# -*- coding: utf-8

from django.contrib.contenttypes.models import ContentType
from django.core.urlresolvers import reverse
from django.http import HttpResponseRedirect
from django.shortcuts import get_object_or_404

import flash

import variables


class Permissions(object):
    def __init__(self, model, field=None, delete=None, edit=None, create=None, owner_field='user'):
        self.model = model
        self.field = field
        self.delete = delete
        self.edit = edit
        self.create = create
        self.owner_field = owner_field
        self.content_type = ContentType.objects.get_for_model(self.model)
        self.activation = getattr(variables, "ACTIVATION", None)
        self.notice_handler = getattr(variables, "NOTICE_HANDLER")
        self.error_handler = getattr(variables, "ERROR_HANDLER")
    
    
    def __call__(self, func):
        self.func = func
        return self.decorate
            
        
    def decorate(self, request, *args, **kwargs):
        self.request = request
        self.args = args
        self.kwargs = kwargs
        self.is_authorized()
        self.is_banned()
        self.is_moderator()
        if self.create:
            return self._create()
        self.obj = get_object_or_404(self.model, **{self.field: self.args[0]})
        if self.delete:
            return self._delete()
        if self.edit:
            return self._edit()
        return self.func(self.request, *self.args, **self.kwargs)
        
    def _redirect_url(self):
        #redirect_url = self.request.META['HTTP_REFERER']
        #if referer == self.request.path:
        redirect_url = "/"
        return redirect_url
        
    def is_authorized(self):
        if self.activation and not self.request.user.is_active:
            self.error_handler(u"Please activate your account")
            return HttpResponseRedirect(self._redirect_url())
        if not self.request.user.is_authenticated():
            self.error_handler(u"Please authorize")
            return HttpResponseRedirect(self._redirect_url())            
    
    def is_banned(self):
        if self.content_type in self.request.user.ban.sections.all():
            self.error_handler(u"You are banned from this section")
            return HttpResponseRedirect(self._redirect_url())
        
    def is_moderator(self):
        if self.content_type in self.request.user.moderator.sections.all():
            return self.func(self.request, *self.args, **self.kwargs)
        
    def _create(self):
        return self.func(self.request, *self.args, **self.kwargs)
    
    def _delete(self):
        if getattr(self.obj, self.owner_field) == self.request.user:
            return self.func(self.request, *self.args, **self.kwargs)
        self.notice_handler(u"You can't delete others records")
        return HttpResponseRedirect(self._redirect_url())
        
    def _edit(self):
        if getattr(self.obj, self.owner_field) == self.request.user:
            return self.func(self.request, *self.args, **self.kwargs)
        self.notice_handler(u"You can't edit others records")
        return HttpResponseRedirect(self._redirect_url())