"""
.. module: lemur.policies.service
    :platform: Unix
    :copyright: (c) 2017 by Netflix Inc., see AUTHORS for more
    :license: Apache, see LICENSE for more details.
.. moduleauthor:: Kevin Glisson <kglisson@netflix.com>
"""
from lemur import database
from lemur.policies.models import RotationPolicy


def get(policy_id):
    """
    Retrieves policy by its ID.
    :param policy_id:
    :return:
    """
    return database.get(RotationPolicy, policy_id)


def delete(policy_id):
    """
    Delete a rotation policy.
    :param policy_id:
    :return:
    """
    database.delete(get(policy_id))


def get_all_policies():
    """
    Retrieves all rotation policies.
    :return:
    """
    return RotationPolicy.query.all()


def create(**kwargs):
    """
    Creates a new rotation policy.

    :param kwargs:
    :return:
    """
    policy = RotationPolicy(**kwargs)
    database.create(policy)
    return policy


def update(policy_id, **kwargs):
    """
    Updates a policy.
    :param policy_id:
    :param kwargs:
    :return:
    """
    policy = get(policy_id)

    for key, value in kwargs.items():
        setattr(policy, key, value)

    return database.update(policy)