import tseslint from '@typescript-eslint/eslint-plugin';
import tsparser from '@typescript-eslint/parser';
import prettier from 'eslint-config-prettier';

export default [
  {
    files: ['src/**/*.ts'],
    languageOptions: {
      parser: tsparser,
      parserOptions: {
        ecmaVersion: 2020,
        sourceType: 'module',
        project: './tsconfig.json',
      },
    },
    plugins: {
      '@typescript-eslint': tseslint,
    },
    rules: {
      // TypeScript rules - upgraded to errors for stricter type safety
      '@typescript-eslint/no-unused-vars': [
        'error',
        { argsIgnorePattern: '^_', varsIgnorePattern: '^_', caughtErrorsIgnorePattern: '^_' },
      ],
      '@typescript-eslint/no-explicit-any': 'error',
      '@typescript-eslint/explicit-function-return-type': 'off',
      '@typescript-eslint/no-non-null-assertion': 'error',

      // General code quality
      'no-console': 'off', // CLI tool needs console
      'prefer-const': 'error',
      'no-var': 'error',
      'eqeqeq': ['error', 'always'],
    },
  },
  {
    files: ['tests/**/*.js', 'scripts/**/*.js'],
    languageOptions: {
      ecmaVersion: 2020,
      sourceType: 'commonjs',
    },
    rules: {
      'no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
      'prefer-const': 'error',
      'no-var': 'error',
    },
  },
  prettier,
];