/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

export default [
  {
    rules: {
      // Rules from the mozilla plugin
      "mozilla/balanced-listeners": "error",
      "mozilla/no-aArgs": "error",
      "mozilla/var-only-at-top-level": "error",
      // Disable reject-importGlobalProperties because we don't want to include
      // these in the sandbox directly as that would potentially mean the
      // imported properties would be instatiated up-front rather than lazily.
      "mozilla/reject-importGlobalProperties": "off",

      // Functions are not required to consistently return something or nothing
      "consistent-return": "off",

      // Disallow empty statements. This will report an error for:
      // try { something(); } catch (e) {}
      // but will not report it for:
      // try { something(); } catch (e) { /* Silencing the error because ...*/ }
      // which is a valid use case.
      "no-empty": "error",

      // No expressions where a statement is expected
      "no-unused-expressions": "error",

      // No declaring variables that are never used
      "no-unused-vars": [
        "error",
        {
          argsIgnorePattern: "^_",
          caughtErrors: "none",
          vars: "all",
          varsIgnorePattern: "^console$",
        },
      ],

      // No using things before they're defined.
      "no-use-before-define": [
        "error",
        {
          allowNamedExports: true,
          classes: true,
          // The next two being false allows idiomatic patterns which are more
          // type-inference friendly.  Functions are hoisted, so this is safe.
          functions: false,
          // This flag is only meaningful for `var` declarations.
          // When false, it still disallows use-before-define in the same scope.
          // Since we only allow `var` at the global scope, this is no worse than
          // how we currently declare an uninitialized `let` at the top of file.
          variables: false,
        },
      ],

      // Disallow using variables outside the blocks they are defined (especially
      // since only let and const are used, see "no-var").
      "block-scoped-var": "error",

      // Warn about cyclomatic complexity in functions.
      complexity: "error",

      // Don't warn for inconsistent naming when capturing this (not so important
      // with auto-binding fat arrow functions).
      // "consistent-this": ["error", "self"],

      // Don't require a default case in switch statements. Avoid being forced to
      // add a bogus default when you know all possible cases are handled.
      "default-case": "off",

      // Allow using == instead of ===, in the interest of landing something since
      // the devtools codebase is split on convention here.
      eqeqeq: "off",

      // Don't require function expressions to have a name.
      // This makes the code more verbose and hard to read. Our engine already
      // does a fantastic job assigning a name to the function, which includes
      // the enclosing function name, and worst case you have a line number that
      // you can just look up.
      "func-names": "off",

      // Allow use of function declarations and expressions.
      "func-style": "off",

      // Maximum depth callbacks can be nested.
      "max-nested-callbacks": ["error", 4],

      // Don't limit the number of parameters that can be used in a function.
      "max-params": "off",

      // Don't limit the maximum number of statement allowed in a function. We
      // already have the complexity rule that's a better measurement.
      "max-statements": "off",

      // Don't require a capital letter for constructors, only check if all new
      // operators are followed by a capital letter. Don't warn when capitalized
      // functions are used without the new operator.
      "new-cap": ["off", { capIsNew: false }],

      // Allow use of bitwise operators.
      "no-bitwise": "off",

      // Allow use of the continue statement.
      "no-continue": "off",

      // Allow division operators explicitly at beginning of regular expression.
      "no-div-regex": "off",

      // Disallow adding to native types
      "no-extend-native": "error",

      // Allow comments inline after code.
      "no-inline-comments": "off",

      // Disallow use of labels for anything other then loops and switches.
      "no-labels": ["error", { allowLoop: true }],

      // Disallow use of multiline strings (use template strings instead).
      "no-multi-str": "error",

      // Allow reassignment of function parameters.
      "no-param-reassign": "off",

      // Allow string concatenation with __dirname and __filename (not a node env).
      "no-path-concat": "off",

      // Allow use of unary operators, ++ and --.
      "no-plusplus": "off",

      // Allow using process.env (not a node environment).
      "no-process-env": "off",

      // Allow using process.exit (not a node environment).
      "no-process-exit": "off",

      // Disallow usage of __proto__ property.
      "no-proto": "error",

      // Don't restrict usage of specified node modules (not a node environment).
      "no-restricted-modules": "off",

      // Disallow use of assignment in return statement. It is preferable for a
      // single line of code to have only one easily predictable effect.
      "no-return-assign": "error",

      // Allow use of synchronous methods (not a node environment).
      "no-sync": "off",

      // Allow the use of ternary operators.
      "no-ternary": "off",

      // Allow dangling underscores in identifiers (for privates).
      "no-underscore-dangle": "off",

      // Allow use of undefined variable.
      "no-undefined": "off",

      // We use var-only-at-top-level instead of no-var as we allow top level
      // vars.
      "no-var": "off",

      // Allow using TODO/FIXME comments.
      "no-warning-comments": "off",

      // Don't require method and property shorthand syntax for object literals.
      // We use this in the code a lot, but not consistently, and this seems more
      // like something to check at code review time.
      "object-shorthand": "off",

      // Allow more than one variable declaration per function.
      "one-var": "off",

      // Require use of the second argument for parseInt().
      radix: "error",

      // Don't require to sort variables within the same declaration block.
      // Anyway, one-var is disabled.
      "sort-vars": "off",

      // Require "use strict" to be defined globally in the script.
      strict: ["error", "global"],

      // Allow vars to be declared anywhere in the scope.
      "vars-on-top": "off",

      // Disallow Yoda conditions (where literal value comes first).
      yoda: "error",

      // Disallow function or variable declarations in nested blocks
      "no-inner-declarations": "error",

      // Disallow labels that share a name with a variable
      "no-label-var": "error",
    },
  },
  {
    files: ["test/xpcshell/head*.js", "test/browser/head*.js"],
    rules: {
      "no-unused-vars": [
        "error",
        {
          argsIgnorePattern: "^_",
          caughtErrors: "none",
          vars: "local",
        },
      ],
    },
  },
];
