import Fastlane from "./Connection/Fastlane";
import { log } from "./Helper/Debug";
import DomElementCollection from "./Components/DomElementCollection";
import ShippingView from "./Views/ShippingView";
import BillingView from "./Views/BillingView";
import CardView from "./Views/CardView";
import PayPalInsights from "./Insights/PayPalInsights";
import { disable, enable } from "../../../ppcp-button/resources/js/modules/Helper/ButtonDisabler";
import { getCurrentPaymentMethod } from "../../../ppcp-button/resources/js/modules/Helper/CheckoutMethodState";

class AxoManager {
    constructor(axoConfig, ppcpConfig) {
        this.axoConfig = axoConfig;
        this.ppcpConfig = ppcpConfig;

        this.initialized = false;
        this.fastlane = new Fastlane();
        this.$ = jQuery;

        this.hideGatewaySelection = false;

        this.status = {
            active: false,
            validEmail: false,
            hasProfile: false,
            useEmailWidget: this.useEmailWidget(),
            hasCard: false,
        };

        this.data = {
            email: null,
            billing: null,
            shipping: null,
            card: null,
        };

        this.states = this.axoConfig.woocommerce.states;

        this.el = new DomElementCollection();

        this.emailInput = document.querySelector(this.el.fieldBillingEmail.selector + ' input');

        this.styles = {
            root: {
                backgroundColorPrimary: '#ffffff'
            }
        };

        this.locale = 'en_us';

        this.registerEventHandlers();

        this.shippingView = new ShippingView(this.el.shippingAddressContainer.selector, this.el, this.states);
        this.billingView = new BillingView(this.el.billingAddressContainer.selector, this.el);
        this.cardView = new CardView(this.el.paymentContainer.selector + '-details', this.el, this);

        document.axoDebugSetStatus = (key, value) => {
            this.setStatus(key, value);
        }

        document.axoDebugObject = () => {
            return this;
        }

        if (
            this.axoConfig?.insights?.enabled &&
            this.axoConfig?.insights?.client_id &&
            this.axoConfig?.insights?.session_id
        ) {
            PayPalInsights.config(this.axoConfig?.insights?.client_id, { debug: true });
            PayPalInsights.setSessionId(this.axoConfig?.insights?.session_id);
            PayPalInsights.trackJsLoad();

            if (document.querySelector('.woocommerce-checkout')) {
                PayPalInsights.trackBeginCheckout({
                    amount: this.axoConfig?.insights?.amount,
                    page_type: 'checkout',
                    user_data: {
                        country: 'US',
                        is_store_member: false,
                    }
                });
            }
        }

        this.triggerGatewayChange();
    }

    registerEventHandlers() {
        this.$(document).on('change', 'input[name=payment_method]', (ev) => {
            const map = {
                'ppcp-axo-gateway': 'card',
                'ppcp-gateway': 'paypal',
            }

            PayPalInsights.trackSelectPaymentMethod({
                payment_method_selected: map[ev.target.value] || 'other',
                page_type: 'checkout'
            });
        });

        // Listen to Gateway Radio button changes.
        this.el.gatewayRadioButton.on('change', (ev) => {
            if (ev.target.checked) {
                this.activateAxo();
            } else {
                this.deactivateAxo();
            }
        });

        this.$(document).on('updated_checkout payment_method_selected', () => {
            this.triggerGatewayChange();
        });

        // On checkout form submitted.
        this.el.submitButton.on('click', () => {
            this.onClickSubmitButton();
            return false;
        })

        // Click change shipping address link.
        this.el.changeShippingAddressLink.on('click', async () => {
            if (this.status.hasProfile) {
                const { selectionChanged, selectedAddress } = await this.fastlane.profile.showShippingAddressSelector();

                if (selectionChanged) {
                    this.setShipping(selectedAddress);
                    this.shippingView.refresh();
                }
            }
        });

        // Click change billing address link.
        this.el.changeBillingAddressLink.on('click', async () => {
            if (this.status.hasProfile) {
                this.el.changeCardLink.trigger('click');
            }
        });

