# rmtPocketWatcher Setup Guide

## What's Been Created

✅ **Backend Scraper Service**
- Playwright-based scrapers for Eldorado and PlayerAuctions
- Automatic retry logic and error handling
- Scheduled scraping every 5 minutes
- Tracks all seller listings with platform, price, and delivery time

✅ **Database Layer**
- PostgreSQL with Prisma ORM
- Three tables: VendorPrice, PriceIndex, ScrapeLog
- Stores all historical listings for trend analysis
- Indexed for fast queries

✅ **API Layer**
- Fastify REST API with 6 endpoints
- WebSocket for real-time updates
- Filter by seller, platform, date range
- Historical price data

✅ **Docker Setup**
- Docker Compose orchestration
- PostgreSQL container with health checks
- Backend container with auto-migration
- Volume persistence for database

## Current Status

The Docker Compose stack is building. This will:
1. Pull PostgreSQL 16 Alpine image
2. Build the backend Node.js container
3. Install Playwright and dependencies
4. Generate Prisma client
5. Start both services

## Once Build Completes

### Check Status
```bash
# View logs
docker-compose logs -f backend

# Check if services are running
docker ps
```

### Test the API
```bash
# Health check
curl http://localhost:3000/health

# Get latest prices (after first scrape)
curl http://localhost:3000/api/prices/latest

# Get lowest price
curl http://localhost:3000/api/prices/lowest

# Get price history
curl "http://localhost:3000/api/index/history?range=7d"
```

### Monitor Scraping
The backend will automatically:
- Scrape Eldorado and PlayerAuctions every 5 minutes
- Save all listings to the database
- Calculate and store the lowest price
- Log all scrape attempts

Check logs to see scraping activity:
```bash
docker-compose logs -f backend | grep "scraping"
```

## Database Access

### Using Prisma Studio
```bash
cd backend
npm run db:studio
```

### Using psql
```bash
docker exec -it rmtpw-postgres psql -U rmtpw -d rmtpocketwatcher
```

## Stopping and Restarting

```bash
# Stop services
docker-compose down

# Start services
docker-compose up -d

# Rebuild after code changes
docker-compose up --build -d

# View logs
docker-compose logs -f

# Remove everything including data
docker-compose down -v
```

## Environment Variables

Edit `.env` or `docker-compose.yml` to configure:

- `SCRAPE_INTERVAL_MINUTES` - How often to scrape (default: 5)
- `SCRAPER_HEADLESS` - Run browser in headless mode (default: true)
- `PORT` - API server port (default: 3000)
- `DATABASE_URL` - PostgreSQL connection string

## Next Steps

1. **Wait for build to complete** (~2-5 minutes)
2. **Verify services are running**: `docker ps`
3. **Check first scrape**: `docker-compose logs -f backend`
4. **Test API endpoints**: See examples above
5. **Build Electron frontend** (coming next)

## Troubleshooting

### Backend won't start
```bash
# Check logs
docker-compose logs backend

# Restart backend
docker-compose restart backend
```

### Database connection issues
```bash
# Check postgres is healthy
docker-compose ps

# Restart postgres
docker-compose restart postgres
```

### Scraper errors
```bash
# View detailed logs
docker-compose logs -f backend | grep -A 5 "error"

# Check scrape log in database
docker exec -it rmtpw-postgres psql -U rmtpw -d rmtpocketwatcher -c "SELECT * FROM scrape_log ORDER BY timestamp DESC LIMIT 10;"
```

## File Structure

```
rmtPocketWatcher/
├── docker-compose.yml          # Docker orchestration
├── .env                        # Environment variables
├── backend/
│   ├── Dockerfile             # Backend container definition
│   ├── prisma/
│   │   └── schema.prisma      # Database schema
│   ├── src/
│   │   ├── scrapers/          # Scraping logic
│   │   ├── api/               # REST + WebSocket API
│   │   ├── database/          # Prisma client & repository
│   │   └── index.ts           # Main server
│   └── package.json
└── README.md
```