# Commands Cheatsheet

Quick reference for common commands when working with TurboTrades backend.

## 📦 Installation & Setup

```bash
# Install dependencies
npm install

# Copy environment variables
cp .env.example .env

# Edit environment variables
# Windows: notepad .env
# Mac/Linux: nano .env
```

## 🚀 Running the Server

```bash
# Development mode (auto-reload on file changes)
npm run dev

# Production mode
npm start

# With Node.js built-in watch mode
node --watch index.js
```

## 🗄️ MongoDB Commands

```bash
# Start MongoDB (Windows)
mongod

# Start MongoDB (Mac with Homebrew)
brew services start mongodb-community

# Start MongoDB (Linux systemd)
sudo systemctl start mongod

# Connect to MongoDB shell
mongosh

# Show databases
show dbs

# Use TurboTrades database
use turbotrades

# Show collections
show collections

# Find all users
db.users.find().pretty()

# Count users
db.users.countDocuments()

# Find user by Steam ID
db.users.findOne({ steamId: "76561198012345678" })

# Update user balance
db.users.updateOne(
  { steamId: "76561198012345678" },
  { $set: { balance: 100 } }
)

# Delete all users (be careful!)
db.users.deleteMany({})

# Create index on steamId
db.users.createIndex({ steamId: 1 }, { unique: true })

# Show all indexes
db.users.getIndexes()
```

## 🔧 NPM Commands

```bash
# Install new package
npm install package-name

# Install as dev dependency
npm install -D package-name

# Uninstall package
npm uninstall package-name

# Update all packages
npm update

# Check for outdated packages
npm outdated

# Audit security vulnerabilities
npm audit

# Fix vulnerabilities (if possible)
npm audit fix

# Clean install (delete node_modules and reinstall)
rm -rf node_modules package-lock.json
npm install
```

## 🧪 Testing Commands

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

# Test with formatted JSON (requires jq)
curl http://localhost:3000/health | jq

# Test Steam login (opens browser)
curl http://localhost:3000/auth/steam

# Test authenticated endpoint (replace TOKEN)
curl http://localhost:3000/auth/me \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN"

# Test with cookies
curl http://localhost:3000/auth/me \
  -H "Cookie: accessToken=YOUR_TOKEN"

# Test POST request
curl -X POST http://localhost:3000/auth/logout \
  -H "Cookie: accessToken=YOUR_TOKEN"

# Test PATCH request
curl -X PATCH http://localhost:3000/user/trade-url \
  -H "Content-Type: application/json" \
  -H "Cookie: accessToken=YOUR_TOKEN" \
  -d '{"tradeUrl":"https://steamcommunity.com/tradeoffer/new/?partner=123&token=ABC"}'
```

## 🔌 WebSocket Testing

```bash
# Install wscat globally
npm install -g wscat

# Connect to WebSocket
wscat -c ws://localhost:3000/ws

# Connect with token
wscat -c "ws://localhost:3000/ws?token=YOUR_ACCESS_TOKEN"

# Send ping (after connecting)
{"type":"ping"}

# Send custom message
{"type":"custom","data":{"message":"hello"}}

# Disconnect
Ctrl+C
```

## 🐳 Docker Commands (Future)

```bash
# Build Docker image
docker build -t turbotrades .

# Run container
docker run -d -p 3000:3000 --env-file .env turbotrades

# Run with MongoDB
docker-compose up -d

# Stop containers
docker-compose down

# View logs
docker logs turbotrades

# Shell into container
docker exec -it turbotrades sh

# Remove container
docker rm -f turbotrades

# Remove image
docker rmi turbotrades
```

## 📊 PM2 Process Manager

```bash
# Install PM2 globally
npm install -g pm2

# Start application
pm2 start index.js --name turbotrades

# Start with environment
pm2 start index.js --name turbotrades --env production

# List processes
pm2 list

# Monitor processes
pm2 monit

# View logs
pm2 logs turbotrades

# View specific log lines
pm2 logs turbotrades --lines 100

# Restart application
pm2 restart turbotrades

# Stop application
pm2 stop turbotrades

# Delete from PM2
pm2 delete turbotrades

# Save process list
pm2 save

# Setup auto-start on boot
pm2 startup

# Update PM2
npm install -g pm2@latest
pm2 update
```

## 🔑 Generate Secrets

```bash
# Generate random secret (Node.js)
node -e "console.log(require('crypto').randomBytes(32).toString('hex'))"

# Generate multiple secrets
node -e "for(let i=0;i<3;i++) console.log(require('crypto').randomBytes(32).toString('hex'))"

