from django.db import models
from django.contrib.auth.models import User
from saudade.common.help import markdown
from datetime import datetime

# Create your models here.
class Tag(models.Model):
    name = models.CharField(max_length=20)
    desc = models.TextField('Description', help_text=markdown)
    title = models.CharField('Title text', max_length=50, help_text="title text for tag link")
    slug = models.SlugField(prepopulate_from=('title',), help_text="slug for tag in url")

    class Admin:
        list_display = ('title', 'slug')
        search_fields = ('title', 'desc')
        list_filter = ('title',)

    class Meta:
        ordering = ['name'] 

    def __unicode__(self):
        return "%s (%s)" % (self.name, self.title)

    def get_link(self):
        return "<a href='%s' title=\"%s\">%s</a>" % (self.get_absolute_url(), self.title.replace('"', '\\"') , self.name)

    def get_absolute_url(self):
        return "/blog/tags/%s/" % (self.slug)

    def get_admin_url(self):
        return "/admin/blog/tag/%d/" % (self.id)

class TagGroup(models.Model):
    name = models.CharField(max_length=20)
    desc = models.TextField('Description', help_text=markdown)
    title = models.CharField('Title text', max_length=50, help_text="title tag for tag group")
    slug = models.SlugField(prepopulate_from=('title',), help_text="slug for tag group")
    tags = models.ManyToManyField(Tag)

    def __unicode__(self):
        return "%s (%s)" % (self.name, self.title)

    def get_link(self):
        return "<a href='%s' title='%s'>%s</a>" % (self.get_absolute_url(), self.title, self.name)

    def get_absolute_url(self):
        return "/blog/categories/%s/" % (self.slug)

class Post(models.Model):
    title = models.CharField(max_length=250)
    body = models.TextField(help_text=markdown)
    tags = models.ManyToManyField(Tag)
    summary = models.TextField(help_text=markdown, blank=True)
    author = models.ForeignKey(User)
    slug = models.SlugField(prepopulate_from=('title',), help_text="prepopulated from the title")
    pub_date = models.DateTimeField('Date published', default=datetime.now())
    # FIXME: this is a huge mistake;  rename this field 'published'
    is_published = models.BooleanField('Publish this post?', default=True)
    enable_comments = models.BooleanField(default=True)

    class Admin:
        fields = (
            ('Blog post', {'fields': ('title', 'slug', 'body')}),
            ('Publishing data', {'fields': ('author', 'is_published', 'enable_comments', 'pub_date', 'tags')}),
            )
        list_display = ('title', 'pub_date', 'is_published')
        search_fields = ('title', 'slug', 'body', 'summary')
        list_filter = ('pub_date', 'is_published', 'enable_comments')

    class Meta:
        ordering = ['-pub_date']
        get_latest_by = '-pub_date'

    def save(self):
        from saudade.common.util import summarize
        self.summary = summarize(self.body, striptags=False)
        super(Post, self).save()

    def __unicode__(self):
        return u"%s" % (self.title)

    def get_absolute_url(self):
        return "/blog/%s/%s/%s/%s" % (self.pub_date.year, self.pub_date.strftime('%b'), self.pub_date.day, self.slug)

    def get_admin_url(self):
        return "/admin/blog/post/%d" % (self.id)