# -*- coding: utf-8 -*-
# Copyright: (c) 2017, Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

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

import os
import os.path
import stat

import pytest

from ansible.config.manager import find_ini_config_file


real_exists = os.path.exists
real_isdir = os.path.isdir

working_dir = os.path.dirname(__file__)
cfg_in_cwd = os.path.join(working_dir, 'ansible.cfg')

cfg_dir = os.path.join(working_dir, 'data')
cfg_file = os.path.join(cfg_dir, 'ansible.cfg')
alt_cfg_file = os.path.join(cfg_dir, 'test.cfg')
cfg_in_homedir = os.path.expanduser('~/.ansible.cfg')


@pytest.fixture
def setup_env(request):
    cur_config = os.environ.get('ANSIBLE_CONFIG', None)
    cfg_path = request.param[0]

    if cfg_path is None and cur_config:
        del os.environ['ANSIBLE_CONFIG']
    else:
        os.environ['ANSIBLE_CONFIG'] = request.param[0]

    yield

    if cur_config is None and cfg_path:
        del os.environ['ANSIBLE_CONFIG']
    else:
        os.environ['ANSIBLE_CONFIG'] = cur_config


@pytest.fixture
def setup_existing_files(request, monkeypatch):
    def _os_path_exists(path):
        if path in (request.param[0]):
            return True
        else:
            return False

    # Enable user and system dirs so that we know cwd takes precedence
    monkeypatch.setattr("os.path.exists", _os_path_exists)
    monkeypatch.setattr("os.getcwd", lambda: os.path.dirname(cfg_dir))
    monkeypatch.setattr("os.path.isdir", lambda path: True if path == cfg_dir else real_isdir(path))


class TestFindIniFile:
    # This tells us to run twice, once with a file specified and once with a directory
    @pytest.mark.parametrize('setup_env, expected', (([alt_cfg_file], alt_cfg_file), ([cfg_dir], cfg_file)), indirect=['setup_env'])
    # This just passes the list of files that exist to the fixture
    @pytest.mark.parametrize('setup_existing_files',
                             [[('/etc/ansible/ansible.cfg', cfg_in_homedir, cfg_in_cwd, alt_cfg_file, cfg_file)]],
                             indirect=['setup_existing_files'])
    def test_env_has_cfg_file(self, setup_env, setup_existing_files, expected):
        """ANSIBLE_CONFIG is specified, use it"""
        warnings = set()
        assert find_ini_config_file(warnings) == expected
        assert warnings == set()

    @pytest.mark.parametrize('setup_env', ([alt_cfg_file], [cfg_dir]), indirect=['setup_env'])
    @pytest.mark.parametrize('setup_existing_files',
                             [[('/etc/ansible/ansible.cfg', cfg_in_homedir, cfg_in_cwd)]],
                             indirect=['setup_existing_files'])
    def test_env_has_no_cfg_file(self, setup_env, setup_existing_files):
        """ANSIBLE_CONFIG is specified but the file does not exist"""

        warnings = set()
        # since the cfg file specified by ANSIBLE_CONFIG doesn't exist, the one at cwd that does
        # exist should be returned
        assert find_ini_config_file(warnings) == cfg_in_cwd
        assert warnings == set()

    # ANSIBLE_CONFIG not specified
    @pytest.mark.parametrize('setup_env', [[None]], indirect=['setup_env'])
    # All config files are present
    @pytest.mark.parametrize('setup_existing_files',
                             [[('/etc/ansible/ansible.cfg', cfg_in_homedir, cfg_in_cwd, cfg_file, alt_cfg_file)]],
                             indirect=['setup_existing_files'])
    def test_ini_in_cwd(self, setup_env, setup_existing_files):
        """ANSIBLE_CONFIG not specified.  Use the cwd cfg"""
        warnings = set()
        assert find_ini_config_file(warnings) == cfg_in_cwd
        assert warnings == set()

    # ANSIBLE_CONFIG not specified
    @pytest.mark.parametrize('setup_env', [[None]], indirect=['setup_env'])
    # No config in cwd
    @pytest.mark.parametrize('setup_existing_files',
                             [[('/etc/ansible/ansible.cfg', cfg_in_homedir, cfg_file, alt_cfg_file)]],
                             indirect=['setup_existing_files'])
    def test_ini_in_homedir(self, setup_env, setup_existing_files):
        """First config found is in the homedir"""
        warnings = set()
        assert find_ini_config_file(warnings) == cfg_in_homedir
        assert warnings == set()

    # ANSIBLE_CONFIG not specified
    @pytest.mark.parametrize('setup_env', [[None]], indirect=['setup_env'])
    # No config in cwd
    @pytest.mark.parametrize('setup_existing_files', [[('/etc/ansible/ansible.cfg', cfg_file, alt_cfg_file)]], indirect=['setup_existing_files'])
    def test_ini_in_systemdir(self, setup_env, setup_existing_files):
        """First config found is the system config"""
        warnings = set()
        assert find_ini_config_file(warnings) == '/etc/ansible/ansible.cfg'
        assert warnings == set()