        // Click change card link.
        this.el.changeCardLink.on('click', async () => {
            const response = await this.fastlane.profile.showCardSelector();

            if (response.selectionChanged) {
                this.setCard(response.selectedCard);
                this.setBilling({
                    address: response.selectedCard.paymentSource.card.billingAddress
                });
            }
        });

        // Cancel "continuation" mode.
        this.el.showGatewaySelectionLink.on('click', async () => {
            this.hideGatewaySelection = false;
            this.$('.wc_payment_methods label').show();
            this.$('.wc_payment_methods input').show();
            this.cardView.refresh();
        });

        // Prevents sending checkout form when pressing Enter key on input field
        // and triggers customer lookup
        this.$('form.woocommerce-checkout input').on('keydown', async (ev) => {
            if (ev.key === 'Enter' && getCurrentPaymentMethod() === 'ppcp-axo-gateway') {
                ev.preventDefault();
                log(`Enter key attempt - emailInput: ${this.emailInput.value}`);
                log(`this.lastEmailCheckedIdentity: ${this.lastEmailCheckedIdentity}`);
                if (this.emailInput && this.lastEmailCheckedIdentity !== this.emailInput.value) {
                    await this.onChangeEmail();
                }
            }
        });

        // Clear last email checked identity when email field is focused.
        this.$('#billing_email_field input').on('focus', (ev) => {
            log(`Clear the last email checked: ${this.lastEmailCheckedIdentity}`);
            this.lastEmailCheckedIdentity = '';
        });

        // Listening to status update event
        document.addEventListener('axo_status_updated', (ev) => {
            const termsField = document.querySelector("[name='terms-field']");
            if (termsField) {
                const status = ev.detail;
                const shouldHide = status.active && status.validEmail === false && status.hasProfile === false;

                termsField.parentElement.style.display = shouldHide ? 'none' : 'block';
            }
        });
    }

    rerender() {
        /**
         * active              | 0 1 1 1
         * validEmail          | * 0 1 1
         * hasProfile          | * * 0 1
         * --------------------------------
         * defaultSubmitButton | 1 0 0 0
         * defaultEmailField   | 1 0 0 0
         * defaultFormFields   | 1 0 1 0
         * extraFormFields     | 0 0 0 1
         * axoEmailField       | 0 1 0 0
         * axoProfileViews     | 0 0 0 1
         * axoPaymentContainer | 0 0 1 1
         * axoSubmitButton     | 0 0 1 1
         */
        const scenario = this.identifyScenario(
            this.status.active,
            this.status.validEmail,
            this.status.hasProfile
        );

        log(`Scenario: ${JSON.stringify(scenario)}`);

        // Reset some elements to a default status.
        this.el.watermarkContainer.hide();

        if (scenario.defaultSubmitButton) {
            this.el.defaultSubmitButton.show();
        } else {
            this.el.defaultSubmitButton.hide();
        }

        if (scenario.defaultEmailField) {
            this.el.fieldBillingEmail.show();
        } else {
            this.el.fieldBillingEmail.hide();
        }

        if (scenario.defaultFormFields) {
            this.el.customerDetails.show();
            this.toggleLoaderAndOverlay(this.el.customerDetails, 'loader', 'ppcp-axo-overlay');
        } else {
            this.el.customerDetails.hide();
        }

        if (scenario.extraFormFields) {
            this.el.customerDetails.show();
            // Hiding of unwanted will be handled by the axoProfileViews handler.
        }

        if (scenario.axoEmailField) {
            this.showAxoEmailField();
            this.el.watermarkContainer.show();

            // Move watermark to after email.
            this.$(this.el.fieldBillingEmail.selector).append(
                this.$(this.el.watermarkContainer.selector)
            );

            // Add the submit button to the email field container.
            this.renderEmailSubmitNew();
        } else {
            this.el.emailWidgetContainer.hide();
            if (!scenario.defaultEmailField) {
                this.el.fieldBillingEmail.hide();
            }
        }

        if (scenario.axoProfileViews) {
            this.shippingView.activate();
            this.cardView.activate();

            if (this.status.hasCard) {
                this.billingView.activate();
            }

