# Copyright (c) 2011 Mitch Garnaat http://garnaat.org/
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.

"""
Represents an EC2 Elastic Network Interface
"""
from boto.ec2.ec2object import TaggedEC2Object
from boto.resultset import ResultSet
from boto.ec2.group import Group

class Attachment(object):
    """
    :ivar id: The ID of the attachment.
    :ivar instance_id: The ID of the instance.
    :ivar device_index: The index of this device.
    :ivar status: The status of the device.
    :ivar attach_time: The time the device was attached.
    :ivar delete_on_termination: Whether the device will be deleted
        when the instance is terminated.
    """

    def __init__(self):
        self.id = None
        self.instance_id = None
        self.instance_owner_id = None
        self.device_index = 0
        self.status = None
        self.attach_time = None
        self.delete_on_termination = False
        
    def __repr__(self):
        return 'Attachment:%s' % self.id

    def startElement(self, name, attrs, connection):
        return None
        
    def endElement(self, name, value, connection):
        if name == 'attachmentId':
            self.id = value
        elif name == 'instanceId':
            self.instance_id = value
        elif name == 'instanceOwnerId':
            self.instance_owner_id = value
        elif name == 'status':
            self.status = value
        elif name == 'attachTime':
            self.attach_time = value
        elif name == 'deleteOnTermination':
            if value.lower() == 'true':
                self.delete_on_termination = True
            else:
                self.delete_on_termination = False
        else:
            setattr(self, name, value)

class NetworkInterface(TaggedEC2Object):
    """
    An Elastic Network Interface.

    :ivar id: The ID of the ENI.
    :ivar subnet_id: The ID of the VPC subnet.
    :ivar vpc_id: The ID of the VPC.
    :ivar description: The description.
    :ivar owner_id: The ID of the owner of the ENI.
    :ivar requester_managed: 
    :ivar status: The interface's status (available|in-use).
    :ivar mac_address: The MAC address of the interface.
    :ivar private_ip_address: The IP address of the interface within
        the subnet.
    :ivar source_dest_check: Flag to indicate whether to validate
        network traffic to or from this network interface.
    :ivar groups: List of security groups associated with the interface.
    :ivar attachment: The attachment object.
    """
    
    def __init__(self, connection=None):
        TaggedEC2Object.__init__(self, connection)
        self.id = None
        self.subnet_id = None
        self.vpc_id = None
        self.availability_zone = None
        self.description = None
        self.owner_id = None
        self.requester_managed = False
        self.status = None
        self.mac_address = None
        self.private_ip_address = None
        self.source_dest_check = None
        self.groups = []
        self.attachment = None

    def __repr__(self):
        return 'NetworkInterface:%s' % self.id

    def startElement(self, name, attrs, connection):
        if name == 'groupSet':
            self.groups = ResultSet([('item', Group)])
            return self.groups
        elif name == 'attachment':
            self.attachment = Attachment()
            return self.attachment
        else:
            return None
        
    def endElement(self, name, value, connection):
        if name == 'networkInterfaceId':
            self.id = value
        elif name == 'subnetId':
            self.subnet_id = value
        elif name == 'vpcId':
            self.vpc_id = value
        elif name == 'availabilityZone':
            self.availability_zone = value
        elif name == 'description':
            self.description = value
        elif name == 'ownerId':
            self.owner_id = value
        elif name == 'requesterManaged':
            if value.lower() == 'true':
                self.requester_managed = True
            else:
                self.requester_managed = False
        elif name == 'status':
            self.status = value
        elif name == 'macAddress':
            self.mac_address = value
        elif name == 'privateIpAddress':
            self.private_ip_address = value
        elif name == 'sourceDestCheck':
            if value.lower() == 'true':
                self.source_dest_check = True
            else:
                self.source_dest_check = False
        else:
            setattr(self, name, value)

    def delete(self):
        return self.connection.delete_network_interface(self.id)