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# -*- coding: utf8 -*-
# ============LICENSE_START=======================================================
# org.onap.vvp/validation-scripts
# ===================================================================
# Copyright © 2017 AT&T Intellectual Property. All rights reserved.
# ===================================================================
#
# Unless otherwise specified, all software contained herein is licensed
# under the Apache License, Version 2.0 (the “License”);
# you may not use this software 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.
#
#
#
# Unless otherwise specified, all documentation contained herein is licensed
# under the Creative Commons License, Attribution 4.0 Intl. (the “License”);
# you may not use this documentation except in compliance with the License.
# You may obtain a copy of the License at
#
#             https://creativecommons.org/licenses/by/4.0/
#
# Unless required by applicable law or agreed to in writing, documentation
# 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.
#
# ============LICENSE_END============================================
#
# ECOMP is a trademark and service mark of AT&T Intellectual Property.
#

from os import path, listdir
import re
import yaml
import pytest
from .helpers import get_parsed_yml_for_yaml_files, check_basename_ending
from .utils.nested_files import get_list_of_nested_files


def get_template_dir(metafunc):
    '''
    returns template_dir, either as its passed in on CLI
    or, during --self-test, the directory whos name matches
    the current tests module name
    '''
    if metafunc.config.getoption('template_dir') is None:
        return path.join(
            path.dirname(path.realpath(__file__)),
            'fixtures',
            metafunc.function.__module__.split('.')[-1])
    else:
        return metafunc.config.getoption('template_dir')[0]


def get_nested_files(filenames):
    '''
    returns all the nested files for a set of filenames
    '''
    nested_files = []
    for filename in filenames:
        try:
            with open(filename) as fh:
                yml = yaml.load(fh)
            if "resources" not in yml:
                continue
            nested_files.extend(get_list_of_nested_files(
                    yml["resources"], path.dirname(filename)))
        except Exception as e:
            print(e)
            continue
    return nested_files


def list_filenames_in_template_dir(metafunc, extensions, template_type='',
                                   sub_dirs=[]):
    '''
    returns the filenames in a template_dir, either as its passed in
    on CLI or, during --self-test, the directory whos name matches
    the current tests module name
    '''
    template_dir = get_template_dir(metafunc)
    filenames = []

    try:
        if metafunc.config.getoption('self_test'):
            filenames = [path.join(template_dir, s, f)
                         for s in sub_dirs
                         for f in listdir(path.join(template_dir, s))
                         if path.isfile(path.join(template_dir, s, f)) and
                         path.splitext(f)[-1] in extensions and
                         check_basename_ending(template_type,
                                               path.splitext(f)[0])]
        else:
            filenames = [path.join(template_dir, f)
                         for f in listdir(template_dir)
                         if path.isfile(path.join(template_dir, f)) and
                         path.splitext(f)[-1] in extensions and
                         check_basename_ending(template_type,
                                               path.splitext(f)[0])]

    except Exception as e:
        print(e)

    return filenames


def list_template_dir(metafunc, extensions, exclude_nested=True,
                      template_type='', sub_dirs=[]):
    '''
    returns the filenames excluding the nested files for a template_dir,
    either as its passed in on CLI or, during --self-test, the
    directory whos name matches the current tests module name
    '''
    filenames = []
    nested_files = []

    try:
        filenames = list_filenames_in_template_dir(metafunc, extensions,
                                                   template_type, sub_dirs)
        if exclude_nested:
            nested_files = get_nested_files(filenames)
    except Exception as e:
        print(e)

    return list(set(filenames) - set(nested_files))


def get_filenames_list(metafunc, extensions=[".yaml", ".yml", ".env"],
                       exclude_nested=False, template_type=''):
    '''
    returns the filename fixtures for the template dir, either as by how its
    passed in on CLI or, during --self-test, the directory whos name
    matches the current tests module name
    '''
    if metafunc.config.getoption('self_test'):
        filenames_list = list_template_dir(metafunc,
                                           extensions,
                                           exclude_nested,
                                           template_type,
                                           ['pass'])
        filenames_list += [pytest.mark.xfail(f, strict=True)
                           for f in list_template_dir(metafunc,
                                                      extensions,
                                                      exclude_nested,
                                                      template_type,
                                                      ['fail'])]
    else:
        filenames_list = list_template_dir(metafunc,
                                           extensions,
                                           exclude_nested,
                                           template_type)

