"""Main module for DeepRehab rules processing."""

class ScoreResult:
    """Represents the result of scoring an exercise."""
    
    def __init__(self, score, reason, details=None):
        """
        Initialize a ScoreResult.
        
        Args:
            score: Numerical score for the exercise
            reason: Explanation for the score
            details: Additional details about the scoring
        """
        self.score = score
        self.reason = reason
        self.details = details or {}


class MovementScorer:
    """Base class for movement scoring."""
    
    def score(self, landmarks):
        """
        Score a movement based on landmarks.
        
        Args:
            landmarks: List of landmark positions
            
        Returns:
            ScoreResult: The scoring result
        """
        raise NotImplementedError("Subclasses must implement the score method")


class DeepRehabRules:
    """A class to manage rehabilitation exercise rules and validation."""
    
    def __init__(self):
        """Initialize the rules engine."""
        pass
    
    def validate_form(self, landmarks, exercise_type):
        """
        Validate the form based on landmarks and exercise type.
        
        Args:
            landmarks: List of landmark positions
            exercise_type: Type of exercise to validate
            
        Returns:
            dict: Validation results
        """
        # TODO: Implement form validation logic
        return {
            "exercise_type": exercise_type,
            "valid": True,
            "feedback": "Form looks good",
            "corrections": []
        }

def load_rules(rule_file=None):
    """
    Load rules from a file or use default rules.
    
    Args:
        rule_file: Path to rule file (optional)
        
    Returns:
        dict: Loaded rules
    """
    # TODO: Implement rule loading logic
    if rule_file:
        # Load custom rules from file
        pass
    else:
        # Return default rules
        return {
            "knee_exercise": {
                "min_angle": 30,
                "max_angle": 120
            },
            "shoulder_exercise": {
                "min_angle": 0,
                "max_angle": 180
            }
        }