# FastAPI Backend for 活牛采购智能数字化系统

This is a FastAPI implementation of the backend for the 活牛采购智能数字化系统.

## Features
- User authentication with JWT
- Order management
- Payment processing
- Role-based access control
- Database integration with SQLAlchemy
- API documentation with Swagger UI and ReDoc

## Requirements
- Python 3.8+
- FastAPI
- SQLAlchemy
- PyJWT
- Uvicorn

## Installation
1. Create a virtual environment:
   ```bash
   python -m venv venv
   source venv/bin/activate  # On Windows: venv\Scripts\activate
   ```

2. Install dependencies:
   ```bash
   pip install -r requirements.txt
   ```

3. Configure environment variables (see .env.example)

4. Run the application:
   ```bash
   uvicorn app.main:app --reload
   ```

## API Documentation
Once the server is running, you can access:
- Swagger UI: http://localhost:8000/docs
- ReDoc: http://localhost:8000/redoc