import js from '@eslint/js';
import tseslint from 'typescript-eslint';
import reactHooks from 'eslint-plugin-react-hooks';
import globals from 'globals';

// Flat config (ESLint 9). Browser code (src/) gets react-hooks + browser globals;
// everything else (server, shared, e2e, configs, scripts) gets node globals.
export default tseslint.config(
  {
    ignores: ['**/dist/**', '**/node_modules/**', 'server/dist/**'],
  },
  js.configs.recommended,
  ...tseslint.configs.recommended,
  {
    files: ['src/**/*.{ts,tsx}'],
    plugins: { 'react-hooks': reactHooks },
    languageOptions: { globals: { ...globals.browser, ...globals.es2022 } },
    rules: {
      ...reactHooks.configs.recommended.rules,
      // We intentionally pass handler objects to hooks that read them via a ref.
      'react-hooks/exhaustive-deps': 'off',
    },
  },
  {
    files: [
      'server/**/*.ts',
      'shared/**/*.ts',
      'e2e/**/*.ts',
      'vite.config.ts',
      'vitest.config.ts',
      'playwright.config.ts',
      'scripts/**/*.mjs',
      'scripts/**/*.ts',
    ],
    languageOptions: { globals: { ...globals.node, ...globals.es2022 } },
    rules: {
      // Node 22 has fetch/AbortSignal/structuredClone as globals.
      'no-undef': 'off',
    },
  },
);