            // Move watermark to after shipping.
            this.$(this.el.shippingAddressContainer.selector).after(
                this.$(this.el.watermarkContainer.selector)
            );

            this.el.watermarkContainer.show();
        } else {
            this.shippingView.deactivate();
            this.billingView.deactivate();
            this.cardView.deactivate();
        }

        if (scenario.axoPaymentContainer) {
            this.el.paymentContainer.show();
            this.el.gatewayDescription.hide();
        } else {
            this.el.paymentContainer.hide();
        }

        if (scenario.axoSubmitButton) {
            this.el.submitButtonContainer.show();
        } else {
            this.el.submitButtonContainer.hide();
        }

        this.ensureBillingFieldsConsistency();
        this.ensureShippingFieldsConsistency();
    }

    identifyScenario(active, validEmail, hasProfile) {
        let response = {
            defaultSubmitButton: false,
            defaultEmailField: false,
            defaultFormFields: false,
            extraFormFields: false,
            axoEmailField: false,
            axoProfileViews: false,
            axoPaymentContainer: false,
            axoSubmitButton: false,
        }

        if (active && validEmail && hasProfile) {
            response.extraFormFields = true;
            response.axoProfileViews = true;
            response.axoPaymentContainer = true;
            response.axoSubmitButton = true;
            return response;
        }
        if (active && validEmail && !hasProfile) {
            response.defaultFormFields = true;
            response.axoEmailField = true;
            response.axoPaymentContainer = true;
            response.axoSubmitButton = true;
            return response;
        }
        if (active && !validEmail) {
            response.axoEmailField = true;
            return response;
        }
        if (!active) {
            response.defaultSubmitButton = true;
            response.defaultEmailField = true;
            response.defaultFormFields = true;
            return response;
        }
        throw new Error('Invalid scenario.');
    }

    ensureBillingFieldsConsistency() {
        const $billingFields = this.$('.woocommerce-billing-fields .form-row:visible');
        const $billingHeaders = this.$('.woocommerce-billing-fields h3');
        if (this.billingView.isActive()) {
            if ($billingFields.length) {
                $billingHeaders.show();
            } else {
                $billingHeaders.hide();
            }
        } else {
            $billingHeaders.show();
        }
    }

    ensureShippingFieldsConsistency() {
        const $shippingFields = this.$('.woocommerce-shipping-fields .form-row:visible');
        const $shippingHeaders = this.$('.woocommerce-shipping-fields h3');
        if (this.shippingView.isActive()) {
            if ($shippingFields.length) {
                $shippingHeaders.show();
            } else {
                $shippingHeaders.hide();
            }
        } else {
            $shippingHeaders.show();
        }
    }

    showAxoEmailField() {
        if (this.status.useEmailWidget) {
            this.el.emailWidgetContainer.show();
            this.el.fieldBillingEmail.hide();
        } else {
            this.el.emailWidgetContainer.hide();
            this.el.fieldBillingEmail.show();
        }
    }

    setStatus(key, value) {
        this.status[key] = value;

        log(`Status updated: ${JSON.stringify(this.status)}`);

        document.dispatchEvent(new CustomEvent("axo_status_updated", { detail: this.status }));

        this.rerender();
    }

    activateAxo() {
        this.initPlacements();
        this.initFastlane();
        this.setStatus('active', true);

        log(`Attempt on activation - emailInput: ${this.emailInput.value}`);
        log(`this.lastEmailCheckedIdentity: ${this.lastEmailCheckedIdentity}`);
        if (this.emailInput && this.lastEmailCheckedIdentity !== this.emailInput.value) {
            this.onChangeEmail();
        }
    }

    deactivateAxo() {
        this.setStatus('active', false);
    }

    initPlacements() {
        const wrapper = this.el.axoCustomerDetails;

