from ldap3 import ALL_ATTRIBUTES, MODIFY_ADD
from phi.ldap.utils import get_response, make_group_dict
from phi.logging import get_logger

log = get_logger(__name__)


def get_group_by_cn(client, cn):
    log.info("Searching groups with common name: {}".format(cn))

    dn = "cn={},ou=Groups,{}".format(cn, client.base_dn)
    log.debug("Search dn: {}".format(dn))

    response_id = client.connection.search(
        dn,
        "(objectclass=groupOfNames)",
        search_scope="SUBTREE",
        attributes=[ALL_ATTRIBUTES],
    )

    response = get_response(client, response_id)

    if not response:
        return None

    if len(response) > 1:
        log.error(
            "Looking for exactly one result but server gave {}. "
            "Taking the first and ignoring the rest.".format(len(response))
        )

    group = make_group_dict(client, response[0])
    return group


def get_all_groups(client):
    log.info("Searching all the groups")
    dn = "ou=Groups,{}".format(client.base_dn)

    log.debug("Search dn: {}".format(dn))

    response_id = client.connection.search(
        dn,
        "(objectclass=groupOfNames)",
        search_scope="SUBTREE",
        attributes=[ALL_ATTRIBUTES],
    )

    response = get_response(client, response_id)
    groups = [make_group_dict(client, entry) for entry in response]
    return groups


def add_group_member(client, group, user):
    group_dn = group["dn"]
    member_dn = user["dn"]
    log.debug("Found adding {} to {}".format(member_dn, group_dn))

    response_id = client.connection.modify(
        group_dn, {"member": [(MODIFY_ADD, [member_dn])]}
    )

    return get_response(client, response_id)