#!/usr/bin/env node

/**
 * External dependencies.
 */
const fs = require( 'fs' );
const sprintf = require( 'sprintf-js' ).sprintf;

/**
 * Internal dependencies.
 */
const { resolveLocalE2ePath } = require( '../utils' );

const [ command, package ] = process.argv.slice( 2 );

/**
 * Install the test scripts and sample default.json configuration
 */
if ( command == 'install' ) {
	/**
	const { getTestInstallSpecs, getSampleDefaultJson } = require( package );

	if ( getTestInstallSpecs instanceof Function ) {
		console.log( 'is a function' );
	}
	if ( getSampleDefaultJson instanceof Function ) {
		const sampleDefaultJson = getSampleDefaultJson();
		console.log( sampleDefaultJson );
	}
	/**/
	// @todo Add logic for dynamic file extension
	const testExtension = 'test.js';
	const sampleDefaultJson = {
		"url": "http://localhost:8084/",
		"users": {
			"admin": {
				"username": "admin",
				"password": "password"
			},
			"customer": {
				"username": "customer",
				"password": "password"
			}
		},
	};
	const testSpecs = {
		"active": [
			{
				"name": "example",
				"description": "Shopper tests",
				"testFiles": [
					{
						"name": "cart-begin",
						"functions": [ "runCartPageTest" ]
					}, {
						"name": "cart-end",
						"functions": [
							"testCartEnd",
							"testCartEndPart2",
							"testCartEndPart3",
							"testCartEndPart4"
						]
					}
				]
			}
		]
	};

	// Write sample default.json
	const packageSlug = package.replace( '@', '' ).replace( /\//g, '.' );
	const defaultJsonName = `config/default-${packageSlug}.json`;
	const defaultJsonSample = resolveLocalE2ePath( defaultJsonName );
	fs.writeFileSync( defaultJsonSample, JSON.stringify( sampleDefaultJson , null, 2 ) );
	console.log( `\nWrote sample test configuration to 'tests/e2e/${defaultJsonName}'.\n` );

	// Write test files
	if ( testSpecs.active && testSpecs.active.length ) {
		const eol = "\n";
		const autoGenerate = sprintf( '/* This file was auto-generated by the command `npx wc-e2e install %s. */', package );
		const importLineFormat = sprintf( "import {%%s} from '%s';", package );
		// Loop through folders and files to write test scripts.
		for ( let f = 0; f < testSpecs.active.length; f++ ) {
			const testFolder = testSpecs.active[ f ];
			if ( ! testFolder.testFiles || ! testFolder.testFiles.length ) {
				continue;
			}

			const specFolder = testFolder.name.length ? `specs/${testFolder.name}` : 'specs';
			const specFolderPath = resolveLocalE2ePath( specFolder );

			// Create the test folder if it doesn't exist.
			if ( ! fs.existsSync( specFolderPath) ) {
				fs.mkdirSync( specFolderPath );
			}

			// Create the test files.
			for ( let t = 0; t < testFolder.testFiles.length; t++ ) {
				const testFile = testFolder.testFiles[ t ];
				if ( ! testFile.functions.length ) {
					continue;
				}

				const testFileName = `${specFolder}/${testFile.name}.${testExtension}`;
				const testFilePath = resolveLocalE2ePath( testFileName );

				// @todo Add check to see if file exists
				// fs.existsSync
				// @todo Confirm overwrite
				// readline

				console.log( 'Writing tests/e2e/' + testFileName );
				let buffer = [ autoGenerate ];
				let testSeparator, testTerminator, importPrefix;

				// Add the import line.
				if ( testFile.functions.length > 3 ) {
					testSeparator = ',' + eol;
					testTerminator = eol;
					importPrefix = eol;
				} else {
					testSeparator = ', ';
					testTerminator = '';
					importPrefix = ' ';
				}
				const testImport = testFile.functions.join( testSeparator ) + testTerminator;
				// '' adds a blank line
				buffer.push( sprintf( importLineFormat, importPrefix + testImport ), '' );

				// Add test function calls and write the file
				let functionCalls = testFile.functions.map( functionName => functionName + '();' );
				buffer.push( ...functionCalls );
				fs.writeFileSync( testFilePath, buffer.join( eol ) );
			}
			console.log( eol );
		}
	}
}