# CLAUDE.md - GoHorse Jobs

## Project Overview

GoHorse Jobs is a B2B SaaS recruitment platform connecting companies with candidates. It is structured as a monorepo with multiple services sharing a single PostgreSQL database.

**Business model**: Freemium (Free / Pro R$199/month / Enterprise custom pricing).

## Repository Structure

```
gohorsejobs/
├── backend/              # Go 1.24 REST API (Clean Architecture + DDD)
├── frontend/             # Next.js 15 web application (App Router)
├── backoffice/           # NestJS 11 admin/worker API (Fastify adapter)
├── seeder-api/           # Node.js Express database seeder
├── job-scraper-multisite/# Job scraping service
├── ass-email/            # Email assistant service
├── k8s/                  # Kubernetes manifests (dev, hml, prd)
├── docs/                 # Central documentation (API, DB, DevOps, Roadmap)
├── .forgejo/             # Forgejo CI/CD workflows
├── .drone.yml            # Drone CI/CD pipelines (dev/hml/prd)
└── start.sh              # Interactive dev startup script
```

## Tech Stack

| Service | Language | Framework | Key Libraries |
|---------|----------|-----------|---------------|
| Backend | Go 1.24 | stdlib net/http | JWT v5, lib/pq, GORM, Stripe, AWS SDK v2, RabbitMQ, Firebase Admin, Swaggo |
| Frontend | TypeScript 5 | Next.js 15 (App Router) | React 19, Tailwind CSS 4, shadcn/ui (Radix), Zustand, React Hook Form + Zod, Framer Motion, Appwrite, Firebase |
| Backoffice | TypeScript 5 | NestJS 11 (Fastify) | TypeORM, Passport + JWT, Stripe, AMQP, Nodemailer, Pino, Firebase Admin |
| Seeder | JavaScript (ESM) | Express 5 | pg, bcrypt |

**Database**: PostgreSQL 16+ with UUID v7 primary keys. 42 SQL migration files in `backend/migrations/`.

## Quick Start

```bash
./start.sh   # Interactive menu
```

| Option | Action |
|--------|--------|
| 1 | Start Frontend + Backend |
| 2 | Reset DB + Seed + Start |
| 3 | Start all services (Frontend + Backend + Backoffice) |
| 4 | Run migrations only |
| 5 | Seed database (append) |
| 6 | Full DB reset + migrate + seed |
| 7 | Run backend E2E tests |
| 8 | Seed reset LITE (skip 153k cities) |
| 9 | Run all tests (Backend + Frontend) |

### Service Ports

| Service | Port |
|---------|------|
| Backend | 8521 |
| Frontend | 8963 |
| Backoffice | 3001 |
| Swagger (Backend) | 8521/swagger/index.html |
| Swagger (Backoffice) | 3001/api/docs |

## Build & Test Commands

### Backend (Go)

```bash
# Run
cd backend && go run cmd/api/main.go

# Test
go test -v ./... -count=1                         # All unit tests
go test -tags=e2e -v ./tests/e2e/...              # E2E tests

# Swagger generation (requires swag CLI)
swag init -g cmd/api/main.go --parseDependency --parseInternal

# Dependencies
go mod tidy
```

### Frontend (Next.js)

```bash
cd frontend
npm install          # Install deps
npm run dev          # Dev server (default port 3000, use -p 8963 for project convention)
npm run build        # Production build
npm run lint         # ESLint (next lint)
npm run test         # Jest unit tests
```

### Backoffice (NestJS)

```bash
cd backoffice
pnpm install          # Uses pnpm (packageManager: pnpm@9.15.4)
npm run start:dev     # Dev server with watch
npm run build         # Production build (nest build)
npm run lint          # ESLint with auto-fix
npm run format        # Prettier
npm run test          # Jest unit tests
npm run test:cov      # Coverage
npm run test:e2e      # E2E tests
```

### Seeder

```bash
cd seeder-api
npm install
npm run migrate       # Run migrations
npm run seed          # Seed data
npm run seed:reset    # Drop all tables
npm run seed:lite     # Seed without 153k cities
```

## Architecture & Conventions

### Backend (Go) - Clean Architecture + DDD

```
backend/internal/
├── api/              # (legacy) HTTP handlers
├── handlers/         # HTTP request handlers (current)
├── middleware/        # Auth, CORS, rate limiting, security headers, XSS sanitizer
├── core/
│   ├── domain/entity/ # Business entities (User, Company, Job, etc.)
│   ├── ports/         # Repository interfaces
│   └── usecases/      # Business logic (LoginUseCase, RegisterUseCase, etc.)
├── infrastructure/
│   ├── auth/          # JWT service
│   ├── persistence/   # PostgreSQL repository implementations
│   └── storage/       # S3/R2 storage adapter
├── services/          # Business services (Email, FCM, Storage, Admin)
├── dto/               # Data Transfer Objects
├── router/            # Route definitions
├── models/            # GORM models (legacy, being migrated)
├── database/          # DB connection & migration runner
└── utils/             # Utilities (JWT, sanitizer)
```

**Patterns**:
- Constructor injection: `func NewService(db *sql.DB) *Service`
- All DB operations accept `ctx context.Context`
- Error handling: `(T, error)` return tuples
- Repository interfaces in `core/ports/`, implementations in `infrastructure/persistence/`
- Test files: `*_test.go`