        // Customer details container.
        if (!document.querySelector(wrapper.selector)) {
            document.querySelector(wrapper.anchorSelector).insertAdjacentHTML('afterbegin', `
                <div id="${wrapper.id}" class="${wrapper.className}"></div>
            `);
        }

        const wrapperElement = document.querySelector(wrapper.selector);

        // Billing view container.
        const bc = this.el.billingAddressContainer;
        if (!document.querySelector(bc.selector)) {
            wrapperElement.insertAdjacentHTML('beforeend', `
                <div id="${bc.id}" class="${bc.className}"></div>
            `);
        }

        // Shipping view container.
        const sc = this.el.shippingAddressContainer;
        if (!document.querySelector(sc.selector)) {
            wrapperElement.insertAdjacentHTML('beforeend', `
                <div id="${sc.id}" class="${sc.className}"></div>
            `);
        }

        // Watermark container
        const wc = this.el.watermarkContainer;
        if (!document.querySelector(wc.selector)) {
            this.emailInput.insertAdjacentHTML('afterend', `
                <div class="${wc.className}" id="${wc.id}"></div>
            `);
        }

        // Payment container
        const pc = this.el.paymentContainer;
        if (!document.querySelector(pc.selector)) {
            const gatewayPaymentContainer = document.querySelector('.payment_method_ppcp-axo-gateway');
            gatewayPaymentContainer.insertAdjacentHTML('beforeend', `
                <div id="${pc.id}" class="${pc.className} axo-hidden">
                    <div id="${pc.id}-form" class="${pc.className}-form"></div>
                    <div id="${pc.id}-details" class="${pc.className}-details"></div>
                </div>
            `);
        }

        if (this.useEmailWidget()) {
            // Display email widget.
            const ec = this.el.emailWidgetContainer;
            if (!document.querySelector(ec.selector)) {
                wrapperElement.insertAdjacentHTML('afterbegin', `
                    <div id="${ec.id}" class="${ec.className}">
                    --- EMAIL WIDGET PLACEHOLDER ---
                    </div>
                `);
            }

        } else {
            // Move email to the AXO container.
            let emailRow = document.querySelector(this.el.fieldBillingEmail.selector);
            wrapperElement.prepend(emailRow);
        }
    }

    async initFastlane() {
        if (this.initialized) {
            return;
        }
        this.initialized = true;

        await this.connect();
        await this.renderWatermark(true, () => {
            this.renderEmailSubmit();
        });
        this.watchEmail();
    }

    async connect() {
        if (this.axoConfig.environment.is_sandbox) {
            window.localStorage.setItem('axoEnv', 'sandbox');
        }

        await this.fastlane.connect({
            locale: this.locale,
            styles: this.styles
        });

        this.fastlane.setLocale('en_us');
    }

    triggerGatewayChange() {
        this.el.gatewayRadioButton.trigger('change');
    }

    async renderWatermark(includeAdditionalInfo = true, callback) {
        (await this.fastlane.FastlaneWatermarkComponent({
            includeAdditionalInfo
        })).render(this.el.watermarkContainer.selector);

        this.toggleWatermarkLoading(this.el.watermarkContainer, 'ppcp-axo-watermark-loading', 'loader');

        // Call the callback if provided
        if (callback) {
            callback();
        }
    }

    async renderEmailSubmitNew() {
        const billingEmailSubmitButton = this.el.billingEmailSubmitButton;
        if (!document.querySelector(billingEmailSubmitButton.selector)) {

        }

        const submitButton = this.el.billingEmailSubmitButton.selector;
        // submitButton.innerText = this.axoConfig.billing_email_button_text;

        const submitButtonSpinner = this.el.billingEmailSubmitButtonSpinner.selector;
        console.log(submitButton);
    }

    async renderEmailSubmit() {
        // Create the submit button element
        const submitButton = document.createElement('button');
        submitButton.type = 'button';
        submitButton.innerText = this.axoConfig.billing_email_button_text;
        submitButton.className = 'email-submit-button'; // Add a class for styling if needed

