// hook into and register callbacks for events.
	useEffect( () => {
		onStripeError.current = ( event ) => {
			const type = event.error.type;
			const code = event.error.code || '';
			const message =
				getErrorMessageForTypeAndCode( type, code ) ??
				event.error.message;
			setError( error );
			return message;
		};
		const createSource = async ( ownerInfo ) => {
			const elementToGet = getStripeServerData().inline_cc_form
				? CardElement
				: CardNumberElement;
			return await stripe.createSource(
				elements.getElement( elementToGet ),
				{
					type: 'card',
					owner: ownerInfo,
				}
			);
		};
		const onSubmit = async () => {
			try {
				const { billingData } = billing;
				// if there's an error return that.
				if ( error ) {
					return {
						type: emitResponse.responseTypes.ERROR,
						message: error,
					};
				}
				// use token if it's set.
				if ( sourceId !== 0 ) {
					return {
						type: emitResponse.responseTypes.SUCCESS,
						meta: {
							paymentMethodData: {
								paymentMethod: PAYMENT_METHOD_NAME,
								paymentRequestType: 'cc',
								stripe_source: sourceId,
								shouldSavePayment,
							},
							billingData,
						},
					};
				}
				const ownerInfo = {
					address: {
						line1: billingData.address_1,
						line2: billingData.address_2,
						city: billingData.city,
						state: billingData.state,
						postal_code: billingData.postcode,
						country: billingData.country,
					},
				};
				if ( billingData.phone ) {
					ownerInfo.phone = billingData.phone;
				}
				if ( billingData.email ) {
					ownerInfo.email = billingData.email;
				}
				if ( billingData.first_name || billingData.last_name ) {
					ownerInfo.name = `${ billingData.first_name } ${ billingData.last_name }`;
				}

				const response = await createSource( ownerInfo );
				if ( response.error ) {
					return {
						type: emitResponse.responseTypes.ERROR,
						message: onStripeError.current( response ),
					};
				}
				setSourceId( response.source.id );
				return {
					type: emitResponse.responseTypes.SUCCESS,
					meta: {
						paymentMethodData: {
							stripe_source: response.source.id,
							paymentMethod: PAYMENT_METHOD_NAME,
							paymentRequestType: 'cc',
							shouldSavePayment,
						},
						billingData,
					},
				};
			} catch ( e ) {
				return {
					type: emitResponse.responseTypes.ERROR,
					message: e,
				};
			}
		};
		const onError = ( { processingResponse } ) => {
			if ( processingResponse?.paymentDetails?.errorMessage ) {
				return {
					type: emitResponse.responseTypes.ERROR,
					message: processingResponse.paymentDetails.errorMessage,
					messageContext: emitResponse.noticeContexts.PAYMENTS,
				};
			}
			// so we don't break the observers.
			return true;
		};
		const unsubscribeProcessing = eventRegistration.onPaymentProcessing(
			onSubmit
		);
		const unsubscribeAfterProcessing = eventRegistration.onCheckoutAfterProcessingWithError(
			onError
		);
		return () => {
			unsubscribeProcessing();
			unsubscribeAfterProcessing();
		};
	}, [
		eventRegistration.onPaymentProcessing,
		eventRegistration.onCheckoutAfterProcessingWithError,
		stripe,
		sourceId,
		billing.billingData,
		setSourceId,
		shouldSavePayment,
		error,
	] );
	return onStripeError.current;
};