.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: 'tsconfig.json',
    tsconfigRootDir: __dirname,
    sourceType: 'module',
  },
  plugins: ['@typescript-eslint/eslint-plugin', 'prettier'],
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/recommended',
    'plugin:@typescript-eslint/recommended-requiring-type-checking',
    'plugin:prettier/recommended',
  ],
  root: true,
  env: {
    node: true,
    jest: true,
  },
  ignorePatterns: ['.eslintrc.js', 'dist/**'],
  rules: {
    // General Rules
    'prettier/prettier': ['error', { singleQuote: true, trailingComma: 'all' }],
    'no-console': ['warn', { allow: ['warn', 'error'] }],

    // TypeScript-Specific Rules
    '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
    '@typescript-eslint/no-explicit-any': 'warn',
    '@typescript-eslint/no-floating-promises': 'error',

    // Enforce Return Types for All Functions
    '@typescript-eslint/explicit-function-return-type': 'error',

    // NestJS-Specific Rules
    '@typescript-eslint/interface-name-prefix': 'off',
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/ban-ts-comment': 'warn',
    '@typescript-eslint/no-non-null-assertion': 'off',

    overrides: [
      {
        files: ['*.spec.ts', '*.test.ts'],
        rules: {
          '@typescript-eslint/no-floating-promises': 'off',
        },
      },
    ],
  },
};