// ESLint flat config — enforces shared/engine dependency boundary.

import js from "@eslint/js";
import tseslint from "typescript-eslint";
import boundaries from "eslint-plugin-boundaries";
import importPlugin from "eslint-plugin-import";
import globals from "globals";

export default tseslint.config(
  {
    ignores: ["dist/", "node_modules/", "coverage/", "**/*.d.ts"],
  },
  js.configs.recommended,
  ...tseslint.configs.recommended,
  {
    files: ["src/**/*.{ts,tsx}"],
    languageOptions: {
      ecmaVersion: 2022,
      sourceType: "module",
      globals: { ...globals.node },
    },
    plugins: {
      boundaries,
      import: importPlugin,
    },
    settings: {
      "import/resolver": {
        typescript: { project: "./tsconfig.json" },
      },
      "boundaries/elements": [
        { type: "shared", pattern: "src/shared/**" },
        { type: "engine", pattern: "src/engine/**" },
      ],
    },
    rules: {
      "boundaries/element-types": [
        2,
        {
          default: "disallow",
          rules: [
            { from: "shared", allow: [] },
            { from: "engine", allow: ["shared"] },
          ],
        },
      ],
    },
  },
);