"""Create reasoning_engine
Generated by Phi-Octopus Eden
2025-11-07 06:13:45.910656
"""

```python
class ReasoningEngine:
    """
    A simple reasoning engine that can evaluate conditions and make decisions based on predefined rules.

    This engine supports basic logical operations and conditional statements to handle decision-making tasks.
    """

    def __init__(self):
        self.rules = []

    def add_rule(self, condition: callable, action: callable) -> None:
        """
        Adds a rule to the reasoning engine. A rule is defined by a condition function (returning True or False)
        and an action function (to be executed if the condition is met).

        :param condition: Callable that takes input data as argument and returns a boolean.
        :param action: Callable that defines the action to be taken when the condition is true.
        """
        self.rules.append((condition, action))

    def evaluate(self, input_data) -> None:
        """
        Evaluates all rules with the given input data. If a rule's condition function evaluates to True,
        its corresponding action function is executed.

        :param input_data: The input data used to evaluate each rule.
        """
        for condition, action in self.rules:
            if condition(input_data):
                action()

# Example usage
def print_greeting():
    print("Hello, how can I assist you today?")

def handle_sadness(data):
    print(f"Detecting sadness in {data['user_name']}. Respond with empathy.")

engine = ReasoningEngine()
engine.add_rule(lambda data: data.get('mood') == 'happy', print_greeting)
engine.add_rule(lambda data: data.get('mood') == 'sad', handle_sadness)

# Example input data
input_data = {'user_name': 'Alice', 'mood': 'sad'}
engine.evaluate(input_data)
```