from datetime import datetime, date
import urllib

from django.utils import simplejson as json
from django.db import models
from django.contrib.auth.models import User
from django.utils.timezone import now, utc

from reddit.api import Comment


class RedditAccount(models.Model):
    """
    Represents a User ID on Reddit

    This model can be populated by API update:

    >>> from reddit.models import RedditAccount
    >>> mod = RedditAccount()
    >>> mod.username = 'nik_doof'
    >>> mod.api_update()
    >>> mod.reddit_id
    u'1axok'
    """

    user = models.ForeignKey(User, blank=True, null=True)

    username = models.CharField("Reddit Username", max_length=32, blank=False, unique=True)
    reddit_id = models.CharField("Reddit ID", max_length=32, help_text="Reddit's unique id for this user")

    link_karma = models.IntegerField("Link Karma", help_text="Number of link karma")
    comment_karma = models.IntegerField("Comment Karma", help_text="Number of comment karma")
    validated = models.BooleanField("Validated", help_text="Indicates if the user has been validated")

    date_created = models.DateTimeField("Date Created")
    last_update = models.DateTimeField("Last Update from API")

    def api_update(self):
        try:
            jsondoc = json.load(urllib.urlopen("http://reddit.com/user/%s/about.json" % self.username))
        except:
            raise self.DoesNotExist

        if 'error' in jsondoc:
            raise self.DoesNotExist
        
        data = jsondoc['data']
        
        self.link_karma = int(data['link_karma'])
        self.comment_karma = int(data['comment_karma'])
        self.reddit_id = unicode(data['id'], 'utf-8')

        self.date_created = datetime.fromtimestamp(data['created_utc']).replace(tzinfo=utc)
        self.last_update = now()

    def recent_posts(self):
        """ Returns the first page of posts visible on the user's profile page """

        try:
            jsondoc = json.load(urllib.urlopen("http://reddit.com/user/%s.json" % self.username))
        except:
            raise self.DoesNotExist
        
        posts = []
        for item in jsondoc['data']['children']:
            if item['kind'] == 't1':
                posts.append(Comment(item['data']))
            elif item['kind'] == 't3':
                posts.append(item['data'])

        return posts

    @property
    def is_valid(self):
        if not self.date_created:
            return False

        # Account 3 months old?
        if (date.today() - self.date_created.date()).days >= 90:
            return True

        # Account created after 9/2/10 and before 13/2/10
        if self.date_created.date() >= date(2010, 2, 9) and self.date_created.date() <= date(2010, 2, 13):
            return True

        return False


    class Meta:
        app_label = 'reddit'
        ordering = ['username']
        verbose_name = 'Reddit Account'
        verbose_name_plural = 'Reddit Accounts'

    def __unicode__(self):
        return self.username