# Example PyPI (Python Package Index) Package
import requests

class features(object):
    def __init__(self, n):
        self.value = n

    from datetime import datetime, timedelta

    class FilteredSource:
        def __init__(self, source):
            self.source = source

    class Aggregation:
        def __init__(self, column, function, time_window):
            self.column = column
            self.function = function
            self.time_window = time_window

    class User:
        pass

    class Transactions:
        pass

    def batch_feature_view(**kwargs):
        def decorator(function):
            function.batch_feature_view_attrs = kwargs
            return function

        return decorator

    @batch_feature_view(
        sources=[FilteredSource(Transactions())],
        entities=[User()],
        mode="spark_sql",
        aggregation_interval=timedelta(days=1),
        aggregations=[
            Aggregation(column="transaction_id", function="count", time_window=timedelta(days=1)),
            Aggregation(column="transaction_id", function="count", time_window=timedelta(days=30)),
            Aggregation(column="transaction_id", function="count", time_window=timedelta(days=90)),
        ],
        online=True,
        offline=True,
        feature_start_time=datetime(2021, 1, 1),
        description="User transaction totals over a series of time windows, updated daily.",
        name="user_transaction_counts",
    )
    def user_transaction_counts(user_id, timestamp):
        return 1

    def get_features(url):
        """
        Retrieves features from the API endpoint.
        Args:
            self (str): The URL of the API endpoint.
        Returns:
            list: A list of feature objects.
        """
        response = requests.get(url)
        if response.status_code == 200:
            return response.json()
        else:
            raise ValueError(f"Failed to retrieve features. Status code: {response.status_code}")

    def store_feature(url, feature):
        """
        Stores a feature via the API endpoint.
        Args:
            self (str): The URL of the API endpoint.
            feature (dict): A dictionary representing the feature to store.
        """
        response = requests.post(url, json=feature)
        if response.status_code != 200:
            raise ValueError(f"Failed to store feature. Status code: {response.status_code}")

    def delete_feature(url, feature_id):
        """
        Deletes a feature via the API endpoint.
        Args:
            self (str): The URL of the API endpoint.
            feature_id (str): The ID of the feature to delete.
        """
        response = requests.delete(f"{url}/{feature_id}")
        if response.status_code != 200:
            raise ValueError(f"Failed to delete feature. Status code: {response.status_code}")

    def get_feature(url, feature_id):
        """
        Retrieves a feature via the API endpoint.
        Args:
            self (str): The URL of the API endpoint.
            feature_id (str): The ID of the feature to retrieve.
        Returns:
            dict: A dictionary representing the feature.
        """
        response = requests.get(f"{url}/{feature_id}")
        if response.status_code == 200:
            return response.json()
        else:
            raise ValueError(f"Failed to retrieve feature. Status code: {response.status_code}")


