# (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/>.

from __future__ import annotations

import os.path

import pytest

import ansible.errors

from ansible.executor import module_common as amc
from ansible.executor.interpreter_discovery import InterpreterDiscoveryRequiredError


class TestStripComments:
    def test_no_changes(self):
        no_comments = u"""def some_code():
    return False"""
        assert amc._strip_comments(no_comments) == no_comments

    def test_all_comments(self):
        all_comments = u"""# This is a test
            # Being as it is
            # To be
            """
        assert amc._strip_comments(all_comments) == u""

    def test_all_whitespace(self):
        all_whitespace = (
            '\n'
            '              \n'
            '\n'
            '                \n'
            '\t\t\r\n'
            '\n'
            '            '
        )

        assert amc._strip_comments(all_whitespace) == u""

    def test_somewhat_normal(self):
        mixed = u"""#!/usr/bin/python

# here we go
def test(arg):
    # this is a thing
    thing = '# test'
    return thing
# End
"""
        mixed_results = u"""def test(arg):
    thing = '# test'
    return thing"""
        assert amc._strip_comments(mixed) == mixed_results


class TestSlurp:
    def test_slurp_nonexistent(self, mocker):
        mocker.patch('os.path.exists', side_effect=lambda x: False)
        with pytest.raises(ansible.errors.AnsibleError):
            amc._slurp('no_file')

    def test_slurp_file(self, mocker):
        mocker.patch('os.path.exists', side_effect=lambda x: True)
        m = mocker.mock_open(read_data='This is a test')
        mocker.patch('builtins.open', m)
        assert amc._slurp('some_file') == 'This is a test'

    def test_slurp_file_with_newlines(self, mocker):
        mocker.patch('os.path.exists', side_effect=lambda x: True)
        m = mocker.mock_open(read_data='#!/usr/bin/python\ndef test(args):\nprint("hi")\n')
        mocker.patch('builtins.open', m)
        assert amc._slurp('some_file') == '#!/usr/bin/python\ndef test(args):\nprint("hi")\n'


class TestGetShebang:
    """Note: We may want to change the API of this function in the future.  It isn't a great API"""
    def test_no_interpreter_set(self, templar):
        # normally this would return /usr/bin/python, but so long as we're defaulting to auto python discovery, we'll get
        # an InterpreterDiscoveryRequiredError here instead
        with pytest.raises(InterpreterDiscoveryRequiredError):
            amc._get_shebang(u'/usr/bin/python', {}, templar)

    def test_python_interpreter(self, templar):
        assert amc._get_shebang(u'/usr/bin/python3.8', {}, templar) == ('#!/usr/bin/python3.8', u'/usr/bin/python3.8')

    def test_non_python_interpreter(self, templar):
        assert amc._get_shebang(u'/usr/bin/ruby', {}, templar) == ('#!/usr/bin/ruby', u'/usr/bin/ruby')

    def test_interpreter_set_in_task_vars(self, templar):
        assert amc._get_shebang(u'/usr/bin/python', {u'ansible_python_interpreter': u'/usr/bin/pypy'}, templar) == \
            (u'#!/usr/bin/pypy', u'/usr/bin/pypy')

    def test_non_python_interpreter_in_task_vars(self, templar):
        assert amc._get_shebang(u'/usr/bin/ruby', {u'ansible_ruby_interpreter': u'/usr/local/bin/ruby'}, templar) == \
            (u'#!/usr/local/bin/ruby', u'/usr/local/bin/ruby')

    def test_with_args(self, templar):
        assert amc._get_shebang(u'/usr/bin/python', {u'ansible_python_interpreter': u'/usr/bin/python3'}, templar, args=('-tt', '-OO')) == \
            (u'#!/usr/bin/python3 -tt -OO', u'/usr/bin/python3')

    def test_python_via_env(self, templar):
        assert amc._get_shebang(u'/usr/bin/python', {u'ansible_python_interpreter': u'/usr/bin/env python'}, templar) == \
            (u'#!/usr/bin/env python', u'/usr/bin/env python')


class TestDetectionRegexes:
    ANSIBLE_MODULE_UTIL_STRINGS = (
        # Absolute collection imports
        b'import ansible_collections.my_ns.my_col.plugins.module_utils.my_util',
        b'from ansible_collections.my_ns.my_col.plugins.module_utils import my_util',
        b'from ansible_collections.my_ns.my_col.plugins.module_utils.my_util import my_func',
        # Absolute core imports
        b'import ansible.module_utils.basic',
        b'from ansible.module_utils import basic',
        b'from ansible.module_utils.basic import AnsibleModule',
        # Relative imports
        b'from ..module_utils import basic',
        b'from .. module_utils import basic',
        b'from ....module_utils import basic',
        b'from ..module_utils.basic import AnsibleModule',
    )
    NOT_ANSIBLE_MODULE_UTIL_STRINGS = (
        b'from ansible import release',
        b'from ..release import __version__',
        b'from .. import release',
        b'from ansible.modules.system import ping',
        b'from ansible_collecitons.my_ns.my_col.plugins.modules import function',
    )

    OFFSET = os.path.dirname(os.path.dirname(amc.__file__))
    CORE_PATHS = (
        ('%s/modules/from_role.py' % OFFSET, 'ansible/modules/from_role'),
        ('%s/modules/system/ping.py' % OFFSET, 'ansible/modules/system/ping'),
        ('%s/modules/cloud/amazon/s3.py' % OFFSET, 'ansible/modules/cloud/amazon/s3'),
    )

    COLLECTION_PATHS = (
        ('/root/ansible_collections/ns/col/plugins/modules/ping.py',
         'ansible_collections/ns/col/plugins/modules/ping'),
        ('/root/ansible_collections/ns/col/plugins/modules/subdir/ping.py',
         'ansible_collections/ns/col/plugins/modules/subdir/ping'),
    )

    @pytest.mark.parametrize('testcase', ANSIBLE_MODULE_UTIL_STRINGS)
    def test_detect_new_style_python_module_re(self, testcase):
        assert amc.NEW_STYLE_PYTHON_MODULE_RE.search(testcase)

    @pytest.mark.parametrize('testcase', NOT_ANSIBLE_MODULE_UTIL_STRINGS)
    def test_no_detect_new_style_python_module_re(self, testcase):
        assert not amc.NEW_STYLE_PYTHON_MODULE_RE.search(testcase)

    @pytest.mark.parametrize('testcase, result', CORE_PATHS)
    def test_detect_core_library_path_re(self, testcase, result):
        assert amc.CORE_LIBRARY_PATH_RE.search(testcase).group('path') == result

    @pytest.mark.parametrize('testcase', (p[0] for p in COLLECTION_PATHS))
    def test_no_detect_core_library_path_re(self, testcase):
        assert not amc.CORE_LIBRARY_PATH_RE.search(testcase)

    @pytest.mark.parametrize('testcase, result', COLLECTION_PATHS)
    def test_detect_collection_path_re(self, testcase, result):
        assert amc.COLLECTION_PATH_RE.search(testcase).group('path') == result

    @pytest.mark.parametrize('testcase', (p[0] for p in CORE_PATHS))
    def test_no_detect_collection_path_re(self, testcase):
        assert not amc.COLLECTION_PATH_RE.search(testcase)
