import sys
if sys.version_info > (3, 5):
    from typing import Generic, TypeVar, List

import pytest

import jedi
from jedi.inference.value import ModuleValue


def interpreter(code, namespace, *args, **kwargs):
    return jedi.Interpreter(code, [namespace], *args, **kwargs)


def test_on_code():
    from functools import wraps
    i = interpreter("wraps.__code__", {'wraps': wraps})
    assert i.infer()


@pytest.mark.skipif('sys.version_info < (3,5)')
def test_generics_without_definition():
    # Used to raise a recursion error
    T = TypeVar('T')

    class Stack(Generic[T]):
        def __init__(self):
            self.items = []  # type: List[T]

        def push(self, item):
            self.items.append(item)

        def pop(self):
            # type: () -> T
            return self.items.pop()

    class StackWrapper():
        def __init__(self):
            self.stack = Stack()
            self.stack.push(1)

    s = StackWrapper()
    assert not interpreter('s.stack.pop().', locals()).complete()


def test_mixed_module_cache():
    """Caused by #1479"""
    interpreter = jedi.Interpreter('jedi', [{'jedi': jedi}])
    d, = interpreter.infer()
    assert d.name == 'jedi'
    inference_state = interpreter._inference_state
    jedi_module, = inference_state.module_cache.get(('jedi',))
    assert isinstance(jedi_module, ModuleValue)