import datetime
from django.contrib.gis.db import models
from django import forms
from django.urls import reverse
from django.apps import apps

from utils.util import render_images, markdown_to_html

from locations.models import Location, CheckIn


def get_upload_path(self, filename):
    return "audio/%s/%s" % (datetime.datetime.today().strftime("%Y"), filename)


class Audio(models.Model):
    title = models.CharField(max_length=200)
    subtitle = models.CharField(max_length=200, blank=True)
    slug = models.SlugField(unique_for_date='pub_date', blank=True)
    body_html = models.TextField(blank=True)
    body_markdown = models.TextField(blank=True)
    pub_date = models.DateTimeField(default=datetime.datetime.now)
    mp3 = models.FileField(blank=True, null=True, upload_to=get_upload_path)
    ogg = models.FileField(blank=True, null=True, upload_to=get_upload_path)
    point = models.PointField(blank=True, null=True)
    location = models.ForeignKey(Location, on_delete=models.CASCADE, blank=True, null=True)

    class Meta:
        ordering = ('-pub_date',)
        get_latest_by = 'pub_date'

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse("prompt:detail", kwargs={"slug": self.slug})

    @property
    def get_previous_published(self):
        return self.get_previous_by_pub_date(status__exact=1)

    @property
    def get_previous_admin_url(self):
        n = self.get_previous_by_pub_date()
        return reverse('admin:%s_%s_change' % (self._meta.app_label,  self._meta.model_name),  args=[n.id])

    @property
    def get_next_published(self):
        return self.get_next_by_pub_date(status__exact=1)

    @property
    def get_next_admin_url(self):
        model = apps.get_model(app_label=self._meta.app_label, model_name=self._meta.model_name)
        try:
            return reverse('admin:%s_%s_change' % (self._meta.app_label,  self._meta.model_name),  args=[self.get_next_by_pub_date().pk])
        except model.DoesNotExist:
            return ''

    def get_type(self):
        return str(self.__class__.__name__)

    def save(self, *args, **kwargs):
        md = render_images(self.body_markdown)
        self.body_html = markdown_to_html(md)
        if not self.point:
            self.point = CheckIn.objects.latest().point
        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(Audio, self).save(*args, **kwargs)