import { dirname } from "path";
import { fileURLToPath } from "url";
import { FlatCompat } from "@eslint/eslintrc";
import eslintPluginImport from "eslint-plugin-import";
import eslintPluginUnused from "eslint-plugin-unused-imports";
import eslintPluginSort from "eslint-plugin-simple-import-sort";

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

const compat = new FlatCompat({
  baseDirectory: __dirname,
});

const eslintConfig = [
  ...compat.extends("next/core-web-vitals", "next/typescript"),

  {
    plugins: {
      import: eslintPluginImport,
      "unused-imports": eslintPluginUnused,
      "simple-import-sort": eslintPluginSort,
    },

    rules: {
      /* неиспользуемые переменные и импорты */
      "@typescript-eslint/no-unused-vars": [
        "error",
        { argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
      ],
      "unused-imports/no-unused-imports": "error",
      "unused-imports/no-unused-vars": [
        "warn",
        {
          vars: "all",
          varsIgnorePattern: "^_",
          args: "after-used",
          argsIgnorePattern: "^_",
        },
      ],

      /* порядок импортов: стили .module.(s)css внизу */
      "simple-import-sort/imports": [
        "error",
        {
          groups: [
            ["^\\u0000"],                 // side-effects
            ["^react", "^next", "^@?\\w"],// пакеты
            ["^@/"],                     // алиасы проекта
            ["^\\.\\.(?!/?$)", "^\\./(?=.*/)", "^\\./?$"], // относительные
            ["^.+\\.module\\.(css|scss)$"],                // модули стилей
          ],
        },
      ],
      "simple-import-sort/exports": "error",
    },
  },
];

export default eslintConfig;