import js from '@eslint/js';
import prettier from 'eslint-config-prettier';
import { createTypeScriptImportResolver } from 'eslint-import-resolver-typescript';
import importX from 'eslint-plugin-import-x';
import turbo from 'eslint-plugin-turbo';
import globals from 'globals';
import tseslint from 'typescript-eslint';

/**
 * Base flat config: TypeScript rules + import hygiene + the architectural
 * boundary rules that every package in the workspace must obey.
 *
 * @type {import("eslint").Linter.Config[]}
 */
export const baseConfig = [
  {
    ignores: [
      '**/dist/**',
      '**/build/**',
      '**/.next/**',
      '**/.turbo/**',
      '**/coverage/**',
      '**/node_modules/**',
      '**/generated/**',
    ],
  },
  js.configs.recommended,
  ...tseslint.configs.recommended,
  importX.flatConfigs.recommended,
  importX.flatConfigs.typescript,
  turbo.configs['flat/recommended'],
  {
    languageOptions: {
      ecmaVersion: 2023,
      globals: { ...globals.node, ...globals.es2021 },
    },
    settings: {
      // TypeScript resolver first: it understands `.ts` extensionless imports,
      // path aliases and workspace `exports` maps. The node resolver is the
      // fallback for plain JS config files.
      'import-x/resolver-next': [
        createTypeScriptImportResolver({ alwaysTryTypes: true, project: ['*/tsconfig.json'] }),
        importX.createNodeResolver(),
      ],
    },
    rules: {
      // --- Type safety -------------------------------------------------
      '@typescript-eslint/no-unused-vars': [
        'error',
        { argsIgnorePattern: '^_', varsIgnorePattern: '^_', caughtErrorsIgnorePattern: '^_' },
      ],
      '@typescript-eslint/no-explicit-any': 'error',
      '@typescript-eslint/consistent-type-imports': [
        'error',
        { prefer: 'type-imports', fixStyle: 'inline-type-imports' },
      ],
      // `import type` statements stay with their source group rather than being
      // herded to the bottom of the file, where they lose the context of what
      // they belong to.
      '@typescript-eslint/no-import-type-side-effects': 'error',
      '@typescript-eslint/no-non-null-assertion': 'warn',

      // --- Import hygiene ----------------------------------------------
      'import-x/no-default-export': 'error',
      'import-x/order': [
        'error',
        {
          groups: ['builtin', 'external', 'internal', 'parent', 'sibling', 'index'],
          pathGroups: [{ pattern: '@sport/**', group: 'internal', position: 'before' }],
          pathGroupsExcludedImportTypes: ['type'],
          'newlines-between': 'always',
          alphabetize: { order: 'asc', caseInsensitive: true },
        },
      ],
      'import-x/no-cycle': ['error', { maxDepth: 4 }],

      // --- General ------------------------------------------------------
      eqeqeq: ['error', 'smart'],
      'no-console': ['error', { allow: ['warn', 'error'] }],
      'prefer-const': 'error',
      'object-shorthand': 'error',
    },
  },
  {
    // Config files and scripts are allowed default exports and console output.
    files: ['**/*.config.{js,mjs,ts}', '**/scripts/**', '**/*.cjs'],
    rules: {
      'import-x/no-default-export': 'off',
      'no-console': 'off',
    },
  },
  {
    files: ['**/*.{test,spec}.{ts,tsx}', '**/test/**'],
    rules: {
      '@typescript-eslint/no-explicit-any': 'off',
      'no-console': 'off',
    },
  },
  prettier,
];

export default baseConfig;