# -*- coding: utf-8 -*-

from django.db import models
from django.contrib.auth.models import User
from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes.generic import GenericForeignKey
from django.utils.translation import ugettext_lazy as _


class Notice(models.Model):
    """
    model 'Notice' to record and display notice
    """
    title = models.CharField(_("Title"), max_length=100)
    pubtime = models.DateTimeField(_("Publish time"), auto_now_add=True)
    category = models.ForeignKey('NoticeCategory', verbose_name=_("Category"))
    publisher = models.ForeignKey(User, verbose_name=_("Publisher"))
    is_important = models.BooleanField(_("Is important"), default=False)
    contents = models.TextField(_("Contents"))
    # NoticeAttachments to deal with attachments

    class Meta:
        verbose_name = _('notice')
        verbose_name_plural = _('notices')
        ordering = ['-pubtime', 'id']

    def __unicode__(self):
        return u'Notice at %s' % self.pubtime.isoformat()


class NoticeCategory(models.Model):
    """
    model 'NoticeCategory' to provide category selections for 'Notice'
    """
    category_name = models.CharField(_("Category name"), max_length=100)
    created_time = models.DateTimeField(_("Created time"), auto_now_add=True)

    class Meta:
        verbose_name = _('notice category')
        verbose_name_plural = _('notice categories')

    def __unicode__(self):
        return u'NoticeCategory : %s' % self.category_name


class NoticeAttachment(models.Model):
    attachment = models.FileField(upload_to='notice/attachments',
            verbose_name=_("Attachment"))
    content_type = models.ForeignKey(ContentType, verbose_name=_("Content type"))
    object_id = models.PositiveIntegerField(_("Object ID"))
    content_object = GenericForeignKey("content_type", "object_id")