import sys
import pytest
from unittest import mock
from pargv import parse_args


def test_no_argv():
    with mock.patch('sys.argv', []):
        args, kwargs = parse_args()
    assert args == []
    assert kwargs == {}


def test_use_sys_argv_by_default():
    with mock.patch('sys.argv', ['app', 'command', '--option=one', 'two', '--flag', '-io']):
        args, kwargs = parse_args()
    assert args == ['app', 'command']
    assert kwargs == {
        'option': ['one', 'two'],
        'flag': True,
        'i': True,
        'o': True
    }


def test_single_positional_argument():
    args, kwargs = parse_args(['app'])
    assert args == ['app']
    assert kwargs == {}


def test_single_positional_argument_with_underscore():
    args, kwargs = parse_args(['the-app'])
    assert args == ['the_app']
    assert kwargs == {}


def test_positional_arguments():
    args, kwargs = parse_args(['app', 'command'])
    assert args == ['app', 'command']
    assert kwargs == {}


def test_one_positional_and_optional_argument():
    args, kwargs = parse_args(['app', '--help'])
    assert args == ['app']
    assert kwargs == {'help': True}


def test_positional_and_optional_arguments():
    args, kwargs = parse_args(['app', 'command', '--inputfile', '--outputfile'])
    assert args == ['app', 'command']
    assert kwargs == {
        'inputfile': True,
        'outputfile': True
        }


def test_short_arg_with_single_option():
    args, kwargs = parse_args(['-a', 'b', '--abc', 'd'])
    assert args == []
    assert kwargs == {
        'a': 'b',
        'abc': 'd',
    }


def test_short_arg_with_multiple_options():
    args, kwargs = parse_args(['-i', 'a', 'b', '--input', 'c', 'd'])
    assert args == []
    assert kwargs == {
        'i': ['a', 'b'],
        'input': ['c', 'd']
    }


def test_long_args_with_equals():
    args, kwargs = parse_args(['--input-file=a.py', '--output-file=b.py'])
    assert args == []
    assert kwargs == {
        'input_file': 'a.py',
        'output_file': 'b.py'
    }


def test_unintended_hyphen():
    args, kwargs = parse_args(['---triple-hyphen-'])
    assert args == []
    assert kwargs == {'_triple_hyphen_': True}


@pytest.mark.parametrize('argv, args, kwargs', ((
    ['/pargv/pargv.py', 'command', 'positional', '--flag', '--optional=value', 'test', '--output-file', 'filename', '-flg', 'name', 'name2'],
    ['/pargv/pargv.py', 'command', 'positional'],
    {
        'flag': True,
        'optional': ['value', 'test'],
        'output_file': 'filename',
        'f': True,
        'l': True,
        'g': ['name', 'name2'],
    }
),))
def test_all_parameters_at_once(argv, args, kwargs):
    _args, _kwargs = parse_args(argv)
    assert _args == args
    assert _kwargs == kwargs