import { loadScript } from '@paypal/paypal-js';
import { debounce } from './helper/debounce';
import {
	buttonRefreshTriggerFactory,
	buttonSettingsGetterFactory,
} from './helper/preview-button';
import Renderer from '../../../ppcp-button/resources/js/modules/Renderer/Renderer';
import MessageRenderer from '../../../ppcp-button/resources/js/modules/Renderer/MessageRenderer';
import {
	setVisibleByClass,
	isVisible,
} from '../../../ppcp-button/resources/js/modules/Helper/Hiding';
import widgetBuilder from '../../../ppcp-button/resources/js/modules/Renderer/WidgetBuilder';

document.addEventListener( 'DOMContentLoaded', () => {
	function disableAll( nodeList ) {
		nodeList.forEach( ( node ) => node.setAttribute( 'disabled', 'true' ) );
	}

	const disabledCheckboxes = document.querySelectorAll(
		'.ppcp-disabled-checkbox'
	);

	disableAll( disabledCheckboxes );

	const form = jQuery( '#mainform' );

	const payLaterButtonInput = document.querySelector(
		'#ppcp-pay_later_button_enabled'
	);

	initializePayLaterPreview();

	const separateCardButtonCheckbox = document.querySelector(
		'#ppcp-allow_card_button_gateway'
	);
	if ( separateCardButtonCheckbox ) {
		separateCardButtonCheckbox.addEventListener( 'change', () => {
			setVisibleByClass(
				'#field-button_layout',
				! separateCardButtonCheckbox.checked,
				'hide'
			);
			setVisibleByClass(
				'#field-button_general_layout',
				! separateCardButtonCheckbox.checked,
				'hide'
			);
		} );
	}

	[
		{
			layoutSelector: '#ppcp-button_layout',
			taglineSelector: '#field-button_tagline',
			canHaveSeparateButtons: true,
		},
		{
			layoutSelector: '#ppcp-button_general_layout',
			taglineSelector: '#field-button_general_tagline',
			canHaveSeparateButtons: true,
		},
		{
			layoutSelector: '#ppcp-button_product_layout',
			taglineSelector: '#field-button_product_tagline',
		},
		{
			layoutSelector: '#ppcp-button_cart_layout',
			taglineSelector: '#field-button_cart_tagline',
		},
		{
			layoutSelector: '#ppcp-button_mini-cart_layout',
			taglineSelector: '#field-button_mini-cart_tagline',
		},
	].forEach( ( location ) => {
		const layoutSelect = document.querySelector( location.layoutSelector );
		const taglineField = document.querySelector( location.taglineSelector );
		if ( layoutSelect && taglineField ) {
			const setTaglineFieldVisibility = () => {
				const supportsTagline =
					jQuery( layoutSelect ).val() === 'horizontal' &&
					( ! location.canHaveSeparateButtons ||
						( separateCardButtonCheckbox &&
							! separateCardButtonCheckbox.checked ) ) &&
					isVisible( layoutSelect.parentElement );
				setVisibleByClass( taglineField, supportsTagline, 'hide' );
			};
			setTaglineFieldVisibility();
			// looks like only jQuery event fires for WC selects
			jQuery( layoutSelect ).change( setTaglineFieldVisibility );
			if (
				location.canHaveSeparateButtons &&
				separateCardButtonCheckbox
			) {
				separateCardButtonCheckbox.addEventListener(
					'change',
					setTaglineFieldVisibility
				);
			}
		}
	} );

	function initializePayLaterPreview() {
		if ( ! payLaterButtonInput ) {
			return;
		}

		const payLaterButtonPreview = document.querySelector(
			'.ppcp-button-preview[data-ppcp-preview-block="paylater"]'
		);

		if ( ! payLaterButtonPreview ) {
			return;
		}

		if ( ! payLaterButtonInput.checked ) {
			payLaterButtonPreview.classList.add( 'disabled' );
		}

		if (
			payLaterButtonInput.classList.contains( 'ppcp-disabled-checkbox' )
		) {
			payLaterButtonPreview.style.display = 'none';
		}

		payLaterButtonInput.addEventListener( 'click', () => {
			payLaterButtonPreview.classList.remove( 'disabled' );

			if ( ! payLaterButtonInput.checked ) {
				payLaterButtonPreview.classList.add( 'disabled' );
			}
		} );
	}