        // Create the spinner element
        const spinner = document.createElement('span');
        spinner.className = 'loader ppcp-axo-overlay'; // Use the native loader class
        spinner.style.display = 'none'; // Initially hidden

        // Append the spinner to the button
        submitButton.appendChild(spinner);

        // Add an event listener to handle the button click
        submitButton.addEventListener('click', async () => {
            const emailInput = document.querySelector(this.el.fieldBillingEmail.selector + ' input');
            if (emailInput && emailInput.checkValidity()) {
                if (this.lastEmailCheckedIdentity !== emailInput.value) {
                    log(`Submit button clicked - emailInput: ${emailInput.value}`);

                    // Show the spinner, add the class to adjust padding and disable the button
                    spinner.style.display = 'inline-block';
                    submitButton.disabled = true;


                    try {
                        await this.onChangeEmail();
                    } finally {
                        // Hide the spinner and re-enable the button after the lookup is complete
                        spinner.style.display = 'none';
                        submitButton.disabled = false;
                    }
                }
            } else {
                emailInput.reportValidity(); // Trigger the HTML5 validation message
                log('Invalid or empty email input.');
            }
        });

        // Append the button inside the wrapper of the billing email input field
        const emailFieldContainer = document.querySelector(this.el.fieldBillingEmail.selector);
        if (emailFieldContainer) {
            const inputWrapper = emailFieldContainer.querySelector('.woocommerce-input-wrapper');
            if (inputWrapper) {
                // Ensure the email input has the required attribute
                const emailInput = inputWrapper.querySelector('input');
                emailInput.setAttribute('required', 'required');
                emailInput.style.flex = '1'; // Make the input take the remaining space
                emailInput.style.marginRight = '10px'; // Ensure the spacing is consistent

                // Remove any existing loader if present
                const existingLoader = inputWrapper.querySelector('.loader');
                if (existingLoader) {
                    existingLoader.remove();
                }

                // Append the submit button to the input wrapper
                inputWrapper.appendChild(submitButton);

                // Force a reflow to apply the transition
                submitButton.offsetHeight;

                // Add the class to trigger the animation
                inputWrapper.classList.add('show-button');
            }
        }
    }

    async onChangeEmail() {
        this.clearData();

        if (!this.status.active) {
            log('Email checking skipped, AXO not active.');
            return;
        }

        if (!this.emailInput) {
            log('Email field not initialized.');
            return;
        }

        log(`Email changed: ${this.emailInput ? this.emailInput.value : '<empty>'}`);

        this.$(this.el.paymentContainer.selector + '-detail').html('');
        this.$(this.el.paymentContainer.selector + '-form').html('');

        this.setStatus('validEmail', false);
        this.setStatus('hasProfile', false);

        this.hideGatewaySelection = false;

        this.lastEmailCheckedIdentity = this.emailInput.value;

        if (!this.emailInput.value || !this.emailInput.checkValidity()) {
            log('The email address is not valid.');
            return;
        }

        this.data.email = this.emailInput.value;
        this.billingView.setData(this.data);

        if (!this.fastlane.identity) {
            log('Not initialized.');
            return;
        }

        PayPalInsights.trackSubmitCheckoutEmail({
            page_type: 'checkout'
        });

        this.disableGatewaySelection();

        const submitButton = document.querySelector('.email-submit-button');
        const spinner = submitButton.querySelector('.loader');
        if (submitButton && spinner) {
            // Show the spinner and disable the button
            spinner.style.display = 'inline-block';
            submitButton.classList.add('show-spinner');
            submitButton.disabled = true;
        }

        setTimeout(async () => {
            console.log("Delayed for 1 milisecond.");
            await this.lookupCustomerByEmail();

