from django.utils.translation import ugettext_lazy as _
from django.http import HttpResponseRedirect, QueryDict
from django.template.loader import render_to_string
from django.shortcuts import render
from django.contrib import messages
from neluser.models import NelUser
from django.conf import settings
from django.urls import reverse
from utils import is_link_legit


def is_nsfw_allowed(request):
    if isinstance(request.user, NelUser):
        if request.user.nsfw_allowed:
            return True
    s = request.COOKIES.get(settings.KHAGANAT_NSFW_NAME) or ''
    return s.lower() in settings.KHAGANAT_NSFW_OK


def disable_view(request):
    if isinstance(request.user, NelUser):
        request.user.nsfw_allowed = False
        request.user.save()
    next_url = QueryDict(request.META.get('QUERY_STRING')).get('next')
    if not is_link_legit(next_url):
        next_url = reverse('index')
    response = HttpResponseRedirect(next_url)
    response.delete_cookie(settings.KHAGANAT_NSFW_NAME)
    return response


def enable_view(request, max_age):
    try:
        max_age = int(max_age) or None
    except ValueError:
        max_age = None
    next_url = QueryDict(request.META.get('QUERY_STRING')).get('next')
    if not is_link_legit(next_url):
        next_url = reverse('index')
    response = HttpResponseRedirect(next_url)
    if isinstance(request.user, NelUser) and not max_age:
        request.user.nsfw_allowed = True
        request.user.save()
    else:
        response.set_cookie(
            settings.KHAGANAT_NSFW_NAME,
            settings.KHAGANAT_NSFW_OK[0],
            max_age=max_age
        )
    return response


def warn_view(request):
    next_url = QueryDict(request.META.get('QUERY_STRING')).get('next') or '/'
    if not is_link_legit(next_url):
        next_url = '/'
    prev_url = QueryDict(request.META.get('QUERY_STRING')).get('prev')
    if not is_link_legit(prev_url):
        prev_url = None
    context = {
        'prev_url': prev_url,
        'go_home': True,
        'next_url': next_url,
        'is_authenticated': request.user.is_authenticated,
    }
    return render(request, 'nsfw/redirect_page.html', context=context)


def warn_msg(request, next_url=None):
    context = {
        'prev_url': None,
        'go_home': False,
        'next_url': next_url,
        'is_authenticated': request.user.is_authenticated,
    }
    ret = render_to_string(
        request,
        'nsfw/redirect_page.html',
        context=context
    )
    return ret


def redirect(request):
    dest = '{to_url}?next={next_url}'.format(
        to_url=reverse(warn_view),
        next_url=request.get_full_path()
    )
    return HttpResponseRedirect(dest)


def alert(request, next_url=None):
    context = {
        'next_url': next_url,
    }
    msg = render_to_string('nsfw/disabled_alert.html', context=context)
    messages.info(request, msg, extra_tags='safe')