module.exports = {
  extends: ['prettier', 'plugin:jest/recommended'],
  parser: 'babel-eslint',
  env: {
    browser: true,
    es6: true
  },
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'module',
    ecmaFeatures: {
      arrowFunctions: true,
      blockBindings: true,
      classes: true,
      defaultParams: true,
      destructuring: true,
      forOf: true,
      generators: true,
      modules: true,
      objectLiteralComputedProperties: true,
      objectLiteralShorthandMethods: true,
      objectLiteralShorthandProperties: true,
      restParams: true,
      spread: true,
      superInFunctions: true,
      templateStrings: true,
      unicodeCodePointEscapes: true
    }
  },
  globals: {
    inject: false,
    module: false,
    jasmine: false,
    sinon: false,
    describe: false,
    it: false,
    before: false,
    beforeEach: false,
    beforeAll: false,
    after: false,
    afterEach: false,
    afterAll: false,
    expect: false,
    window: false,
    document: false,
    jest: false,
    spyOn: false,
    __DEV__: false,
    __PRERELEASE__: false,
    __dirname: false,
    Promise: false,
    jsdom: false,
    cy: false,
    Cypress: false
  },
  plugins: ['babel', 'jest', 'prettier'],
  rules: {
    'no-cond-assign': [2, 'always'],
    'no-console': 0, // disable during development
    'no-constant-condition': 2,
    'no-control-regex': 2,
    'no-debugger': 0, // disabled during development
    'no-dupe-args': 2,
    'no-dupe-keys': 2,
    'no-duplicate-case': 2,
    'no-empty-character-class': 2,
    'no-empty': 2,
    'no-ex-assign': 2,
    'no-extra-boolean-cast': 2,
    'no-func-assign': 2,
    'no-inner-declarations': 2,
    'no-invalid-regexp': 2,
    'no-irregular-whitespace': 2,
    'no-negated-in-lhs': 2,
    'no-obj-calls': 2,
    'no-regex-spaces': 2,
    'no-sparse-arrays': 2,
    'no-unreachable': 2,
    'use-isnan': 2,
    'valid-jsdoc': 2,
    'valid-typeof': 2,
    'no-unexpected-multiline': 2,
    // # Best Practices http://eslint.org/docs/rules/#best-practices
    'accessor-pairs': [2, { setWithoutGet: true }],
    'block-scoped-var': 2,
    complexity: [2, 10],
    'consistent-return': 2,
    curly: 2,
    'default-case': 2,
    'dot-notation': 2,
    eqeqeq: [2, 'smart'],
    'guard-for-in': 2,
    'no-alert': 0, // disabled during development
    'no-caller': 2,
    'no-div-regex': 2,
    'no-else-return': 2,
    'no-eq-null': 2,
    'no-eval': 2,
    'no-extend-native': 2,
    'no-extra-bind': 2, // this is pretty cool
    'no-fallthrough': 2,
    'no-floating-decimal': 2,
    'no-implicit-coercion': 0, // debatable
    'no-implied-eval': 2,
    'no-iterator': 2,
    'no-labels': 2,
    'no-lone-blocks': 2,
    'no-loop-func': 2,
    'no-multi-str': 2,
    'no-native-reassign': 2,
    'no-new-func': 2,
    'no-new-wrappers': 2,
    'no-new': 2,
    'no-octal-escape': 2,
    'no-octal': 2,
    'no-param-reassign': [2, { props: false }],
    'no-process-env': 2, // webpack may violate this
    'no-proto': 2,
    'no-redeclare': 2,
    'no-return-assign': 2,
    'no-script-url': 2,
    'no-self-compare': 2,
    'no-sequences': 2,
    'no-throw-literal': 2,
    'no-unused-expressions': 2,
    'no-useless-call': 2,
    'no-useless-concat': 2,
    'no-void': 2,
    'no-warning-comments': [
      1,
