"""
  Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.

  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, distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
  INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
  PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  HOLDERS 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.
"""
from cfnlint import CloudFormationLintRule
from cfnlint import RuleMatch


class RefWithPath(CloudFormationLintRule):
    """Check if IAM Policy Version is correct"""
    id = 'E3050'
    shortdesc = 'Check if REFing to a IAM resource with path set'
    description = 'Some resources don\'t support looking up the IAM resource by name. ' \
                  'This check validates when a REF is being used and the Path is not \'/\''
    source_url = 'https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements.html'
    tags = ['properties', 'iam']

    def __init__(self):
        """Init"""
        super(RefWithPath, self).__init__()
        self.resources_and_keys = {
            'AWS::CodeBuild::Project': 'ServiceRole',
        }

        for resource_type in self.resources_and_keys:
            self.resource_property_types.append(resource_type)

    def check_ref(self, value, parameters, resources, path):  # pylint: disable=W0613
        """ Check Ref """
        matches = []

        iam_path = resources.get(value, {}).get('Properties', {}).get('Path')
        if not iam_path:
            return matches

        if iam_path != '/':
            message = 'When using a Ref to IAM resource the Path must be \'/\'.  Switch to GetAtt if the Path has to be \'{}\'.'
            matches.append(
                RuleMatch(path, message.format(iam_path)))

        return matches

    def match_resource_properties(self, properties, resourcetype, path, cfn):
        """Check CloudFormation Properties"""
        matches = []

        key = None
        if resourcetype in self.resources_and_keys:
            key = self.resources_and_keys.get(resourcetype)

        matches.extend(
            cfn.check_value(
                properties, key, path,
                check_ref=self.check_ref
            )
        )

        return matches