/**
 * External dependencies
 */
import { decodeEntities } from '@wordpress/html-entities';
import { without } from 'lodash';
import { getSetting } from '@woocommerce/wc-admin-settings';

/**
 * Gets the country code from a country:state value string.
 *
 * @param {string} countryState Country state string, e.g. US:GA.
 * @return {string} Country string.
 */

export function getCountryCode( countryState ) {
	if ( ! countryState ) {
		return null;
	}

	return countryState.split( ':' )[ 0 ];
}

export function getCurrencyRegion( countryState ) {
	let region = getCountryCode( countryState );
	const euCountries = without(
		getSetting( 'onboarding', { euCountries: [] } ).euCountries,
		'GB'
	);
	if ( euCountries.includes( region ) ) {
		region = 'EU';
	}

	return region;
}

/**
 * Gets the product IDs for items based on the product types and theme selected in the onboarding profiler.
 *
 * @param {Object} profileItems Onboarding profile.
 * @param {boolean} includeInstalledItems Include installed items in returned product IDs.
 * @param {Array} installedPlugins Installed plugins.
 * @return {Array} Product Ids.
 */
export function getProductIdsForCart(
	profileItems,
	includeInstalledItems = false,
	installedPlugins
) {
	const productList = getProductList(
		profileItems,
		includeInstalledItems,
		installedPlugins
	);
	const productIds = productList.map(
		( product ) => product.id || product.product
	);
	return productIds;
}

/**
 * Gets the labeled/categorized product names and types for items based on the product types and theme selected in the onboarding profiler.
 *
 * @param {Object} profileItems Onboarding profile.
 * @param {Array} installedPlugins Installed plugins.
 * @return {Array} Objects with labeled/categorized product names and types.
 */
export function getCategorizedOnboardingProducts(
	profileItems,
	installedPlugins
) {
	const productList = {};
	productList.products = getProductList(
		profileItems,
		true,
		installedPlugins
	);
	productList.remainingProducts = getProductList(
		profileItems,
		false,
		installedPlugins
	);

	const uniqueItemsList = [
		...new Set( [
			...productList.products,
			...productList.remainingProducts,
		] ),
	];

	productList.uniqueItemsList = uniqueItemsList.map( ( product ) => {
		let cleanedProduct;
		if ( product.label ) {
			cleanedProduct = { type: 'extension', name: product.label };
		} else {
			cleanedProduct = { type: 'theme', name: product.title };
		}
		return cleanedProduct;
	} );

	return productList;
}

/**
 * Gets a product list for items based on the product types and theme selected in the onboarding profiler.
 *
 * @param {Object} profileItems Onboarding profile.
 * @param {boolean} includeInstalledItems Include installed items in returned product list.
 * @param {Array} installedPlugins Installed plugins.
 * @return {Array} Products.
 */
export function getProductList(
	profileItems,
	includeInstalledItems = false,
	installedPlugins
) {
	const onboarding = getSetting( 'onboarding', {} );
	const productList = [];

	// The population of onboarding.productTypes only happens if the task list should be shown
	// so bail early if it isn't present.
	if ( ! onboarding.productTypes ) {
		return productList;
	}

	const productTypes = profileItems.product_types || [];

	productTypes.forEach( ( productType ) => {
		if (
			onboarding.productTypes[ productType ] &&
			onboarding.productTypes[ productType ].product &&
			( includeInstalledItems ||
				! installedPlugins.includes(
					onboarding.productTypes[ productType ].slug
				) )
		) {
			productList.push( onboarding.productTypes[ productType ] );
		}
	} );

	const theme = onboarding.themes.find(
		( themeData ) => themeData.slug === profileItems.theme
	);

	if (
		theme &&
		theme.id &&
		getPriceValue( theme.price ) > 0 &&
		( includeInstalledItems || ! theme.is_installed )
	) {
		productList.push( theme );
	}

	return productList;
}

/**
 * Get the value of a price from a string, removing any non-numeric characters.
 *
 * @param {string} string Price string.
 * @return {number} Number value.
 */
export function getPriceValue( string ) {
	return Number( decodeEntities( string ).replace( /[^0-9.-]+/g, '' ) );
}

/**
 * Determines if a URL is a WC admin url.
 *
 * @param {*} url - the url to test
 * @return {boolean} true if the url is a wc-admin URL
 */
export function isWCAdmin( url ) {
	return /admin.php\?page=wc-admin/.test( url );
}