# Copyright 2009-2013 Eucalyptus Systems, Inc.
#
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from euca2ools.commands.ec2 import EC2Request
import os
from requestbuilder import Arg


class CreateKeyPair(EC2Request):
    DESCRIPTION = 'Create a new SSH key pair for use with instances'
    ARGS = [Arg('KeyName', metavar='KEYPAIR',
                help='name of the new key pair (required)'),
            Arg('-f', '--filename', metavar='FILE', route_to=None,
                help='file name to save the private key to')]

    def print_result(self, result):
        print self.tabify(('KEYPAIR', result['keyName'],
                           result['keyFingerprint']))
        if self.args.get('filename'):
            prev_umask = os.umask(0o077)
            with open(self.args['filename'], 'w') as privkeyfile:
                privkeyfile.write(result['keyMaterial'])
            os.umask(prev_umask)
        else:
            print result['keyMaterial']
