# -*- coding: utf-8 -*-
from django import forms
from django.contrib.redirects.models import Redirect
from django.conf import settings
from django.contrib.redirects.admin import RedirectAdmin
from django.utils.translation import ugettext as _


class RedirectForm(forms.ModelForm):
    verbose = _(u'Создание/редактирование редиректа')
    class Meta:
        model = Redirect
        fields = ['old_path', 'new_path']

    def save(self, commit=True):
        obj = super(RedirectForm, self).save(commit=False)
        obj.site_id = settings.SITE_ID
        if commit:
            obj.save()
        return obj


class NewUrlForObjectForm(forms.Form):
    verbose = _(u'Обновление URL и cоздание редиректа')

    old_url = forms.CharField(label=_(u'Текущая ссылка'))
    new_url = forms.CharField(label=_(u'Новая ссылка'))

    def __init__(self, *args, **kwargs):
        self.instance = kwargs.pop('instance', None)
        super(NewUrlForObjectForm, self).__init__(*args, **kwargs)

    @property
    def exist(self):
        return Redirect.objects.filter(old_path=self.instance.get_permanent_url()).exists()

    def clean_new_url(self):
        if self.cleaned_data['new_url'] == self.cleaned_data['old_url']:
            raise forms.ValidationError(
                _(u'Старый и новый URL совпадают.'),
                code='invalid'
            )
        return self.cleaned_data['new_url']

    def save(self):
        old_path = self.instance.get_permanent_url()
        self.instance.url = self.cleaned_data['new_url']
        self.instance.save()
        obj, created = Redirect.objects.get_or_create(
            old_path=old_path,
            defaults={
                'new_path': self.instance.get_permanent_url(),
                'site_id': settings.SITE_ID,
                })
        return self.instance