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# GoodGo Platform AI
Vietnam's intelligent real estate platform — property search, AI-powered valuation, and end-to-end transaction management.
## Tech Stack
| Layer | Technology |
|-------|-----------|
| **Backend** | NestJS 11, TypeScript, Prisma ORM, CQRS |
| **Frontend** | Next.js 14, React 18, Tailwind CSS, Zustand |
| **Database** | PostgreSQL 16 + PostGIS 3.4 |
| **Search** | Typesense 27 |
| **Cache/Queue** | Redis 7 |
| **AI/ML** | FastAPI, XGBoost, Claude API, Underthesea |
| **MCP** | Model Context Protocol servers (property search, valuation, analytics) |
| **Storage** | MinIO (S3-compatible) |
| **Monitoring** | Prometheus + Grafana |
| **Payments** | VNPay, MoMo, ZaloPay |
## Architecture Overview
```
┌─────────────┐ ┌──────────────┐ ┌──────────────────┐
│ Next.js 14 │────▶│ NestJS API │────▶│ PostgreSQL + │
│ (Web App) │ │ (REST) │ │ PostGIS │
└─────────────┘ └──────┬───────┘ └──────────────────┘
│
┌────────────┼────────────┐
│ │ │
┌─────▼──┐ ┌──────▼───┐ ┌────▼─────┐
│ Redis │ │Typesense │ │ MinIO │
│ Cache │ │ Search │ │ Storage │
└────────┘ └──────────┘ └──────────┘
│
┌─────▼──────────────────────────┐
│ MCP Servers │
│ ├─ Property Search │
│ ├─ Market Analytics │
│ └─ Valuation │
└─────────────┬─────────────────┘
│
┌───────▼────────┐
│ AI Services │
│ (FastAPI) │
│ ├─ AVM │
│ └─ Moderation │
└────────────────┘
```
## Monorepo Structure
```
goodgo-platform-ai/
├── apps/
│ ├── api/ # NestJS backend (port 3000)
│ └── web/ # Next.js frontend (port 3001)
├── libs/
│ ├── ai-services/ # Python FastAPI — AVM + content moderation
│ └── mcp-servers/ # MCP server implementations
├── prisma/ # Database schema & migrations
├── e2e/ # Playwright E2E tests
├── monitoring/ # Prometheus & Grafana configs
└── docs/ # Developer documentation
```
## Quick Start
### Prerequisites
- **Docker Engine 24+** & Docker Compose v2
- **Node.js 22 LTS**
- **pnpm 10.27+** (`corepack enable && corepack prepare pnpm@latest --activate`)
### Setup
```bash
# 1. Clone the repository
git clone <repo-url> && cd goodgo-platform-ai
# 2. Copy environment file
cp .env.example .env
# 3. Start infrastructure services
docker compose up -d
# 4. Verify services are healthy
docker compose ps
# 5. Install dependencies
pnpm install
# 6. Generate Prisma client
pnpm db:generate
# 7. Run database migrations
pnpm db:migrate:dev
# 8. Seed the database (optional)
pnpm db:seed
# 9. Start all apps in dev mode
pnpm dev
```
The API will be available at `http://localhost:3000` and the web app at `http://localhost:3001`.
