/**
 * External dependencies
 */
const path = require( 'path' );
const MergeExtractFilesPlugin = require( './merge-extract-files-webpack-plugin' );
const MiniCssExtractPlugin = require( 'mini-css-extract-plugin' );
const ProgressBarPlugin = require( 'progress-bar-webpack-plugin' );
const DependencyExtractionWebpackPlugin = require( '@wordpress/dependency-extraction-webpack-plugin' );
const WebpackRTLPlugin = require( 'webpack-rtl-plugin' );
const chalk = require( 'chalk' );
const { omit } = require( 'lodash' );

const NODE_ENV = process.env.NODE_ENV || 'development';

function findModuleMatch( module, match ) {
	if ( module.request && match.test( module.request ) ) {
		return true;
	} else if ( module.issuer ) {
		return findModuleMatch( module.issuer, match );
	}
	return false;
}

const requestToExternal = ( request ) => {
	const wcDepMap = {
		'@woocommerce/blocks-registry': [ 'wc', 'wcBlocksRegistry' ],
		'@woocommerce/settings': [ 'wc', 'wcSettings' ],
		'@woocommerce/block-data': [ 'wc', 'wcBlocksData' ],
	};
	if ( wcDepMap[ request ] ) {
		return wcDepMap[ request ];
	}
};

const requestToHandle = ( request ) => {
	const wcHandleMap = {
		'@woocommerce/blocks-registry': 'wc-blocks-registry',
		'@woocommerce/settings': 'wc-settings',
		'@woocommerce/block-settings': 'wc-settings',
		'@woocommerce/block-data': 'wc-blocks-data-store',
	};
	if ( wcHandleMap[ request ] ) {
		return wcHandleMap[ request ];
	}
};

const getAlias = ( options = {} ) => {
	let { pathPart } = options;
	pathPart = pathPart ? `${ pathPart }/` : '';
	return {
		'@woocommerce/blocks-registry': path.resolve(
			__dirname,
			'../assets/js/blocks-registry'
		),
		'@woocommerce/block-settings': path.resolve(
			__dirname,
			'../assets/js/settings/blocks'
		),
		'@woocommerce/base-components': path.resolve(
			__dirname,
			`../assets/js/${ pathPart }base/components/`
		),
		'@woocommerce/base-context': path.resolve(
			__dirname,
			`../assets/js/${ pathPart }base/context/`
		),
		'@woocommerce/base-hocs': path.resolve(
			__dirname,
			`../assets/js/${ pathPart }base/hocs/`
		),
		'@woocommerce/base-hooks': path.resolve(
			__dirname,
			`../assets/js/${ pathPart }base/hooks/`
		),
		'@woocommerce/block-components': path.resolve(
			__dirname,
			`../assets/js/${ pathPart }components/`
		),
		'@woocommerce/block-hocs': path.resolve(
			__dirname,
			`../assets/js/${ pathPart }hocs`
		),
		'@woocommerce/atomic-components': path.resolve(
			__dirname,
			`../assets/js/${ pathPart }atomic/components/`
		),
		'@woocommerce/resource-previews': path.resolve(
			__dirname,
			`../assets/js/${ pathPart }previews/`
		),
	};
};

const mainEntry = {
	// Shared blocks code
	blocks: './assets/js/index.js',
	// Blocks
	'handpicked-products': './assets/js/blocks/handpicked-products/index.js',
	'product-best-sellers': './assets/js/blocks/product-best-sellers/index.js',
	'product-category': './assets/js/blocks/product-category/index.js',
	'product-categories': './assets/js/blocks/product-categories/index.js',
	'product-new': './assets/js/blocks/product-new/index.js',
	'product-on-sale': './assets/js/blocks/product-on-sale/index.js',
	'product-top-rated': './assets/js/blocks/product-top-rated/index.js',
	'products-by-attribute':
		'./assets/js/blocks/products-by-attribute/index.js',
	'featured-product': './assets/js/blocks/featured-product/index.js',
	'all-reviews': './assets/js/blocks/reviews/all-reviews/index.js',
	'reviews-by-product':
		'./assets/js/blocks/reviews/reviews-by-product/index.js',
	'reviews-by-category':
		'./assets/js/blocks/reviews/reviews-by-category/index.js',
	'product-search': './assets/js/blocks/product-search/index.js',
	'product-tag': './assets/js/blocks/product-tag/index.js',
	'featured-category': './assets/js/blocks/featured-category/index.js',
	'all-products': './assets/js/blocks/products/all-products/index.js',
	'price-filter': './assets/js/blocks/price-filter/index.js',
};

const frontEndEntry = {
	reviews: './assets/js/blocks/reviews/frontend.js',
	'all-products': './assets/js/blocks/products/all-products/frontend.js',
	'price-filter': './assets/js/blocks/price-filter/frontend.js',
};

const getEntryConfig = ( main = true, exclude = [] ) => {
	const entryConfig = main ? mainEntry : frontEndEntry;
	return omit( entryConfig, exclude );
};

