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import pytest
import asyncio
import subprocess
from pathlib import Path
from unittest.mock import patch, mock_open

from gita import utils, info
from conftest import (
    PATH_FNAME, PATH_FNAME_EMPTY, PATH_FNAME_CLASH, GROUP_FNAME, TEST_DIR,
)


@pytest.mark.parametrize('input, expected', [
    ([], ({'repo1': {'path': '/a/bcd/repo1', 'type': '', 'flags': []}, 'xxx': {'path': '/a/b/c/repo3', 'type': '', 'flags': []}, 'repo2': {'path': '/e/fgh/repo2', 'type': '', 'flags': []}}, [])),
    (['st'], ({'repo1': {'path': '/a/bcd/repo1', 'type': '', 'flags': []}, 'xxx': {'path': '/a/b/c/repo3', 'type': '', 'flags': []}, 'repo2': {'path': '/e/fgh/repo2', 'type': '', 'flags': []}}, ['st'])),
    (['repo1', 'st'], ({'repo1': {'flags': [], 'path': '/a/bcd/repo1', 'type': ''}}, ['st'])),
    (['repo1'], ({'repo1': {'flags': [], 'path': '/a/bcd/repo1', 'type': ''}}, [])),
    ])
@patch('gita.utils.is_git', return_value=True)
@patch('gita.common.get_config_fname', return_value=PATH_FNAME)
def test_parse_repos_and_rest(mock_path_fname, _, input, expected):
    got = utils.parse_repos_and_rest(input)
    assert got == expected


@pytest.mark.parametrize('repo_path, paths, expected', [
    ('/a/b/c/repo', ['/a/b'], (('b', 'c'), '/a')),
    ])
def test_generate_dir_hash(repo_path, paths, expected):
    got = utils._generate_dir_hash(repo_path, paths)
    assert got == expected


@pytest.mark.parametrize('repos, paths, expected', [
    ({'r1': {'path': '/a/b//repo1'}, 'r2': {'path': '/a/b/repo2'}},
        ['/a/b'], {'b': {'repos': ['r1', 'r2'], 'path': '/a/b'}}),
    ({'r1': {'path': '/a/b//repo1'}, 'r2': {'path': '/a/b/c/repo2'}},
        ['/a/b'], {'b': {'repos': ['r1', 'r2'], 'path': '/a/b'},
            'b-c': {'repos': ['r2'], 'path': "/a/b/c"}}),
    ({'r1': {'path': '/a/b/c/repo1'}, 'r2': {'path': '/a/b/c/repo2'}},
        ['/a/b'], {'b-c': {'repos': ['r1', 'r2'], 'path': '/a/b/c'},
            'b': {'path': '/a/b', 'repos': ['r1', 'r2']}}),
    ])
def test_auto_group(repos, paths, expected):
    got = utils.auto_group(repos, paths)
    assert got == expected


@pytest.mark.parametrize('test_input, diff_return, expected', [
    ([{'abc': {'path': '/root/repo/', 'type': '', 'flags': []}}, False],
        True, 'abc \x1b[31mrepo *+_  \x1b[0m msg xx'),
    ([{'abc': {'path': '/root/repo/', 'type': '', 'flags': []}}, True],
        True, 'abc repo *+_   msg xx'),
    ([{'repo': {'path': '/root/repo2/', 'type': '', 'flags': []}}, False],
        False, 'repo \x1b[32mrepo _    \x1b[0m msg xx'),
])
def test_describe(test_input, diff_return, expected, monkeypatch):
    monkeypatch.setattr(info, 'get_head', lambda x: 'repo')
    monkeypatch.setattr(info, 'run_quiet_diff', lambda *_: diff_return)
    monkeypatch.setattr(info, 'get_commit_msg', lambda *_: "msg")
    monkeypatch.setattr(info, 'get_commit_time', lambda *_: "xx")
    monkeypatch.setattr(info, 'has_untracked', lambda *_: True)
    monkeypatch.setattr('os.chdir', lambda x: None)

    info.get_color_encoding.cache_clear()  # avoid side effect
    assert expected == next(utils.describe(*test_input))


