"""
Module for generating reports about engineered features.
"""

import json
from typing import Any, Dict, List

import pandas as pd


class FeatureReport:
    """
    Class for generating comprehensive reports about engineered features.

    Parameters
    ----------
    feature_specs : List[Dict[str, Any]]
        Specifications of generated features
    """

    def __init__(self, feature_specs: List[Dict[str, Any]]):
        self.feature_specs = feature_specs

    def generate_summary(self) -> Dict[str, Any]:
        """
        Generate a summary of the engineered features.

        Returns
        -------
        Dict[str, Any]
            Dictionary containing feature summary statistics
        """
        summary = {
            "total_features": len(self.feature_specs),
            "feature_types": self._count_feature_types(),
            "complexity_stats": self._analyze_complexity(),
        }
        return summary

    def to_json(self) -> str:
        """
        Convert the report to JSON format.

        Returns
        -------
        str
            JSON string containing the report
        """
        return json.dumps(self.generate_summary(), indent=2)

    def to_dataframe(self) -> pd.DataFrame:
        """
        Convert the feature specifications to a DataFrame.

        Returns
        -------
        pd.DataFrame
            DataFrame containing feature specifications
        """
        return pd.DataFrame(self.feature_specs)

    def _count_feature_types(self) -> Dict[str, int]:
        """Count the number of features of each type."""
        type_counts = {}
        for spec in self.feature_specs:
            feat_type = spec.get("type", "unknown")
            type_counts[feat_type] = type_counts.get(feat_type, 0) + 1
        return type_counts

    def _analyze_complexity(self) -> Dict[str, Any]:
        """Analyze the complexity of the engineered features."""
        complexities = []
        for spec in self.feature_specs:  # pylint: disable=unused-variable
            # TODO: Implement complexity analysis
            complexities.append(1)  # Placeholder

        return {
            "min_complexity": min(complexities) if complexities else 0,
            "max_complexity": max(complexities) if complexities else 0,
            "avg_complexity": (
                sum(complexities) / len(complexities) if complexities else 0
            ),
        }
