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 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
        
        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'])
        self.last_update = datetime.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