import datetime 
import re
from django.contrib.gis.db import models
from django.utils import timezone
from bs4 import BeautifulSoup
import requests

class Item(models.Model):
    name = models.CharField(max_length=200)
    purchase_price = models.IntegerField()
    url = models.CharField(max_length=200)
    currently_own = models.BooleanField(blank=True, default=False)
    sold = models.BooleanField(blank=True, default=False)
    sale_price = models.IntegerField()
    
    def save(self, **kwargs):
        super(Item, self).save()

    def __str__(self):
        return self.name
    

class TrackedItem(models.Model):
    title = models.CharField(max_length=200)
    url = models.CharField(max_length=200)
    DESIRE = (
        (0, '1'),
        (1, '2'),
        (2, '3'),
        (3, '4'),
        (4, '5'),
    )
    amount_desired = models.IntegerField(choices=DESIRE, default=0)
    date_ending = models.DateTimeField(default=timezone.now)
    
    class Meta:
        ordering = ('date_ending', 'amount_desired')
        get_latest_by = 'date_ending'

    @property
    def get_latest_price(self):
        return self.price_set.latest().price

    def admin_link(self):
        return force_text('<a href="%s">View Auction page</a>' % (self.url))
    admin_link.allow_tags = True
    admin_link.short_description = 'Link'
    
    def __str__(self):
        return self.title

    def save(self, **kwargs):
        super(TrackedItem, self).save()


class Price(models.Model):
    date = models.DateTimeField(blank=True)
    price = models.DecimalField(max_digits=6, decimal_places=2)
    item = models.ForeignKey(TrackedItem)
    
    class Meta:
        ordering = ('-date',)
        get_latest_by = 'date'

    def __str__(self):
        return str(self.date)
    
    def save(self, **kwargs):
        if not self.pk:
            self.date = datetime.datetime.now()
        super(Price, self).save()


def update_tracked_item_price(item):
    r = requests.get(item.url)
    soup = BeautifulSoup(r.text, "lxml")
    numbers = re.compile('\d+(?:\.\d+)?')
    price = soup.find(itemprop="price").get_text()
    price = numbers.findall(price)[0]
    l, created = Price.objects.get_or_create(
        price=price,
        item=item
    )