import { Linter } from "eslint";
import pluginMocha from "eslint-plugin-mocha";
import pluginPromise from "eslint-plugin-promise";
import pluginUnicorn from "eslint-plugin-unicorn";
import globals from "globals";
import configPrettier from "eslint-config-prettier";
import configJs from "@eslint/js";

const config: Linter.Config = {
  name: "@contentful/eslint-config-backend",
  languageOptions: {
    ecmaVersion: 2022,
    sourceType: "commonjs",

    globals: {
      ...globals.es2021,
      ...globals.node,
      ...globals.mocha,
    },
  },
  plugins: {
    mocha: pluginMocha,
    promise: pluginPromise,
    unicorn: pluginUnicorn,
  },
  rules: {
    ...configJs.configs.recommended.rules,
    // eslint
    eqeqeq: "error",
    "guard-for-in": "error",
    "max-depth": ["error", 3],
    "max-nested-callbacks": ["error", 3],
    "new-cap": ["error", { newIsCap: true, capIsNew: false }],
    "no-multi-assign": "warn",
    "no-plusplus": ["error", { allowForLoopAfterthoughts: true }],
    "no-unused-vars": [
      "error",
      { vars: "all", args: "after-used", varsIgnorePattern: "^_" },
    ],
    "no-use-before-define": [
      "error",
      { functions: true, classes: true, variables: true },
    ],
    "no-var": "error",
    "one-var": ["error", { initialized: "never" }],
    "prefer-const": "error",
    // mocha
    "mocha/no-exclusive-tests": "error",
    "mocha/handle-done-callback": "error",
    // unicorn
    "unicorn/filename-case": ["error", { case: "kebabCase" }],
    // prettier
    ...(configPrettier.rules as Linter.Config["rules"]),
  },
};

export default config;