### Infrastructure Services
| Service | Port(s) | Dashboard |
|---------|---------|-----------|
| PostgreSQL + PostGIS | 5432 | — |
| Redis | 6379 | — |
| Typesense | 8108 | `http://localhost:8108/health` |
| MinIO | 9000 / 9001 | `http://localhost:9001` (console) |
| AI Services (FastAPI) | 8000 | `http://localhost:8000/health` |
| Prometheus | 9090 | `http://localhost:9090` |
| Grafana | 3002 | `http://localhost:3002` |
## Development
### Common Commands
```bash
pnpm dev # Start all apps (API + Web)
pnpm build # Build all packages
pnpm lint # Run ESLint
pnpm typecheck # TypeScript type checking
pnpm format # Format with Prettier
pnpm test # Run unit/integration tests
```
### Database
```bash
pnpm db:generate # Regenerate Prisma client
pnpm db:migrate:dev # Create and apply migrations
pnpm db:migrate:deploy # Apply migrations (CI/production)
pnpm db:seed # Seed database
pnpm db:studio # Open Prisma Studio (visual editor)
pnpm db:reset # Reset database (destructive)
```
### E2E Testing
```bash
pnpm test:e2e # Run all E2E tests
pnpm test:e2e:api # API tests only
pnpm test:e2e:web # Web UI tests only
pnpm test:e2e:report # Open HTML test report
```
## API Modules
| Module | Description |
|--------|-------------|
| **auth** | Registration, login, JWT + refresh token rotation, OAuth (Google/Zalo), KYC |
| **listings** | Property listing CRUD, status workflow, media management |
| **search** | Typesense full-text search with geo-spatial filters |
| **payments** | VNPay, MoMo, ZaloPay integration |
| **subscriptions** | Plan management, usage tracking |
| **notifications** | Email and in-app notifications |
| **admin** | Listing moderation, user management |
| **analytics** | Market reports, price indices, AVM integration |
| **mcp** | MCP server bridge (property search, valuation, analytics) |
| **metrics** | Prometheus metrics endpoint |
Each module follows Domain-Driven Design with `presentation/`, `application/`, `domain/`, and `infrastructure/` layers.
## Documentation
- [Development Environment](docs/dev-environment.md) — Docker setup and local services
- [Architecture](docs/architecture.md) — System design, data flow, module structure
- [Deployment](docs/deployment.md) — Production deployment guide
## License
Proprietary — All rights reserved.

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# Architecture
## System Overview
GoodGo Platform AI is a monorepo containing a NestJS backend, Next.js frontend, Python AI services, and MCP (Model Context Protocol) servers. The system is orchestrated with Turborepo and pnpm workspaces.
```
┌──────────────────────────────────────────┐
│ Client (Browser) │
└──────────────────┬───────────────────────┘
│
┌──────────────────▼───────────────────────┐
│ Next.js 14 (apps/web) │
│ ┌─────────┐ ┌──────────┐ ┌───────┐ │
│ │ Pages │ │Components│ │Zustand │ │
│ │(App │ │(UI + │ │(State) │ │
│ │ Router) │ │ Domain) │ │ │ │
│ └─────────┘ └──────────┘ └───────┘ │
└──────────────────┬───────────────────────┘
│ REST API
┌──────────────────▼───────────────────────┐
│ NestJS 11 (apps/api) │
│ │
│ ┌────────┐ ┌────────┐ ┌─────────────┐ │
│ │ Auth │ │Listings│ │ Payments │ │
│ ├────────┤ ├────────┤ ├─────────────┤ │
│ │ Search │ │ Admin │ │Subscriptions│ │
│ ├────────┤ ├────────┤ ├─────────────┤ │
│ │Analytics│ │ MCP │ │Notifications│ │
│ └────────┘ └────────┘ └─────────────┘ │
└───┬─────┬──────┬─────────┬──────────────┘
│ │ │ │
┌────────────▼┐ ┌─▼────┐ ▼ ┌───▼──────────┐
│ PostgreSQL │ │Redis │ │ │ Typesense │
│ + PostGIS │ │ │ │ │ (Search) │
└─────────────┘ └──────┘ │ └──────────────┘
│
┌───────────────▼──────────────────────┐
│ MCP Servers (libs/mcp-servers) │
│ ┌──────────┐┌──────────┐┌────────┐ │
│ │ Property ││ Market ││Valua- │ │
│ │ Search ││Analytics ││tion │ │
│ └──────────┘└──────────┘└───┬────┘ │
└──────────────────────────────┼───────┘
│
┌──────────────────────────────▼───────┐
│ AI Services (libs/ai-services) │
│ FastAPI + XGBoost + Claude API │
│ ┌──────────┐ ┌────────────────┐ │
│ │ AVM │ │ Moderation │ │
│ │(Pricing) │ │ (Claude API) │ │
│ └──────────┘ └────────────────┘ │
└──────────────────────────────────────┘
```
