lemma/app/eslint.config.mjs

import { defineConfig, globalIgnores } from 'eslint/config';
import { fixupConfigRules, fixupPluginRules } from '@eslint/compat';
import react from 'eslint-plugin-react';
import reactHooks from 'eslint-plugin-react-hooks';
import typescriptEslint from '@typescript-eslint/eslint-plugin';
import tsParser from '@typescript-eslint/parser';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import js from '@eslint/js';
import { FlatCompat } from '@eslint/eslintrc';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const compat = new FlatCompat({
  baseDirectory: __dirname,
  recommendedConfig: js.configs.recommended,
  allConfig: js.configs.all,
});

export default defineConfig([
  globalIgnores([
    '**/node_modules',
    '**/dist',
    '**/build',
    '**/coverage',
    '**/public',
    '**/*.js',
    '**/vite.config.ts',
    '**/eslint.config.mjs',
  ]),
  {
    extends: fixupConfigRules(
      compat.extends(
        'eslint:recommended',
        'plugin:react/recommended',
        'plugin:react-hooks/recommended',
        'plugin:@typescript-eslint/recommended',
        'plugin:@typescript-eslint/recommended-requiring-type-checking'
      )
    ),

    plugins: {
      react: fixupPluginRules(react),
      'react-hooks': fixupPluginRules(reactHooks),
      '@typescript-eslint': fixupPluginRules(typescriptEslint),
    },

    languageOptions: {
      parser: tsParser,
      ecmaVersion: 2022,
      sourceType: 'module',

      parserOptions: {
        ecmaFeatures: {
          jsx: true,
        },

        project: './tsconfig.json',
      },
    },

    settings: {
      react: {
        version: 'detect',
      },
    },

    rules: {
      'no-console': [
        'warn',
        {
          allow: ['warn', 'error', 'debug'],
        },
      ],

      'no-duplicate-imports': 'error',
      'no-unused-vars': 'off',
      'react/prop-types': 'off',
      'react/react-in-jsx-scope': 'off',
      'react-hooks/rules-of-hooks': 'error',
      'react-hooks/exhaustive-deps': 'warn',
      '@typescript-eslint/explicit-module-boundary-types': 'off',
      '@typescript-eslint/no-explicit-any': 'warn',

      '@typescript-eslint/no-unused-vars': [
        'warn',
        {
          argsIgnorePattern: '^_',
          varsIgnorePattern: '^_',
          caughtErrorsIgnorePattern: '^_',
        },
      ],

      '@typescript-eslint/consistent-type-imports': [
        'warn',
        {
          prefer: 'type-imports',
        },
      ],

      '@typescript-eslint/no-misused-promises': 'warn',
      '@typescript-eslint/no-floating-promises': 'warn',
      '@typescript-eslint/unbound-method': 'off',
      '@typescript-eslint/no-non-null-assertion': 'warn',
    },
  },
  // Override configuration for test files
  {
    files: ['**/*.test.ts', '**/*.test.tsx'],
    rules: {
      '@typescript-eslint/no-non-null-assertion': 'off',
    },
  },
]);