"""Each downloaded lesson uses a fresh in-memory database and temporary media."""
import atexit
import os
from io import StringIO
from tempfile import TemporaryDirectory

def start():
    os.environ["DJANGO_SETTINGS_MODULE"] = "workshop_site.settings"
    os.environ["LAB_DB"] = ":memory:"
    os.environ["LAB_DEBUG"] = "1"
    media = TemporaryDirectory(prefix="bhylu-django-media-")
    os.environ["LAB_MEDIA_ROOT"] = media.name
    atexit.register(media.cleanup)
    import django
    django.setup()
    from django.core.management import call_command
    call_command("migrate", verbosity=0, interactive=False)
    call_command("seed_lab", verbosity=0, stdout=StringIO())