## Module Architecture
Each API module follows a layered Domain-Driven Design structure:
```
modules/{module-name}/
├── presentation/ # HTTP layer
│ ├── controllers/ # Route handlers
│ └── dtos/ # Request/response DTOs (class-validator)
├── application/ # Business orchestration
│ ├── commands/ # Write operations (CQRS)
│ ├── queries/ # Read operations (CQRS)
│ ├── handlers/ # Command/query handlers
│ └── services/ # Application services
├── domain/ # Core business logic
│ ├── entities/ # Domain entities & value objects
│ ├── repositories/ # Repository interfaces (abstractions)
│ └── events/ # Domain events
├── infrastructure/ # External integrations
│ ├── repositories/ # Prisma repository implementations
│ └── services/ # External service adapters
└── {module-name}.module.ts # NestJS module definition
```
### CQRS Pattern
The platform uses NestJS CQRS (`@nestjs/cqrs`) for complex operations:
- **Commands** — mutate state (create listing, process payment, register user)
- **Queries** — read state (search properties, get analytics)
- **Events** — cross-module communication (listing published → index in Typesense, payment completed → send notification)
### Shared Module
The `shared/` module provides cross-cutting concerns:
- **Prisma service** — database connection and client
- **Redis service** — caching and session management
- **Guards** — JWT auth guard, roles guard, throttle guard
- **Pipes** — global validation pipe (whitelist mode)
- **Filters** — exception filters for consistent error responses
- **Decorators** — `@CurrentUser()`, `@Roles()`, `@Public()`
## Data Flow
### Property Listing Lifecycle
```
DRAFT → PENDING_REVIEW → ACTIVE → RESERVED → SOLD/RENTED
│ │
▼ │
REJECTED EXPIRED
```
1. **Seller/Agent** creates listing (status: `DRAFT`)
2. **Seller** submits for review → `PENDING_REVIEW`
3. **Admin** moderates (AI moderation score assists) → `ACTIVE` or `REJECTED`
4. Active listings are indexed in Typesense for search
5. **Buyer** makes inquiry → `Inquiry` record created
6. Transaction workflow: `OFFER_MADE → DEPOSIT_PAID → CONTRACT_SIGNING → COMPLETED`
### Search Flow
```
User Query → NestJS Search Module → Typesense
│
├─ Full-text on title/description
├─ Faceted filters (price, type, bedrooms)
└─ Geo-spatial (lat/long + radius)
```
### Payment Flow
```
User → API (create payment) → Provider (VNPay/MoMo/ZaloPay)
│
[User pays on provider page]
│
Provider callback → API → Verify signature → Update Payment status
│
SUCCESS / FAILED
```
### AI Valuation Flow
```
API Request → MCP Valuation Server → AI Service (FastAPI)
│
XGBoost Model
│
┌─────▼──────┐
│ Estimated │
│ Price + │
│ Confidence │
│ + Factors │
└─────────────┘
```
## Database Schema
### Core Models
```
User ──┬── Agent (1:1, for AGENT role users)
├── OAuthAccount (1:N, Google/Zalo)
├── RefreshToken (1:N, token families)
├── Subscription (1:N)
├── SavedSearch (1:N)
└── UsageRecord (1:N)
Property ──┬── PropertyMedia (1:N, images/videos)
├── Listing (1:N)
└── Valuation (1:N)
Listing ──┬── Inquiry (1:N)
├── Lead (1:N)
├── Transaction (1:N)
└── Agent (N:1)
Transaction ── Payment (1:N)
Plan ── Subscription (1:N)
MarketIndex (standalone — city/district/month aggregates)
```
### Key Design Decisions
- **PostGIS** for spatial queries — property locations stored as `Point` geometry
- **JSON columns** for flexible data: amenities, nearby POIs, KYC data, subscription features
- **Token family tracking** for secure refresh token rotation (detects reuse attacks)
- **Soft statuses** over soft deletes — listings use status workflow, not `deletedAt`
## MCP Servers
Three Model Context Protocol servers provide AI tool interfaces:
| Server | Tools | Data Source |
|--------|-------|-------------|
| **Property Search** | `search_properties`, `compare_properties`, `get_property_details` | Typesense |
| **Market Analytics** | `get_market_report`, `analyze_trends`, `get_price_indices` | PostgreSQL |
| **Valuation** | `estimate_valuation`, `extract_features`, `compare_valuations` | AI Services (FastAPI) |
MCP servers are registered via `McpModule` in NestJS, managed by `McpRegistryService`, and exposed through `McpTransportController` over HTTP.
