import datetime
from django.contrib.gis.db import models
from django.contrib.syndication.feeds import Feed
from django.contrib.sitemaps import Sitemap
from django.utils.encoding import force_unicode
from django.conf import settings

from tagging.fields import TagField
from tagging.models import Tag

from locations.models import Location,Region

class Photo(models.Model):
    description = models.TextField(blank=True, null=True)
    title = models.CharField(blank=True, max_length=300)
    pub_date = models.DateTimeField()
    tags = TagField()
    exif_aperture = models.CharField(max_length=50, blank=True, null=True)
    exif_make = models.CharField(max_length=50, blank=True, null=True)
    exif_model = models.CharField(max_length=50, blank=True, null=True)
    exif_shutter = models.CharField(max_length=50, blank=True, null=True)
    exif_iso = models.CharField(max_length=50, blank=True, null=True)
    exif_lens = models.CharField(max_length=50, blank=True, null=True)
    exif_date = models.DateTimeField()
    """Flickr Specific Stuff"""
    flickr_id = models.CharField(max_length=300) #varchar since Flickr ids are larger than than integerfield can handle and BigIntegerField gets weird in Postgres.
    flickr_owner = models.CharField(max_length=20)
    flickr_server = models.IntegerField()
    flickr_farm = models.IntegerField()
    flickr_secret = models.CharField(max_length=50)
    flickr_originalsecret = models.CharField(max_length=50)
    lon = models.FloatField('Longitude',help_text="Longitude of centerpoint",null=True)
    lat = models.FloatField('Latitude',help_text="Latitude of centerpoint",null=True)
    location = models.ForeignKey(Location, null=True)
    region = models.ForeignKey(Region, null=True)
    
    

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


    def admin_thumbnail(self):
        return force_unicode('<a href="%s"><img src="%s"></a>' % \
                (self.get_absolute_url(), self.get_small_square_url()))
    admin_thumbnail.allow_tags = True
    admin_thumbnail.short_description = 'Thumbnail'
    
            
    def __unicode__(self):
        return self.title
        
    def get_absolute_url(self):
        return "/photo/%s/" % (self.id)
        
    def get_model_name(self):
        return 'photo'
        
    def get_small_square_url(self):
        return self.get_pic_url(size="small_square")
        
    def get_large_url(self):
        return self.get_pic_url(size="large")
    
    def get_small_url(self):
        return self.get_pic_url(size="small")
    
    def get_medium_url(self):
        return self.get_pic_url(size="medium")
    
    def get_original_url(self):
        #return self.get_pic_url(size="original")
        return "http://farm%s.static.flickr.com/%s/%s_%s_o.jpg" % (self.flickr_farm, self.flickr_server, self.flickr_id, self.flickr_originalsecret)
    
    def get_pic_url(self, size='small'):
        # small_square=75x75
        # thumb=100 on longest side
        # small=240 on longest side
        # medium=500 on longest side
        # large=1024 on longest side
        # original=duh
    
        base_url = "http://static.flickr.com"
        size_char='s'  # default to small_square
        
        if size == 'small_square':
            size_char='_s'
        elif size == 'thumb':
            size_char='_t'
        elif size == 'small':
            size_char='_m'
        elif size == 'medium':
            size_char=''
        elif size == 'large':
            size_char='_b'
        elif size == 'original':
            size_char='_o'
    
        return "http://farm%s.static.flickr.com/%s/%s_%s%s.jpg" % (self.flickr_farm, self.flickr_server, self.flickr_id, self.flickr_secret, size_char)
        
    def get_tumble_image(self):
        return "%s/crops/%s/%s.jpg" %(settings.IMAGES_URL, self.pub_date.strftime("%Y/%b").lower(), self.id)
        
    def get_tags(self):
        return Tag.objects.get_for_object(self)
                
    def get_previous_published(self):
        return self.get_previous_by_pub_date()
        
    def get_next_published(self):
        return self.get_next_by_pub_date()
    
    def comment_period_open(self):
        return self.enable_comments and datetime.datetime.today() - datetime.timedelta(30) <= self.pub_date
    """    
    def save(self):
        self.lat = self.gps.split(',')[0]
        self.lon = self.gps.split(',')[1]
        super(Photo, self).save()
    """
class PhotoGallery(models.Model):
    set_id = models.CharField(blank=True, max_length=300)
    set_title = models.CharField(blank=True, max_length=300)
    set_desc = models.TextField(blank=True, null=True)
    set_slug = models.CharField(blank=True, max_length=300)
    primary = models.CharField(blank=True, max_length=300)
    photos = models.ManyToManyField(Photo)
    location = models.ForeignKey(Location, null=True)
    region = models.ForeignKey(Region, null=True)
    
    class Meta:
        ordering = ('id',)
        
    def __unicode__(self):
        return self.set_title
        
    def get_main_image(self):
        return "%sgallery_thumbs/%s.jpg" % (settings.IMAGES_URL, self.id)
    
    def get_absolute_url(self):
        return "/photos/album/%s/" % (self.id)
          
   
class PhotoSitemap(Sitemap):
    changefreq = "never"
    priority = 0.7

    def items(self):
        return Photo.objects.all()

    def lastmod(self, obj):
        return obj.pub_date