# -*- coding: utf-8 -*-
import datetime
import os

from django.apps import AppConfig
from django.conf import settings
from django.db.models.signals import post_migrate

from dbsettings.loading import set_setting_value, setting_in_db

from babybuddy import VERSION


def create_read_only_group(sender, **kwargs):
    from django.contrib.auth.models import Group

    Group.objects.get_or_create(name=settings.BABY_BUDDY["READ_ONLY_GROUP_NAME"])


def set_default_site_settings(sender, **kwargs):
    """
    Sets default values for site-wide settings.

    Based on `dbsettings.utils.set_defaults` which no longer seem to work in
    the latest versions of Django.
    """
    from core import models

    # Removed `NAP_START_MIN` and `NAP_START_MAX` values are referenced here
    # for pre-2.0.0 migrations.
    try:
        nap_start_min = datetime.datetime.strptime(
            os.environ.get("NAP_START_MIN"), "%H:%M"
        ).time()
    except (TypeError, ValueError):
        nap_start_min = models.Sleep.settings.nap_start_min
    try:
        nap_start_max = datetime.datetime.strptime(
            os.environ.get("NAP_START_MAX"), "%H:%M"
        ).time()
    except (TypeError, ValueError):
        nap_start_max = models.Sleep.settings.nap_start_max

    defaults = (
        ("Sleep", "nap_start_min", nap_start_min),
        ("Sleep", "nap_start_max", nap_start_max),
    )
    for class_name, attribute_name, value in defaults:
        if not setting_in_db("core.models", class_name, attribute_name):
            set_setting_value("core.models", class_name, attribute_name, value)


class BabyBuddyConfig(AppConfig):
    name = "babybuddy"
    verbose_name = "Baby Buddy"
    version = VERSION
    version_string = VERSION

    def ready(self):
        if os.path.isfile(".git/refs/heads/master"):
            commit = open(".git/refs/heads/master").read()
            self.version_string += " ({})".format(commit[0:7])
        post_migrate.connect(create_read_only_group, sender=self)
        post_migrate.connect(set_default_site_settings, sender=self)