module.exports = function (config) {
  const options = {
    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: 'src',

    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ['jasmine', 'sinon'],

    // list of files / patterns to load in the browser. Leave empty for webpack projects
    // files: [],

    // list of files to exclude
    exclude: [],

    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {},

    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['progress'],

    // configure optional coverage, enable via --env.codeCoverage
    coverageReporter: {
      dir: require('path').join(__dirname, './coverage'),
      subdir: '.',
      reporters: [{ type: 'html' }, { type: 'text-summary' }],
    },

    // web server hostname
    hostname: '127.0.0.1',

    // web server port
    port: 9876,

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

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

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

    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: [],

    customLaunchers: {
      android: {
        base: 'NS',
        platform: 'android',
      },
      ios: {
        base: 'NS',
        platform: 'ios',
      },
      ios_simulator: {
        base: 'NS',
        platform: 'ios',
        arguments: ['--emulator'],
      },
    },

    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: false,
  };

  if (config._NS && config._NS.env && config._NS.env.codeCoverage) {
    options.reporters = (options.reporters || []).concat(['coverage']);
  }

  config.set(options);
};
