import os
import shutil
import tempfile
import time

from anki import Collection as aopen

# Between 2-4AM, shift the time back so test assumptions hold.
lt = time.localtime()
if lt.tm_hour >= 2 and lt.tm_hour < 4:
    orig_time = time.time

    def adjusted_time():
        return orig_time() - 60 * 60 * 2

    time.time = adjusted_time
else:
    orig_time = None


def assertException(exception, func):
    found = False
    try:
        func()
    except exception:
        found = True
    assert found


# Creating new decks is expensive. Just do it once, and then spin off
# copies from the master.
def getEmptyCol():
    if len(getEmptyCol.master) == 0:
        (fd, nam) = tempfile.mkstemp(suffix=".anki2")
        os.close(fd)
        os.unlink(nam)
        col = aopen(nam)
        col.close(downgrade=False)
        getEmptyCol.master = nam
    (fd, nam) = tempfile.mkstemp(suffix=".anki2")
    shutil.copy(getEmptyCol.master, nam)
    col = aopen(nam)
    return col


getEmptyCol.master = ""

# Fallback for when the DB needs options passed in.
def getEmptyDeckWith(**kwargs):
    (fd, nam) = tempfile.mkstemp(suffix=".anki2")
    os.close(fd)
    os.unlink(nam)
    return aopen(nam, **kwargs)


def getUpgradeDeckPath(name="anki12.anki"):
    src = os.path.join(testDir, "support", name)
    (fd, dst) = tempfile.mkstemp(suffix=".anki2")
    shutil.copy(src, dst)
    return dst


testDir = os.path.dirname(__file__)


def errorsAfterMidnight(func):
    def wrapper():
        lt = time.localtime()
        if lt.tm_hour < 4:
            print("test disabled around cutoff", func)
        else:
            func()

    return wrapper


def isNearCutoff():
    return orig_time is not None
