import { base } from '../../eslint.config.mjs';
import boundaries from 'eslint-plugin-boundaries';

// Backend architecture layering. The folder-based layers are classified and the
// import direction between them is enforced:
//   routes  → may import plugins, db
//   plugins → may import db
//   db      → leaf (types only)
// (src/app.ts, src/server.ts, src/config.ts are the composition root + leaf
// config — unclassified in Phase 0.) The full per-domain module structure with
// route → service → repository layering is introduced in Phase 1.
export default [
  { ignores: ['dist/**', 'migrations/**'] },
  ...base,
  {
    files: ['src/**/*.ts'],
    plugins: { boundaries },
    settings: {
      'boundaries/include': ['src/**/*'],
      'boundaries/elements': [
        { type: 'plugins', pattern: 'src/plugins/*' },
        { type: 'routes', pattern: 'src/routes/*' },
        { type: 'db', pattern: 'src/db/*' },
      ],
    },
    rules: {
      'boundaries/dependencies': [
        'error',
        {
          default: 'disallow',
          policies: [
            {
              from: { element: { types: 'routes' } },
              allow: { to: { element: { types: { anyOf: ['plugins', 'db'] } } } },
            },
            {
              from: { element: { types: 'plugins' } },
              allow: { to: { element: { types: 'db' } } },
            },
          ],
        },
      ],
    },
  },
];