import { defineConfig, globalIgnores } from 'eslint/config';
import nextVitals from 'eslint-config-next/core-web-vitals';

const eslintConfig = defineConfig([
  ...nextVitals,
  globalIgnores([
    '.next/**',
    'node_modules/**',
    'out/**',
    'build/**',
    'next-env.d.ts',
    'scripts/migrations/**',
  ]),
  // The flat config from `eslint-config-next/core-web-vitals` does NOT
  // enable the core `no-undef` rule for plain-JS identifier references
  // — only `react/jsx-no-undef`, which catches undefined JSX components
  // but NOT plain function/variable references like `useFocusTrap(...)`
  // in a hook call. PR #144 (`31da384`) shipped a runtime
  // ReferenceError to production because of this gap; that bug would
  // have been caught at lint time with the rule on. We enable it
  // directly rather than pulling in `@eslint/js/recommended` (which
  // would also turn on `no-unused-vars`, `no-prototype-builtins`, and
  // a handful of others that surface a flood of pre-existing
  // violations and risk derailing this hotfix-class change).
  //
  // Browser + Node globals (window, document, process, Buffer, etc.)
  // are sourced from the language-options block below.
  {
    rules: {
      'no-undef': 'error',
    },
    languageOptions: {
      globals: {
        // Browser
        window: 'readonly',
        document: 'readonly',
        navigator: 'readonly',
        fetch: 'readonly',
        FormData: 'readonly',
        File: 'readonly',
        Blob: 'readonly',
        URL: 'readonly',
        URLSearchParams: 'readonly',
        localStorage: 'readonly',
        sessionStorage: 'readonly',
        location: 'readonly',
        history: 'readonly',
        alert: 'readonly',
        confirm: 'readonly',
        prompt: 'readonly',
        atob: 'readonly',
        btoa: 'readonly',
        crypto: 'readonly',
        WebSocket: 'readonly',
        Image: 'readonly',
        MediaStream: 'readonly',
        MediaStreamTrack: 'readonly',
        ImageCapture: 'readonly',
        MediaRecorder: 'readonly',
        AbortController: 'readonly',
        Event: 'readonly',
        CustomEvent: 'readonly',
        HTMLElement: 'readonly',
        HTMLInputElement: 'readonly',
        HTMLImageElement: 'readonly',
        HTMLVideoElement: 'readonly',
        HTMLCanvasElement: 'readonly',
        Element: 'readonly',
        Node: 'readonly',
        NodeList: 'readonly',
        DOMException: 'readonly',
        IntersectionObserver: 'readonly',
        MutationObserver: 'readonly',
        ResizeObserver: 'readonly',
        requestAnimationFrame: 'readonly',
        cancelAnimationFrame: 'readonly',
        getComputedStyle: 'readonly',
        // Timers (shared between browser + node)
        setTimeout: 'readonly',
        clearTimeout: 'readonly',
        setInterval: 'readonly',
        clearInterval: 'readonly',
        queueMicrotask: 'readonly',
        // Console + globals
        console: 'readonly',
        globalThis: 'readonly',
        // Node / Next.js runtime
        process: 'readonly',
        Buffer: 'readonly',
        __dirname: 'readonly',
        __filename: 'readonly',
        module: 'readonly',
        require: 'readonly',
        exports: 'readonly',
        global: 'readonly',
      },
    },
  },
  {
    files: ['scripts/**/*.js'],
    rules: {
      'no-restricted-syntax': ['error', {
        selector: 'CallExpression[callee.name="require"]',
        message: 'Use ESM `import` syntax. `package.json` has "type": "module"; require() throws ReferenceError at runtime. See .convoys/fix-reset-db-script.md.',
      }],
    },
  },
  // Vitest test files have an additional set of globals (describe, it,
  // expect, vi, beforeEach, etc.). Defining them here keeps the test
  // files from triggering no-undef while leaving the rule strict for
  // source files.
  {
    files: ['test/**/*.js', '**/*.test.js', '**/*.test.ts', 'test/setup.js'],
    languageOptions: {
      globals: {
        describe: 'readonly',
        it: 'readonly',
        test: 'readonly',
        expect: 'readonly',
        vi: 'readonly',
        beforeEach: 'readonly',
        afterEach: 'readonly',
        beforeAll: 'readonly',
        afterAll: 'readonly',
      },
    },
  },
]);

export default eslintConfig;