# Simple Todo Application

A simple Todo API built with FastAPI and SQLite.

## Features

- Create, Read, Update, and Delete Todo items
- Priority levels (Low, Medium, High) for todo items
- Filter todo items by priority
- SQLite database with SQLAlchemy ORM
- Database migrations with Alembic
- API documentation with Swagger UI and ReDoc
- Health check endpoint

## Project Structure

```
/
├── app/                    # Main application package
│   ├── api/                # API endpoints
│   │   ├── health.py       # Health check endpoint
│   │   ├── schemas.py      # Pydantic models
│   │   └── todos.py        # Todo CRUD endpoints
│   ├── database/           # Database configuration
│   │   └── config.py       # SQLAlchemy setup
│   └── models/             # SQLAlchemy models
│       └── todo.py         # Todo model
├── migrations/             # Alembic migrations
│   └── versions/           # Migration scripts
├── alembic.ini             # Alembic configuration
├── main.py                 # Application entry point
└── requirements.txt        # Python dependencies
```

## API Endpoints

- `GET /api/todos`: Get all todo items (optional query parameter `priority` to filter by priority)
- `POST /api/todos`: Create a new todo item with optional priority level
- `GET /api/todos/{todo_id}`: Get a specific todo item
- `PUT /api/todos/{todo_id}`: Update a todo item (including its priority)
- `DELETE /api/todos/{todo_id}`: Delete a todo item
- `GET /health`: Check application health

## Getting Started

### Prerequisites

- Python 3.8 or higher

### Installation

1. Clone the repository
2. Install dependencies:
   ```
   pip install -r requirements.txt
   ```
3. Run the application:
   ```
   uvicorn main:app --reload
   ```

### API Documentation

Once the application is running, you can access the API documentation at:

- Swagger UI: http://localhost:8000/docs
- ReDoc: http://localhost:8000/redoc

## Database

The application uses SQLite as the database with SQLAlchemy ORM. The database file is stored at `/app/storage/db/db.sqlite`.