import datetime

from django.contrib.auth.models import User
from djangotools.common.types import parse_date
from djangotools.models import UserPreferenceManager

from baby.app.context.base import UserPrefences
from baby.app.models.regle import Regle

def get_user(user=None, pref_class=UserPrefences):
    if user is None:
        try:
            user = User.objects.create_user("user")
        except User.DoesNotExist:
            user = User.objects.get(username="user")
    if isinstance(pref_class, UserPreferenceManager):
        user.pref = pref_class
    if callable(pref_class):
        user.pref = pref_class(user)
    else:
        user.pref = UserPreferenceManagerMocker(user, pref_class)
    return user

def create_regles(lengthes, delta=0, today=None, user=None, pref_class=UserPrefences):
    user = get_user(user, pref_class=pref_class)

    if isinstance(today, str):
        today = parse_date(today)
    curr =  today or datetime.date.today()
    if isinstance(delta, int):
        curr = curr - datetime.timedelta(days=delta)
    elif isinstance(delta, datetime.timedelta):
        curr = curr - delta
    else:
        raise Exception()

    Regle.objects.create(user, curr)
    for duration in reversed(lengthes):
        curr -= datetime.timedelta(days=duration)
        Regle.objects.create(user, curr)

    return user


class UserPreferenceManagerMocker(UserPreferenceManager):

    def __init__(self, user, data, profile="default"):
        super().__init__(user, profile)
        self.data = data

    def get(self, key, default=None):
        return self.data.get(key, default)

def prefs(data, classe=UserPrefences):
    class Classe(classe):
        def __init__(self, user, profile="default", data=data):
            super().__init__(user, profile)
            self.data = data

        def get(self, key, default=None):
            return self.data.get(key, default)

    return Classe

class Request:

    def __init__(self, method, user, get=None, post=None, body=None, headers=None, pref_class=UserPrefences):
        self.method = method
        self.GET = get or {}
        self.POST = post or {}
        self.body = body
        self.headers = headers if headers is not None else {}

        self.user = get_user(user, pref_class)


    def test(self, Context,  **kwargs):
        ctx = Context()
        return ctx.get_context(self, **kwargs)