	function createButtonPreview( settingsCallback ) {
		const render = ( settings ) => {
			const wrapperSelector =
				Object.values( settings.separate_buttons ).length > 0
					? Object.values( settings.separate_buttons )[ 0 ].wrapper
					: settings.button.wrapper;
			const wrapper = document.querySelector( wrapperSelector );
			if ( ! wrapper ) {
				return;
			}
			wrapper.innerHTML = '';

			const renderer = new Renderer(
				null,
				settings,
				( data, actions ) => actions.reject(),
				null
			);

			try {
				renderer.render( {} );
				jQuery( document ).trigger(
					'ppcp_paypal_render_preview',
					settings
				);
			} catch ( err ) {
				console.error( err );
			}
		};

		renderPreview( settingsCallback, render );
	}

	function currentTabId() {
		const params = new URLSearchParams( location.search );
		return params.has( 'ppcp-tab' )
			? params.get( 'ppcp-tab' )
			: params.get( 'section' );
	}

	function shouldShowPayLaterButton() {
		const payLaterButtonLocations = document.querySelector(
			'[name="ppcp[pay_later_button_locations][]"]'
		);

		if ( ! payLaterButtonInput || ! payLaterButtonLocations ) {
			return PayPalCommerceGatewaySettings.is_pay_later_button_enabled;
		}

		return (
			payLaterButtonInput.checked &&
			payLaterButtonLocations.selectedOptions.length > 0
		);
	}

	function shouldDisableCardButton() {
		return (
			PayPalCommerceGatewaySettings.is_acdc_enabled ||
			jQuery( '#ppcp-allow_card_button_gateway' ).is( ':checked' )
		);
	}

	function getPaypalScriptSettings() {
		const disableFundingInput = jQuery(
			'[name="ppcp[disable_funding][]"]'
		);
		let disabledSources =
			disableFundingInput.length > 0
				? disableFundingInput.val()
				: PayPalCommerceGatewaySettings.disabled_sources;
		const payLaterButtonPreview = jQuery( '#ppcpPayLaterButtonPreview' );
		const settings = {
			'client-id': PayPalCommerceGatewaySettings.client_id,
			currency: PayPalCommerceGatewaySettings.currency,
			'integration-date': PayPalCommerceGatewaySettings.integration_date,
			components: PayPalCommerceGatewaySettings.components,
			'enable-funding': [ 'venmo', 'paylater' ],
		};

		if ( PayPalCommerceGatewaySettings.environment === 'sandbox' ) {
			settings[ 'buyer-country' ] = PayPalCommerceGatewaySettings.country;
		}

		if ( payLaterButtonPreview?.length ) {
			disabledSources = Object.keys(
				PayPalCommerceGatewaySettings.all_funding_sources
			);
		}

		if ( ! shouldShowPayLaterButton() ) {
			disabledSources = disabledSources.concat( 'credit' );
		}

		if ( shouldDisableCardButton() ) {
			const standardCardButtonInput = document.querySelector(
				'#woocommerce_ppcp-card-button-gateway_enabled'
			);

			if ( standardCardButtonInput ) {
				standardCardButtonInput.disabled = true;
			}

			disabledSources = disabledSources.concat( 'card' );
		}

		if ( disabledSources?.length ) {
			settings[ 'disable-funding' ] = disabledSources;
		}

		const smartButtonLocale = document.getElementById(
			'ppcp-smart_button_language'
		);
		if (
			smartButtonLocale?.length > 0 &&
			smartButtonLocale?.value !== ''
		) {
			settings.locale = smartButtonLocale.value;
		}

		return settings;
	}

	function loadPaypalScript( settings, onLoaded = () => {} ) {
		loadScript( JSON.parse( JSON.stringify( settings ) ) ) // clone the object to prevent modification
			.then( ( paypal ) => {
				widgetBuilder.setPaypal( paypal );

				document.dispatchEvent(
					new CustomEvent( 'ppcp_paypal_script_loaded' )
				);

				onLoaded( paypal );
			} )
			.catch( ( error ) =>
				console.error(
					'failed to load the PayPal JS SDK script',
					error
				)
			);
	}

