/**
 * External dependencies
 */
import { __, _n, _x, sprintf } from '@wordpress/i18n';
import { Component, Fragment } from '@wordpress/element';
import { compose } from '@wordpress/compose';
import { Button, FormToggle } from '@wordpress/components';
import { withDispatch } from '@wordpress/data';
import { keys, get, pickBy } from 'lodash';

/**
 * WooCommerce dependencies
 */
import { formatValue } from 'lib/number-format';
import {
	getSetting,
	CURRENCY as currency,
} from '@woocommerce/wc-admin-settings';

/**
 * Internal dependencies
 */
import {
	H,
	Card,
	SelectControl,
	Form,
	TextControl,
} from '@woocommerce/components';
import withSelect from 'wc-api/with-select';
import { recordEvent } from 'lib/tracks';
import { formatCurrency } from 'lib/currency-format';
import Plugins from 'dashboard/task-list/tasks/steps/plugins';
import { pluginNames } from 'wc-api/onboarding/constants';
import { getCurrencyRegion } from 'dashboard/utils';

const wcAdminAssetUrl = getSetting( 'wcAdminAssetUrl', '' );

class BusinessDetails extends Component {
	constructor( props ) {
		super();
		const profileItems = get( props, 'profileItems', {} );
		const businessExtensions = get(
			profileItems,
			'business_extensions',
			false
		);

		this.initialValues = {
			other_platform: profileItems.other_platform || '',
			other_platform_name: profileItems.other_platform_name || '',
			product_count: profileItems.product_count || '',
			selling_venues: profileItems.selling_venues || '',
			revenue: profileItems.revenue || '',
			'facebook-for-woocommerce': businessExtensions
				? businessExtensions.includes( 'facebook-for-woocommerce' )
				: true,
			'mailchimp-for-woocommerce': businessExtensions
				? businessExtensions.includes( 'mailchimp-for-woocommerce' )
				: true,
		};

		this.state = {
			installExtensions: false,
			isInstallingExtensions: false,
			extensionInstallError: false,
		};

		this.extensions = [
			'facebook-for-woocommerce',
			'mailchimp-for-woocommerce',
		];

		this.onContinue = this.onContinue.bind( this );
		this.validate = this.validate.bind( this );
	}

	async onContinue( values ) {
		const {
			createNotice,
			goToNextStep,
			isError,
			updateProfileItems,
		} = this.props;
		const {
			other_platform: otherPlatform,
			other_platform_name: otherPlatformName,
			product_count: productCount,
			revenue,
			selling_venues: sellingVenues,
		} = values;
		const businessExtensions = this.getBusinessExtensions( values );

		recordEvent( 'storeprofiler_store_business_details_continue', {
			product_number: productCount,
			already_selling: sellingVenues,
			currency: currency.code,
			revenue,
			used_platform: otherPlatform,
			used_platform_name: otherPlatformName,
			install_facebook: values[ 'facebook-for-woocommerce' ],
			install_mailchimp: values[ 'mailchimp-for-woocommerce' ],
		} );

		const _updates = {
			other_platform: otherPlatform,
			other_platform_name:
				otherPlatform === 'other' ? otherPlatformName : '',
			product_count: productCount,
			revenue,
			selling_venues: sellingVenues,
			business_extensions: businessExtensions,
		};

		// Remove possible empty values like `revenue` and `other_platform`.
		const updates = {};
		Object.keys( _updates ).forEach( ( key ) => {
			if ( _updates[ key ] !== '' ) {
				updates[ key ] = _updates[ key ];
			}
		} );

		await updateProfileItems( updates );

		if ( ! isError ) {
			if ( businessExtensions.length === 0 ) {
				goToNextStep();
				return;
			}

			this.setState( {
				installExtensions: true,
				isInstallingExtensions: true,
			} );
		} else {
			createNotice(
				'error',
				__(
					'There was a problem updating your business details.',
					'woocommerce-admin'
				)
			);
		}
	}

	validate( values ) {
		const errors = {};

