import re
from django.shortcuts import get_object_or_404
from django import template

ELLIPSIZER = '...'

REGEX_LINES = re.compile(r'(<div class="br"></div>)', re.U | re.S)
REGEX_TAG = re.compile(r'<(/)?([^ ]+?)(?:(\s*/)| .*?)?>', re.S)

IMG_ACTION_URL = '[<a href="{}">{}</a>]'


register = template.Library()

actions = [
    {
        'name': 'google',
        'link': 'http://google.com/searchbyimage?image_url=%s',
    },
    {
        'name': 'iqdb',
        'link': 'http://iqdb.org/?url=%s',
    },
]


@register.simple_tag(name='post_url')
def post_url(*args, **kwargs):
    post_id = args[0]

    post = get_object_or_404('Post', id=post_id)

    return post.get_url()


@register.simple_tag(name='image_actions')
def image_actions(*args, **kwargs):
    image_link = args[0]
    if len(args) > 1:
        image_link = 'http://' + args[1] + image_link  # TODO https?

    return ', '.join([IMG_ACTION_URL.format(
        action['link'] % image_link, action['name'])for action in actions])


@register.inclusion_tag('boards/post.html', name='post_view')
def post_view(post, moderator=False, need_open_link=False, truncated=False,
              reply_link=False, **kwargs):
    """
    Get post
    """

    thread = post.get_thread()
    is_opening = post.is_opening()

    if is_opening:
        opening_post_id = post.id
    else:
        opening_post_id = thread.get_opening_post_id()

    css_class = 'post'
    if thread.archived:
        css_class += ' archive_post'
    elif not thread.can_bump():
        css_class += ' dead_post'

    return {
        'post': post,
        'moderator': moderator,
        'is_opening': is_opening,
        'thread': thread,
        'css_class': css_class,
        'need_open_link': need_open_link,
        'truncated': truncated,
        'opening_post_id': opening_post_id,
        'reply_link': reply_link,
    }