// http://eslint.org/docs/user-guide/configuring

module.exports = {
    root         : true,
    parser       : 'babel-eslint',
    parserOptions: {
        sourceType: 'module',
        ecmaVersion: 2017,
    },
    env          : {
        es6    : true,
        browser: true,
    },
    globals      : {
        module : true,
        require: true,
    },
    // https://github.com/feross/standard/blob/master/RULES.md#javascript-standard-style
    // extends      : 'standard',
    // required to lint *.vue files
    plugins      : [
        'html',
    ],
    // add your custom rules here
    rules        : {
        // Basic rules
        indent: "off",
        "indent-legacy"                : [
            "error",
            4,
            {
                "SwitchCase"         : 1,
                "VariableDeclarator" : {
                    "var"  : 1,
                    "let"  : 1,
                    "const": 1,
                },
                "outerIIFEBody"      : 0,
                "MemberExpression"   : 1,
                "FunctionDeclaration": {
                    "parameters": "first",
                },
                "FunctionExpression" : {
                    "parameters": "first",
                },
                "CallExpression"     : {
                    "arguments": "first",
                },
            },
        ],
        "keyword-spacing"              : [
            "error",
            {
                "before": true,
                "after" : true,
            },
        ],
        "brace-style"                  : [
            "error",
            "1tbs",
            {
                "allowSingleLine": true,
            },
        ],
        // Do not use "space-infix-ops": "error", for ternary operators
        "arrow-spacing"                : [
            "error",
            {
                "before": true,
                "after" : true,
            },
        ],
        "arrow-parens"                 : [
            "error",
            "as-needed",
        ],
        "arrow-body-style"             : [
            "error",
            "as-needed",
            {
                requireReturnForObjectLiteral: false,
            },
        ],
        "no-confusing-arrow"           : [
            "error",
            {
                "allowParens": true,
            },
        ],
        "space-before-function-paren"  : [
            "error",
            {
                "anonymous" : "never",
                "named"     : "never",
                "asyncArrow": "always",
            },
        ],
        "space-before-blocks"          : "error",
        "linebreak-style"              : [
            "error",
            "unix",
        ],
        "newline-per-chained-call"     : [
            "error",
            {
                "ignoreChainWithDepth": 2,
            }
        ],
        "object-curly-spacing"         : [
            "error",
            "always",
        ],
        "array-bracket-spacing"        : [
            "error",
            "never",
        ],
        "no-whitespace-before-property": "error",
        "padded-blocks"                : [
            "error",
            "never",
        ],
        "space-in-parens"              : [
            "error",
            "never",
        ],
        "camelcase"                    : [
            "error",
            {
                properties: "always",
            }
        ],
        "new-cap"                      : "error",
        "no-underscore-dangle"         : 0,
        "quotes"                       : [
            "error",
            "single", // Backticks are allowed due to substitution
            {
                "allowTemplateLiterals": true,
                "avoidEscape"          : true,
            },
        ],
        "semi"                         : [
            "error",
            "always",
        ],
        "semi-spacing"                 : "error",
        "curly"                        : [
            "error",
            "multi-line",
            "consistent",
        ],
        "prefer-const"                 : "error",
        "no-const-assign"              : "error",
        "no-var"                       : "error",
        "no-new-object"                : "error",
        "object-shorthand"             : "error",
        "quote-props"                  : [
            "error",
            "as-needed",
        ],
        "no-array-constructor"         : "error",
        "func-style"                   : [
            "error",
            "declaration",
            {
                "allowArrowFunctions": true,
            },
        ],
        "no-loop-func"                 : "error",
        "no-new-func"                  : "error",
        "prefer-spread"                : "error",
        "prefer-arrow-callback"        : "error",
        "no-useless-constructor"       : "error",
        "no-dupe-class-members"        : "error",
        "no-duplicate-imports"         : [
            "error",
            {
                "includeExports": true,
            },
        ],
        "no-func-assign"               : "error",
        "no-class-assign"              : "error",
        "no-iterator"                  : "error",
        "dot-notation"                 : "error",
        "no-undef"                     : "error",
        "one-var"                      : [
            "error",
            "never",
        ],
        "radix"                        : [
            "error",
            "always",
        ],

        // Other misc rules
        "no-unneeded-ternary"   : "error",
        "no-nested-ternary"     : "error",
        "no-unreachable"        : "error",
        "use-isnan"             : "error",
        "no-unsafe-negation"    : "error",
        "no-extra-semi"         : "error",
        "no-sparse-arrays"      : "error",
        "no-eq-null"            : "error",
        "eqeqeq"                : "error",
        "no-eval"               : "error",
        "strict"                : [
            "error",
            "safe",
        ],
        "no-useless-escape"     : "error",
        "prefer-rest-params"    : "error",
        "generator-star-spacing": [
            "error",
            {
                "before": false,
                "after" : true,
            }
        ],
        "no-case-declarations"  : "error",
        "spaced-comment"        : [
            "error",
            "always",
            {
                "line" : {
                    "markers"   : ["/", "TODO", "FIXME", "DEBUG", "XXX"],
                    "exceptions": ["-", "+", "TODO", "FIXME", "DEBUG", "XXX"],
                },
                "block": {
                    "markers"   : ["!"],
                    "exceptions": ["*"],
                    "balanced"  : true,
                }
            }
        ],
        "eol-last"              : [
            "error",
            "always",
        ],
        "comma-style"           : [
            "error",
            "last",
        ],
        "comma-dangle"          : [
            "error",
            "always-multiline",
        ],

        // allow debugger during development
        'no-debugger': (process.env.NODE_ENV === 'production')?2:0,

        /*"valid-jsdoc": [ //FIXME uncomment
         "error", {
         "prefer"                  : {
         "arg"     : "param",
         "argument": "param",
         "class"   : "constructor",
         "return"  : "returns",
         "virtual" : "abstract",
         },
         "requireReturn"           : false,
         "requireParamDescription" : false, //TODO Ideally, this should be set to true
         "requireReturnDescription": false, //TODO Ideally, this should be set to true
         }
         ],*/
        //TODO This should really be enabled by default :
        // 'no-invalid-this': "error",
        /*"wrap-iife": [
         "error",
         "inside"
         ],*/
        /*"yoda": [
         "error",
         "always",
         {
         "onlyEquality": true,
         },
         ],*/
        // "no-param-reassign"              : "error",
        // "import/prefer-default-export"   : "error",
        // "import/first"                   : "error",
        // "import/no-webpack-loader-syntax": "error",
    }
};