# -*- coding: utf-8 -*-
from django.contrib.syndication.views import Feed
from django.shortcuts import get_object_or_404
from django.db import models
from django.utils.translation import ugettext as _

from exposition.models import Exposition
import copy
from theme.models import Theme
from country.models import Country
from city.models import City

from hvad.models import TranslatableModel, TranslatedFields

# ----------------------- RSS -------------------------- #

EXPO_ON_PAGE = 10

# nearest expositions at all

class LatestExpositions(Feed):
    title = _(u"Ближайшие выставки на expomap.ru")
    link = '/rss/latest/'
    description = _(u'Подписывайтесь на наш RSS-канал')

    def items(self):
        return Exposition.enable.upcoming()[:EXPO_ON_PAGE]

    def item_title(self, item):
        return item.name

    def item_description(self, item):
        return item.main_title

    def item_link(self, item):
        return '/expo/%s/'%item.url

NUM_ITEMS_ON_PAGE = 20


class CountryFeeds(Feed):
    description_template = '/rss/country_feeds/'

    def get_object(self, request, slug):
        return get_object_or_404(Country, url=slug)

    def title(self, obj):
        return _(u"Ближайшие выставки %(obj)s:") % {'obj': obj.inflect}

    def link(self,obj):
        return obj.get_permanent_url()

    def item_description(self, obj):
        return obj.main_title

    def items(self, obj):
        return Exposition.enable.upcoming().filter(country=obj)[:NUM_ITEMS_ON_PAGE]


class CityFeeds(Feed):
    description_template = '/rss/city_feeds/'

    def get_object(self, request, slug):
        return get_object_or_404(City, url=slug)

    def title(self, obj):
        return _(u"Ближайшие выставки в %(obj)s: ") % {'obj': obj.inflect}

    def link(self,obj):
        return obj.get_permanent_url()

    def item_description(self, obj):
        return obj.main_title

    def items(self, obj):
        return Exposition.enable.upcoming().filter(city = obj)[:NUM_ITEMS_ON_PAGE]


class ThemeFeeds(Feed):
    description_template = '/rss/theme_feeds/'

    def get_object(self, request, slug):
        return get_object_or_404(Theme, url=slug)

    def title(self, obj):
        return _(u"Ближайшие выставки %(obj)s: ") % {'obj': obj.inflect}

    def link(self,obj):
        return obj.url

    def item_description(self, obj):
        return obj.main_title

    def items(self, obj):
        return Exposition.enable.upcoming().filter(theme = obj)[:NUM_ITEMS_ON_PAGE]

# ------------------------ Page model --------------------------- #
from django.conf import settings
from django.core.urlresolvers import reverse

class Page(TranslatableModel):

    url = models.SlugField(unique=True)
    translations = TranslatedFields(
        h1 = models.CharField(max_length=255),
        body = models.TextField(),
        # meta
        title = models.CharField(max_length=255, blank=True),
        descriptions = models.CharField(max_length=255, blank=True),
        keywords = models.CharField(max_length=255, blank=True),
    )
    created = models.DateTimeField(auto_now_add=True)
    modified = models.DateTimeField(auto_now=True)

    def get_absolute_url(self):
        return reverse('page_view', args=[self.url])

    def __init__(self, *args, **kwargs):
        super(Page, self).__init__(*args, **kwargs)
        self.cache_fields = ['h1', 'body','title', 'description', 'keywords']
        self.var_cache = {var: copy.copy(getattr(self, var)) for var in self.cache_fields}
        self.is_new = True

    def save(self, *args, **kwargs):
        super(Page,self).save(*args, **kwargs)
        self.initial_language = 'ru'

        new_values = {field: getattr(self, field) for field in self.cache_fields}
        langs = [code for code, _ in settings.LANGUAGES]
        if self.is_new:
            for lang in langs:
                if lang not in self.get_available_languages():
                    self.translate(lang)
                    for key, value in new_values.items():
                        setattr(self, key, value)
                    self.save_translations(self)
        else:
            translations = {obj.language_code:obj for obj in list(self.translations.all())}
            for lang in langs:
                if lang is not self.initial_language:
                    tr = translations[lang]
                    for key, value in new_values.items():
                        #if u'%s' % getattr(self, key) is u'' or getattr(self, key) is u'%s' % self.var_cache[key]:
                        setattr(tr, key, value)
                    tr.save()

        self.lazy_translation_getter(self.initial_language)
        self.var_cache = {var: copy.copy(getattr(self, var)) for var in self.cache_fields}
        self.is_new = False
        return self

    def __unicode__(self):
        return self.url