from typing import Dict, List, Any
import pickle
import numpy as np
import pandas as pd
import os

class EndpointHandler:
    def __init__(self, path=""):
        model_path = os.path.join(path, "model.pkl")
        with open(model_path, 'rb') as f:
            self.model = pickle.load(f)

    def __call__(self, data: Dict[str, Any]) -> List[Dict[str, Any]]:
        """
        data args:
            user_id (:obj: `str` or `int`)
            k (:obj: `int`, optional)
        Return:
            A :obj:`list` of :obj:`dict`: will be serialized and returned
        """
        user_id = data.pop("user_id", None)
        k = data.pop("k", 10)  # Default to 10 if not provided

        if user_id is None:
            return [{"error": "user_id is required"}]

        try:
            recommended_books = self.model.predict(user_id, k=k)
            return [{"recommended_books": recommended_books.tolist()}]
        except Exception as e:
            return [{"error": str(e)}]

def load_model(model_path):
    handler = EndpointHandler(model_path)
    return handler