/** Shared ESLint base for the NestJS services (`auth-service`, `api-gateway`
 * today). Legacy `.eslintrc` format, not flat config — matches
 * `apps/web/.eslintrc.json`'s ESLint 8 era rather than introducing a second
 * config format into the repo.
 *
 * Consuming package.json needs its own `eslint`, `@typescript-eslint/parser`,
 * `@typescript-eslint/eslint-plugin` devDependencies — pnpm's non-hoisted
 * node_modules means a shared config can't lend its own plugin resolution to
 * a package that doesn't declare the plugin itself.
 *
 * Referenced from each service's `.eslintrc.json` as a relative file path
 * (`"extends": "../../packages/config/eslint-preset/index.js"`), not as
 * `"@duoc-thu/config/eslint-preset"` — tried that first, and ESLint 8's
 * legacy shareable-config resolution only auto-resolves package names
 * shaped like `eslint-config-*` / `@scope/eslint-config[-*]`, not an
 * arbitrary subpath of an arbitrarily-named package. Confirmed live: the
 * package-name form failed with "couldn't find the config", the relative
 * path did not. */
module.exports = {
  root: true,
  parser: "@typescript-eslint/parser",
  plugins: ["@typescript-eslint"],
  extends: ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
  env: { node: true, jest: true },
  parserOptions: { sourceType: "module", ecmaVersion: 2022 },
  rules: {
    // NestJS constructor-injection params are conventionally unused by name
    // (e.g. `constructor(private readonly foo: Foo)`); flag genuinely unused
    // locals/imports without flagging that idiom.
    "@typescript-eslint/no-unused-vars": ["warn", { argsIgnorePattern: "^_" }],
    "@typescript-eslint/no-explicit-any": "warn",
  },
  ignorePatterns: ["dist", "node_modules"],
};