module.exports = {

  globals: {},

  parser: 'vue-eslint-parser',

  extends: [
    'eslint:recommended',
    'plugin:jsdoc/recommended',
    'plugin:vue/recommended'
  ],

  plugins: [
    'eslint-plugin-jsdoc',
    'eslint-plugin-vue',
    'eslint-plugin-import'
  ],

  rules: {
    // Possible Errors https://eslint.org/docs/rules/#possible-errors
    'no-await-in-loop': 'warn',
    'no-console': 'warn',
    'no-constant-condition': ['error', { checkLoops: false }],
    'no-dupe-else-if': 'error',
    'no-extra-parens': ['error', 'functions'],
    'no-import-assign': 'error',
    'no-setter-return': 'error',
    'no-template-curly-in-string': 'error',
    'valid-typeof': ['error', { requireStringLiterals: true }],

    // Best Practices https://eslint.org/docs/rules/#best-practices
    'array-callback-return': ['error', { allowImplicit: false }],
    'block-scoped-var': 'error',
    'class-methods-use-this': 'error',
    complexity: ['warn', { max: 10 }],
    'consistent-return': ['error', { treatUndefinedAsUnspecified: false }],
    curly: ['error', 'multi'],
    'default-case': ['error', { commentPattern: '^no\\sdefault' }],
    'default-param-last': 'error',
    'dot-location': ['error', 'property'],
    'dot-notation': ['error', { allowKeywords: true }],
    eqeqeq: ['error', 'always'],
    'grouped-accessor-pairs': ['error', 'getBeforeSet'],
    'guard-for-in': 'error',
    'max-classes-per-file': ['error', 1],
    'no-alert': 'error',
    'no-caller': 'error',
    'no-constructor-return': 'error',
    'no-div-regex': 'error',
    'no-else-return': ['error', { allowElseIf: false }],
    'no-empty-function': 'error',
    'no-eq-null': 'error',
    'no-eval': ['error', { allowIndirect: false }],
    'no-extend-native': 'error',
    'no-extra-bind': 'error',
    'no-extra-label': 'error',
    'no-fallthrough': ['error', { commentPattern: 'break[\\s\\w]*omitted' }],
    'no-floating-decimal': 'error',
    'no-implicit-coercion': 'error',
    'no-implicit-globals': 'error',
    'no-implied-eval': 'error',
    'no-invalid-this': 'error',
    'no-iterator': 'error',
    'no-lone-blocks': 'error',
    'no-loop-func': 'error',
    'no-magic-numbers': [
      'warn',
      {
        enforceConst: true,
        ignoreArrayIndexes: true,
        detectObjects: true,
        ignore: [-2, -1, 0, 1, 2, 10]
      }
    ],
    'no-multi-spaces': 'error',
    'no-multi-str': 'error',
    'no-new': 'error',
    'no-new-func': 'error',
    'no-new-wrappers': 'error',
    'no-octal-escape': 'error',
    'no-param-reassign': 'error',
    'no-proto': 'error',
    'no-restricted-properties': 'error',
    'no-return-assign': ['error', 'except-parens'],
    'no-return-await': 'error',
    'no-script-url': 'error',
    'no-self-compare': 'error',
    'no-sequences': 'error',
    'no-throw-literal': 'error',
    'no-unmodified-loop-condition': 'error',
    'no-unused-expressions': 'error',
    'no-useless-call': 'error',
    'no-useless-concat': 'error',
    'no-useless-return': 'error',
    'no-void': 'error',
    'no-warning-comments': 'warn',
    'prefer-named-capture-group': 'warn',
    'prefer-promise-reject-errors': 'error',
    'prefer-regex-literals': 'error',
    radix: ['error', 'as-needed'],
    'require-await': 'error',
    'require-unicode-regexp': 'error',
    'vars-on-top': 'error',
    'wrap-iife': ['error', 'inside'],
    yoda: ['error', 'never', { exceptRange: true }],

    // Strict Mode https://eslint.org/docs/rules/#strict-mode
    strict: ['error', 'safe'],