      { terms: ['todo', 'fixme', 'xxx'], location: 'start' }
    ],
    'no-with': 2,
    radix: 2,
    'vars-on-top': 2,
    yoda: 2,
    // # Strict Mode http://eslint.org/docs/rules/#strict-mode
    strict: [2, 'function'],
    // # Variables http://eslint.org/docs/rules/#variables
    'init-declarations': [2, 'always'],
    'no-catch-shadow': 2,
    'no-delete-var': 2,
    'no-label-var': 2,
    'no-shadow-restricted-names': 2,
    'no-shadow': 2,
    'no-undef-init': 2,
    'no-undef': 2,
    'no-undefined': 2,
    'no-unused-vars': [2, { vars: 'all', args: 'after-used' }],
    'no-use-before-define': 2,
    // # Node.js and CommonJS http://eslint.org/docs/rules/#nodejs-and-commonjs
    'callback-return': 2,
    'handle-callback-err': 0,
    'no-mixed-requires': [1, true],
    'no-new-require': 2,
    'no-path-concat': 2,
    'no-restricted-modules': [
      2,
      'assert',
      'buffer',
      'child_process',
      'cluster',
      'crypto',
      'dgram',
      'dns',
      'domain',
      'events',
      'freelist',
      'fs',
      'http',
      'https',
      'module',
      'net',
      'os',
      'path',
      'punycode',
      'querystring',
      'readline',
      'repl',
      'smalloc',
      'stream',
      'string_decoder',
      'sys',
      'timers',
      'tls',
      'tracing',
      'tty',
      'url',
      'util',
      'vm',
      'zlib'
    ],
    'no-sync': 2,
    // # Stylistic Issues http://eslint.org/docs/rules/#stylistic-issues
    camelcase: [0, { properties: 'always' }],
    'consistent-this': [2, 'self'],
    'func-names': 0,
    'func-style': 0,
    'id-length': [
      2,
      { min: 1, max: 100, properties: 'always', exceptions: [] }
    ],
    'id-match': 0,
    'lines-around-comment': [2, { beforeBlockComment: true }],
    'linebreak-style': [2, 'unix'],
    'max-nested-callbacks': [0, 3],
    'new-cap': 0,
    'newline-after-var': [0, 'always'],
    'no-array-constructor': 2,
    'no-continue': 2,
    'no-inline-comments': 0,
    'no-lonely-if': 2,
    'no-nested-ternary': 2,
    'no-new-object': 2,
    'no-ternary': 0,
    'no-underscore-dangle': 0,
    'no-unneeded-ternary': 2,
    'object-curly-spacing': [0, 'never'],
    'one-var': 0, //turned off
    'operator-assignment': [2, 'always'],
    quotes: [2, 'single', 'avoid-escape'],
    'sort-vars': 0,
    'spaced-comment': [2, 'always'],
    // # ECMAScript 6 http://eslint.org/docs/rules/#ecmascript-6
    'arrow-body-style': [2, 'as-needed'],
    'constructor-super': 2,
    'no-class-assign': 2,
    'no-const-assign': 2,
    'no-dupe-class-members': 2,
    'no-this-before-super': 2,
    'no-var': 1, // difficult for legacy code
    'object-shorthand': 2,
    'prefer-arrow-callback': 2,
    'prefer-const': 0,
    'prefer-spread': 2,
    'prefer-template': 2,
    'require-yield': 2,
    // # Legacy http://eslint.org/docs/rules/#legacy
    'max-depth': [2, 4], // TODO: need to dial this in
    'max-len': [
      2,
      200,
      2,
      {
        ignoreComments: true,
        ignoreUrls: true,
        ignorePattern: '^\\s*var\\s.+=\\s*require\\s*\\('
      }
    ], // TODO: need to dial this in
    'max-params': [2, 5],
    'max-statements': [2, 200], //decrease when possible
    'no-bitwise': 0,
    'no-plusplus': 0,
    'babel/no-invalid-this': 2
  }
};