	function getButtonSettings( wrapperSelector, fields, apm = null ) {
		const layoutElement = jQuery( fields.layout );
		const layout =
			layoutElement.length && layoutElement.is( ':visible' )
				? layoutElement.val()
				: 'vertical';
		const style = {
			color: jQuery( fields.color ).val(),
			shape: jQuery( fields.shape ).val(),
			label: jQuery( fields.label ).val(),
			tagline:
				layout === 'horizontal' &&
				jQuery( fields.tagline ).is( ':checked' ),
			layout,
		};
		if ( 'height' in fields ) {
			style.height = parseInt( jQuery( fields.height ).val() );
		}
		if ( 'poweredby_tagline' in fields ) {
			style.layout = jQuery( fields.poweredby_tagline ).is( ':checked' )
				? 'vertical'
				: 'horizontal';
		}
		const settings = {
			button: {
				wrapper: wrapperSelector,
				style,
			},
			separate_buttons: {},
		};
		if ( apm ) {
			settings.separate_buttons[ apm ] = {
				wrapper: wrapperSelector,
				style,
			};
			settings.button.wrapper = null;
		}
		return settings;
	}

	function createMessagesPreview( settingsCallback ) {
		const render = ( settings ) => {
			let wrapper = document.querySelector( settings.wrapper );
			if ( ! wrapper ) {
				return;
			}
			// looks like .innerHTML = '' is not enough, PayPal somehow renders with old style
			const parent = wrapper.parentElement;
			parent.removeChild( wrapper );
			wrapper = document.createElement( 'div' );
			wrapper.setAttribute( 'id', settings.wrapper.replace( '#', '' ) );
			parent.appendChild( wrapper );

			const messageRenderer = new MessageRenderer( settings );

			try {
				messageRenderer.renderWithAmount( settings.amount );
			} catch ( err ) {
				console.error( err );
			}
		};

		renderPreview( settingsCallback, render );
	}

	function getMessageSettings( wrapperSelector, fields ) {
		const layout = jQuery( fields.layout ).val();
		const style = {
			layout,
			logo: {
				type: jQuery( fields.logo_type ).val(),
				position: jQuery( fields.logo_position ).val(),
			},
			text: {
				color: jQuery( fields.text_color ).val(),
			},
			color: jQuery( fields.flex_color ).val(),
			ratio: jQuery( fields.flex_ratio ).val(),
		};

		return {
			wrapper: wrapperSelector,
			style,
			amount: 30,
			placement: 'product',
		};
	}

	function renderPreview( settingsCallback, render ) {
		let oldSettings = settingsCallback();

		form.on(
			'change',
			':input',
			debounce( () => {
				const newSettings = settingsCallback();
				if (
					JSON.stringify( oldSettings ) ===
					JSON.stringify( newSettings )
				) {
					return;
				}

				render( newSettings );

				oldSettings = newSettings;
			}, 300 )
		);

		jQuery( document ).on( 'ppcp_paypal_script_loaded', () => {
			oldSettings = settingsCallback();

			render( oldSettings );
		} );

		render( oldSettings );
	}

	function getButtonDefaultSettings( wrapperSelector ) {
		const style = {
			color: 'gold',
			shape: 'pill',
			label: 'paypal',
			tagline: false,
			layout: 'vertical',
		};
		return {
			button: {
				wrapper: wrapperSelector,
				style,
			},
			separate_buttons: {},
		};
	}

	const previewElements = document.querySelectorAll( '.ppcp-preview' );
	if ( previewElements.length ) {
		let oldScriptSettings = getPaypalScriptSettings();

		form.on(
			'change',
			':input',
			debounce( () => {
				const newSettings = getPaypalScriptSettings();
				if (
					JSON.stringify( oldScriptSettings ) ===
					JSON.stringify( newSettings )
				) {
					return;
				}

				loadPaypalScript( newSettings );

				oldScriptSettings = newSettings;
			}, 1000 )
		);

		loadPaypalScript( oldScriptSettings, () => {
			const payLaterMessagingLocations = [
				'product',
				'cart',
				'checkout',
				'shop',
				'home',
				'general',
			];
			const paypalButtonLocations = [
				'product',
				'cart',
				'checkout',
				'mini-cart',
				'cart-block',
				'checkout-block-express',
				'general',
			];

			// Default preview buttons; on "Standard Payments" tab.
			paypalButtonLocations.forEach( ( location ) => {
				const inputNamePrefix =
					location === 'checkout'
						? '#ppcp-button'
						: '#ppcp-button_' + location;
				const wrapperName = location
					.split( '-' )
					.map( ( s ) => s.charAt( 0 ).toUpperCase() + s.slice( 1 ) )
					.join( '' );
				const fields = {
					color: inputNamePrefix + '_color',
					shape: inputNamePrefix + '_shape',
					label: inputNamePrefix + '_label',
					tagline: inputNamePrefix + '_tagline',
					layout: inputNamePrefix + '_layout',
				};

				if ( document.querySelector( inputNamePrefix + '_height' ) ) {
					fields.height = inputNamePrefix + '_height';
				}

				createButtonPreview( () =>
					getButtonSettings(
						'#ppcp' + wrapperName + 'ButtonPreview',
						fields
					)
				);
			} );