## AI Services
Python FastAPI microservice (`libs/ai-services/`) provides:
| Endpoint | Model | Purpose |
|----------|-------|---------|
| `POST /avm/estimate` | XGBoost | Property price estimation with confidence score |
| `POST /moderation/check` | Claude API | Content moderation for listing descriptions |
| `GET /health` | — | Health check |
- **Underthesea** handles Vietnamese text tokenization and NLP preprocessing
- XGBoost model uses engineered features (area, location, property type, amenities)
## Security
- **JWT + Refresh Token Rotation** — 15-minute access tokens, 7-day refresh tokens with family-based rotation
- **OAuth** — Google and Zalo social login
- **Rate Limiting** — 60 req/60s default, 10 req/60s for auth endpoints
- **Helmet** — HTTP security headers
- **CORS** — Configurable origins via `CORS_ORIGINS`
- **Input Validation** — class-validator (backend), Zod (frontend)
- **Content Sanitization** — sanitize-html for user-generated content
- **KYC** — Agent verification workflow (NONE → PENDING → VERIFIED/REJECTED)
## Monitoring
- **Prometheus** scrapes `/metrics` endpoint every 15 seconds
- **Grafana** dashboards auto-provisioned from `monitoring/grafana/dashboards/`
- **Pino** structured JSON logging with configurable log levels
- Metrics include HTTP request duration, error rates, and custom business metrics
## Event System
The platform uses `@nestjs/event-emitter` for loose coupling between modules:
- `listing.published` → Typesense indexer updates search index
- `payment.completed` → Notification service sends confirmation
- `inquiry.created` → Agent notification triggered
- `user.registered` → Welcome email sent

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# Deployment Guide
## Overview
GoodGo Platform AI consists of four deployable services:
| Service | Technology | Default Port |
|---------|-----------|-------------|
| **API** | NestJS (Node.js) | 3000 |
| **Web** | Next.js | 3001 |
| **AI Services** | FastAPI (Python) | 8000 |
| **Infrastructure** | Docker Compose | Various |
## Prerequisites
- Docker Engine 24+ & Docker Compose v2
- Node.js 22 LTS
- pnpm 10.27+
- Python 3.12 (for AI services, if running outside Docker)
## Environment Configuration
Copy `.env.example` to `.env` and configure all required values:
```bash
cp .env.example .env
```
### Required Variables
| Variable | Description | Example |
|----------|-------------|---------|
| `DATABASE_URL` | PostgreSQL connection string | `postgresql://user:pass@host:5432/goodgo` |
| `JWT_SECRET` | JWT signing key (min 32 chars) | Generate with `openssl rand -hex 32` |
| `JWT_REFRESH_SECRET` | Refresh token signing key | Generate with `openssl rand -hex 32` |
| `REDIS_URL` | Redis connection string | `redis://localhost:6379` |
| `TYPESENSE_API_KEY` | Typesense admin API key | Generate a secure random key |
### Optional Variables
| Variable | Description | Default |
|----------|-------------|---------|
| `API_PORT` | API server port | `3000` |
| `WEB_PORT` | Web app port | `3001` |
| `NODE_ENV` | Environment mode | `development` |
| `CORS_ORIGINS` | Allowed CORS origins | — |
| `CLAUDE_API_KEY` | Claude API key (for content moderation) | — |
| `NEXT_PUBLIC_MAPBOX_TOKEN` | Mapbox token (for maps) | — |
| `VNPAY_*`, `MOMO_*`, `ZALOPAY_*` | Payment gateway credentials | — |
## Infrastructure Setup (Docker Compose)
Start all infrastructure services:
```bash
docker compose up -d
```
This starts:
- **PostgreSQL 16 + PostGIS 3.4** (port 5432)
- **Redis 7** (port 6379)
- **Typesense 27** (port 8108)
- **MinIO** (API: 9000, Console: 9001)
- **AI Services** (port 8000)
- **Prometheus** (port 9090)
- **Grafana** (port 3002)
Verify all services are healthy:
```bash
docker compose ps
```
All services include health checks. Wait until all show `healthy` status.
