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

from django.shortcuts import get_object_or_404
from django.core.cache import cache

from accounts.models import User
from emencia.django.newsletter.models import Contact


def get_referer(request, default=None):
    referer = request.META.get('HTTP_REFERER')
    if not referer:
        return default
    # remove the protocol and split the url at the slashes
    referer = re.sub('^https?:\/\/', '', referer).split('/')
    # add the slash at the relative path's view and finished
    referer = u'/' + u'/'.join(referer[1:])
    return referer

def split_params(st):
    st = st.split('/')
    params = []

    for item in st:
        n = item.find('-')
        if n != -1:
            params.append({'type': item[:n], 'url':item[n+1:]})

    return params

def dates_range(date1, date2):
    delta = date2 - date1
    dates = []
    for i in range(delta.days + 1):
        dates.append(date1 + datetime.timedelta(days=i))
    return dates

def get_user(url):
    try:
        url = int(url)
        user = get_object_or_404(User, id=url)
    except ValueError:
        user = get_object_or_404(User, url=url)
    return user

def get_subscribers_count():
    key = 'contact_count'
    count = cache.get(key)
    if count is None:
        count = Contact.objects.valid_subscribers().filter(from_users=False).count()
        cache.set(key, count, datetime.timedelta(days=1).total_seconds())
    return count