# -*- coding: utf-8 -*-
from datetime import date
from django.db import models
from django.utils import translation
from django.utils.translation import ugettext_lazy as _
from django.contrib.contenttypes import generic
from django.db.models.signals import post_save, pre_save
from hvad.models import TranslatableModel, TranslatedFields
from bitfield import BitField
from manager import CountryManager, AreaManager
from directories.models import Language, Currency
from city.models import City
from functions.signal_handlers import post_save_handler, pre_save_handler


from service.models import Service
from functions.db import db_table_exists
# check if table exist and create flags if true
#flags = [str(item.url) for item in Service.objects.all()] if db_table_exists('service_service') else []
flags = ['catalog', 'translator', 'participation', 'remote', 'tickets', 'visit', 'buildstand']


class Area(TranslatableModel):
    """
    Store information about geographical zones
    """
    translations = TranslatedFields(
        name=models.CharField(verbose_name=_(u'Название'), max_length=255),
    )
    objects = AreaManager()

    class Meta:
        ordering = ['translations__name']

    def __unicode__(self):
        return self.lazy_translation_getter('name', unicode(self.pk))

    def countries(self):
        """
        returns countries of current area
        """
        lang = translation.get_language()
        return Country.objects.select_related('exposition_country')\
            .filter(exposition_country__country__isnull=False, translations__language_code=lang, area=self)\
            .distinct().order_by('translations__name')

    def expos(self):
        """
        return expos that occur in current area
        """
        from exposition.models import Exposition
        countries = self.countries()
        return Exposition.objects.filter(country__in=countries)

    def get_sub_categories(self):
        """
        returns list with countries data that connected to current area
        uses in search
        """
        objects = [{'text': item.name, 'id': item.id, 'name': 'co', 'sub': True} for item in self.countries()]
        return objects

    def get_parent(self):
        """
        returns empty dict, cause area has no parents
        uses in search
        """
        return {}

    def get_index_text(self):
        """
        returns string of names in all languages for indexing it in search engine
        """
        translation.activate('ru')
        translations = self.translations.all()
        names = ' '.join([tr.name for tr in translations])
        return names


class Country(TranslatableModel):
    """
    Stores information about countries
    area- parent, city - child in search
    """
    objects = CountryManager()
    catalog = '/country/'
    services = BitField(flags=flags)
    url = models.SlugField(verbose_name=_(u'Url'), unique=True)
    old_url = models.CharField(verbose_name=_(u'Старый урл'), unique=True, max_length=55)
    # inflect name for russian language. example- в Росии
    inflect = models.CharField(verbose_name=_(u'Склонение'), max_length=255, blank=True)
    area = models.ForeignKey(Area, verbose_name=_(u'Географическая зона'))
    logo = models.ImageField(verbose_name=_(u'Logo'), upload_to='country/logo/', blank=True, max_length=255)
    big_cities = models.ManyToManyField(City, verbose_name=_(u'Большые города'), blank=True, null=True, related_name='cities')
    capital = models.ForeignKey(City, verbose_name=_(u'Столица'), blank=True, null=True, on_delete=models.PROTECT, related_name='capital')
    language = models.ManyToManyField(Language, blank=True, null=True)
    currency = models.ManyToManyField(Currency, verbose_name=_(u'Валюта'), blank=True, null=True)
    population = models.PositiveIntegerField(verbose_name=_(u'Население'), blank=True, null=True)
    teritory = models.PositiveIntegerField(verbose_name=_(u'Територия'), blank=True, null=True)
    timezone = models.FloatField(verbose_name=_(u'Часовой пояс'), blank=True, null=True)
    phone_code = models.PositiveIntegerField(verbose_name=_(u'Тел. Код страны'), blank=True, null=True)
    time_delivery = models.PositiveSmallIntegerField(blank=True, null=True)
    latitude = models.FloatField(verbose_name=_(u'Широта'), blank=True, null=True)
    longitude = models.FloatField(verbose_name=_(u'Долгота'), blank=True, null=True)
    created = models.DateTimeField(auto_now_add=True)
    modified = models.DateTimeField(auto_now=True)
    country_code = models.CharField(verbose_name=_(u'Код страны(Alpha2)'), max_length=2)
    # connection with FileModel by ContentType
    files = generic.GenericRelation('file.FileModel',content_type_field='content_type', object_id_field='object_id')
    translations = TranslatedFields(
        name=models.CharField(max_length=255),
        description=models.TextField(blank=True),
        transport=models.TextField(blank=True),
        rules=models.TextField(blank=True),
        documents=models.TextField(blank=True),
        consulate=models.TextField(blank=True),
        #-----meta data
        title=models.CharField(max_length=255),
        descriptions=models.CharField(max_length=255),
        keywords=models.CharField(max_length=255),
    )

    class Meta:
        ordering = ['translations__name']

    def __unicode__(self):
        return self.lazy_translation_getter('name', unicode(self.pk))

    def get_events(self):
        """
        returns nearest expos in this country
        """
        now = date.today()
        from exposition.models import Exposition
        return Exposition.objects.filter(data_begin__gte=now, country=self).order_by('data_begin')[:3]

    def get_places(self):
        from place_exposition.models import PlaceExposition
        return PlaceExposition.objects.filter(country=self)[:3]

    def get_permanent_url(self):
        return self.catalog+self.url

    def expositions_number(self):
        from exposition.models import Exposition
        return Exposition.objects.filter(country=self).count()

    def conferences_number(self):
        from conference.models import Conference
        return Conference.objects.filter(country=self).count()

    def active_cities(self):
        result = list(set(City.used.active_qs().filter(country=self)))
        result.sort(key=lambda x: x.name)
        return result

    def get_sub_categories(self):
        objects = [{'text': item.name, 'id': item.id, 'name': 'ci', 'sub': False} for item in self.active_cities()]
        return objects

    def get_parent(self):
        parent = {'text': self.area.name, 'id': self.area.id, 'name': 'area'}
        return parent

    def get_index_text(self):
        """
        returns string of names in all languages for indexing it in search engine
        """
        translation.activate('ru')
        translations = self.translations.all()
        names = ' '.join([tr.name for tr in translations])
        return names


pre_save.connect(pre_save_handler, sender=Country)
post_save.connect(post_save_handler, sender=Country)