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# Copyright (c) 2012 NTT DOCOMO, INC.
# Copyright (c) 2011 University of Southern California / ISI
# 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.
from nova.virt.baremetal import baremetal_states
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class NodeDriver(object):
    
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    def __init__(self, virtapi):
        self.virtapi = virtapi
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    def cache_images(self, context, node, instance, **kwargs):
        raise NotImplementedError()
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    def destroy_images(self, context, node, instance):
        raise NotImplementedError()
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    def activate_bootloader(self, context, node, instance, **kwargs):
        raise NotImplementedError()
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    def deactivate_bootloader(self, context, node, instance):
        raise NotImplementedError()
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    def activate_node(self, context, node, instance):
        """For operations after power on."""
        raise NotImplementedError()
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    def deactivate_node(self, context, node, instance):
        """For operations before power off."""
        raise NotImplementedError()
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    def get_console_output(self, node, instance):
        raise NotImplementedError()
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    def dhcp_options_for_instance(self, instance):
        """Optional override to return the DHCP options to use for instance.
        If no DHCP options are needed, this should not be overridden or None
        should be returned.
        """
        return None
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class PowerManager(object):
    
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    def __init__(self, **kwargs):
        self.state = baremetal_states.DELETED
        pass
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    def activate_node(self):
        self.state = baremetal_states.ACTIVE
        return self.state
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    def reboot_node(self):
        self.state = baremetal_states.ACTIVE
        return self.state
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    def deactivate_node(self):
        self.state = baremetal_states.DELETED
        return self.state
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    def is_power_on(self):
        """Returns True or False according as the node's power state."""
        return True
    # TODO(NTTdocomo): split out console methods to its own class
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    def start_console(self):
        pass
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    def stop_console(self):
        pass