    return filenames_list


def get_filenames_lists(metafunc, extensions=[".yaml", ".yml", ".env"],
                        exclude_nested=False, template_type=''):
    '''
    returns the list of files in the template dir, either as by how its
    passed in on CLI or, during --self-test, the directory whos name
    matches the current tests module name
    '''
    filenames_lists = []
    if metafunc.config.getoption('self_test'):
        filenames_lists.append(list_template_dir(metafunc,
                                                 extensions,
                                                 exclude_nested,
                                                 template_type,
                                                 ['pass']))
        filenames_lists.append(pytest.mark.xfail(
                            list_template_dir(metafunc,
                                              extensions,
                                              exclude_nested,
                                              template_type,
                                              ['fail']),
                            strict=True))
    else:
        filenames_lists.append(list_template_dir(metafunc,
                                                 extensions,
                                                 exclude_nested,
                                                 template_type))

    return filenames_lists


def get_parsed_yaml_files(metafunc, extensions, exclude_nested=True,
                          template_type='', sections=[]):
    '''
    returns the list of parsed yaml files in the specified template dir,
    either as by how its passed in on CLI or, during --self-test, the
    directory whos name matches the current tests module name
    '''
    extensions = [".yaml", ".yml"]

    if metafunc.config.getoption('self_test'):
        yaml_files = list_template_dir(metafunc, extensions, exclude_nested,
                                       template_type, ['pass'])
        parsed_yml_list = get_parsed_yml_for_yaml_files(yaml_files,
                                                        sections)

        yaml_files = list_template_dir(metafunc, extensions, exclude_nested,
                                       template_type, ['fail'])
        parsed_yml_list = get_parsed_yml_for_yaml_files(yaml_files,
                                                        sections)
        parsed_yml_list += [pytest.mark.xfail(parsed_yml, strict=True)
                            for parsed_yml in parsed_yml_list]
    else:
        yaml_files = list_template_dir(metafunc, extensions)
        parsed_yml_list = get_parsed_yml_for_yaml_files(yaml_files,
                                                        sections)

    return parsed_yml_list


def parametrize_filenames(metafunc):
    '''
    This param runs tests all files in the template dir
    '''
    filenames = get_filenames_lists(metafunc)
    metafunc.parametrize('filenames', filenames)


def parametrize_filename(metafunc):
    '''
    This param runs tests once for every file in the template dir
    '''
    filenames = get_filenames_list(metafunc)
    metafunc.parametrize('filename', filenames)


def parametrize_yaml_files(metafunc):
    '''
    This param runs tests for the yaml files in the template dir
    '''
    yaml_files = get_filenames_lists(metafunc, ['.yaml', '.yml'], False)
    metafunc.parametrize("yaml_files", yaml_files)


def parametrize_yaml_file(metafunc):
    '''
    This param runs tests for every yaml file in the template dir
    '''
    yaml_files = get_filenames_list(metafunc, ['.yaml', '.yml'], False)
    metafunc.parametrize('yaml_file', yaml_files)


def parametrize_templates(metafunc):
    '''
    This param runs tests for the template in the template dir
    '''
    templates = get_filenames_lists(metafunc, ['.yaml', '.yml'], True)
    metafunc.parametrize("templates", templates)


def parametrize_template(metafunc):
    '''
    This param runs tests for every template in the template dir
    '''
    templates = get_filenames_list(metafunc, ['.yaml', '.yml'], True)
    metafunc.parametrize('template', templates)


def parametrize_parsed_yaml_file(metafunc):
    '''
    This param runs tests for a parsed version of each yaml file
    in the template dir
    '''
    parsed_yaml_files = get_parsed_yaml_files(metafunc, ['.yaml', '.yml'],
                                              False)
    metafunc.parametrize('parsed_yaml_file', parsed_yaml_files)


def parametrize_heat_templates(metafunc):
    '''
    This param runs tests for all heat templates in the template dir
    '''
    heat_templates = get_filenames_lists(metafunc, ['.yaml', '.yml'],
                                         True, 'heat')
    metafunc.parametrize('heat_templates', heat_templates)


def parametrize_heat_template(metafunc):
    '''
    This param runs tests for every heat template in the template dir
    '''
    heat_templates = get_filenames_list(metafunc, ['.yaml', '.yml'],
                                        True, 'heat')
    metafunc.parametrize('heat_template', heat_templates)


def parametrize_volume_templates(metafunc):
    '''
    This param runs tests for all volume templates in the template dir
    '''
    volume_templates = get_filenames_lists(metafunc, ['.yaml', '.yml'],
                                           True, 'volume')
    metafunc.parametrize('volume_templates', volume_templates)


def parametrize_volume_template(metafunc):
    '''

