import os
from PIL import Image
from django.db import models
from django.db.models.signals import post_save
from django.contrib.sitemaps import Sitemap
from django.dispatch import receiver
from django.urls import reverse
from django.apps import apps
from django.utils.html import format_html
from django.conf import settings
from django.template.defaultfilters import slugify

from photos.models import PhotoGallery, LuxImage, LuxImageSize
from photos.utils import resize_image
from utils.util import render_images, render_products, parse_video, markdown_to_html


def get_upload_path(self, filename):
    return "images/products/%s" % (filename)

class Brand(models.Model):
    name = models.CharField(max_length=200)
    slug = models.CharField(max_length=50)
    pub_date = models.DateTimeField(auto_now_add=True)
    
    def __str__(self):
        return self.name

class Product(models.Model):
    name = models.CharField(max_length=200)
    brand = models.ForeignKey(Brand, on_delete=models.CASCADE)
    slug = models.CharField(max_length=50)
    pub_date = models.DateTimeField()
    body_markdown = models.TextField(blank=True)
    body_html = models.TextField(null=True, blank=True)
    RETAILER = (
        (0, 'Amazon'),
        (1, 'REI'),
        (2, 'eBay'),
    )
    primary_offer_retailer = models.IntegerField(choices=RETAILER, default=0)
    primary_offer_url = models.CharField(max_length=400)
    primary_offer_price = models.IntegerField()
    secondary_offer_retailer = models.IntegerField(choices=RETAILER, default=0)
    secondary_offer_url = models.CharField(max_length=400, blank=True, null=True)
    secondary_offer_price = models.IntegerField(blank=True, null=True)
    rating = models.IntegerField()
    is_public = models.BooleanField(default=True)
    featured_image = models.ForeignKey(LuxImage, on_delete=models.CASCADE, null=True, blank=True)

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

    def __str__(self):
        return self.name

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

    @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_read_date().pk])
        except model.DoesNotExist:
            return ''

    def admin_thumbnail(self):
        return format_html('<img src="%s" width="100" style="width:100px" />' % (self.featured_image.get_thumbnail_url()))
    admin_thumbnail.short_description = 'Thumbnail'

    def get_full_name(self):
        return "%s %s" % (self.brand.name, self.name)
    
    def save(self, *args, **kwargs):
        md = render_images(self.body_markdown)
        prods = render_products(md)
        self.body_html = markdown_to_html(prods)
        super(Product, self).save()


@receiver(post_save, sender=Product)
def post_save_events(sender, update_fields, created, instance, **kwargs):
    #base_path = "%s/%s/" % (settings.MEDIA_ROOT, "/".join(str(i) for i in instance.image.name.split('/')[:-1]))
    #filename, file_extension = os.path.splitext(instance.image.path)
    #img = Image.open(instance.image.path)
    #resize_image(img, None, 160, 78, base_path, "%s_tn%s" % (filename.split('/')[-1], file_extension))
    #resize_image(img, None, 650, 78, base_path, "%s_small%s" % (filename.split('/')[-1], file_extension))
    pass