# Copyright 2018 99cloud, Inc.
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import logging

from sushy import exceptions
from sushy.resources import base
from sushy.resources import common
from sushy import utils

from rsd_lib.resources.v2_1.fabric import port
from rsd_lib import utils as rsd_lib_utils

LOG = logging.getLogger(__name__)


class StatusField(base.CompositeField):
    state = base.Field('State')
    health = base.Field('Health')
    health_rollup = base.Field('HealthRollUp')


class LinksField(base.CompositeField):
    chassis = base.Field("Chassis", adapter=utils.get_members_identities)


class ActionsField(base.CompositeField):
    reset = common.ResetActionField('#Switch.Reset')
    """The actions switch reset"""


class Switch(base.ResourceBase):
    identity = base.Field('Id')
    """The switch identity"""

    name = base.Field('Name')
    """The switch name"""

    description = base.Field('Description')
    """The switch description"""

    switch_type = base.Field('SwitchType')
    """The switch type"""

    status = StatusField('Status')
    """The switch status"""

    manufacturer = base.Field('Manufacturer')
    """The switch manufacturer name"""

    model = base.Field('Model')
    """The switch model"""

    sku = base.Field("SKU")
    """The switch SKU"""

    serial_number = base.Field('SerialNumber')
    """The switch serial number"""

    part_number = base.Field('PartNumber')
    """The switch part number"""

    asset_tag = base.Field('AssetTag')
    """The switch custom asset tag"""

    domain_id = base.Field('DomainID')
    """The switch domain id"""

    is_managed = base.Field('IsManaged')
    """The switch managed state"""

    total_switch_width = base.Field('TotalSwitchWidth',
                                    adapter=rsd_lib_utils.num_or_none)
    """The switch total switch width"""

    indicator_led = base.Field('IndicatorLED')
    """The switch indicator led"""

    power_state = base.Field('PowerState')
    """The switch power state"""

    links = LinksField("Links")
    """The switch links"""

    actions = ActionsField("Actions")
    """The switch actions"""

    def __init__(self, connector, identity, redfish_version=None):
        """A class representing a Switch

        :param connector: A Connector instance
        :param identity: The identity of the Switch resource
        :param redfish_version: The version of RedFish. Used to construct
            the object according to schema of the given version.
        """
        super(Switch, self).__init__(connector, identity,
                                     redfish_version)

    def _get_reset_action_element(self):
        reset_action = self.actions.reset
        if not reset_action:
            raise exceptions.MissingActionError(action='#Switch.Reset',
                                                resource=self._path)
        return reset_action

    def get_allowed_reset_switch_values(self):
        """Get the allowed values for resetting the switch.

        :returns: A set with the allowed values.
        """
        reset_action = self._get_reset_action_element()

        return reset_action.allowed_values

    def reset_switch(self, value):
        """Reset the switch.

        :param value: The target value.
        :raises: InvalidParameterValueError, if the target value is not
            allowed.
        """
        valid_resets = self.get_allowed_reset_switch_values()
        if value not in valid_resets:
            raise exceptions.InvalidParameterValueError(
                parameter='value', value=value, valid_values=valid_resets)

        target_uri = self._get_reset_action_element().target_uri

        self._conn.post(target_uri, data={'ResetType': value})

    def _get_ports_path(self):
        """Helper function to find the network protocol path"""
        return utils.get_sub_resource_path_by(self, 'Ports')

    @property
    @utils.cache_it
    def ports(self):
        """Property to provide reference to ` Ports` instance

        It is calculated once when it is queried for the first time. On
        refresh, this property is reset.
        """
        return port.PortCollection(
            self._conn, self._get_ports_path(),
            redfish_version=self.redfish_version)


class SwitchCollection(base.ResourceCollectionBase):

    @property
    def _resource_type(self):
        return Switch

    def __init__(self, connector, path, redfish_version=None):
        """A class representing an Endpoint

        :param connector: A Connector instance
        :param path: The canonical path to the Switch collection resource
        :param redfish_version: The version of RedFish. Used to construct
            the object according to schema of the given version.
        """
        super(SwitchCollection, self).__init__(connector, path,
                                               redfish_version)