const path = require( 'path' );
const fs = require( 'fs' );
const getAppRoot = require( './app-root' );

const appPath = getAppRoot();

/**
 * Resolve a local E2E file.
 *
 * @param {string} filename Filename to append to the path.
 * @return {string}
 */
const resolveLocalE2ePath = ( filename = '' ) => {
	const { WC_E2E_FOLDER } = process.env;
	const localPath = `${WC_E2E_FOLDER}/tests/e2e/${filename}`;
	const resolvedPath = path.resolve(
		appPath,
		localPath.indexOf( '/' ) == 0 ? localPath.slice( 1 ) : localPath
	);

	return resolvedPath;
}

// Copy local test configuration file if it exists.
const localTestConfigFile = resolveLocalE2ePath( 'config/default.json' );
const defaultConfigFile = path.resolve(
	__dirname,
	'../config/default/default.json'
);
const testConfigFile = path.resolve( __dirname, '../config/default.json' );

if ( fs.existsSync( localTestConfigFile ) ) {
	fs.copyFileSync( localTestConfigFile, testConfigFile );
} else {
	fs.copyFileSync( defaultConfigFile, testConfigFile );
}

/**
 * Get test container configuration.
 *
 * @return {any}
 */
const getTestConfig = () => {
	const rawTestConfig = fs.readFileSync( testConfigFile );
	const config = require( 'config' );
	const url = config.get( 'url' );
	const users = config.get( 'users' );

	// Support for environment variable overrides.
	const testConfig = JSON.parse( rawTestConfig );
	if ( url ) {
		testConfig.url = url;
	}
	if ( users ) {
		if ( users.admin ) {
			testConfig.users.admin = users.admin;
		}
		if ( users.customer ) {
			testConfig.users.customer = users.customer;
		}
	}

	const testPort = testConfig.url.match( /[0-9]+/ );
	testConfig.baseUrl = testConfig.url.substr( 0, testConfig.url.length - 1 );
	if ( Array.isArray( testPort ) ) {
		testConfig.port = testPort[ 0 ] ? testPort[ 0 ] : '8084';
	} else {
		testConfig.port = '';
	}
	return testConfig;
};

/**
 * Get user account settings for Docker configuration.
 */
const getAdminConfig = () => {
	const testConfig = getTestConfig();
	const adminConfig = {
		WORDPRESS_LOGIN: testConfig.users.admin.username
			? testConfig.users.admin.username
			: 'admin',
		WORDPRESS_PASSWORD: testConfig.users.admin.password
			? testConfig.users.admin.password
			: 'password',
		WORDPRESS_EMAIL: testConfig.users.admin.email
			? testConfig.users.admin.email
			: 'admin@woocommercecoree2etestsuite.com',
	};

	return adminConfig;
};

module.exports = {
	getTestConfig,
	getAdminConfig,
	resolveLocalE2ePath,
};