    // Variables https://eslint.org/docs/rules/#variables
    'init-declarations': ['error', 'always'],
    'no-label-var': 'error',
    'no-shadow': ['error', { builtinGlobals: true, hoist: 'all' }],
    'no-undef-init': 'error',
    'no-undefined': 'error',
    'no-use-before-define': 'error',

    // Node.js and CommonJS https://eslint.org/docs/rules/#node-js-and-commonjs
    'callback-return': 'error',
    'global-require': 'error',
    'handle-callback-err': 'error',
    'no-buffer-constructor': 'error',
    'no-mixed-requires': 'error',
    'no-new-require': 'error',
    'no-path-concat': 'error',
    'no-process-env': 'warn',
    'no-process-exit': 'warn',
    'no-sync': ['error', { allowAtRootLevel: true }],

    // Stylistic Issues https://eslint.org/docs/rules/#stylistic-issues
    'array-bracket-newline': ['error', { multiline: true, minItems: 2 }],
    'array-bracket-spacing': ['error', 'always'],
    'array-element-newline': ['error', { multiline: true, minItems: 2 }],
    'block-spacing': ['error', 'always'],
    'brace-style': ['error', 'stroustrup', { allowSingleLine: true }],
    camelcase: 'off',
    'id-match': ['error', '^[a-z][a-z_]*$', { onlyDeclarations: true }],
    'comma-dangle': ['error', 'never'],
    'comma-spacing': 'error',
    'comma-style': 'error',
    'computed-property-spacing': ['error', 'never'],
    'consistent-this': 'error',
    'eol-last': 'error',
    'func-call-spacing': ['error', 'always'],
    'func-name-matching': ['error', 'always'],
    'func-names': ['error', 'always'],
    'func-style': ['error', 'declaration', { allowArrowFunctions: true }],
    'function-call-argument-newline': ['error', 'consistent'],
    'function-paren-newline': ['error', 'multiline-arguments'],
    'implicit-arrow-linebreak': ['error', 'beside'],
    indent: ['error', 2, { SwitchCase: 1 }],
    'jsx-quotes': 'error',
    'key-spacing': [
      'error',
      {
        singleLine: {
          beforeColon: false,
          afterColon: true,
          mode: 'strict'
        },
        align: {
          on: 'value',
          beforeColon: false,
          afterColon: true,
          mode: 'minimum'
        },
        multiLine: {
          beforeColon: false,
          afterColon: true,
          mode: 'strict'
        }
      }
    ],
    'keyword-spacing': 'error',
    'line-comment-position': 'error',
    'linebreak-style': ['error', 'unix'],
    'lines-around-comment': [
      'error',
      {
        beforeBlockComment: true,
        beforeLineComment: true,
        allowBlockStart: true
      }
    ],
    'lines-between-class-members': [
      'error',
      'always',
      { exceptAfterSingleLine: true }
    ],
    'max-depth': ['error', 4],
    'max-len': ['error', { code: 80, tabWidth: 4 }],
    'max-lines': [
      'error',
      {
        max: 300,
        skipBlankLines: true,
        skipComments: true
      }
    ],
    'max-lines-per-function': [
      'error',
      {
        max: 50,
        skipBlankLines: true,
        skipComments: true,
        IIFEs: true
      }],
    'max-nested-callbacks': ['error', 3],
    'max-params': ['error', 5],
    'max-statements': ['error', 20],
    'max-statements-per-line': 'error',
    'multiline-comment-style': ['error', 'starred-block'],
    'multiline-ternary': ['error', 'always-multiline'],
    'new-parens': ['error', 'never'],
    'newline-per-chained-call': ['error', { ignoreChainWithDepth: 1 }],
    'no-array-constructor': 'error',
    'no-bitwise': 'warn',
    'no-inline-comments': 'error',
    'no-lonely-if': 'error',
    'no-mixed-operators': 'error',
    'no-multi-assign': 'error',
    'no-multiple-empty-lines': ['error', { max: 2, maxEOF: 1, maxBOF: 0 }],
    'no-negated-condition': 'error',
    'no-new-object': 'error',
    'no-tabs': 'error',
    'no-trailing-spaces': 'error',
    'no-underscore-dangle': 'error',
    'no-unneeded-ternary': 'error',
    'no-whitespace-before-property': 'error',
    'nonblock-statement-body-position': ['error', 'below'],
    'object-curly-newline': ['error', { multiline: true }],
    'object-curly-spacing': ['error', 'always'],
    'object-property-newline': ['error', { allowAllPropertiesOnSameLine: true }],
    'one-var': ['error', 'never'],
    'one-var-declaration-per-line': ['error', 'always'],
    'operator-assignment': ['error', 'always'],
    'operator-linebreak': ['error', 'before'],
    'padded-blocks': ['error', 'never'],
    'prefer-exponentiation-operator': 'error',
    'prefer-object-spread': 'error',
    'quote-props': ['error', 'as-needed'],
    quotes: ['error', 'single'],
    semi: ['error', 'always'],
    'semi-spacing': 'error',
    'semi-style': 'error',
    'sort-keys': [
      'warn',
      'asc',
      {
        minKeys: 10,
        natural: true,
        caseSensitive: true
      }
    ],
    'space-before-blocks': ['error', 'always'],
    'space-before-function-paren': ['error', 'always'],
    'space-in-parens': ['error', 'never'],
    'space-infix-ops': 'error',
    'space-unary-ops': [
      'error', {
        words: true,
        nonwords: false
      }],
    'spaced-comment': ['error', 'always'],
    'switch-colon-spacing': 'error',
    'template-tag-spacing': 'error',
    'unicode-bom': 'error',
    'wrap-regex': 'error',