    This param runs tests for every volume template in the template dir
    '''
    volume_templates = get_filenames_list(metafunc, ['.yaml', '.yml'],
                                          True, 'volume')
    metafunc.parametrize('volume_template', volume_templates)


def parametrize_environment_files(metafunc):
    '''
    This param runs tests for all environment files in the template dir
    '''
    env_files = get_filenames_lists(metafunc, ['.env'])
    metafunc.parametrize('env_files', env_files)


def parametrize_environment_file(metafunc):
    '''
    This param runs tests for every environment file in the template dir
    '''
    env_files = get_filenames_list(metafunc, ['.env'])
    metafunc.parametrize('env_file', env_files)


def parametrize_parsed_environment_file(metafunc):
    '''
    This param runs tests for every parsed environment file
    in the template dir
    '''
    parsed_env_files = get_parsed_yaml_files(metafunc, ['.env'])
    metafunc.parametrize('parsed_env_file', parsed_env_files)


def parametrize_template_dir(metafunc):
    '''
    This param passes a  the template_dir as passed in on CLI
    or, during --self-test, passes in the sub directories of
    template_dir/pass/ and template_dir/fail
    template_dir = get_template_dir(metafunc)
    '''
    template_dir = get_template_dir(metafunc)

    if metafunc.config.getoption('self_test'):
        dirs = [path.join(template_dir, s, t)
                for s in ['pass']
                for t in listdir(path.join(template_dir, s))
                if path.isdir(path.join(template_dir, s, t))]

        dirs += [pytest.mark.xfail(path.join(template_dir, s, t))
                 for s in ['fail']
                 for t in listdir(path.join(template_dir, s))
                 if path.isdir(path.join(template_dir, s, t))]
    else:
        dirs = [template_dir]

    metafunc.parametrize('template_dir', dirs)


def parametrize_environment_pair(metafunc, template_type=''):
    '''
    Define a list of pairs of parsed yaml from the heat templates and
    environment files
    '''
    pairs = []
    if metafunc.config.getoption('self_test'):
        sub_dirs = ['pass', 'fail']
        env_files = list_template_dir(metafunc, ['.env'], True,
                                      template_type, sub_dirs)
        yaml_files = list_template_dir(metafunc, ['.yaml', '.yml'], True,
                                       template_type, sub_dirs)
    else:
        env_files = list_template_dir(metafunc, ['.env'], True,
                                      template_type)
        yaml_files = list_template_dir(metafunc, ['.yaml', '.yml'],
                                       True, template_type)

    for filename in env_files:
        basename = path.splitext(filename)[0]
        if basename + '.yml' in yaml_files:
            yfilename = basename + '.yml'
        else:
            yfilename = basename + '.yaml'

        try:
            with open(filename) as fh:
                eyml = yaml.load(fh)
            with open(yfilename) as fh:
                yyml = yaml.load(fh)

            if 'fail' in filename:
                pairs.append(pytest.mark.xfail({"name": basename,
                                                "yyml": yyml,
                                                "eyml": eyml},
                             strict=True))
            else:
                pairs.append({"name": basename, "yyml": yyml, "eyml": eyml})

        except Exception as e:
            print(e)

    metafunc.parametrize('environment_pair', pairs)


def parametrize_heat_volume_pair(metafunc):
    '''
    Define a list of pairs of parsed yaml from the a heat and volume
    template
    '''
    pairs = []
    if metafunc.config.getoption('self_test'):
        sub_dirs = ['pass', 'fail']
        volume_files = list_template_dir(metafunc, ['.yaml', '.yml'],
                                         True, 'volume', sub_dirs)
        yaml_files = list_template_dir(metafunc, ['.yaml', '.yml'],
                                       True, '', sub_dirs)
    else:
        volume_files = list_template_dir(metafunc, ['.yaml', '.yml'],
                                         True, 'volume')
        yaml_files = list_template_dir(metafunc, ['.yaml', '.yml'], True)

    pattern = re.compile(r'\_volume$')
    for vfilename in volume_files:
        basename = pattern.sub('', path.splitext(vfilename)[0])
        if basename + '.yml' in yaml_files:
            yfilename = basename + '.yml'
        else:
            yfilename = basename + '.yaml'

        try:
            with open(vfilename) as fh:
                vyml = yaml.load(fh)
            with open(yfilename) as fh:
                yyml = yaml.load(fh)

            if 'fail' in vfilename:
                pairs.append(pytest.mark.xfail({"name": basename,
                                                "yyml": yyml,
                                                "vyml": vyml},
                             strict=True))
            else:
                pairs.append({"name": basename, "yyml": yyml, "vyml": vyml})

        except Exception as e:
            print(e)

    metafunc.parametrize('heat_volume_pair', pairs)