"""
Simple script to load the Misery Index Dataset using pandas or datasets library.
"""

import pandas as pd
from typing import Dict, List, Optional

def load_misery_dataset(file_path: str = "Misery_Data.csv") -> pd.DataFrame:
    """
    Load the Misery Index Dataset from CSV file.
    
    Args:
        file_path: Path to the CSV file (default: "Misery_Data.csv")
        
    Returns:
        pandas.DataFrame with cleaned column names and proper data types
    """
    df = pd.read_csv(file_path)
    
    # Rename columns to be more user-friendly
    column_mapping = {
        "Ep #": "episode",
        "Misery": "scenario", 
        "Score": "misery_score",
        "VNTO": "vnto",
        "Reward": "reward",
        "Win": "win",
        "Comments": "comments",
        "question_tag": "question_tag",
        "level": "level"
    }
    
    df = df.rename(columns=column_mapping)
    
    # Convert misery_score to numeric
    df["misery_score"] = pd.to_numeric(df["misery_score"], errors="coerce")
    
    # Convert reward to numeric, handling empty values
    df["reward"] = pd.to_numeric(df["reward"], errors="coerce").fillna(0).astype(int)
    
    # Clean up string columns
    string_columns = ["episode", "scenario", "vnto", "win", "comments", "question_tag", "level"]
    for col in string_columns:
        if col in df.columns:
            df[col] = df[col].astype(str).str.strip()
            df[col] = df[col].replace("nan", "")
    
    return df

def get_dataset_statistics(df: pd.DataFrame) -> Dict:
    """
    Get basic statistics about the dataset.
    
    Args:
        df: DataFrame containing the dataset
        
    Returns:
        Dictionary with dataset statistics
    """
    stats = {
        "total_samples": len(df),
        "mean_misery": df["misery_score"].mean(),
        "std_misery": df["misery_score"].std(),
        "min_misery": df["misery_score"].min(),
        "max_misery": df["misery_score"].max(),
        "percentiles": {
            "25th": df["misery_score"].quantile(0.25),
            "50th": df["misery_score"].quantile(0.50),
            "75th": df["misery_score"].quantile(0.75),
        },
        "vnto_types": df["vnto"].value_counts().to_dict() if "vnto" in df.columns else {},
        "episodes": df["episode"].nunique(),
        "question_tags": df["question_tag"].value_counts().to_dict() if "question_tag" in df.columns else {},
    }
    return stats

def filter_by_vnto(df: pd.DataFrame, vnto_type: str) -> pd.DataFrame:
    """
    Filter dataset by VNTO type.
    
    Args:
        df: DataFrame containing the dataset
        vnto_type: VNTO type to filter by (T, V, N, O, P)
        
    Returns:
        Filtered DataFrame
    """
    return df[df["vnto"] == vnto_type].copy()

def filter_by_misery_range(df: pd.DataFrame, min_score: float = 0, max_score: float = 100) -> pd.DataFrame:
    """
    Filter dataset by misery score range.
    
    Args:
        df: DataFrame containing the dataset
        min_score: Minimum misery score (inclusive)
        max_score: Maximum misery score (inclusive)
        
    Returns:
        Filtered DataFrame
    """
    return df[(df["misery_score"] >= min_score) & (df["misery_score"] <= max_score)].copy()

def get_sample_scenarios(df: pd.DataFrame, vnto_type: Optional[str] = None, n: int = 5) -> List[Dict]:
    """
    Get sample scenarios from the dataset.
    
    Args:
        df: DataFrame containing the dataset
        vnto_type: Optional VNTO type to filter by
        n: Number of samples to return
        
    Returns:
        List of dictionaries with scenario information
    """
    if vnto_type:
        df_filtered = filter_by_vnto(df, vnto_type)
    else:
        df_filtered = df
    
    samples = df_filtered.sample(n=min(n, len(df_filtered)))
    
    return [
        {
            "scenario": row["scenario"],
            "misery_score": row["misery_score"],
            "vnto": row["vnto"],
            "episode": row["episode"]
        }
        for _, row in samples.iterrows()
    ]

def main():
    """Example usage of the dataset loading functions."""
    
    # Load the dataset
    print("Loading Misery Index Dataset...")
    df = load_misery_dataset()
    
    # Get basic statistics
    stats = get_dataset_statistics(df)
    print(f"\nDataset Statistics:")
    print(f"Total samples: {stats['total_samples']}")
    print(f"Mean misery score: {stats['mean_misery']:.2f}")
    print(f"Standard deviation: {stats['std_misery']:.2f}")
    print(f"Score range: {stats['min_misery']}-{stats['max_misery']}")
    print(f"Number of episodes: {stats['episodes']}")
    
    print(f"\nPercentiles:")
    for p, value in stats['percentiles'].items():
        print(f"  {p}: {value:.2f}")
    
    print(f"\nVNTO Types distribution:")
    for vnto_type, count in stats['vnto_types'].items():
        percentage = (count / stats['total_samples']) * 100
        print(f"  {vnto_type}: {count} ({percentage:.1f}%)")
    
    print(f"\nTop Question Tags:")
    for tag, count in list(stats['question_tags'].items())[:5]:
        percentage = (count / stats['total_samples']) * 100
        print(f"  {tag}: {count} ({percentage:.1f}%)")
    
    # Show some examples
    print(f"\nSample low misery scenarios (< 30):")
    low_misery = filter_by_misery_range(df, 0, 30)
    samples = get_sample_scenarios(low_misery, n=3)
    for sample in samples:
        print(f"  Score {sample['misery_score']}: {sample['scenario']}")
    
    print(f"\nSample high misery scenarios (> 80):")
    high_misery = filter_by_misery_range(df, 80, 100)
    samples = get_sample_scenarios(high_misery, n=3)
    for sample in samples:
        print(f"  Score {sample['misery_score']}: {sample['scenario']}")
    
    print(f"\nSample Video scenarios (VNTO=V):")
    video_scenarios = filter_by_vnto(df, "V")
    samples = get_sample_scenarios(video_scenarios, n=3)
    for sample in samples:
        print(f"  Score {sample['misery_score']}: {sample['scenario']}")

if __name__ == "__main__":
    main()