@pytest.mark.parametrize('path_fname, expected', [
    (PATH_FNAME, {
        'repo1': {'path': '/a/bcd/repo1', 'type': '', 'flags': []},
        'repo2': {'path': '/e/fgh/repo2', 'type': '', 'flags': []},
        'xxx': {'path': '/a/b/c/repo3', 'type': '', 'flags': []},
    }),
    (PATH_FNAME_EMPTY, {}),
    (PATH_FNAME_CLASH, {
        'repo2': {'path': '/e/fgh/repo2', 'type': '', 'flags': ['--haha', '--pp']},
        'repo1': {'path': '/root/x/repo1', 'type': '', 'flags': []}
    }),
])
@patch('gita.utils.is_git', return_value=True)
@patch('gita.common.get_config_fname')
def test_get_repos(mock_path_fname, _, path_fname, expected):
    mock_path_fname.return_value = path_fname
    utils.get_repos.cache_clear()
    assert utils.get_repos() == expected


@patch('gita.common.get_config_dir')
def test_get_context(mock_config_dir):
    mock_config_dir.return_value = TEST_DIR
    utils.get_context.cache_clear()
    assert utils.get_context() == TEST_DIR / 'xx.context'

    mock_config_dir.return_value = '/'
    utils.get_context.cache_clear()
    assert utils.get_context() == None


@pytest.mark.parametrize('group_fname, expected', [
    (GROUP_FNAME, {'xx': {'repos': ['a', 'b'], 'path': ''},
        'yy': {'repos': ['a', 'c', 'd'], 'path': ''}}),
])
@patch('gita.common.get_config_fname')
def test_get_groups(mock_group_fname, group_fname, expected):
    mock_group_fname.return_value = group_fname
    utils.get_groups.cache_clear()
    assert utils.get_groups() == expected


@patch('os.path.isfile', return_value=True)
@patch('os.path.getsize', return_value=True)
def test_custom_push_cmd(*_):
    with patch('builtins.open',
            mock_open(read_data='{"push":{"cmd":"hand","help":"me","allow_all":true}}')):
        cmds = utils.get_cmds_from_files()
    assert cmds['push'] == {'cmd': 'hand', 'help': 'me', 'allow_all': True}


@pytest.mark.parametrize(
    'path_input, expected',
    [
        (['/home/some/repo'], '/home/some/repo,some/repo,,\r\n'),  # add one new
        (['/home/some/repo1', '/repo2'],
            {'/repo2,repo2,,\r\n',  # add two new
            '/home/some/repo1,repo1,,\r\n'}),  # add two new
        (['/home/some/repo1', '/nos/repo'],
         '/home/some/repo1,repo1,,\r\n'),  # add one old one new
    ])
@patch('os.makedirs')
@patch('gita.utils.is_git', return_value=True)
def test_add_repos(_0, _1, path_input, expected, monkeypatch):
    monkeypatch.setenv('XDG_CONFIG_HOME', '/config')
    with patch('builtins.open', mock_open()) as mock_file:
        utils.add_repos({'repo': {'path': '/nos/repo'}}, path_input)
    mock_file.assert_called_with('/config/gita/repos.csv', 'a+', newline='')
    handle = mock_file()
    if type(expected) == str:
        handle.write.assert_called_once_with(expected)
    else:
        # the write order is random
        assert handle.write.call_count == 2
        args, kwargs = handle.write.call_args
        assert args[0] in expected
        assert not kwargs


@patch('gita.utils.write_to_groups_file')
@patch('gita.utils.write_to_repo_file')
def test_rename_repo(mock_write, _):
    repos = {'r1': {'path': '/a/b', 'type': None},
            'r2': {'path': '/c/c', 'type': None}}
    utils.rename_repo(repos, 'r2', 'xxx')
    mock_write.assert_called_once_with(repos, 'w')


def test_async_output(capfd):
    tasks = [
        utils.run_async('myrepo', '.', [
            'python3', '-c',
            f"print({i});import time; time.sleep({i});print({i})"
        ]) for i in range(4)
    ]
    # I don't fully understand why a new loop is needed here. Without a new
    # loop, "pytest" fails but "pytest tests/test_utils.py" works. Maybe pytest
    # itself uses asyncio (or maybe pytest-xdist)?
    asyncio.set_event_loop(asyncio.new_event_loop())
    utils.exec_async_tasks(tasks)

    out, err = capfd.readouterr()
    assert err == ''
    assert out == 'myrepo: 0\nmyrepo: 0\n\nmyrepo: 1\nmyrepo: 1\n\nmyrepo: 2\nmyrepo: 2\n\nmyrepo: 3\nmyrepo: 3\n\n'


def test_is_git(tmpdir):
    with tmpdir.as_cwd():
        subprocess.run('git init --bare .'.split())
        assert utils.is_git(Path.cwd()) is False
        assert utils.is_git(Path.cwd(), include_bare=True) is True