# (c) 2017, Toshio Kuratomi <tkuratomi@ansible.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

import imp
import zipfile
from collections import namedtuple
from functools import partial
from io import BytesIO, StringIO

import pytest

import ansible.errors
from ansible.compat.six import PY2
from ansible.compat.six.moves import builtins

from ansible.executor.module_common import recursive_finder


original_find_module = imp.find_module


@pytest.fixture
def finder_containers():
    FinderContainers = namedtuple('FinderContainers', ['py_module_names', 'py_module_cache', 'zf'])

    py_module_names = set()
    #py_module_cache = {('__init__',): b''}
    py_module_cache = {}

    zipoutput = BytesIO()
    zf = zipfile.ZipFile(zipoutput, mode='w', compression=zipfile.ZIP_STORED)
    #zf.writestr('ansible/__init__.py', b'')

    return FinderContainers(py_module_names, py_module_cache, zf)


def find_module_foo(module_utils_data, *args, **kwargs):
    if args[0] == 'foo':
        return (module_utils_data, '/usr/lib/python2.7/site-packages/ansible/module_utils/foo.py', ('.py', 'r', imp.PY_SOURCE))
    return original_find_module(*args, **kwargs)


def find_package_foo(module_utils_data, *args, **kwargs):
    if args[0] == 'foo':
        return (module_utils_data, '/usr/lib/python2.7/site-packages/ansible/module_utils/foo', ('', '', imp.PKG_DIRECTORY))
    return original_find_module(*args, **kwargs)


class TestRecursiveFinder(object):
    def test_no_module_utils(self, finder_containers):
        name = 'ping'
        data = b'#!/usr/bin/python\nreturn \'{\"changed\": false}\''
        recursive_finder(name, data, *finder_containers)
        assert finder_containers.py_module_names == set(())
        assert finder_containers.py_module_cache == {}
        assert frozenset(finder_containers.zf.namelist()) == frozenset()

    def test_from_import_toplevel_package(self, finder_containers, mocker):
        if PY2:
            module_utils_data = BytesIO(b'# License\ndef do_something():\n    pass\n')
        else:
            module_utils_data = StringIO(u'# License\ndef do_something():\n    pass\n')
        mocker.patch('imp.find_module', side_effect=partial(find_package_foo, module_utils_data))
        mocker.patch('ansible.executor.module_common._slurp', side_effect= lambda x: b'# License\ndef do_something():\n    pass\n')

        name = 'ping'
        data = b'#!/usr/bin/python\nfrom ansible.module_utils import foo'
        recursive_finder(name, data, *finder_containers)
        mocker.stopall()

        assert finder_containers.py_module_names == set((('foo', '__init__'),))
        assert finder_containers.py_module_cache == {}
        assert frozenset(finder_containers.zf.namelist()) == frozenset(('ansible/module_utils/foo/__init__.py',))

    def test_from_import_toplevel_module(self, finder_containers, mocker):
        if PY2:
            module_utils_data = BytesIO(b'# License\ndef do_something():\n    pass\n')
        else:
            module_utils_data = StringIO(u'# License\ndef do_something():\n    pass\n')
        mocker.patch('imp.find_module', side_effect=partial(find_module_foo, module_utils_data))

        name = 'ping'
        data = b'#!/usr/bin/python\nfrom ansible.module_utils import foo'
        recursive_finder(name, data, *finder_containers)
        mocker.stopall()

        assert finder_containers.py_module_names == set((('foo',),))
        assert finder_containers.py_module_cache == {}
        assert frozenset(finder_containers.zf.namelist()) == frozenset(('ansible/module_utils/foo.py',))

    #
    # Test importing six with many permutations because it is not a normal module
    #
    def test_from_import_six(self, finder_containers):
        name = 'ping'
        data = b'#!/usr/bin/python\nfrom ansible.module_utils import six'
        recursive_finder(name, data, *finder_containers)
        assert finder_containers.py_module_names == set((('six',),))
        assert finder_containers.py_module_cache == {}
        assert frozenset(finder_containers.zf.namelist()) == frozenset(('ansible/module_utils/six.py',))

    def test_import_six(self, finder_containers):
        name = 'ping'
        data = b'#!/usr/bin/python\nimport ansible.module_utils.six'
        recursive_finder(name, data, *finder_containers)
        assert finder_containers.py_module_names == set((('six',),))
        assert finder_containers.py_module_cache == {}
        assert frozenset(finder_containers.zf.namelist()) == frozenset(('ansible/module_utils/six.py',))

    def test_import_six_from_many_submodules(self, finder_containers):
        name = 'ping'
        data = b'#!/usr/bin/python\nfrom ansible.module_utils.six.moves.urllib.parse import urlparse'
        recursive_finder(name, data, *finder_containers)
        assert finder_containers.py_module_names == set((('six',),))
        assert finder_containers.py_module_cache == {}
        assert frozenset(finder_containers.zf.namelist()) == frozenset(('ansible/module_utils/six.py',))