'use strict';

const debug = require('debug');

const chalk = require('chalk');

const _ = require('lodash');

const PassthroughEmitter = require('./passthrough-emitter');

const Promise = require('bluebird');

const pluginsLoader = require('plugins-loader');

const gracefulFs = require('graceful-fs');

const Config = require('./config');

const GeminiError = require('./errors/gemini-error');

const readTests = require('./test-reader');

const Runner = require('./runner');

const Events = require('./constants/events');

const StateProcessor = require('./state-processor');

const SuiteCollection = require('./suite-collection');

const {temp} = require('gemini-core');

const PREFIX = require('../package').name + '-';

Promise.promisifyAll(require('fs-extra'));

// patch fs module prototype for preventing EMFILE error (too many open files)

gracefulFs.gracefulify(require('fs'));

const parseBrowsers = (browsers) => {

return browsers && browsers.replace(/\s/g, '').split(',');

};

module.exports = class Gemini extends PassthroughEmitter {

static create(config, allowOverrides) {

return new Gemini(config, allowOverrides);

}

static readRawConfig(filePath) {

return Config.readRawConfig(filePath);

}

constructor(config, allowOverrides) {

super();

this.config = new Config(config, allowOverrides);

this.events = Events;

this.SuiteCollection = SuiteCollection;

setupLog(this.config.system.debug);

this._loadPlugins();

}

extendCli(parser) {

this.emit(Events.CLI, parser);

}

getScreenshotPath(suite, stateName, browserId) {

return this.config.forBrowser(browserId).getScreenshotPath(suite, stateName);

}

getBrowserCapabilites(browserId) {

return this.config.forBrowser(browserId).desiredCapabilities;

}

getValidBrowsers(browsers) {

return _.intersection(browsers, this.browserIds);

}

checkUnknownBrowsers(browsers) {

const browsersFromConfig = this.browserIds;

const unknownBrowsers = _.difference(browsers, browsersFromConfig);

if (unknownBrowsers.length) {

console.warn(

`${chalk.yellow('WARNING:')} Unknown browsers id: ${unknownBrowsers.join(', ')}.\n` +

`Use one of the browser ids specified in config file: ${browsersFromConfig.join(', ')}`

);

}

}

get browserIds() {

return this.config.getBrowserIds();

}

update(paths, options) {

return this._exec(() => this._run(StateProcessor.createScreenUpdater(options), paths, options));

}

test(paths, options) {

return this._exec(() => this._run(StateProcessor.createTester(this.config), paths, options));

}

readTests(paths, options = {}) {

return this._exec(() => this._readTests(paths, options));

}

_exec(fn) {

return this._init().then(() => fn());

}

_init() {

this._init = () => Promise.resolve(); // init only once

return this.emitAndWait(Events.INIT);

}

_loadPlugins() {

pluginsLoader.load(this, this.config.system.plugins, PREFIX);

}

_readTests(paths, options) {

options = _.assignIn(options, {paths});

return readTests(this, this.config, options)

.then((rootSuite) => {

if (options.grep) {

applyGrep_(options.grep, rootSuite);

}

const suiteCollection = new SuiteCollection(rootSuite.children);

this.emit(Events.AFTER_TESTS_READ, {suiteCollection});

return suiteCollection;

});

function applyGrep_(grep, suite) {

if (!suite.hasStates) {

_.clone(suite.children).forEach((child) => {

applyGrep_(grep, child, suite);

});

} else {

if (!grep.test(suite.fullName)) {

suite.parent.removeChild(suite);

}

}

if (!suite.hasStates && !suite.children.length && suite.parent) {

suite.parent.removeChild(suite);

}

}

}

_run(stateProcessor, paths, options) {

if (!options) {

//if there are only two arguments, they are

//(stateProcessor, options) and paths are

//the default.

options = paths;

paths = undefined;

}

options = options || {};

options.reporters = options.reporters || [];

temp.init(this.config.system.tempDir);

const runner = Runner.create(this.config, stateProcessor);

const envBrowsers = parseBrowsers(process.env.GEMINI_BROWSERS);

const envSkipBrowsers = parseBrowsers(process.env.GEMINI_SKIP_BROWSERS);

options.browsers = options.browsers || envBrowsers;

this._passThroughEvents(runner);

// it is important to require signal handler here in order to guarantee subscribing to "INTERRUPT" event

require('./signal-handler').on(Events.INTERRUPT, (data) => {

this.emit(Events.INTERRUPT, data);

runner.cancel();

});

if (options.browsers) {

this.checkUnknownBrowsers(options.browsers);

}

const getTests = (source, options) => {

return source instanceof SuiteCollection

? Promise.resolve(source)

: this._readTests(source, options);

};

return getTests(paths, options)

.then((suiteCollection) => {

this.checkUnknownBrowsers(envSkipBrowsers);

const validSkippedBrowsers = this.getValidBrowsers(envSkipBrowsers);

suiteCollection.skipBrowsers(validSkippedBrowsers);

options.reporters.forEach((reporter) => applyReporter(runner, reporter));

let testsStatistic;

runner.on(Events.END, (stats) => testsStatistic = stats);

return runner.run(suiteCollection)

.then(() => testsStatistic);

});

}

_passThroughEvents(runner) {

this.passthroughEvent(runner, _.values(Events));

}

};

function applyReporter(runner, reporter) {

if (typeof reporter === 'string') {

reporter = {name: reporter};

}

if (typeof reporter === 'object') {

const reporterPath = reporter.path;

try {

reporter = require('./reporters/' + reporter.name);

} catch (e) {

if (e.code === 'MODULE_NOT_FOUND') {

throw new GeminiError('No such reporter: ' + reporter.name);

}

throw e;

}

return reporter(runner, reporterPath);

}

if (typeof reporter !== 'function') {

throw new TypeError('Reporter must be a string, an object or a function');

}

reporter(runner);

}

function setupLog(isDebug) {

if (isDebug) {

Promise.config({

longStackTraces: true

});

debug.enable('gemini:*');

}

}