# Generate base64 secret
node -e "console.log(require('crypto').randomBytes(32).toString('base64'))"

# On Linux/Mac with OpenSSL
openssl rand -hex 32
openssl rand -base64 32
```

## 🔍 Debugging

```bash
# Run with Node.js debugger
node --inspect index.js

# Run with Chrome DevTools
node --inspect-brk index.js
# Then open chrome://inspect in Chrome

# View all environment variables
node -e "console.log(process.env)"

# Check Node.js version
node --version

# Check npm version
npm --version

# Check MongoDB version
mongod --version

# View process on port
# Windows
netstat -ano | findstr :3000

# Mac/Linux
lsof -i :3000

# Kill process on port
# Windows
taskkill /PID <PID> /F

# Mac/Linux
kill -9 <PID>
```

## 📝 Git Commands

```bash
# Initialize git (if not already)
git init

# Check status
git status

# Add all files
git add .

# Commit changes
git commit -m "Your commit message"

# Create new branch
git checkout -b feature/new-feature

# Switch branches
git checkout main

# Push to remote
git push origin main

# Pull latest changes
git pull origin main

# View commit history
git log --oneline

# Undo last commit (keep changes)
git reset --soft HEAD~1

# Stash changes
git stash

# Apply stashed changes
git stash pop
```

## 🧹 Cleanup Commands

```bash
# Clear npm cache
npm cache clean --force

# Remove node_modules
# Windows
rmdir /s /q node_modules

# Mac/Linux
rm -rf node_modules

# Clear MongoDB database
mongosh turbotrades --eval "db.dropDatabase()"

# Clear PM2 logs
pm2 flush

# Clear all PM2 processes
pm2 kill
```

## 📈 Performance & Monitoring

```bash
# Check memory usage
node -e "console.log(process.memoryUsage())"

# Monitor CPU and memory (requires htop)
htop

# Node.js performance profiling
node --prof index.js

# Generate and view flamegraph
node --prof index.js
node --prof-process isolate-*.log > processed.txt

# Check MongoDB performance
mongosh --eval "db.currentOp()"

# MongoDB stats
mongosh turbotrades --eval "db.stats()"
```

## 🌐 Network Commands

```bash
# Check if port is open
# Windows
netstat -an | findstr :3000

# Mac/Linux
nc -zv localhost 3000

# Test WebSocket connection
curl -i -N -H "Connection: Upgrade" \
  -H "Upgrade: websocket" \
  -H "Sec-WebSocket-Version: 13" \
  -H "Sec-WebSocket-Key: test" \
  http://localhost:3000/ws

# Check DNS resolution
nslookup yourdomain.com

# Trace route
traceroute yourdomain.com  # Mac/Linux
tracert yourdomain.com     # Windows
```

## 🔐 SSL/TLS (Production)

```bash
# Generate self-signed certificate (development)
openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes

# Generate Let's Encrypt certificate (production)
sudo certbot certonly --standalone -d yourdomain.com

# Renew Let's Encrypt certificate
sudo certbot renew

# Check certificate expiry
openssl x509 -in cert.pem -text -noout
```

## 💡 Useful One-Liners

```bash
# Count lines of code
find . -name "*.js" -not -path "./node_modules/*" | xargs wc -l

# Find all TODO comments
grep -r "TODO" --exclude-dir=node_modules .

# Find large files
find . -type f -size +1M

# Backup database
mongodump --db turbotrades --out ./backup

# Restore database
mongorestore --db turbotrades ./backup/turbotrades

# Watch files for changes
watch -n 1 "ls -lh ."

# Continuous ping test
ping -c 10 yourdomain.com

# Get public IP
curl ifconfig.me
```

## 🎯 Quick Troubleshooting

```bash
# Server won't start - check if port is in use
lsof -i :3000  # Mac/Linux
netstat -ano | findstr :3000  # Windows

# MongoDB won't connect - check if running
mongosh --eval "db.version()"

# Permission denied - fix with chmod
chmod +x index.js

# EACCES error - don't use sudo, fix npm permissions
mkdir ~/.npm-global
npm config set prefix '~/.npm-global'
export PATH=~/.npm-global/bin:$PATH

# Module not found - reinstall dependencies
rm -rf node_modules package-lock.json
npm install

# Old cached data - clear cache
npm cache clean --force
rm -rf node_modules package-lock.json
npm install
```

## 📚 Documentation Links

- Fastify: https://www.fastify.io/docs/latest/
- MongoDB: https://www.mongodb.com/docs/
- Mongoose: https://mongoosejs.com/docs/
- Steam API: https://developer.valvesoftware.com/wiki/Steam_Web_API
- JWT: https://jwt.io/
- WebSocket: https://developer.mozilla.org/en-US/docs/Web/API/WebSocket

---

**Pro Tip**: Add commonly used commands to shell aliases!

```bash
# Add to ~/.bashrc or ~/.zshrc
alias dev="npm run dev"
alias start-mongo="brew services start mongodb-community"
alias stop-mongo="brew services stop mongodb-community"
alias logs="pm2 logs turbotrades"
```