import nextCoreWebVitals from 'eslint-config-next/core-web-vitals';
import prettier from 'eslint-config-prettier/flat';

const eslintConfig = [
  ...nextCoreWebVitals,
  prettier,
  {
    rules: {
      '@typescript-eslint/no-explicit-any': 'error',
      '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
      // React Compiler safety rules shipped with eslint-config-next@16 /
      // react-hooks@7. Triage status (2026-05-12 sweep):
      //   purity, set-state-in-render, immutability, refs — promoted
      //   back to error after the existing hits were cleaned up; new
      //   regressions block CI.
      //   set-state-in-effect — left as warn. Many hits are the
      //   useEffect→fetch→setState data-loading pattern that the
      //   Compiler conservatively flags but can't refactor without
      //   moving each call site to TanStack Query. ~50 admin-form
      //   land sites tracked in docs/BACKLOG.md §G.
      //   incompatible-library — informational only ("Compiler
      //   skipped this file because of a non-Compiler-safe import").
      //   No action needed; silenced to keep `pnpm lint` output
      //   actionable.
      'react-hooks/purity': 'error',
      'react-hooks/set-state-in-render': 'error',
      'react-hooks/immutability': 'error',
      'react-hooks/refs': 'error',
      'react-hooks/set-state-in-effect': 'warn',
      'react-hooks/incompatible-library': 'off',
    },
  },
  {
    // Tests assert response shape via expect() — narrowing every
    // `res.json()` to a structural type adds boilerplate without catching
    // bugs. Allow `any` casts at JSON boundaries in test files.
    files: ['tests/**/*.ts', 'tests/**/*.tsx'],
    rules: {
      '@typescript-eslint/no-explicit-any': 'off',
    },
  },
  {
    ignores: ['client-portal/**', 'next-env.d.ts'],
  },
];

export default eslintConfig;