const json = require('@rollup/plugin-json');

// Karma configuration
module.exports = function (config) {

	// 	var libSources = require(__dirname + '/../build/build.js').getFiles();

	const files = [
		'spec/before.js',
		'src/LeafletWithGlobals.js',
		'spec/after.js',
		'node_modules/ui-event-simulator/ui-event-simulator.js',
		'node_modules/prosthetic-hand/dist/prosthetic-hand.js',
		'spec/suites/SpecHelper.js',
		'spec/suites/**/*.js',
		'dist/*.css',
		{pattern: 'dist/images/*.png', included: false, serve: true}
	];

	const preprocessors = {};

	preprocessors['src/LeafletWithGlobals.js'] = ['rollup'];

	config.set({
		// base path, that will be used to resolve files and exclude
		basePath: '../',

		plugins: [
			'karma-rollup-preprocessor',
			'karma-mocha',
			'karma-sinon',
			'karma-expect',
			'karma-chrome-launcher',
			'karma-safarinative-launcher',
			'karma-firefox-launcher',
			'karma-time-stats-reporter'
		],

		// frameworks to use
		frameworks: ['mocha', 'sinon', 'expect'],

		// list of files / patterns to load in the browser
		files,
		proxies: {
			'/base/dist/images/': 'dist/images/'
		},
		exclude: [],

		// Rollup the ES6 Leaflet sources into just one file, before tests
		preprocessors,
		rollupPreprocessor: {
			onwarn: () => {}, // silence Rollup warnings
			plugins: [
				json()
			],
			output: {
				format: 'umd',
				name: 'leaflet',
				freeze: false,
			},
		},

		// test results reporter to use
		// possible values: 'dots', 'progress', 'junit', 'growl', 'coverage'
		reporters: ['progress', 'time-stats'],

		timeStatsReporter: {
			reportTimeStats: false,
			longestTestsCount: 10
		},

		// web server port
		port: 9876,

		// level of logging
		// possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
		logLevel: config.LOG_WARN,

		// enable / disable colors in the output (reporters and logs)
		colors: true,

		// enable / disable watching file and executing tests whenever any file changes
		autoWatch: false,

		// Start these browsers, currently available:
		// - Chrome
		// - ChromeCanary
		// - Firefox
		// - Opera
		// - SafariNative (only Mac)
		browsers: ['Chrome1280x1024'],

		customLaunchers: {
			'Chrome1280x1024': {
				base: 'ChromeHeadless',
				// increased viewport is required for some tests (TODO fix tests)
				// https://github.com/Leaflet/Leaflet/issues/7113#issuecomment-619528577
				flags: ['--window-size=1280,1024']
			},
			'FirefoxTouch': {
				base: 'FirefoxHeadless',
				prefs: {
					'dom.w3c_touch_events.enabled': 1
				}
			},
			'FirefoxNoTouch': {
				base: 'FirefoxHeadless',
				prefs: {
					'dom.w3c_touch_events.enabled': 0
				}
			},
			'FirefoxRetina': {
				base: 'FirefoxHeadless',
				prefs: {
					'layout.css.devPixelsPerPx': 2
				}
			}
		},

		concurrency: 1,

		// If browser does not capture in given timeout [ms], kill it
		captureTimeout: 60000,

		// Timeout for the client socket connection [ms].
		browserSocketTimeout: 30000,

		// Silence console.warn output in the terminal
		browserConsoleLogOptions: {level: 'error'},

		// Continuous Integration mode
		// if true, it capture browsers, run tests and exit
		singleRun: true,

		client: {
			mocha: {
				// eslint-disable-next-line no-undef
				forbidOnly: process.env.CI || false
			}
		}
	});
};