		Object.keys( values ).forEach( ( name ) => {
			if ( name === 'other_platform' ) {
				if (
					! values.other_platform.length &&
					[ 'other', 'brick-mortar-other' ].includes(
						values.selling_venues
					)
				) {
					errors.other_platform = __(
						'This field is required',
						'woocommerce-admin'
					);
				}
			} else if ( name === 'other_platform_name' ) {
				if (
					! values.other_platform_name &&
					values.other_platform === 'other'
				) {
					errors.other_platform_name = __(
						'This field is required',
						'woocommerce-admin'
					);
				}
			} else if ( name === 'revenue' ) {
				if (
					! values.revenue.length &&
					[
						'other',
						'brick-mortar',
						'brick-mortar-other',
						'other-woocommerce',
					].includes( values.selling_venues )
				) {
					errors.revenue = __(
						'This field is required',
						'woocommerce-admin'
					);
				}
			} else if (
				! this.extensions.includes( name ) &&
				! values[ name ].length
			) {
				errors[ name ] = __(
					'This field is required',
					'woocommerce-admin'
				);
			}
		} );

		return errors;
	}

	getBusinessExtensions( values ) {
		return keys( pickBy( values ) ).filter( ( name ) =>
			this.extensions.includes( name )
		);
	}

	convertCurrency( value ) {
		const region = getCurrencyRegion(
			this.props.settings.woocommerce_default_country
		);
		if ( region === 'US' ) {
			return value;
		}

		// These are rough exchange rates from USD.  Precision is not paramount.
		// The keys here should match the keys in `getCurrencyData`.
		const exchangeRates = {
			US: 1,
			EU: 0.9,
			IN: 71.24,
			GB: 0.76,
			BR: 4.19,
			VN: 23172.5,
			ID: 14031.0,
			BD: 84.87,
			PK: 154.8,
			RU: 63.74,
			TR: 5.75,
			MX: 19.37,
			CA: 1.32,
		};

		const exchangeRate = exchangeRates[ region ] || exchangeRates.US;
		const digits = exchangeRate.toString().split( '.' )[ 0 ].length;
		const multiplier = Math.pow( 10, 2 + digits );

		return Math.round( ( value * exchangeRate ) / multiplier ) * multiplier;
	}

	numberFormat( value ) {
		return formatValue( 'number', value );
	}

	getNumberRangeString( min, max = false, format = this.numberFormat ) {
		if ( ! max ) {
			return sprintf(
				_x(
					'%s+',
					'store product count or revenue',
					'woocommerce-admin'
				),
				format( min )
			);
		}

		return sprintf(
			_x(
				'%1$s - %2$s',
				'store product count or revenue range',
				'woocommerce-admin'
			),
			format( min ),
			format( max )
		);
	}

	renderBusinessExtensionHelpText( values ) {
		const { isInstallingExtensions } = this.state;
		const extensions = this.getBusinessExtensions( values );

		if ( extensions.length === 0 ) {
			return null;
		}

		const extensionsList = extensions
			.map( ( extension ) => {
				return pluginNames[ extension ];
			} )
			.join( ', ' );

		if ( isInstallingExtensions ) {
			return (
				<p>
					{ sprintf(
						_n(
							'Installing the following plugin: %s',
							'Installing the following plugins: %s',
							extensions.length,
							'woocommerce-admin'
						),
						extensionsList
					) }
				</p>
			);
		}

		return (
			<p>
				{ sprintf(
					_n(
						'The following plugin will be installed for free: %s',
						'The following plugins will be installed for free: %s',
						extensions.length,
						'woocommerce-admin'
					),
					extensionsList
				) }
			</p>
		);
	}

	renderBusinessExtensions( values, getInputProps ) {
		const { installExtensions } = this.state;
		const { goToNextStep } = this.props;
		const extensionsToInstall = this.getBusinessExtensions( values );
		const extensionBenefits = [
			{
				slug: 'facebook-for-woocommerce',
				title: __( 'Market on Facebook', 'woocommerce-admin' ),
				icon: 'onboarding/facebook.png',
				description: __(
					'Grow your business by targeting the right people and driving sales with Facebook.',
					'woocommerce-admin'
				),
			},
			{
				slug: 'mailchimp-for-woocommerce',
				title: __(
					'Contact customers with Mailchimp',
					'woocommerce-admin'
				),
				icon: 'onboarding/mailchimp.png',
				description: __(
					'Send targeted campaigns, recover abandoned carts and much more with Mailchimp.',
					'woocommerce-admin'
				),
			},
		];