### Frontend (Next.js) - App Router

```
frontend/src/
├── app/               # File-based routing (20+ routes)
│   ├── dashboard/     # Protected routes (12+ sub-pages)
│   ├── jobs/          # Job listing & details
│   ├── auth/          # Login, register flows
│   └── ...
├── components/        # Reusable components (44+)
│   └── ui/            # shadcn/ui primitives (24+)
├── hooks/             # Custom React hooks (useAuth, useFetch, etc.)
├── contexts/          # React contexts (auth, theme)
├── lib/               # Utilities (API calls, validation helpers)
└── i18n/              # Internationalization (PT, EN, ES, JA)
```

**Patterns**:
- Server Components by default; use `'use client'` directive for interactivity
- Tailwind CSS utility classes for styling
- Path alias: `@/*` maps to `./src/*`
- Form validation: React Hook Form + Zod schemas
- Global state: Zustand stores
- Real-time features: Appwrite SDK
- Test files: `*.test.tsx`

### Backoffice (NestJS) - Modular

```
backoffice/src/
├── admin/             # Dashboard & statistics
├── auth/              # JWT authentication (Passport)
├── email/             # Email worker (AMQP/LavinMQ consumer)
├── external-services/ # Credential management
├── fcm-tokens/        # Firebase push tokens
├── plans/             # Subscription plans
├── stripe/            # Stripe payment integration
├── tickets/           # Support tickets
├── activity-logs/     # Activity tracking
└── credentials/       # External credentials management
```

**Patterns**:
- NestJS module pattern: `*.module.ts`, `*.controller.ts`, `*.service.ts`, `*.entity.ts`
- Guards for auth: `@UseGuards(JwtAuthGuard)`
- DTOs: `create-*.dto.ts`, `update-*.dto.ts` with class-validator decorators
- Prettier config: single quotes, trailing commas

## Authentication & Authorization

- **JWT**: HS256 with HttpOnly cookies (web) + Bearer tokens (API/mobile)
- **4 roles**: `superadmin` > `admin` > `recruiter` > `candidate`
- **Middleware stack**: Auth (JWT+RBAC) -> CORS -> Rate Limiting (100 req/min) -> Security Headers -> XSS Sanitizer
- **JWT secret must match** between Backend and Backoffice services

## Database

- PostgreSQL 16+ with UUID v7 for primary keys (SERIAL for reference tables)
- Migrations: `backend/migrations/` (42 SQL files, numbered `000_` through `999_`)
- Core tables: `users`, `companies`, `user_companies`, `jobs`, `applications`, `favorite_jobs`, `notifications`, `tickets`, `activity_logs`, `job_payments`
- Relationships: Users belong to companies via `user_companies`; jobs belong to companies; applications link users to jobs

## API Routes

All backend routes under `/api/v1`:
- **Auth**: `/auth/login`, `/auth/register/candidate`, `/auth/register/company`, `/auth/forgot-password`, `/auth/reset-password`
- **Jobs**: CRUD at `/jobs`, moderation at `/jobs/moderation`
- **Companies**: CRUD at `/companies`, status management
- **Users**: `/users/me` (profile), admin CRUD at `/users`
- **Applications**: `/applications` with status updates
- **Storage**: `/storage/upload-url` (presigned S3/R2 URLs)
- **Admin**: `/admin/companies`, `/admin/email-templates`, `/admin/email-settings`
- **Notifications**: `/notifications`, `/tokens` (FCM)
- **Chat**: `/conversations`, `/conversations/{id}/messages`

## External Services

| Service | Purpose |
|---------|---------|
| Stripe | Payment processing & subscriptions |
| Firebase (FCM) | Push notifications |
| Appwrite | Real-time chat/messaging |
| LavinMQ (AMQP) | Message queue for background jobs |
| Cloudflare R2 / S3 | File/image storage |
| Resend | Transactional email |
| cPanel API | Email account management |

## Deployment

- **Environments**: `dev` (branch: dev), `hml` (branch: hml), `prd` (branch: main)
- **CI/CD**: Forgejo workflows (`.forgejo/workflows/deploy.yaml`) + Drone (`.drone.yml`)
- **Container runtime**: Podman (dev), Kubernetes (production)
- **Registry**: Forgejo (`forgejo-gru.rede5.com.br/rede5/`) and Harbor (`in.gohorsejobs.com`)
- **Docker images**: `gohorsejobs-backend`, `gohorsejobs-frontend`, `gohorsejobs-backoffice`, `gohorsejobs-seeder`

## Documentation

Detailed docs are in the `docs/` directory:
- `docs/API.md` - Complete API reference
- `docs/API_SECURITY.md` - Authentication & RBAC details
- `docs/DATABASE.md` - Schema & ERD
- `docs/DEVOPS.md` - Infrastructure & deployment
- `docs/ROADMAP.md` - Product roadmap
- `docs/TASKS.md` - Task tracking

## Key Things to Know

- The backend uses Clean Architecture with DDD; always respect the layer boundaries (handlers -> usecases -> ports/repositories)
- Frontend uses Next.js App Router conventions; new pages go in `src/app/`, shared components in `src/components/`
- The backoffice is a separate NestJS service that shares the same PostgreSQL database as the backend
- Migrations are plain SQL files executed by the seeder-api; they are not managed by an ORM migration tool
- The project supports 4 languages (PT, EN, ES, JA) via i18n message files in `frontend/src/i18n/`
- Environment variables must be configured in `.env` files for each service (backend, frontend, backoffice, seeder-api); these files are gitignored
- The `start.sh` script is the recommended way to run the development environment