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# Copyright (c) 2018 Intel Corp. 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.
#

import os

import six

from vnfsdk_pkgtools.packager import toscameta
from vnfsdk_pkgtools import vnfreq


class R66070(vnfreq.TesterBase):
    ID = "R-66070"
    DESC = ("The VNF Package MUST include VNF Identification Data to "
            "uniquely identify the resource for a given VNF provider. "
            "The identification data must include: an identifier for "
            "the VNF, the name of the VNF as was given by the VNF "
            "provider, VNF description, VNF provider, and version.")

    def _do_check(self, reader, tosca):
        if not reader.manifest:
            raise vnfreq.VnfRequirementError("No manifest file found")
        # Existing reader.manifest already means a valid manifest file
        # no futher check needed.
        return 0


class R77707(vnfreq.TesterBase):
    ID = "R-77707"
    DESC = ("The VNF provider MUST include a Manifest File that contains "
            "a list of all the components in the VNF package.")

    def _do_check(self, reader, tosca):
        for root, dirs, files in os.walk(reader.destination):
            for file in files:
                full_path = os.path.join(root, file)
                rel_path = os.path.relpath(full_path, reader.destination)
                if rel_path not in (reader.entry_manifest_file, toscameta.META_FILE):
                    if rel_path not in reader.manifest.digests:
                        raise vnfreq.VnfRequirementError("Package component %s not found in manifest file" % rel_path)
        return 0


class R04298(vnfreq.TesterBase):
    ID = "R-04298"
    DESC = ("The VNF provider MUST provide their testing scripts "
            "to support testing.")

    def _do_check(self, reader, tosca):
        if not reader.entry_tests_dir:
            raise vnfreq.VnfRequirementError("No test directory found")
        elif not os.listdir(os.path.join(reader.destination,
                                         reader.entry_tests_dir)):
            raise vnfreq.VnfRequirementError("No testing scripts found")
        return 0


class R26881(vnfreq.TesterBase):
    ID = "R-26881"
    DESC = ("The VNF provider MUST provide the binaries and images needed "
            "to instantiate the VNF (VNF and VNFC images).")

    def _do_check(self, reader, tosca):
        entry_path = os.path.dirname(os.path.join(reader.destination,
                                                  reader.entry_definitions))
        valid_artifacts = []
        for node in getattr(tosca.tosca, 'nodetemplates', []):
            if tosca.is_type(node, 'tosca.nodes.nfv.Vdu.Compute') or \
               tosca.is_type(node, 'tosca.nodes.nfv.Vdu.VirtualStorage'):
                # TODO(llu) nfv-toscaparser now doesn't support artifacts
                # yet, we have to hack it for now.
                # See https://jira.opnfv.org/browse/PARSER-184.
                for name, props in six.iteritems(node.entity_tpl.get('artifacts', {})):
                    file = props.get('file', None)
                    if file and \
                       os.path.isfile(os.path.join(entry_path, file)) or \
                       os.path.isfile(os.path.join(reader.destination, file)):
                        valid_artifacts.append(file)
        if not valid_artifacts:
            raise vnfreq.VnfRequirementError("No valid binaries or images for VNF instantion found")
        return 0


class R35851(vnfreq.TesterBase):
    ID = "R-35851"
    DESC = ("The VNF Package MUST include VNF topology that describes "
            "basic network and application connectivity internal and "
            "external to the VNF including Link type, KPIs, Bandwidth, "
            "latency, jitter, QoS (if applicable) for each interface.")

    def _do_check(self, reader, tosca):
        # Only check the existence of Cp or VL
        # link type, bandwidth are already enfoced by ONAP onbarding DM
        # other KPIs are not defined yet.
        found = False
        for node in getattr(tosca.tosca, 'nodetemplates', []):
            if tosca.is_type(node, 'tosca.nodes.nfv.VduCp') or \
               tosca.is_type(node, 'tosca.nodes.nfv.VnfVirtualLink'):
                found = True
                break
        if not found:
            raise vnfreq.VnfRequirementError("No basic network or application connectivity found")
        return 0