import difflib

import pytest

from jedi._compatibility import u
from jedi.parser import Parser

code_basic_features = u('''
"""A mod docstring"""

def a_function(a_argument, a_default = "default"):
    """A func docstring"""

    a_result = 3 * a_argument
    print(a_result)  # a comment
    b = """
from
to""" + "huhu"


    if a_default == "default":
        return str(a_result)
    else
        return None
''')


def diff_code_assert(a, b, n=4):
    if a != b:
        diff = "\n".join(difflib.unified_diff(
            a.splitlines(),
            b.splitlines(),
            n=n,
            lineterm=""
        ))
        assert False, "Code does not match:\n%s\n\ncreated code:\n%s" % (
            diff,
            b
        )
    pass


@pytest.mark.skipif('True', reason='Refactor a few parser things first.')
def test_basic_parsing():
    """Validate the parsing features"""

    prs = Parser(code_basic_features)
    diff_code_assert(
        code_basic_features,
        prs.module.get_code2()
    )


@pytest.mark.skipif('True', reason='Not yet working.')
def test_operators():
    src = u('5  * 3')
    prs = Parser(src)
    diff_code_assert(src, prs.module.get_code())


@pytest.mark.skipif('True', reason='Broke get_code support for yield/return statements.')
def test_get_code():
    """Use the same code that the parser also generates, to compare"""
    s = u('''"""a docstring"""
class SomeClass(object, mixin):
    def __init__(self):
        self.xy = 3.0
        """statement docstr"""
    def some_method(self):
        return 1
    def yield_method(self):
        while hasattr(self, 'xy'):
            yield True
        for x in [1, 2]:
            yield x
    def empty(self):
        pass
class Empty:
    pass
class WithDocstring:
    """class docstr"""
    pass
def method_with_docstring():
    """class docstr"""
    pass
''')
    assert Parser(s).module.get_code() == s