		return (
			<Fragment>
				<div className="woocommerce-profile-wizard__benefits">
					{ extensionBenefits.map( ( benefit ) => (
						<div
							className="woocommerce-profile-wizard__benefit"
							key={ benefit.title }
						>
							<div className="woocommerce-profile-wizard__business-extension">
								<img
									src={ wcAdminAssetUrl + benefit.icon }
									alt=""
								/>
							</div>
							<div className="woocommerce-profile-wizard__benefit-content">
								<H className="woocommerce-profile-wizard__benefit-title">
									{ benefit.title }
								</H>
								<p>{ benefit.description }</p>
							</div>
							<div className="woocommerce-profile-wizard__benefit-toggle">
								<FormToggle
									checked={ values[ benefit.slug ] }
									{ ...getInputProps( benefit.slug ) }
								/>
							</div>
						</div>
					) ) }
				</div>

				{ installExtensions && (
					<div className="woocommerce-profile-wizard__card-actions">
						<Plugins
							onComplete={ () => {
								goToNextStep();
							} }
							onSkip={ () => {
								goToNextStep();
							} }
							onError={ () => {
								this.setState( {
									extensionInstallError: true,
									isInstallingExtensions: false,
								} );
							} }
							autoInstall
							pluginSlugs={ extensionsToInstall }
						/>
					</div>
				) }
			</Fragment>
		);
	}

	render() {
		const { isInstallingExtensions, extensionInstallError } = this.state;
		const productCountOptions = [
			{
				key: '0',
				label: __(
					"I don't have any products yet.",
					'woocommerce-admin'
				),
			},
			{
				key: '1-10',
				label: this.getNumberRangeString( 1, 10 ),
			},
			{
				key: '11-100',
				label: this.getNumberRangeString( 11, 100 ),
			},
			{
				key: '101-1000',
				label: this.getNumberRangeString( 101, 1000 ),
			},
			{
				key: '1000+',
				label: this.getNumberRangeString( 1000 ),
			},
		];

		const revenueOptions = [
			{
				key: 'none',
				label: sprintf(
					/* translators: %s: $0 revenue amount */
					__( "%s (I'm just getting started)", 'woocommerce-admin' ),
					formatCurrency( 0 )
				),
			},
			{
				key: 'up-to-2500',
				label: sprintf(
					/* translators: %s: A given revenue amount, e.g., $2500 */
					__( 'Up to %s', 'woocommerce-admin' ),
					formatCurrency( this.convertCurrency( 2500 ) )
				),
			},
			{
				key: '2500-10000',
				label: this.getNumberRangeString(
					this.convertCurrency( 2500 ),
					this.convertCurrency( 10000 ),
					formatCurrency
				),
			},
			{
				key: '10000-50000',
				label: this.getNumberRangeString(
					this.convertCurrency( 10000 ),
					this.convertCurrency( 50000 ),
					formatCurrency
				),
			},
			{
				key: '50000-250000',
				label: this.getNumberRangeString(
					this.convertCurrency( 50000 ),
					this.convertCurrency( 250000 ),
					formatCurrency
				),
			},
			{
				key: 'more-than-250000',
				label: sprintf(
					/* translators: %s: A given revenue amount, e.g., $250000 */
					__( 'More than %s', 'woocommerce-admin' ),
					formatCurrency( this.convertCurrency( 250000 ) )
				),
			},
		];

		const sellingVenueOptions = [
			{
				key: 'no',
				label: __( 'No', 'woocommerce-admin' ),
			},
			{
				key: 'other',
				label: __( 'Yes, on another platform', 'woocommerce-admin' ),
			},
			{
				key: 'other-woocommerce',
				label: __(
					'Yes, I own a different store powered by WooCommerce',
					'woocommerce-admin'
				),
			},
			{
				key: 'brick-mortar',
				label: __(
					'Yes, in person at physical stores and/or events',
					'woocommerce-admin'
				),
			},
			{
				key: 'brick-mortar-other',
				label: __(
					'Yes, on another platform and in person at physical stores and/or events',
					'woocommerce-admin'
				),
			},
		];

