import datetime
from django.contrib.gis.db import models
from django.template.defaultfilters import slugify
from django import forms
from django.conf import settings
from locations.models import Location

# http://freewisdom.org/projects/python-markdown/
import markdown


class Note(models.Model):
    slug = models.SlugField(unique_for_date='date_created', blank=True)
    date_created = models.DateTimeField('Date', blank=True)
    date_last_updated = models.DateTimeField('Date', blank=True)
    point = models.PointField()
    location = models.ForeignKey(Location, null=True, blank=True)
    body_html = models.TextField(blank=True)
    body_markdown = models.CharField('Note', max_length=450)

    def __str__(self):
        return self.slug

    def get_absolute_url(self):
        return '/notes/%s/%s' % (self.date_created.strftime("%Y/%b").lower(), self.slug)

    @property
    def state(self):
        return self.location.state

    @property
    def country(self):
        return self.location.state.country

    @property
    def region(self):
        return self.location.state.country.lux_region

    @property
    def longitude(self):
        '''Get the site's longitude.'''
        return self.point.x

    @property
    def latitude(self):
        '''Get the site's latitude.'''
        return self.point.y

    def save(self):
        self.body_html = markdown.markdown(self.body_markdown, extensions=['extra'], safe_mode=False)
        self.date_last_updated = datetime.datetime.now()
        if not self.date_created:
            self.date_created = datetime.datetime.now()
        if not self.slug:
            self.slug = slugify(self.body_markdown)[:20]
        try:
            self.location = Location.objects.filter(geometry__contains=self.point).get()
        except Location.DoesNotExist:
            raise forms.ValidationError("There is no location associated with that point, add it:  %sadmin/locations/location/add/" % (settings.BASE_URL))
        super(Note, self).save()