# AGENTS.md

## Commands

```sh
# Root (runs both frontend + backend)
bun run dev

# Individual packages
bun run dev:frontend
bun run dev:backend
bun run build:frontend

# Linting (Biome - ESLint was replaced)
bun run lint
bun run lint:fix  # fixes and formats

# Prisma (run from backend)
bun --filter backend prisma:generate  # regenerate client after schema changes
bun --filter backend prisma:migrate    # apply migrations
```

## Architecture

```
apps/frontend/      # React + Vite + TanStack Router/Query
apps/backend/       # Bun + Hono + Prisma
packages/api-contract/  # Shared Zod schemas, types, route definitions
```

**Shared contract pattern:**
1. Update `packages/api-contract` first (schemas/types)
2. Implement handler in `apps/backend`
3. Consume from `apps/frontend` via workspace import `@repo/api-contract`

## Authentication (Better Auth)

The project uses **Better Auth** for session management, replacing the legacy Supabase Auth.

- **Backend Context**: `AppContext` (mapped via `AppEnv`) provides `c.get('user')` and `c.get('session')`.
- **User Roles**: The `User` model includes a `role` field (default: `member`). Use `requireSuperAdmin` middleware for protected admin routes.
- **Session Persistence**: 
  - Backend: Hono CORS must have `credentials: true`.
  - Frontend: `authClient` must have `fetchOptions.credentials: 'include'`.
  - Frontend: Axios instance must have `withCredentials: true`.

## Key Quirks

- **Prisma 7**: Uses `prisma.config.ts`, requires `DATABASE_URL` env var at generate time.
- **Gravatar Fallback**: Users without an `image` get an automatic Gravatar Identicon.
  - Backend: Handled in `user.service.ts` for profile API.
  - Frontend: Handled in `AuthProvider` (`auth.tsx`) for the session state.
- **Zod v4**: Use `.issues` instead of `.errors` for validation errors.
- **TanStack Router**: Routes are code-generated. Use `--filter frontend build` not raw vite build.

## Real-time Updates (SSE)

The project uses **Server-Sent Events (SSE)** for real-time booking updates in the admin panel.

- **Backend**: `apps/backend/src/lib/sse.ts` provides the `sseManager` and SSE endpoint `/api/events/:channel`.
- **Event flow**: When a public booking is created, the handler emits to channel `complex:{complexId}`.
- **Frontend**: `home-page.tsx` connects to the SSE endpoint and invalidates the bookings query on new events.

**Important - Multi-process limitation**: The current SSE implementation works with a single Bun process only. If you deploy with multiple workers (e.g., clustering in Dokploy), events won't be shared across workers. For production with multiple workers, use Redis for pub/sub:
- Install `@hono/node-server` or a Redis client
- Replace `sseManager` with Redis pub/sub
- Or fall back to Socket.io with Redis adapter

## Docker Deployment (Dokploy)

- **Build Context**: `./` (monorepo root)
- **Dockerfile**: `Dockerfile` (in root, not `apps/backend/`)
- **Required args**: `DATABASE_URL`, `VITE_API_BASE_URL`, `BETTER_AUTH_SECRET`, `BETTER_AUTH_URL`
- **bun.lock must be tracked**: It's in `.gitignore` by default - remove it for Docker builds

## Linting

Biome is used (not ESLint). Config in `biome.json`:
- Line width: 100
- Quote style: single
- Semicolons: always
- `noUnusedVariables`: warn

## Environment Variables

**Backend** (`apps/backend/.env`):
- `DATABASE_URL` - PostgreSQL connection (required for Prisma)
- `BETTER_AUTH_SECRET`, `BETTER_AUTH_URL` - Auth core
- `APP_BASE_URL` - Frontend URL for trusted origins
- `CORS_ORIGIN` - Frontend URL for CORS policy
- `GOOGLE_CLIENT_ID`, `GOOGLE_CLIENT_SECRET` - Google OAuth (see below)

**Frontend** (`apps/frontend/.env`):
- `VITE_*` prefix required (Vite embeds these at build time)
- `VITE_API_BASE_URL` - Backend URL (default: http://localhost:3000)

## Google OAuth

To enable login with Google:

1. Create OAuth credentials in Google Cloud Console:
   - Application type: Web application
   - Authorized redirect URI: `{BETTER_AUTH_URL}/api/auth/callback/google`

2. Add env vars to `.env.example`:
   ```
   GOOGLE_CLIENT_ID=your-google-client-id
   GOOGLE_CLIENT_SECRET=your-google-client-secret
   ```

3. The backend configures `socialProviders.google` automatically.

4. Frontend uses `authClient.signIn.social({ provider: 'google', callbackURL: 'http://localhost:5173' })`.