			/**
			 * Inspect DOM to find APM button previews; on tabs like "Advanced Card Payments".
			 *
			 * How it works:
			 *
			 * 1. Add a <div> to hold the preview button to the settings page:
			 *    - `id="ppcp[NAME]ButtonPreview"`
			 *    - `data-ppc-apm-preview="[NAME]"`
			 * 2. Mark all fields that are relevant for the preview button:
			 *    - custom_attribute: `data-ppcp-apm-name="[NAME]"`
			 *    - custom_attribute: `data-ppcp-field-name="[FIELD]"`
			 *
			 * This block will find all marked input fields and trigger a re-render of the
			 * preview button when one of those fields value changes.
			 *
			 * Example: See the ppcp-google-pay "extensions.php" file.
			 */
			document
				.querySelectorAll( '[data-ppcp-preview-block]' )
				.forEach( ( item ) => {
					const apmName = item.dataset.ppcpPreviewBlock;
					const getSettings = buttonSettingsGetterFactory( apmName );
					const renderButtonPreview =
						buttonRefreshTriggerFactory( apmName );

					renderPreview( getSettings, renderButtonPreview );
				} );

			payLaterMessagingLocations.forEach( ( location ) => {
				const inputNamePrefix =
					'#ppcp-pay_later_' + location + '_message';
				const wrapperName =
					location.charAt( 0 ).toUpperCase() + location.slice( 1 );
				createMessagesPreview( () =>
					getMessageSettings(
						'#ppcp' + wrapperName + 'MessagePreview',
						{
							layout: inputNamePrefix + '_layout',
							logo_type: inputNamePrefix + '_logo',
							logo_position: inputNamePrefix + '_position',
							text_color: inputNamePrefix + '_color',
							flex_color: inputNamePrefix + '_flex_color',
							flex_ratio: inputNamePrefix + '_flex_ratio',
						}
					)
				);
			} );

			createButtonPreview( () =>
				getButtonDefaultSettings( '#ppcpPayLaterButtonPreview' )
			);

			const apmFieldPrefix = '#ppcp-card_button_';
			createButtonPreview( () =>
				getButtonSettings(
					'#ppcpCardButtonPreview',
					{
						color: apmFieldPrefix + 'color',
						shape: apmFieldPrefix + 'shape',
						poweredby_tagline: apmFieldPrefix + 'poweredby_tagline',
					},
					'card'
				)
			);
		} );
	}

	// Logic to handle the "Check available features" button.
	( ( $, props, anchor ) => {
		const $btn = $( props.button );

		const printStatus = ( message, showSpinner ) => {
			const html =
				message +
				( showSpinner
					? '<span class="spinner is-active" style="float: none;"></span>'
					: '' );
			$btn.siblings( '.ppcp-status-text' ).html( html );
		};

		// If the reload comes from a successful refresh.
		if (
			typeof URLSearchParams === 'function' &&
			new URLSearchParams( window.location.search ).get(
				'feature-refreshed'
			)
		) {
			printStatus(
				'<span class="success">✔️ ' + props.messages.success + '</span>'
			);
			$( 'html, body' ).animate(
				{
					scrollTop: $( anchor ).offset().top,
				},
				500
			);
		}

		$btn.click( async () => {
			$btn.prop( 'disabled', true );
			printStatus( props.messages.waiting, true );

			const response = await fetch( props.endpoint, {
				method: 'POST',
				credentials: 'same-origin',
				headers: {
					'content-type': 'application/json',
				},
				body: JSON.stringify( {
					nonce: props.nonce,
				} ),
			} );

			const responseData = await response.json();

			if ( ! responseData.success ) {
				printStatus( responseData.data.message );
				$btn.prop( 'disabled', false );
			} else {
				window.location.href +=
					( window.location.href.indexOf( '?' ) > -1 ? '&' : '?' ) +
					'feature-refreshed=1#';
			}
		} );
	} )(
		jQuery,
		PayPalCommerceGatewaySettings.ajax.refresh_feature_status,
		'#field-credentials_feature_onboarding_heading'
	);
} );