// ESLint flat config (v0.7 P4, D-048) — ONE config at repo root covers all
// TS workspaces; each workspace runs `eslint .` and resolves this file
// upward. Deliberately MINIMAL (the milestone goal is a working lint gate,
// not maximal strictness): js/recommended + typescript-eslint recommended
// (NON type-checked — no project-service, no type-aware rules) + the
// react-hooks CORE rules on React surfaces. Type-aware linting stays out:
// the 5 tsc projects already own that job (pnpm typecheck).
import js from '@eslint/js';
import tseslint from 'typescript-eslint';
import reactHooks from 'eslint-plugin-react-hooks';
import globals from 'globals';

export default tseslint.config(
  // ---- global ignores: build output + generated files only. Source,
  // tests, and stories all stay in scope (stories are display-only but
  // linting them is cheap).
  {
    ignores: [
      '**/node_modules/',
      '**/dist/',
      '**/.next/',
      '**/out/',
      '**/.turbo/',
      '**/coverage/',
      '**/storybook-static/',
      '**/.venv/',
      '**/next-env.d.ts', // generated by `next dev/build`
      'apps/web/css.d.ts', // generated by @tailwindcss/postcss
    ],
  },

  // ---- base: @eslint/js recommended for ALL linted files
  {
    ...js.configs.recommended,
    files: ['**/*.ts', '**/*.tsx', '**/*.mjs', '**/*.cjs'],
  },

  // ---- Node scripts (.mjs/.cjs): build scripts + tooling configs run in
  // Node — they need process/console.
  {
    files: ['**/*.mjs', '**/*.cjs'],
    languageOptions: {
      globals: { ...globals.node },
    },
  },

  // ---- TypeScript: recommended, non type-checked (fast — no program needed)
  {
    files: ['**/*.ts', '**/*.tsx'],
    extends: [tseslint.configs.recommended],
    languageOptions: {
      globals: { ...globals.node },
    },
  },

  // ---- React hooks: the CORE rules (rules-of-hooks, exhaustive-deps) on
  // web + ui, ts AND tsx (hook files like use-sandbox-session.ts live in
  // .ts). eslint-plugin-react-hooks v7's `recommended` preset additionally
  // bundles the React-Compiler-era rules (purity, immutability,
  // set-state-in-effect, ...) which fire on shipped components; this gate
  // intentionally takes only the two core rules — the milestone goal is a
  // working lint gate, not maximal strictness (D-048).
  {
    files: [
      'apps/web/**/*.ts',
      'apps/web/**/*.tsx',
      'packages/ui/**/*.ts',
      'packages/ui/**/*.tsx',
    ],
    plugins: { 'react-hooks': reactHooks },
    rules: {
      'react-hooks/rules-of-hooks': 'error',
      'react-hooks/exhaustive-deps': 'warn',
    },
    languageOptions: {
      globals: { ...globals.browser, ...globals.node },
    },
  },
);