const getMainConfig = ( options = {} ) => {
	let { fileSuffix } = options;
	const { alias, resolvePlugins = [] } = options;
	fileSuffix = fileSuffix ? `-${ fileSuffix }` : '';
	const resolve = alias
		? {
				alias,
				plugins: resolvePlugins,
		  }
		: {
				plugins: resolvePlugins,
		  };
	return {
		entry: getEntryConfig( true, options.exclude || [] ),
		output: {
			path: path.resolve( __dirname, '../build/' ),
			filename: `[name]${ fileSuffix }.js`,
			library: [ 'wc', 'blocks', '[name]' ],
			libraryTarget: 'this',
			// This fixes an issue with multiple webpack projects using chunking
			// overwriting each other's chunk loader function.
			// See https://webpack.js.org/configuration/output/#outputjsonpfunction
			jsonpFunction: 'webpackWcBlocksJsonp',
		},
		optimization: {
			splitChunks: {
				cacheGroups: {
					commons: {
						test: /[\\/]node_modules[\\/]/,
						name: 'vendors',
						chunks: 'all',
						enforce: true,
					},
					editor: {
						// Capture all `editor` stylesheets and the components stylesheets.
						test: ( module = {} ) =>
							module.constructor.name === 'CssModule' &&
							( findModuleMatch( module, /editor\.scss$/ ) ||
								findModuleMatch(
									module,
									/[\\/]assets[\\/]components[\\/]/
								) ),
						name: 'editor',
						chunks: 'all',
						priority: 10,
					},
					style: {
						test: /style\.scss$/,
						name: 'style',
						chunks: 'all',
						priority: 5,
					},
				},
			},
		},
		module: {
			rules: [
				{
					test: /\.jsx?$/,
					exclude: /node_modules/,
					use: {
						loader: 'babel-loader?cacheDirectory',
						options: {
							presets: [ '@wordpress/babel-preset-default' ],
							plugins: [
								NODE_ENV === 'production'
									? require.resolve(
											'babel-plugin-transform-react-remove-prop-types'
									  )
									: false,
								require.resolve(
									'@babel/plugin-proposal-class-properties'
								),
							].filter( Boolean ),
						},
					},
				},
				{
					test: /\.s[c|a]ss$/,
					use: [
						'style-loader',
						MiniCssExtractPlugin.loader,
						{ loader: 'css-loader', options: { importLoaders: 1 } },
						'postcss-loader',
						{
							loader: 'sass-loader',
							query: {
								includePaths: [ 'assets/css/abstracts' ],
								data:
									'@import "_colors"; ' +
									'@import "_variables"; ' +
									'@import "_breakpoints"; ' +
									'@import "_mixins"; ',
							},
						},
					],
				},
			],
		},
		plugins: [
			new WebpackRTLPlugin( {
				filename: `[name]${ fileSuffix }-rtl.css`,
				minify: {
					safe: true,
				},
			} ),
			new MiniCssExtractPlugin( {
				filename: `[name]${ fileSuffix }.css`,
			} ),
			new MergeExtractFilesPlugin(
				[
					`build/editor${ fileSuffix }.js`,
					`build/style${ fileSuffix }.js`,
				],
				`build/vendors${ fileSuffix }.js`
			),
			new ProgressBarPlugin( {
				format:
					chalk.blue( 'Build' ) +
					' [:bar] ' +
					chalk.green( ':percent' ) +
					' :msg (:elapsed seconds)',
			} ),
			new DependencyExtractionWebpackPlugin( {
				injectPolyfill: true,
				requestToExternal,
				requestToHandle,
			} ),
		],
		resolve,
	};
};

const getFrontConfig = ( options = {} ) => {
	let { fileSuffix } = options;
	const { alias, resolvePlugins = [] } = options;
	fileSuffix = fileSuffix ? `-${ fileSuffix }` : '';
	const resolve = alias
		? {
				alias,
				plugins: resolvePlugins,
		  }
		: {
				plugins: resolvePlugins,
		  };
	return {
		entry: getEntryConfig( false, options.exclude || [] ),
		output: {
			path: path.resolve( __dirname, '../build/' ),
			filename: `[name]${ fileSuffix }-frontend.js`,
			// This fixes an issue with multiple webpack projects using chunking
			// overwriting each other's chunk loader function.
			// See https://webpack.js.org/configuration/output/#outputjsonpfunction
			jsonpFunction: 'webpackWcBlocksJsonp',
		},
		module: {
			rules: [
				{
					test: /\.jsx?$/,
					exclude: /node_modules/,
					use: {
						loader: 'babel-loader?cacheDirectory',
						options: {
							presets: [
								[
									'@babel/preset-env',
									{
										modules: false,
										targets: {
											browsers: [
												'extends @wordpress/browserslist-config',
											],
										},
									},
								],
							],
							plugins: [
								require.resolve(
									'@babel/plugin-proposal-object-rest-spread'
								),
								require.resolve(
									'@babel/plugin-transform-react-jsx'
								),
								require.resolve(
									'@babel/plugin-proposal-async-generator-functions'
								),
								require.resolve(
									'@babel/plugin-transform-runtime'
								),
								require.resolve(
									'@babel/plugin-proposal-class-properties'
								),
								NODE_ENV === 'production'
									? require.resolve(
											'babel-plugin-transform-react-remove-prop-types'
									  )
									: false,
							].filter( Boolean ),
						},
					},
				},
				{
					test: /\.s[c|a]ss$/,
					use: {
						loader: 'ignore-loader',
					},
				},
			],
		},
		plugins: [
			new ProgressBarPlugin( {
				format:
					chalk.blue( 'Build frontend scripts' ) +
					' [:bar] ' +
					chalk.green( ':percent' ) +
					' :msg (:elapsed seconds)',
			} ),
			new DependencyExtractionWebpackPlugin( {
				injectPolyfill: true,
				requestToExternal,
				requestToHandle,
			} ),
		],
		resolve,
	};
};

module.exports = {
	getAlias,
	getFrontConfig,
	getMainConfig,
};