            // Hide the spinner and re-enable the button after the lookup is complete
            if (submitButton && spinner) {
                spinner.style.display = 'none';
                submitButton.classList.remove('show-spinner');
                submitButton.disabled = false;
            }

            this.enableGatewaySelection();
        }, 1);
    }


    watchEmail() {
        if (this.useEmailWidget()) {
            // TODO
        } else {
            this.emailInput.addEventListener('change', async () => {
                log(`Change event attempt - emailInput: ${this.emailInput.value}`);
                log(`this.lastEmailCheckedIdentity: ${this.lastEmailCheckedIdentity}`);
                if (this.emailInput && this.lastEmailCheckedIdentity !== this.emailInput.value) {
                    this.onChangeEmail();
                }
            });

            log(`Last, this.emailInput.value attempt - emailInput: ${this.emailInput.value}`);
            log(`this.lastEmailCheckedIdentity: ${this.lastEmailCheckedIdentity}`);
            if (this.emailInput.value) {
                this.onChangeEmail();
            }
        }
    }

    async onChangeEmail() {
        this.clearData();

        if (!this.status.active) {
            log('Email checking skipped, AXO not active.');
            return;
        }

        if (!this.emailInput) {
            log('Email field not initialized.');
            return;
        }

        log(`Email changed: ${this.emailInput ? this.emailInput.value : '<empty>'}`);

        this.$(this.el.paymentContainer.selector + '-detail').html('');
        this.$(this.el.paymentContainer.selector + '-form').html('');

        this.setStatus('validEmail', false);
        this.setStatus('hasProfile', false);

        this.hideGatewaySelection = false;

        this.lastEmailCheckedIdentity = this.emailInput.value;

        if (!this.emailInput.value || !this.emailInput.checkValidity()) {
            log('The email address is not valid.');
            return;
        }

        this.data.email = this.emailInput.value;
        this.billingView.setData(this.data);

        if (!this.fastlane.identity) {
            log('Not initialized.');
            return;
        }

        PayPalInsights.trackSubmitCheckoutEmail({
            page_type: 'checkout'
        });

        this.disableGatewaySelection();

        const submitButton = document.querySelector('.email-submit-button');
        const spinner = submitButton.querySelector('.loader');
        if (submitButton && spinner) {
            // Show the spinner and disable the button
            spinner.style.display = 'inline-block';
            submitButton.disabled = true;
        }

        setTimeout(async () => {
            console.log("Delayed for 1 milisecond.");
            await this.lookupCustomerByEmail();

            // Hide the spinner and re-enable the button after the lookup is complete
            if (submitButton && spinner) {
                spinner.style.display = 'none';
                submitButton.disabled = false;
            }

            this.enableGatewaySelection();
        }, 1);
    }

    async lookupCustomerByEmail() {
        const lookupResponse = await this.fastlane.identity.lookupCustomerByEmail(this.emailInput.value);

        log(`lookupCustomerByEmail: ${JSON.stringify(lookupResponse)}`);

        if (lookupResponse.customerContextId) {
            // Email is associated with a Connect profile or a PayPal member.
            // Authenticate the customer to get access to their profile.
            log('Email is associated with a Connect profile or a PayPal member');

            const authResponse = await this.fastlane.identity.triggerAuthenticationFlow(lookupResponse.customerContextId);

            log(`AuthResponse - triggerAuthenticationFlow: ${JSON.stringify(authResponse)}`);

            if (authResponse.authenticationState === 'succeeded') {
                const shippingData = authResponse.profileData.shippingAddress;
                if (shippingData) {
                    this.setShipping(shippingData);
                }

                if (authResponse.profileData.card) {
                    this.setStatus('hasCard', true);
                } else {
                    this.cardComponent = (await this.fastlane.FastlaneCardComponent(
                        this.cardComponentData()
                    )).render(this.el.paymentContainer.selector + '-form');
                }

                const cardBillingAddress = authResponse.profileData?.card?.paymentSource?.card?.billingAddress;
                if (cardBillingAddress) {
                    this.setCard(authResponse.profileData.card);

                    const billingData = {
                        address: cardBillingAddress,
                    };
                    const phoneNumber = authResponse.profileData?.shippingAddress?.phoneNumber?.nationalNumber ?? '';
                    if (phoneNumber) {
                        billingData.phoneNumber = phoneNumber
                    }

                    this.setBilling(billingData);
                }

                this.setStatus('validEmail', true);
                this.setStatus('hasProfile', true);

                this.hideGatewaySelection = true;
                this.$('.wc_payment_methods label').hide();
                this.$('.wc_payment_methods input').hide();

                await this.renderWatermark(false);

                this.rerender();

