{
    "parser": "babel-eslint",
    "parserOptions": {
        "ecmaVersion": 2017,
        "sourceType": "module"
    },

    "plugins": [
        "react",
        "flowtype"
    ],

    "env": {
        "mocha": true, // needed for tests. Apply it globaly till eslint/selint#3611
        "browser": true,
        "commonjs": true,
        "es6": true
    },

    "extends": [
        "eslint:recommended",
        "plugin:flowtype/recommended"
    ],

    "settings": {
        "react": {
            "version": "detect"
        }
    },

    // @see: http://eslint.org/docs/rules/
    "rules": {
        // possible errors (including eslint:recommended)
        "valid-jsdoc": ["warn", {
            "requireParamDescription": false,
            "requireReturn": false,
            "requireReturnDescription": false,
            "prefer": {
                "returns": "return"
            },
            "preferType": {
                "String": "string",
                "Object": "object",
                "Number": "number",
                "Function": "function"
            }
        }],

        // best practice
        "block-scoped-var": "error",
        "curly": "error",
        "default-case": "warn",
        "dot-location": ["error", "property"],
        "dot-notation": "error",
        "eqeqeq": ["error", "smart"],
        "no-alert": "error",
        "no-console": "off",
        "no-caller": "error",
        "no-case-declarations": "error",
        "no-div-regex": "error",
        "no-else-return": "error",
        "no-empty-pattern": "error",
        "no-eq-null": "error",
        "no-eval": "error",
        "no-extend-native": "error",
        "no-extra-bind": "warn",
        "no-fallthrough": "error",
        "no-floating-decimal": "warn",
        "no-implied-eval": "error",
        "no-invalid-this": "off",
        "no-labels": "error",
        "no-lone-blocks": "warn",
        "no-loop-func": "error",
        "no-multi-spaces": "error",
        "no-multi-str": "error",
        "no-native-reassign": "error",
        "no-new-wrappers": "warn",
        "no-new": "warn",
        "no-octal-escape": "warn",
        "no-octal": "error",
        "no-proto": "error",
        "no-redeclare": "warn",
        "no-script-url": "error",
        "no-self-compare": "error",
        "no-sequences": "error",
        "no-throw-literal": "error",
        "flowtype/no-unused-expressions": ["warn", {"allowShortCircuit": true, "allowTernary": true}],
        "no-useless-call": "warn",
        "no-useless-concat": "warn",
        "no-void": "error",
        "no-with": "error",
        "radix": "error",
        "wrap-iife": "error",
        "yoda": "warn",
        "no-constant-condition": "error",

        // strict mode
        "strict": ["warn", "never"], // babel все сделает за нас

        // variables
        "no-catch-shadow": "error",
        "no-delete-var": "error",
        "no-label-var": "error",
        "no-shadow-restricted-names": "error",
        "no-shadow": "off",
        "no-undef-init": "error",
        "no-undef": "error",
        "no-use-before-define": ["warn", "nofunc"],
        "no-restricted-globals": ["error",
            "localStorage", "sessionStorage", // we have our own localStorage module
            "event"
        ],

        // CommonJS
        "no-mixed-requires": "warn",
        "no-path-concat": "warn",

        // stylistic
        "array-bracket-spacing": "error",
        "block-spacing": ["error", "never"],
        "brace-style": ["error", "1tbs", {"allowSingleLine": true}],
        "comma-spacing": "error",
        "comma-style": "error",
        "comma-dangle": ["warn", "only-multiline"],
        "computed-property-spacing": "error",
        "consistent-this": ["error", "that"],
        "camelcase": "warn",
        "eol-last": "warn",
        "id-length": ["error", {"min": 2, "exceptions": ["x", "y", "i", "k", "l", "m", "n", "$", "_"]}],
        "indent": ["error", 4, {"SwitchCase": 1}],
        "jsx-quotes": "error",
        "key-spacing": ["error", {"mode": "minimum"}],
        "linebreak-style": "error",
        "max-depth": "error",
        "new-cap": "error",
        "new-parens": "error",
        "no-array-constructor": "warn",
        "no-bitwise": "warn",
        "no-lonely-if": "error",
        "no-negated-condition": "warn",
        "no-nested-ternary": "error",
        "no-new-object": "error",
        "no-spaced-func": "error",
        "no-trailing-spaces": "warn",
        "no-unneeded-ternary": "warn",
        "one-var": ["error", "never"],
        "operator-assignment": ["warn", "always"],
        "operator-linebreak": ["error", "before"],
        "padded-blocks": ["warn", "never"],
        "quote-props": ["warn", "as-needed"],
        "quotes": ["warn", "single"],
        "semi": "error",
        "semi-spacing": "error",
        "keyword-spacing": "warn",
        "space-before-blocks": "error",
        "space-before-function-paren": ["error", {
            "anonymous": "never",
            "named": "never",
            "asyncArrow": "always"
        }],
        "space-in-parens": "warn",
        "space-infix-ops": "warn",
        "space-unary-ops": "error",
        "spaced-comment": "warn",

        // es6
        "arrow-body-style": "off",
        "arrow-parens": "error",
        "arrow-spacing": "error",
        "constructor-super": "error",
        "generator-star-spacing": "warn",
        "no-class-assign": "error",
        "no-const-assign": "error",
        "no-dupe-class-members": "error",
        "no-this-before-super": "error",
        "no-var": "warn",
        "object-shorthand": "warn",
        "prefer-arrow-callback": "warn",
        "prefer-const": "warn",
        "prefer-reflect": ["warn", {"exceptions": ["delete"]}],
        "prefer-spread": "warn",
        "prefer-template": "warn",
        "require-yield": "error",

        // react
        "react/display-name": "off",
        "react/react-in-jsx-scope": "warn",
        "react/forbid-prop-types": "warn",
        "react/jsx-boolean-value": "warn",
        "react/jsx-closing-bracket-location": "off", // can not configure for our code style
        "react/jsx-curly-spacing": "warn",
        "react/jsx-handler-names": ["warn", {"eventHandlerPrefix": "on", "eventHandlerPropPrefix": "on"}],
        "react/jsx-indent-props": "warn",
        "react/jsx-key": "warn",
        "react/jsx-max-props-per-line": ["warn", {"maximum": 3}],
        "react/jsx-no-bind": "off",
        "react/jsx-no-duplicate-props": "warn",
        "react/jsx-no-literals": "off",
        "react/jsx-no-undef": "error",
        "react/jsx-pascal-case": "warn",
        "react/jsx-uses-react": "warn",
        "react/jsx-uses-vars": "warn",
        "react/jsx-no-comment-textnodes": "warn",
        "react/jsx-wrap-multilines": "warn",
        "react/no-deprecated": "warn",
        "react/no-did-mount-set-state": "warn",
        "react/no-did-update-set-state": "warn",
        "react/no-direct-mutation-state": "warn",
        "react/require-render-return": "warn",
        "react/no-is-mounted": "warn",
        "react/no-multi-comp": "off",
        "react/no-string-refs": "warn",
        "react/no-unknown-property": "warn",
        "react/prefer-es6-class": "warn",
        "react/prop-types": "off", // using flowtype for this task
        "react/self-closing-comp": "warn",
        "react/sort-comp": ["off", {"order": ["lifecycle", "render", "everything-else"]}],

        "flowtype/boolean-style": ["error", "bool"],
    }
}