    # ANSIBLE_CONFIG not specified
    @pytest.mark.parametrize('setup_env', [[None]], indirect=['setup_env'])
    # No config in cwd
    @pytest.mark.parametrize('setup_existing_files',
                             [[('/etc/ansible/ansible.cfg', cfg_in_homedir, cfg_file, alt_cfg_file)]],
                             indirect=['setup_existing_files'])
    def test_cwd_does_not_exist(self, setup_env, setup_existing_files, monkeypatch):
        """Smoketest current working directory doesn't exist"""
        def _os_stat(path):
            raise OSError('%s does not exist' % path)
        monkeypatch.setattr('os.stat', _os_stat)

        warnings = set()
        assert find_ini_config_file(warnings) == cfg_in_homedir
        assert warnings == set()

    @pytest.mark.parametrize('setup_env', [[None]], indirect=['setup_env'])
    # No config in cwd
    @pytest.mark.parametrize('setup_existing_files', [[list()]], indirect=['setup_existing_files'])
    def test_no_config(self, setup_env, setup_existing_files):
        """No config present, no config found"""
        warnings = set()
        assert find_ini_config_file(warnings) is None
        assert warnings == set()

    # ANSIBLE_CONFIG not specified
    @pytest.mark.parametrize('setup_env', [[None]], indirect=['setup_env'])
    # All config files are present
    @pytest.mark.parametrize('setup_existing_files',
                             [[('/etc/ansible/ansible.cfg', cfg_in_homedir, cfg_in_cwd, cfg_file, alt_cfg_file)]],
                             indirect=['setup_existing_files'])
    def test_cwd_warning_on_writable(self, setup_env, setup_existing_files, monkeypatch):
        """If the cwd is writable, warn and skip it """
        real_stat = os.stat

        def _os_stat(path):
            if path == working_dir:
                from posix import stat_result
                stat_info = list(real_stat(path))
                stat_info[stat.ST_MODE] |= stat.S_IWOTH
                return stat_result(stat_info)
            else:
                return real_stat(path)

        monkeypatch.setattr('os.stat', _os_stat)

        warnings = set()
        assert find_ini_config_file(warnings) == cfg_in_homedir
        assert len(warnings) == 1
        warning = warnings.pop()
        assert u'Ansible is being run in a world writable directory' in warning
        assert u'ignoring it as an ansible.cfg source' in warning

    # ANSIBLE_CONFIG is sepcified
    @pytest.mark.parametrize('setup_env, expected', (([alt_cfg_file], alt_cfg_file), ([cfg_in_cwd], cfg_in_cwd)), indirect=['setup_env'])
    # All config files are present
    @pytest.mark.parametrize('setup_existing_files',
                             [[('/etc/ansible/ansible.cfg', cfg_in_homedir, cfg_in_cwd, cfg_file, alt_cfg_file)]],
                             indirect=['setup_existing_files'])
    def test_no_warning_on_writable_if_env_used(self, setup_env, setup_existing_files, monkeypatch, expected):
        """If the cwd is writable but ANSIBLE_CONFIG was used, no warning should be issued"""
        real_stat = os.stat

        def _os_stat(path):
            if path == working_dir:
                from posix import stat_result
                stat_info = list(real_stat(path))
                stat_info[stat.ST_MODE] |= stat.S_IWOTH
                return stat_result(stat_info)
            else:
                return real_stat(path)

        monkeypatch.setattr('os.stat', _os_stat)

        warnings = set()
        assert find_ini_config_file(warnings) == expected
        assert warnings == set()

    # ANSIBLE_CONFIG not specified
    @pytest.mark.parametrize('setup_env', [[None]], indirect=['setup_env'])
    # All config files are present
    @pytest.mark.parametrize('setup_existing_files',
                             [[('/etc/ansible/ansible.cfg', cfg_in_homedir, cfg_in_cwd, cfg_file, alt_cfg_file)]],
                             indirect=['setup_existing_files'])
    def test_cwd_warning_on_writable_no_warning_set(self, setup_env, setup_existing_files, monkeypatch):
        """Smoketest that the function succeeds even though no warning set was passed in"""
        real_stat = os.stat

        def _os_stat(path):
            if path == working_dir:
                from posix import stat_result
                stat_info = list(real_stat(path))
                stat_info[stat.ST_MODE] |= stat.S_IWOTH
                return stat_result(stat_info)
            else:
                return real_stat(path)

        monkeypatch.setattr('os.stat', _os_stat)

        assert find_ini_config_file() == cfg_in_homedir