            } else {
                // authentication failed or canceled by the customer
                // set status as guest customer
                log("Authentication Failed")

                this.setStatus('validEmail', true);
                this.setStatus('hasProfile', false);

                await this.renderWatermark(true);

                this.cardComponent = (await this.fastlane.FastlaneCardComponent(
                    this.cardComponentData()
                )).render(this.el.paymentContainer.selector + '-form');
            }

        } else {
            // No profile found with this email address.
            // This is a guest customer.
            log('No profile found with this email address.');

            this.setStatus('validEmail', true);
            this.setStatus('hasProfile', false);

            await this.renderWatermark(true);

            this.cardComponent = (await this.fastlane.FastlaneCardComponent(
                this.cardComponentData()
            )).render(this.el.paymentContainer.selector + '-form');
        }
    }

    disableGatewaySelection() {
        this.$('.wc_payment_methods input').prop('disabled', true);
    }

    enableGatewaySelection() {
        this.$('.wc_payment_methods input').prop('disabled', false);
    }

    clearData() {
        this.data = {
            email: null,
            billing: null,
            shipping: null,
            card: null,
        };
    }

    setShipping(shipping) {
        this.data.shipping = shipping;
        this.shippingView.setData(this.data);
    }

    setBilling(billing) {
        this.data.billing = billing;
        this.billingView.setData(this.data);
    }

    setCard(card) {
        this.data.card = card;
        this.cardView.setData(this.data);
    }

    onClickSubmitButton() {
        // TODO: validate data.

        if (this.data.card) { // Ryan flow
            log('Starting Ryan flow.');

            this.$('#ship-to-different-address-checkbox').prop('checked', 'checked');

            let data = {};
            this.billingView.toSubmitData(data);
            this.shippingView.toSubmitData(data);
            this.cardView.toSubmitData(data);

            this.ensureBillingPhoneNumber(data);

            log(`Ryan flow - submitted nonce: ${this.data.card.id}`)

            this.submit(this.data.card.id, data);

        } else { // Gary flow
            log('Starting Gary flow.');

            try {
                this.cardComponent.getPaymentToken(
                    this.tokenizeData()
                ).then((response) => {
                    log(`Gary flow - submitted nonce: ${response.id}`)
                    this.submit(response.id);
                });
            } catch (e) {
                alert('Error tokenizing data.');
                log(`Error tokenizing data. ${e.message}`, 'error');
            }
        }
    }

    cardComponentData() {
        return {
            fields: {
                cardholderName: {
                    enabled: this.axoConfig.name_on_card === '1'
                }
            },
            styles: this.deleteKeysWithEmptyString(this.axoConfig.style_options)
        }
    }

    tokenizeData() {
        return {
            cardholderName: {
                fullName: this.billingView.fullName()
            },
            billingAddress: {
                addressLine1: this.billingView.inputValue('street1'),
                addressLine2: this.billingView.inputValue('street2'),
                adminArea1: this.billingView.inputValue('stateCode'),
                adminArea2: this.billingView.inputValue('city'),
                postalCode: this.billingView.inputValue('postCode'),
                countryCode: this.billingView.inputValue('countryCode'),
            }
        }
    }

    submit(nonce, data) {
        // Send the nonce and previously captured device data to server to complete checkout
        if (!this.el.axoNonceInput.get()) {
            this.$('form.woocommerce-checkout').append(`<input type="hidden" id="${this.el.axoNonceInput.id}" name="axo_nonce" value="" />`);
        }

        this.el.axoNonceInput.get().value = nonce;

