# Copyright 2009-2013 Eucalyptus Systems, Inc.
#
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# with or without modification, are permitted provided that the following
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from euca2ools.commands.euare import EuareRequest
from euca2ools.commands.euare.getaccountpolicy import GetAccountPolicy
from requestbuilder import Arg
from requestbuilder.response import PaginatedResponse


class ListAccountPolicies(EuareRequest):
    DESCRIPTION = ('[Eucalyptus only] List one specific policy or all '
                   'policies attached to an account. If no policies are '
                   'attached to the account, the action still succeeds.')
    ARGS = [Arg('-a', '--account-name', dest='AccountName', metavar='ACCOUNT',
                required=True, help='account owning the policies to list'),
            Arg('-p', '--policy-name', metavar='POLICY', route_to=None,
                help='display a specific policy'),
            Arg('-v', '--verbose', action='store_true', route_to=None,
                help='''display the contents of the resulting policies (in
                        addition to their names)'''),
            Arg('--pretty-print', action='store_true', route_to=None,
                help='''when printing the contents of policies, reformat them
                        for easier reading''')]
    LIST_TAGS = ['PolicyNames']

    def main(self):
        return PaginatedResponse(self, (None,), ('PolicyNames',))

    def prepare_for_page(self, page):
        # Pages are defined by markers
        self.params['Marker'] = page

    def get_next_page(self, response):
        if response.get('IsTruncated') == 'true':
            return response['Marker']

    def print_result(self, result):
        if self.args.get('policy_name'):
            # Look for the specific policy the user asked for
            for policy_name in result.get('PolicyNames', []):
                if policy_name == self.args['policy_name']:
                    if self.args['verbose']:
                        self.print_policy(policy_name)
                    else:
                        print policy_name
                    break
        else:
            for policy_name in result.get('PolicyNames', []):
                print policy_name
                if self.args['verbose']:
                    self.print_policy(policy_name)

    def print_policy(self, policy_name):
        req = GetAccountPolicy(service=self.service,
            AccountName=self.args['AccountName'], PolicyName=policy_name,
            pretty_print=self.args['pretty_print'])
        response = req.main()
        req.print_result(response)
