'use strict';

const _ = require('lodash');

const {Command} = require('commander');

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

const Gemini = require('../gemini');

const pkg = require('../../package.json');

const {checkForDeprecations} = require('./deprecations');

const {handleErrors, handleUncaughtExceptions} = require('./errors');

let exitCode;

exports.run = () => {

const program = new Command();

program

.version(pkg.version)

.allowUnknownOption()

.option('-c, --config <file>', 'config file');

const configPath = preparseOption(program, 'config');

const gemini = mkGemini(configPath);

program

.option('-b, --browser <browser>', 'run test only in specified browser', collect)

.option('-s, --set <set>', 'set to run', collect)

.option('--grep <pattern>', 'run only suites matching the pattern', RegExp);

program.command('update [paths...]')

.allowUnknownOption()

.option('--diff', 'update only screenshots with diff')

.option('--new', 'save only new screenshots')

.description('update the changed screenshots or gather if they doesn\'t exist')

.action((paths, options) => mkRunFn(gemini, 'update', program)(paths, options).done());

program.command('test [paths...]')

.allowUnknownOption()

.option('-r, --reporter <reporter>', 'test result reporter (flat by default)', collect)

.description('run tests')

.on('--help', () => {

console.log(' Reporters:');

console.log(' flat console reporter');

console.log(' vflat verbose console reporter');

console.log('');

})

.action((paths, options) => mkRunFn(gemini, 'test', program)(paths, options).done());

program.command('list <key>')

.description(`Use 'list browsers' or 'list sets' to get all available browsers or sets.`)

.action((key) => logOptionFromConfig(key, gemini));

program.on('--help', () => {

console.log('');

console.log(' Overriding config:');

console.log('');

console.log(' To override any config option use full option path converted to --kebab-case.');

console.log('');

console.log(' Examples:');

console.log(' gemini test --system-debug true');

console.log(' gemini update --root-url http://example.com');

console.log(' gemini test --browsers-ie-8-window-size 1024x768');

console.log('');

console.log(' You can also use environment variables converted to snake_case with');

console.log(' gemini_ prefix.');

console.log('');

console.log(' Examples:');

console.log(' gemini_system_debug=true gemini test');

console.log(' gemini_root_url=http://example.com gemini update');

console.log(' gemini_browsers_ie8_window_size=1024x768 gemini test');

console.log('');

console.log(' If both cli flag and env var are used, cli flag takes precedence.') ;

console.log(' For more information see https://gemini-testing.github.io/doc/config.html') ;

console.log('');

});

gemini.extendCli(program);

program.parse(process.argv);

};

function preparseOption(program, option) {

// do not display any help, do not exit

const configFileParser = Object.create(program);

configFileParser.options = [].concat(program.options);

configFileParser.option('-h, --help');

configFileParser.parse(process.argv);

return configFileParser[option];

}

function mkGemini(configPath) {

checkForDeprecations();

const gemini = new Gemini(configPath, {cli: true, env: true});

gemini.on(Events.INTERRUPT, (data) => exitCode = data.exitCode);

return gemini;

}

function mkRunFn(gemini, method, globalOpts) {

return (paths, opts = {}) => {

handleUncaughtExceptions();

return gemini[method](paths, {

sets: globalOpts.set,

reporters: parseReporterOptions(opts),

grep: globalOpts.grep,

browsers: globalOpts.browser,

diff: opts.diff,

new: opts.new

})

.then((stats) => stats.failed > 0 ? 2 : 0)

.catch(handleErrors)

.then(exit);

};

}

function logOptionFromConfig(key, {config}) {

const data = {

sets: _.keys(config.sets).join(', '),

browsers: config.getBrowserIds().join(', ')

};

console.log(data[key] || `Cannot list option ${key}. Available options are: sets, browsers`);

}

function collect(newValue, array = []) {

return array.concat(newValue);

}

function parseReporterOptions(options) {

if (!options.reporter) {

return [{name: 'flat'}];

}

return options.reporter.map(function(name) {

return {

name,

path: options[`${name}ReporterPath`]

};

});

}

function exit(code) {

process.on('exit', () => process.exit(exitCode || code));

}