## Database Setup
```bash
# Generate Prisma client
pnpm db:generate
# Apply migrations
pnpm db:migrate:deploy
# Seed initial data (optional)
pnpm db:seed
```
## Building for Production
### API (NestJS)
```bash
cd apps/api
pnpm build
```
Output: `apps/api/dist/`
Run in production:
```bash
NODE_ENV=production node apps/api/dist/main.js
```
### Web (Next.js)
```bash
cd apps/web
pnpm build
```
Output: `apps/web/.next/`
Run in production:
```bash
NODE_ENV=production pnpm --filter web start
```
### AI Services (FastAPI)
The AI service runs in Docker via `docker compose`. To build separately:
```bash
cd libs/ai-services
docker build -t goodgo-ai-services .
docker run -p 8000:8000 --env-file ../../.env goodgo-ai-services
```
## Production Checklist
### Security
- [ ] Set strong, unique `JWT_SECRET` and `JWT_REFRESH_SECRET` (min 32 characters)
- [ ] Set `NODE_ENV=production`
- [ ] Configure `CORS_ORIGINS` to only allow your domain(s)
- [ ] Change default database passwords
- [ ] Change default MinIO credentials (`MINIO_USER`, `MINIO_PASSWORD`)
- [ ] Change default Grafana credentials (`GRAFANA_ADMIN_USER`, `GRAFANA_ADMIN_PASSWORD`)
- [ ] Use a strong, unique `TYPESENSE_API_KEY`
- [ ] Enable SSL/TLS termination (reverse proxy)
- [ ] Set `MINIO_USE_SSL=true` if MinIO is exposed publicly
### Database
- [ ] Run `pnpm db:migrate:deploy` (not `db:migrate:dev`)
- [ ] Enable PostgreSQL connection pooling (PgBouncer recommended)
- [ ] Configure automated backups
- [ ] Set appropriate `max_connections` in PostgreSQL config
### Monitoring
- [ ] Verify Prometheus is scraping `/metrics` endpoint
- [ ] Import Grafana dashboards from `monitoring/grafana/dashboards/`
- [ ] Set up alerting rules for error rates and latency
### Performance
- [ ] Configure Redis `maxmemory` and eviction policy
- [ ] Set appropriate Typesense `--memory-limit`
- [ ] Enable gzip/brotli compression in reverse proxy
- [ ] Configure CDN for static assets (Next.js `/_next/static/`)
## Health Checks
| Service | Endpoint | Expected Response |
|---------|----------|-------------------|
| API | `GET /metrics` | Prometheus metrics |
| AI Services | `GET /health` | `{"status": "ok"}` |
| Typesense | `GET /health` | `{"ok": true}` |
| Redis | `redis-cli ping` | `PONG` |
| PostgreSQL | `pg_isready -h host -p 5432` | Exit code 0 |
## Scaling Considerations
### Horizontal Scaling
- **API**: Stateless — scale with multiple instances behind a load balancer
- **Web**: Stateless — scale with multiple instances or deploy to Vercel/Cloudflare
- **AI Services**: CPU-bound — scale based on valuation request volume
- **Redis**: Use Redis Cluster for high availability
- **PostgreSQL**: Read replicas for query-heavy workloads
### Recommended Architecture (Production)
```
┌─────────────┐
│ Load Balancer│
│ (nginx/ALB) │
└──────┬──────┘
│
┌────────────┼────────────┐
│ │ │
┌─────▼──┐ ┌─────▼──┐ ┌─────▼──┐
│ API #1 │ │ API #2 │ │ API #N │
└────────┘ └────────┘ └────────┘
│ │ │
└────────────┼────────────┘
│
┌────────────┼────────────┐
│ │ │
┌─────▼──┐ ┌─────▼──┐ ┌─────▼─────┐
│ PG │ │ Redis │ │ Typesense │
│Primary │ │Cluster │ │ Cluster │
│+ Replica│ │ │ │ │
└────────┘ └────────┘ └────────────┘
```
## Rollback
### Application Rollback
Deploy the previous container image or build artifact. The API and Web are stateless — no rollback-specific steps needed.
### Database Rollback
Prisma does not support automatic down migrations. If a migration must be reverted:
1. Identify the migration in `prisma/migrations/`
2. Write a manual SQL rollback script
3. Apply via `psql` or a migration tool
4. Update `_prisma_migrations` table
Always test migrations against a staging database before production deployment.

