import importlib

import pytest
import redis
from packaging.version import Version

REDIS_VERSION = Version(redis.__version__)


def raw_command(r, *args):
    """Like execute_command, but does not do command-specific response parsing"""
    response_callbacks = r.response_callbacks
    try:
        r.response_callbacks = {}
        return r.execute_command(*args)
    finally:
        r.response_callbacks = response_callbacks


# Wrap some redis commands to abstract differences between redis-py 2 and 3.
def zadd(r, key, d, *args, **kwargs):
    if REDIS_VERSION >= Version('3'):
        return r.zadd(key, d, *args, **kwargs)
    else:
        return r.zadd(key, **d)


def run_test_if_redis_ver(condition: str, ver: str):
    cond = REDIS_VERSION < Version(ver) if condition == 'above' else REDIS_VERSION > Version(ver)
    return pytest.mark.skipif(
        cond,
        reason=f"Test is only applicable to redis-py {ver} and above"
    )


_lua_module = importlib.util.find_spec("lupa")
run_test_if_lupa = pytest.mark.skipif(
    _lua_module is None,
    reason="Test is only applicable if lupa is installed"
)

_aioredis_module = importlib.util.find_spec("aioredis")
run_test_if_no_aioredis = pytest.mark.skipif(
    _aioredis_module is not None,
    reason="Test is only applicable if aioredis is not installed",
)