from os import chdir, getcwd, mkdir, listdir
from os.path import isdir

from pytest import fixture


def pytest_sessionstart(session):
    """
    Called after the Session object has been created and
    before performing collection and entering the run test loop.

    Automatic change path to the `dag-flow/test` and create `test/output` dir
    """
    while(path := getcwd()):
        if (lastdir := path.split("/")[-1]) == "test":
            break
        elif ".git" in listdir(path):
            chdir("./test")
            break
        else:
            chdir("..")
    if not isdir("output"):
        mkdir("output")


def pytest_addoption(parser):
    parser.addoption("--debug_graph", action="store_true", default=False)


@fixture(scope="session")
def debug_graph(request):
    return request.config.option.debug_graph