import builtins

import pytest

from xonsh.completers.python import python_signature_complete


@pytest.fixture(autouse=True)
def xonsh_execer_autouse(xonsh_builtins, xonsh_execer):
    return xonsh_execer


def foo(x, y, z):
    pass


def bar(wakka='wow', jawaka='mom'):
    pass


def baz(sonata, artica=True):
    pass


def always_true(x, y):
    return True


BASE_CTX = {'foo': foo, 'bar': bar, 'baz': baz}
FOO_ARGS = {'x=', 'y=', 'z='}
BAR_ARGS = {'wakka=', 'jawaka='}
BAZ_ARGS = {'sonata=', 'artica='}


@pytest.mark.parametrize('line, end, exp', [
    ('foo(', 4, FOO_ARGS),   # I have no idea why this one needs to be first
    ('foo()', 3, set()),
    ('foo()', 4, FOO_ARGS),
    ('foo()', 5, set()),
    ('foo(x, ', 6, FOO_ARGS),
    ('foo(x, )', 6, FOO_ARGS),
    ('bar()', 4, BAR_ARGS),
    ('baz()', 4, BAZ_ARGS),
    ('foo(bar(', 8, BAR_ARGS),
    ('foo(bar()', 9, FOO_ARGS),
    ('foo(bar())', 4, FOO_ARGS),
])
def test_complete_python_signatures(line, end, exp):
    ctx = dict(BASE_CTX)
    obs = python_signature_complete('', line, end, ctx, always_true)
    assert exp == obs