ai-cli-edit

# Code Refactoring Report

## Original Code
```python
def calculate_discount(price, discount_rate):
    if discount_rate > 0:
        return price * (1 - discount_rate)
    else:
        return price
```

## Refactored Code
```python
def apply_discount(price: float, discount_rate: float) -> float:
    """
    Apply a discount to the given price.

    Args:
        price: The original price.
        discount_rate: The discount rate (0 <= discount_rate <= 1).

    Returns:
        The discounted price.
    """
    return price * (1 - discount_rate) if discount_rate > 0 else price
```

## Improvements
- **Type Hints**: Added type hints for better code clarity and IDE support.
- **Docstring**: Included a detailed docstring explaining the function's purpose and parameters.
- **Simplified Logic**: Simplified the conditional logic into a single line for better readability.
- **Naming**: Renamed the function to better reflect its purpose.

## Recommendations
- Consider adding input validation to ensure `discount_rate` is within the valid range (0 <= discount_rate <= 1).
- Unit tests should be updated to reflect the new function signature.