'use strict';

const path = require('path');

const Promise = require('bluebird');

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

const temp = require('temp');

const _ = require('lodash');

const chalk = require('chalk');

const findGemini = require('./find-gemini');

const reporter = require('./reporter');

const Tests = require('./tests-model');

const Index = require('./common/tests-index');

const EventSource = require('./event-source');

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

const filterBrowsers = _.intersection;

const checkUnknownBrowsers = (browsersFromConfig, browsersFromCli) => {

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

if (!_.isEmpty(unknownBrowsers)) {

console.warn('%s Unknown browser ids: %s. Use one of the browser ids specified in the config file: %s',

chalk.yellow('WARNING:'), unknownBrowsers.join(', '), browsersFromConfig.join(', '));

}

};

module.exports = class App {

constructor(options) {

this._options = options;

this.diffDir = temp.path('gemini-gui-diff');

this.currentDir = temp.path('gemini-gui-curr');

this._failedTests = new Index();

this._eventSource = new EventSource();

const Gemini = findGemini();

this._gemini = new Gemini(this._options.config, {cli: true, env: true});

_.set(this._gemini.config, 'system.tempDir', this.currentDir);

this._gemini.on('startRunner', (runner) => this._runner = runner);

const browserIds = this._gemini.browserIds;

checkUnknownBrowsers(browserIds, this._options.browser);

this.referenceDirs = _.zipObject(

browserIds,

browserIds.map((id) => this._gemini.config.forBrowser(id).screenshotsDir)

);

}

initialize() {

return this._recreateTmpDirs()

.then(this._readTests.bind(this));

}

addClient(connection) {

this._eventSource.addConnection(connection);

}

sendClientEvent(event, data) {

this._eventSource.emit(event, data);

}

getTests() {

return Promise.resolve(this._tests.data);

}

_readTests() {

return Promise.resolve(

this._gemini.readTests(this._options.testFiles, {grep: this._options.grep})

)

.then((collection) => {

this._collection = collection;

return collection.topLevelSuites();

})

.then((suites) => {

if (!this._options.browser) {

return;

}

suites.map((suite) => {

suite.browsers = filterBrowsers(suite.browsers, this._options.browser);

});

})

.then(() => {

this._tests = new Tests(this, this._collection);

});

}

run(specificTests) {

return Runner.create(this._collection, specificTests)

.run((collection) => this._gemini.test(collection, {

reporters: [reporter(this), 'flat']

}));

}

_recreateTmpDirs() {

return Promise.all([fs.removeAsync(this.currentDir), fs.removeAsync(this.diffDir)])

.then(() => Promise.all([

fs.mkdirpAsync(this.currentDir),

fs.mkdirpAsync(this.diffDir)

]));

}

buildDiff(failureReport) {

return this._buildDiffFile(failureReport)

.then((diffPath) => this.diffPathToURL(diffPath));

}

_buildDiffFile(failureReport) {

const diffPath = temp.path({dir: this.diffDir, suffix: '.png'});

return Promise.resolve(failureReport.saveDiffTo(diffPath))

.thenReturn(diffPath);

}

addNoReferenceTest(test) {

//adding ref path here because gemini requires real suite to calc ref path

//and on client we have just stringified path

test.referencePath = this.getScreenshotPath(test.suite, test.state.name, test.browserId);

this.addFailedTest(test);

}

addFailedTest(test) {

this._failedTests.add(test);

}

updateReferenceImage(testData) {

const test = this._failedTests.find(testData);

if (!test) {

return Promise.reject(new Error('No such test failed'));

}

const result = {

imagePath: test.referencePath,

updated: true,

suite: test.state.suite,

state: test.state,

browserId: test.browserId

};

return fs.mkdirpAsync(path.dirname(test.referencePath))

.then(() => fs.copyAsync(test.currentPath, test.referencePath))

.then(() => {

this._runner.emit('updateResult', result);

return this.refPathToURL(test.referencePath, test.browserId);

});

}

getScreenshotPath(suite, stateName, browserId) {

return this._gemini.getScreenshotPath(suite, stateName, browserId);

}

getBrowserCapabilites(browserId) {

return this._gemini.getBrowserCapabilites(browserId);

}

refPathToURL(fullPath, browserId) {

return this._appendTimestampToURL(

this._pathToURL(this.referenceDirs[browserId], fullPath, App.refPrefix + '/' + browserId)

);

}

currentPathToURL(fullPath) {

return this._appendTimestampToURL(

this._pathToURL(this.currentDir, fullPath, App.currentPrefix)

);

}

// add query string timestamp to avoid caching on client

_appendTimestampToURL(URL) {

return URL + '?t=' + new Date().valueOf();

}

diffPathToURL(fullPath) {

return this._pathToURL(this.diffDir, fullPath, App.diffPrefix);

}

_pathToURL(rootDir, fullPath, prefix) {

const relPath = path.relative(rootDir, fullPath);

return prefix + '/' + encodeURI(relPath);

}

static get refPrefix() {

return '/ref';

}

static get currentPrefix() {

return '/curr';

}

static get diffPrefix() {

return '/diff';

}

};