        PayPalInsights.trackEndCheckout({
            amount: this.axoConfig?.insights?.amount,
            page_type: 'checkout',
            payment_method_selected: 'card',
            user_data: {
                country: 'US',
                is_store_member: false,
            }
        });

        if (data) {
            // Ryan flow.
            const form = document.querySelector('form.woocommerce-checkout');
            const formData = new FormData(form);

            this.showLoading();

            // Fill in form data.
            Object.keys(data).forEach((key) => {
                formData.set(key, data[key]);
            });

            // Set type of user (Ryan) to be received on WC gateway process payment request.
            formData.set('fastlane_member', true);

            fetch(wc_checkout_params.checkout_url, { // TODO: maybe create a new endpoint to process_payment.
                method: "POST",
                body: formData
            })
                .then(response => response.json())
                .then(responseData => {
                    if (responseData.result === 'failure') {
                        if (responseData.messages) {
                            const $notices = this.$('.woocommerce-notices-wrapper').eq(0);
                            $notices.html(responseData.messages);
                            this.$('html, body').animate({
                                scrollTop: $notices.offset().top
                            }, 500);
                        }

                        log(`Error sending checkout form. ${responseData}`, 'error');

                        this.hideLoading();
                        return;
                    }
                    if (responseData.redirect) {
                        window.location.href = responseData.redirect;
                    }
                })
                .catch(error => {
                    log(`Error sending checkout form. ${error.message}`, 'error');

                    this.hideLoading();
                });

        } else {
            // Gary flow.
            this.el.defaultSubmitButton.click();
        }

    }

    showLoading() {
        const submitContainerSelector = '.woocommerce-checkout-payment';
        jQuery('form.woocommerce-checkout').append('<div class="blockUI blockOverlay" style="z-index: 1000; border: medium; margin: 0px; padding: 0px; width: 100%; height: 100%; top: 0px; left: 0px; background: rgb(255, 255, 255); opacity: 0.6; cursor: default; position: absolute;"></div>');
        disable(submitContainerSelector);
    }

    hideLoading() {
        const submitContainerSelector = '.woocommerce-checkout-payment';
        jQuery('form.woocommerce-checkout .blockOverlay').remove();
        enable(submitContainerSelector);
    }

    useEmailWidget() {
        return this.axoConfig?.widgets?.email === 'use_widget';
    }

    deleteKeysWithEmptyString = (obj) => {
        for (let key of Object.keys(obj)) {
            if (obj[key] === '') {
                delete obj[key];
            }
            else if (typeof obj[key] === 'object') {
                obj[key] = this.deleteKeysWithEmptyString(obj[key]);
                if (Object.keys(obj[key]).length === 0) delete obj[key];
            }
        }

        return Array.isArray(obj) ? obj.filter(val => val) : obj;
    }

    ensureBillingPhoneNumber(data) {
        if (data.billing_phone === '') {
            let phone = '';
            const cc = this.data?.shipping?.phoneNumber?.countryCode;
            const number = this.data?.shipping?.phoneNumber?.nationalNumber;

            if (cc) {
                phone = `+${cc} `;
            }
            phone += number;

            data.billing_phone = phone;
        }
    }

    toggleLoaderAndOverlay(element, loaderClass, overlayClass) {
        const loader = document.querySelector(`${element.selector} .${loaderClass}`);
        const overlay = document.querySelector(`${element.selector} .${overlayClass}`);
        if (loader) {
            loader.classList.toggle(loaderClass);
        }
        if (overlay) {
            overlay.classList.toggle(overlayClass);
        }
    }

    toggleWatermarkLoading(container, loadingClass, loaderClass) {
        const watermarkLoading = document.querySelector(`${container.selector}.${loadingClass}`);
        const watermarkLoader = document.querySelector(`${container.selector}.${loaderClass}`);
        if (watermarkLoading) {
            watermarkLoading.classList.toggle(loadingClass);
        }
        if (watermarkLoader) {
            watermarkLoader.classList.toggle(loaderClass);
        }
    }
}

export default AxoManager;