# Quick Start Guide

## ✅ Backend is Ready!

Your complete Express.js backend with PostgreSQL is now running on **http://localhost:4000**

## 🚀 What's Been Done

1. ✅ **Database Setup**
   - Created 7 tables with proper relationships
   - Added indexes for performance
   - Seeded with sample data

2. ✅ **API Endpoints Working**
   - Parties API: `/api/parties`
   - Mirchi Types API: `/api/mirchi-types`
   - Lots API: `/api/lots`
   - Transactions API: `/api/transactions`

3. ✅ **Sample Data Loaded**
   - 5 Parties (Ramesh Traders, Suresh & Co, etc.)
   - 5 Mirchi Types (Teja, Byadgi, Guntur Sannam, etc.)
   - 3 Active Lots with stock
   - 1 Sample Transaction

## 🔧 Available Commands

```bash
cd backend

# Start server (currently running)
npm start

# Development mode with auto-reload
npm run dev

# Database management
npm run migrate  # Create tables
npm run seed     # Add sample data
npm run reset    # Drop all tables (⚠️ use with caution)
```

## 📡 Test the API

**Health Check:**
```bash
curl http://localhost:4000/health
```

**Get All Parties:**
```bash
curl http://localhost:4000/api/parties
```

**Get All Mirchi Types:**
```bash
curl http://localhost:4000/api/mirchi-types
```

**Get All Transactions:**
```bash
curl http://localhost:4000/api/transactions
```

## 🔗 Connect Frontend

Update your frontend's `db.ts` file:
- The API_BASE is already set to `http://localhost:4000/api`
- All endpoints are ready to use
- No changes needed in frontend code!

## 📊 Database Schema

**Tables:**
1. `parties` - Customer/supplier management
2. `mirchi_types` - Chili pepper varieties
3. `lots` - Inventory with stock tracking
4. `transactions` - Purchase/sales bills
5. `transaction_items` - Line items
6. `expenses` - Transaction expenses
7. `payments` - Payment records

## 🎯 Next Steps

1. Keep the backend server running
2. Start your frontend: `cd frontend && npm run dev`
3. Test the complete application!

## 💡 Features

- ✅ Full CRUD operations for all entities
- ✅ Automatic stock management (lots)
- ✅ Party balance tracking
- ✅ Payment tracking with multiple modes
- ✅ Support for returns (purchase/sales)
- ✅ Transaction filtering by party, type, etc.
- ✅ Proper error handling and validation

## 🐛 Troubleshooting

**Server not starting?**
- Check if port 4000 is available
- Verify PostgreSQL connection in `.env`

**Database errors?**
- Run `npm run reset` then `npm run migrate` and `npm run seed`

**API not responding?**
- Check server logs in terminal
- Verify server is running on port 4000