		const otherPlatformOptions = [
			{
				key: 'shopify',
				label: __( 'Shopify', 'woocommerce-admin' ),
			},
			{
				key: 'bigcommerce',
				label: __( 'BigCommerce', 'woocommerce-admin' ),
			},
			{
				key: 'magento',
				label: __( 'Magento', 'woocommerce-admin' ),
			},
			{
				key: 'wix',
				label: __( 'Wix', 'woocommerce-admin' ),
			},
			{
				key: 'amazon',
				label: __( 'Amazon', 'woocommerce-admin' ),
			},
			{
				key: 'ebay',
				label: __( 'eBay', 'woocommerce-admin' ),
			},
			{
				key: 'etsy',
				label: __( 'Etsy', 'woocommerce-admin' ),
			},
			{
				key: 'squarespace',
				label: __( 'Squarespace', 'woocommerce-admin' ),
			},
			{
				key: 'other',
				label: __( 'Other', 'woocommerce-admin' ),
			},
		];

		return (
			<Form
				initialValues={ this.initialValues }
				onSubmitCallback={ this.onContinue }
				validate={ this.validate }
			>
				{ ( { getInputProps, handleSubmit, values, isValidForm } ) => {
					// Show extensions when the currently selling elsewhere checkbox has been answered.
					const showExtensions = values.selling_venues !== '';
					return (
						<Fragment>
							<H className="woocommerce-profile-wizard__header-title">
								{ __(
									'Tell us about your business',
									'woocommerce-admin'
								) }
							</H>
							<p>
								{ __(
									"We'd love to know if you are just getting started or you already have a business in place.",
									'woocommerce-admin'
								) }
							</p>
							<Card>
								<Fragment>
									<SelectControl
										label={ __(
											'How many products do you plan to display?',
											'woocommerce-admin'
										) }
										options={ productCountOptions }
										required
										{ ...getInputProps( 'product_count' ) }
									/>

									<SelectControl
										label={ __(
											'Currently selling elsewhere?',
											'woocommerce-admin'
										) }
										options={ sellingVenueOptions }
										required
										{ ...getInputProps( 'selling_venues' ) }
									/>

									{ [
										'other',
										'brick-mortar',
										'brick-mortar-other',
										'other-woocommerce',
									].includes( values.selling_venues ) && (
										<SelectControl
											label={ __(
												"What's your current annual revenue?",
												'woocommerce-admin'
											) }
											options={ revenueOptions }
											required
											{ ...getInputProps( 'revenue' ) }
										/>
									) }

									{ [
										'other',
										'brick-mortar-other',
									].includes( values.selling_venues ) && (
										<Fragment>
											<SelectControl
												label={ __(
													'Which platform is the store using?',
													'woocommerce-admin'
												) }
												options={ otherPlatformOptions }
												required
												{ ...getInputProps(
													'other_platform'
												) }
											/>
											{ values.other_platform ===
												'other' && (
												<TextControl
													label={ __(
														'What is the platform name?',
														'woocommerce-admin'
													) }
													required
													{ ...getInputProps(
														'other_platform_name'
													) }
												/>
											) }
										</Fragment>
									) }

									{ showExtensions &&
										this.renderBusinessExtensions(
											values,
											getInputProps
										) }

									{ ! extensionInstallError && (
										<Button
											isPrimary
											className="woocommerce-profile-wizard__continue"
											onClick={ handleSubmit }
											disabled={ ! isValidForm }
											isBusy={ isInstallingExtensions }
										>
											{ __(
												'Continue',
												'woocommerce-admin'
											) }
										</Button>
									) }
								</Fragment>
							</Card>

							{ showExtensions &&
								this.renderBusinessExtensionHelpText( values ) }
						</Fragment>
					);
				} }
			</Form>
		);
	}
}

export default compose(
	withSelect( ( select ) => {
		const { getProfileItems, getProfileItemsError, getSettings } = select(
			'wc-api'
		);

		const settings = getSettings( 'general' );

		return {
			isError: Boolean( getProfileItemsError() ),
			profileItems: getProfileItems(),
			settings,
		};
	} ),
	withDispatch( ( dispatch ) => {
		const { updateProfileItems } = dispatch( 'wc-api' );
		const { createNotice } = dispatch( 'core/notices' );

		return {
			createNotice,
			updateProfileItems,
		};
	} )
)( BusinessDetails );