from django.utils.decorators import method_decorator
from django.shortcuts import redirect
from django.contrib import messages
from django.contrib.auth import REDIRECT_FIELD_NAME
from django.contrib.auth.decorators import login_required
from django.contrib.auth.views import redirect_to_login, SuccessURLAllowedHostsMixin
from django.conf import settings
from django.contrib.auth.mixins import UserPassesTestMixin
from django.urls import reverse_lazy
from django.utils.http import url_has_allowed_host_and_scheme

class SuperUserRequiredMixin(UserPassesTestMixin):
    def test_func(self):
        try:
            return self.request.user.is_superuser
        except:
            return False

    def get_login_url(self):
        return reverse_lazy("localauth:login")

class LoginRequiredMixin(UserPassesTestMixin):
    def test_func(self):
        try:
            return self.request.user.is_authenticated
        except:
            return False

    def get_login_url(self):
        return reverse_lazy("localauth:login")

class MultiPermissionMixin:
    MIXINS = []

    def dispatch(self, request, *args, **kwargs):
        for mixin in self.MIXINS:
            if not mixin.test_func(self):
                return redirect_to_login(request.get_full_path(), mixin.get_login_url(self), REDIRECT_FIELD_NAME)

        return super().dispatch(request, *args, **kwargs)

class RedirectToNextMixin(SuccessURLAllowedHostsMixin):
    def get_redirect_url(self):
        """Return the user-originating redirect URL if it's safe."""
        redirect_to = self.request.POST.get(
            REDIRECT_FIELD_NAME,
            self.request.GET.get(REDIRECT_FIELD_NAME, '')
        )
        url_is_safe = url_has_allowed_host_and_scheme(
            url=redirect_to,
            allowed_hosts=self.get_success_url_allowed_hosts(),
            require_https=self.request.is_secure(),
        )
        return redirect_to if url_is_safe else ''