# -*- coding: utf-8 -*-
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
# models
from directories.models import Iata
from service.models import Service
# 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()
    services = BitField(flags=flags)

    url = models.SlugField(unique=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)




post_save.connect(post_save_handler, sender=City)