var jscodeshift = require('jscodeshift');


function createArrowFunction(value) {
	return '() => ' +  '\'' + value + '\'';
}
function createRegularFunction(value) {
	return 'function () {\n return ' + '\'' + value + '\'' + '\n}';
}
function createDynamicPromise(arr) {
	if(Array.isArray(arr)) {
		return '() => new Promise((resolve) => resolve([' + arr.map( (n) => {
			return '\'' + n + '\'';
		}) + ']))';
	} else {
		return '() => new Promise((resolve) => resolve(' + '\'' + arr + '\'' + '))';
	}
}
function createAssetFilterFunction(value) {
	return 'function (assetFilename) {\n return assetFilename.endsWith(' +  '\'' + '.' + value + '\'' + ');\n}';
}
function createExternalFunction(regexp) {
	return '\n function (context, request, callback) {\n if ('
	+ '/' + regexp + '/.test(request)){' + '\n' + '   return callback(null, \'commonjs\' + request);\n}\n'
	+ 'callback();\n}';
}
function parseValue(regexp) {
	return jscodeshift(regexp);
}

function createCommonsChunkPlugin(value) {
	return 'new webpack.optimize.CommonsChunkPlugin({name:' + '\'' + value + '\'' + ',filename:' + '\'' + value + '\-[hash].min.js\'})';
}
function createRequire(val) {
	return 'const ' + val + ' = ' + 'require(' + '\'' + val + '\'' + ');';
}
function List(name, message, choices) {
	return ({
		type: 'list',
		name: name,
		message: message,
		choices: choices
	});
}
function RawList(name, message, choices) {
	return ({
		type: 'rawlist',
		name: name,
		message: message,
		choices: choices
	});
}

function CheckList(name, message, choices) {
	return ({
		type: 'checkbox',
		name: name,
		message: message,
		choices: choices
	});
}

function Input(name, message) {
	return ({
		type: 'input',
		name: name,
		message: message
	});
}

function InputValidate(name, message, cb) {
	return ({
		type: 'input',
		name: name,
		message: message,
		validate: cb
	});
}

function Confirm(name, message) {
	return ({
		type: 'confirm',
		name: name,
		message: message,
	});
}

module.exports = {
	createArrowFunction,
	createDynamicPromise,
	createRegularFunction,
	createAssetFilterFunction,
	createExternalFunction,
	parseValue,
	createCommonsChunkPlugin,
	createRequire,
	List,
	RawList,
	CheckList,
	Input,
	InputValidate,
	Confirm
};