// @ts-check
import tseslint from "@typescript-eslint/eslint-plugin";
import tsParser from "@typescript-eslint/parser";
import importPlugin from "eslint-plugin-import";
import { fileURLToPath } from "node:url";
import { dirname, join } from "node:path";

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

/** @type {import('eslint').Linter.Config[]} */
export default [
  {
    ignores: ["dist/**", "node_modules/**", "coverage/**"],
  },
  {
    files: ["src/**/*.ts", "test/**/*.ts"],
    plugins: {
      "@typescript-eslint": tseslint,
      import: importPlugin,
    },
    languageOptions: {
      parser: tsParser,
      parserOptions: {
        project: "./tsconfig.test.json",
        tsconfigRootDir: __dirname,
        ecmaVersion: 2022,
        sourceType: "module",
      },
    },
    settings: {
      "import/resolver": {
        typescript: {
          project: join(__dirname, "tsconfig.test.json"),
        },
      },
    },
    rules: {
      // TypeScript strict promise rules — critical in a TCP server
      "@typescript-eslint/no-floating-promises": "error",
      "@typescript-eslint/no-misused-promises": "error",

      // General quality
      "@typescript-eslint/no-explicit-any": "error",
      "@typescript-eslint/no-unused-vars": [
        "error",
        { argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
      ],
      "@typescript-eslint/consistent-type-imports": [
        "error",
        { prefer: "type-imports" },
      ],

      // Adapter isolation: core/ must NEVER import from adapters/
      "import/no-restricted-paths": [
        "error",
        {
          basePath: __dirname,
          zones: [
            {
              target: "src/core",
              from: "src/adapters",
              message:
                "src/core must not import from src/adapters — adapters depend on core, not the reverse.",
            },
          ],
        },
      ],
    },
  },
];