"""
Management of Dell DRAC

The DRAC module is used to create and manage DRAC cards on Dell servers


Ensure the user damian is present

  .. code-block:: yaml

    damian:
      drac.present:
        - name: damian
        - password: secret
        - permission: login,test_alerts,clear_logs


Ensure the user damian does not exist

  .. code-block:: yaml

    damian:
      drac.absent:
        - name: damian


Ensure DRAC network is in a consistent state

  .. code-block:: yaml

    my_network:
      drac.network:
        - ip: 10.225.108.29
        - netmask: 255.255.255.224
        - gateway: 10.225.108.1

"""

import salt.exceptions
import salt.utils.path


def __virtual__():
    """
    Ensure the racadm command is installed
    """
    if salt.utils.path.which("racadm"):
        return True
    return (False, "racadm command not found")


def present(name, password, permission):
    """
    Ensure the user exists on the Dell DRAC

    name:
        The users username

    password
        The password used to authenticate

    permission
        The permissions that should be assigned to a user
    """
    ret = {"name": name, "result": True, "changes": {}, "comment": ""}

    users = __salt__["drac.list_users"]()

    if __opts__["test"]:
        if name in users:
            ret["comment"] = "`{}` already exists".format(name)
        else:
            ret["comment"] = "`{}` will be created".format(name)
            ret["changes"] = {name: "will be created"}

        return ret

    if name in users:
        ret["comment"] = "`{}` already exists".format(name)
    else:
        if __salt__["drac.create_user"](name, password, permission, users):
            ret["comment"] = "`{}` user created".format(name)
            ret["changes"] = {name: "new user created"}
        else:
            ret["comment"] = "Unable to create user"
            ret["result"] = False

    return ret


def absent(name):
    """
    Ensure a user does not exist on the Dell DRAC

    name:
        The users username
    """
    ret = {"name": name, "result": True, "changes": {}, "comment": ""}

    users = __salt__["drac.list_users"]()

    if __opts__["test"]:
        if name in users:
            ret["comment"] = "`{}` is set to be deleted".format(name)
            ret["changes"] = {name: "will be deleted"}
        else:
            ret["comment"] = "`{}` does not exist".format(name)

        return ret

    if name in users:
        if __salt__["drac.delete_user"](name, users[name]["index"]):
            ret["comment"] = "`{}` deleted".format(name)
            ret["changes"] = {name: "deleted"}
        else:
            ret["comment"] = "Unable to delete user"
            ret["result"] = False
    else:
        ret["comment"] = "`{}` does not exist".format(name)

    return ret


def network(ip, netmask, gateway):
    """
    Ensure the DRAC network settings are consistent
    """
    ret = {"name": ip, "result": True, "changes": {}, "comment": ""}

    current_network = __salt__["drac.network_info"]()
    new_network = {}

    if ip != current_network["IPv4 settings"]["IP Address"]:
        ret["changes"].update(
            {
                "IP Address": {
                    "Old": current_network["IPv4 settings"]["IP Address"],
                    "New": ip,
                }
            }
        )

    if netmask != current_network["IPv4 settings"]["Subnet Mask"]:
        ret["changes"].update(
            {
                "Netmask": {
                    "Old": current_network["IPv4 settings"]["Subnet Mask"],
                    "New": netmask,
                }
            }
        )

    if gateway != current_network["IPv4 settings"]["Gateway"]:
        ret["changes"].update(
            {
                "Gateway": {
                    "Old": current_network["IPv4 settings"]["Gateway"],
                    "New": gateway,
                }
            }
        )

    if __opts__["test"]:
        ret["result"] = None
        return ret

    if __salt__["drac.set_network"](ip, netmask, gateway):
        if not ret["changes"]:
            ret["comment"] = "Network is in the desired state"

        return ret

    ret["result"] = False
    ret["comment"] = "unable to configure network"

    return ret
