# -*- coding: utf-8 -*-
from datetime import date
from django.db import models
from django.db.models.signals import post_save, pre_save
from hvad.models import TranslatableModel, TranslatedFields, TranslationManager
from bitfield import BitField
from sorl.thumbnail import ImageField
# models
from directories.models import Iata
from service.models import Service
from exposition.models import Exposition
from place_exposition.models import PlaceExposition
from organiser.models import Organiser
# custom functions
from functions.db import db_table_exists
from functions.signal_handlers import post_save_handler
from functions.models_methods import ExpoManager

#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 []


class City(TranslatableModel):
    """
    Create City model

    Uses hvad.TranslatableModel which is child of django.db.models class

    """
    objects = ExpoManager()
    catalog = '/city/'

    services = BitField(flags=flags)

    url = models.SlugField(unique=True)
    #
    old_url = models.CharField(max_length=55)
    inflect = models.CharField(max_length=255, blank=True)
    #relations
    country = models.ForeignKey('country.Country', null=True, on_delete=models.PROTECT, related_name='cities')
    code_IATA = models.ForeignKey(Iata, blank=True, null=True)

    population = models.PositiveIntegerField(blank=True, null=True)
    phone_code = models.PositiveIntegerField(blank=True, null=True)
    #translated fields
    translations = TranslatedFields(
        name = models.CharField(max_length=50),
        region = models.CharField(max_length=255),
        transport = models.TextField(blank=True),
        description = models.TextField(blank=True),
        famous_places = models.TextField(blank=True),
        shoping = models.TextField(blank=True),
        #-----meta
        title = models.CharField(max_length=255),
        descriptions = models.CharField(max_length=255),
        keywords = models.CharField(max_length=255),
    )
    # fields saves information about creating and changing model
    created = models.DateTimeField(auto_now_add=True)
    modified = models.DateTimeField(auto_now=True)

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

    def get_hotels(self):
        return self.hotels.all()[:4]

    def get_events(self):
        now = date.today()
        return Exposition.objects.filter(data_begin__gte=now, city=self).order_by('data_begin')[:3]

    def get_places(self):
        return PlaceExposition.objects.filter(city=self)[:3]

    def get_organisers(self):
        return Organiser.objects.filter(city=self)

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

    def events_catalog(self):
        return Exposition.catalog+'city-%s'%self.url

    def places_catalog(self):
        return PlaceExposition.catalog+'city-%s'%self.url

    def expositions_number(self):

        return len(Exposition.objects.filter(city=self.id))

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

    def get_sub_categories(self):
        return []





class Hotel(TranslatableModel):
    url = models.URLField(max_length=255)
    city = models.ForeignKey(City, related_name='hotels')

    ranking = models.FloatField(blank=True, null=True)
    hotel_class = models.CharField(max_length=10, blank=True)
    latitude = models.FloatField(blank=True, null=True)
    longitude = models.FloatField(blank=True, null=True)
    photo = ImageField(upload_to='hotels')

    translations = TranslatedFields(
        name = models.CharField(max_length=255, blank=True),
        address = models.CharField(max_length=255, blank=True)
    )

post_save.connect(post_save_handler, sender=City)
post_save.connect(post_save_handler, sender=Hotel)