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## Prerequisites ## Prerequisites
- Docker Engine 24+ & Docker Compose v2 - **Docker Engine 24+** & Docker Compose v2
- Node.js 22 LTS (for running app services locally) - **Node.js 22 LTS**
- **pnpm 10.27+** — install via `corepack enable && corepack prepare pnpm@latest --activate`
## Quick Start ## Quick Start
@@ -16,19 +17,41 @@ docker compose up -d
# 3. Verify all services are healthy # 3. Verify all services are healthy
docker compose ps docker compose ps
# 4. Install dependencies
pnpm install
# 5. Generate Prisma client
pnpm db:generate
# 6. Run database migrations
pnpm db:migrate:dev
# 7. Seed the database (optional)
pnpm db:seed
# 8. Start API and Web in dev mode
pnpm dev
``` ```
## Services API runs at `http://localhost:3000`, Web at `http://localhost:3001`.
| Service | Port(s) | Description | Dashboard/UI | ## Infrastructure Services
| ---------- | ----------- | ---------------------------- | ------------------------------- |
| PostgreSQL | 5432 | Database with PostGIS | — | | Service | Port(s) | Description | Dashboard/UI |
| Redis | 6379 | Cache, sessions, queue | — | |---------|---------|-------------|--------------|
| Typesense | 8108 | Full-text search engine | http://localhost:8108/health | | PostgreSQL + PostGIS | 5432 | Database with spatial queries | — |
| MinIO | 9000 / 9001 | S3-compatible object storage | http://localhost:9001 (console) | | Redis | 6379 | Cache, sessions, queue | — |
| Typesense | 8108 | Full-text search engine | `http://localhost:8108/health` |
| MinIO | 9000 / 9001 | S3-compatible object storage | `http://localhost:9001` (console) |
| AI Services | 8000 | FastAPI — AVM + moderation | `http://localhost:8000/health` |
| Prometheus | 9090 | Metrics collection | `http://localhost:9090` |
| Grafana | 3002 | Dashboards & monitoring | `http://localhost:3002` |
## Common Commands ## Common Commands
### Docker Compose
```bash ```bash
# Start services # Start services
docker compose up -d docker compose up -d
@@ -50,6 +73,36 @@ docker compose restart redis
docker compose ps docker compose ps
``` ```
### Development
```bash
pnpm dev # Start all apps in watch mode
pnpm build # Build all packages
pnpm lint # ESLint across monorepo
pnpm typecheck # TypeScript type checking
pnpm format # Prettier formatting
pnpm test # Run unit/integration tests
```
### Database
```bash
pnpm db:generate # Regenerate Prisma client
pnpm db:migrate:dev # Create and apply migrations
pnpm db:seed # Seed database
pnpm db:studio # Open Prisma Studio (visual editor)
pnpm db:reset # Reset database (destructive)
```
### E2E Testing
```bash
pnpm test:e2e # Run all E2E tests
pnpm test:e2e:api # API tests only
pnpm test:e2e:web # Web UI tests only
pnpm test:e2e:report # Open HTML test report
```
## Connecting to Services ## Connecting to Services
### PostgreSQL ### PostgreSQL
@@ -76,11 +129,25 @@ curl http://localhost:8108/health
### MinIO ### MinIO
- API: `http://localhost:9000` - **API**: `http://localhost:9000`
- Console: `http://localhost:9001` (login: minioadmin / minioadmin_secret) - **Console**: `http://localhost:9001` (login: `minioadmin` / `minioadmin_secret`)
### AI Services
```bash
curl http://localhost:8000/health
```
### Grafana
- **URL**: `http://localhost:3002`
- **Login**: `admin` / `admin` (default, configurable via `.env`)
## Troubleshooting ## Troubleshooting
- **Port conflict**: Change ports in `.env` (e.g., `DB_PORT=5433`) - **Port conflict** — Change ports in `.env` (e.g., `DB_PORT=5433`)
- **Permission issues**: Run `docker compose down -v` and restart - **Permission issues** — Run `docker compose down -v` and restart
- **PostGIS not available**: Ensure using `postgis/postgis:16-3.4` image - **PostGIS not available** — Ensure using `postgis/postgis:16-3.4` image
- **Prisma client out of date** — Run `pnpm db:generate` after pulling schema changes
- **AI service not starting** — Check `docker compose logs ai-services` for Python dependency errors
- **Typesense unhealthy** — Verify `TYPESENSE_API_KEY` matches in `.env` and Docker config