    // ECMAScript 6 https://eslint.org/docs/rules/#ecmascript-6
    'arrow-body-style': ['error', 'as-needed'],
    'arrow-parens': 'error',
    'arrow-spacing': 'error',
    'generator-star-spacing': 'error',
    'no-confusing-arrow': 'error',
    'no-duplicate-imports': 'error',
    'no-useless-computed-key': 'error',
    'no-useless-constructor': 'error',
    'no-useless-rename': 'error',
    'no-var': 'error',
    'object-shorthand': 'error',
    'prefer-arrow-callback': 'error',
    'prefer-const': 'error',
    'prefer-destructuring': 'error',
    'prefer-numeric-literals': 'error',
    'prefer-rest-params': 'error',
    'prefer-spread': 'error',
    'prefer-template': 'error',
    'rest-spread-spacing': 'error',
    'symbol-description': 'error',
    'template-curly-spacing': 'error',
    'yield-star-spacing': 'error',

    // jsdoc
    'jsdoc/require-jsdoc': [
      'error',
      { contexts: ['Properties'] }
    ],
    'jsdoc/require-description': 'error'/*,

    // import (deactivated until wide adoption of es6 import/export)
    'import/no-unresolved': 'error',
    'import/named': 'error',
    'import/default': 'error',
    'import/namespace': 'error',
    'import/no-absolute-path': 'error',
    'import/no-dynamic-require': 'warn',
    'import/no-webpack-loader-syntax': 'error',
    'import/no-self-import': 'error',
    'import/no-cycle': 'error',
    'import/no-useless-path-segments': 'error',
    'import/no-unused-modules': 'error',
    'import/export': 'error',
    'import/no-named-as-default': 'error',
    'import/no-named-as-default-member': 'error',
    'import/no-deprecated': 'error',
    'import/no-extraneous-dependencies': 'error',
    'import/no-mutable-exports': 'error',
    'import/unambiguous': 'error',
    'import/no-commonjs': 'error',
    'import/no-amd': 'error',
    'import/first': 'error',
    'import/exports-last': 'error',
    'import/no-duplicates': 'error',
    'import/no-namespace': 'error',
    'import/extensions': 'error',
    'import/order': 'error',
    'import/newline-after-import': 'error',
    'import/prefer-default-export': 'error',
    'import/no-unassigned-import': 'error',
    'import/no-named-default': 'error',
    'import/no-anonymous-default-export': 'error',
    'import/group-exports': 'error' */
  }

}