#
# Copyright 2015 Hewlett Packard Development Company, LP
# Copyright 2015 Universidade Federal de Campina Grande
#
#    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.

from oneview_client import exceptions


class OneViewObject(object):
    """DO NOT INSTANTIATE. THIS IS AN ABSTRACT CLASS."""

    @classmethod
    def from_json(cls, json):
        instance = cls()
        instance.update_from_json(json)
        return instance

    def update_from_json(self, json):
        for attr_key in self.attribute_map:
            attribute_value = json.get(attr_key)
            setattr(self,
                    self.attribute_map.get(attr_key),
                    attribute_value)


class EnclosureGroup(OneViewObject):
    attribute_map = {
        'uri': 'uri',
        'uuid': 'uuid',
        'name': 'name',
        'enclosureTypeUri': 'enclosure_type_uri',
        'status': 'status',
    }


class Enclosure(OneViewObject):
    attribute_map = {
        'uri': 'uri',
        'enclosureTypeUri': 'enclosure_type_uri',
        'enclosureGroupUri': 'enclosure_group_uri',
        'logicalEnclosureUri': 'logical_enclosure_uri',
        'status': 'status',
    }


class ServerHardwareType(OneViewObject):
    attribute_map = {
        'uri': 'uri',
        'uuid': 'uuid',
        'name': 'name',
    }


class ServerHardware(OneViewObject):
    attribute_map = {
        'uri': 'uri',
        'uuid': 'uuid',
        'name': 'name',
        'powerState': 'power_state',
        'serverProfileUri': 'server_profile_uri',
        'serverHardwareTypeUri': 'server_hardware_type_uri',
        'serverGroupUri': 'enclosure_group_uri',
        'status': 'status',
        'state': 'state',
        'stateReason': 'state_reason',
        'locationUri': 'enclosure_uri',
        'processorCount': 'processor_count',
        'processorCoreCount': 'processor_core_count',
        'memoryMb': 'memory_mb',
        'portMap': 'port_map',
        'mpHostInfo': 'mp_host_info',
    }

    def get_mac(self, nic_index=0):
        if self.port_map:
            try:
                for device in self.port_map.get('deviceSlots'):
                    for physical_port in device.get('physicalPorts'):
                        if physical_port.get('type') == 'Ethernet':
                            sh_physical_port = physical_port
                            break
                for virtual_port in sh_physical_port.get('virtualPorts'):
                    # NOTE(nicodemos): Ironic oneview drivers needs to use a
                    # port that type is Ethernet and function 'a' to be able
                    # to make a deploy.
                    if virtual_port.get('portFunction') == 'a':
                        return virtual_port.get('mac').lower()
            except Exception:
                raise exceptions.OneViewException(
                    "There is no Ethernet port on the Server Hardware: %s"
                    % self.attribute_map.get('uri'))
        else:
            raise exceptions.OneViewException(
                "There is no portMap on the Server Hardware requested. Is "
                "this a DL server?")

    @property
    def cpus(self):
        return (self.processor_count * self.processor_core_count)


class ServerProfileTemplate(OneViewObject):
    attribute_map = {
        'uri': 'uri',
        'uuid': 'uuid',
        'name': 'name',
        'serverHardwareTypeUri': 'server_hardware_type_uri',
        'enclosureGroupUri': 'enclosure_group_uri',
        'connections': 'connections',
        'boot': 'boot',
        'macType': 'mac_type',
    }


class ServerProfile(OneViewObject):
    attribute_map = {
        'uri': 'uri',
        'name': 'name',
        'serverProfileTemplateUri': 'server_profile_template_uri',
        'templateCompliance': 'template_compliance',
        'serverHardwareUri': 'server_hardware_uri',
        'serverHardwareTypeUri': 'server_hardware_type_uri',
        'enclosureGroupUri': 'enclosure_group_uri',
        'enclosureUri': 'enclosure_uri',
        'status': 'status',
        'connections': 'connections',
        'boot': 'boot',
        'sanStorage': 'san_storage',
    }

    def update_from_json(self, json_body):
        """Updates an instance of ServerProfile with values parsed from json

        This method differs from the one in OneViewObject since it adds keys in
        the ServerProfile object for values that aren't on attribute_map. This
        is needed because to send the Server Profile back to OneView, we need
        to preserve state and required fields that aren't exploited by
        python-oneviewclient
        """
        for attr_key in json_body.keys():
            attribute_value = json_body.get(attr_key)
            attribute_map_value = self.attribute_map.get(attr_key)
            if attribute_map_value is not None:
                attr_key = attribute_map_value
            setattr(self, attr_key, attribute_value)

    def to_oneview_dict(self):
        server_profile_dict = {}
        for attr_key in self.__dict__.keys():
            attribute_value = getattr(self, str(attr_key))
            camel_case_key = self._oneview_key_for_attr(self.attribute_map,
                                                        attr_key)
            if camel_case_key is not None:
                attr_key = camel_case_key
            server_profile_dict[attr_key] = attribute_value
        return server_profile_dict

    def _oneview_key_for_attr(self, dictionary, value):
        for k, v in dictionary.items():
            if v == value:
                return k