import sys
import logging
import pytest
from configparser import ConfigParser
from threading import Lock, Event

from appengine import Commands, AppEngineException, AEErrs


class SampleModule(Commands):
    """Concrete Commands subclass used across tests."""

    def cmd_add(self, a, b):
        """Add two numbers.

        Args:
            a: First number.
            b: Second number.

        Returns:
            float: Sum of a and b.
        """
        return float(a) + float(b)

    def cmd_raise_ae(self):
        """Raise an AppEngineException."""
        raise AppEngineException(AEErrs.INVALID_PARAMS, "test error")

    def cmd_raise_generic(self):
        """Raise a generic exception."""
        raise RuntimeError("boom")


@pytest.fixture
def log():
    return logging.getLogger("test")


@pytest.fixture
def sample_module(log):
    m = SampleModule(None, log)
    m.lock = Lock()
    m.cmods = {}
    return m


@pytest.fixture(autouse=True)
def clean_imported_modules():
    """Remove dynamically imported cmds_* modules after each test."""
    yield
    to_remove = [k for k in sys.modules if k.startswith("cmds_")]
    for k in to_remove:
        del sys.modules[k]