# -*- coding: utf-8 -*-
from django.forms.utils import ErrorList
from django.utils.encoding import force_text
from django.utils.html import escape, format_html, format_html_join, html_safe
from django.utils.safestring import mark_safe

class SemanticErrorList(ErrorList):

    def __unicode__(self):
        return self.as_list()

    def as_error_message(self):
        if not self.data:
            return ''
        return format_html(
            u'<div class="{}"><i class="circular close icon"></i>{}</div>',
            u'ui error message',
            format_html_join('', u'<p>{}</p>', ((force_text(e),) for e in self))
        )

    def as_list(self):
        if not self.data:
            return ''
        return format_html(
            u'<div class="{}">{}</div>',
            u'ui list',
            format_html_join('', u'<div class="item">{}</div>', ((force_text(e),) for e in self))
        )

    
    def as_pointing_label(self, position='top'):
        """
        Options of position: top, left, right and bottom
        """
        if not self.data:
            return ''
        return format_html(
            u'<div class="{}"><i class="circle remove icon"></i>{}</div>',
            u'ui top pointing red label',
            format_html_join('', u'{}', ((force_text(e),) for e in self))
        )

    def __init__(self, initlist=None, error_class=None):
        super(ErrorList, self).__init__(initlist)

        if error_class is None:
            self.error_class = 'error'
        else:
            self.error_class = '{}'.format(error_class)

# -*- coding: utf-8 -*-
from django import template
from django.forms.utils import ErrorList
from core.utils import SemanticErrorList

register = template.Library()

@register.filter
def as_pointing_label(errors):
    '''
    Generate error list as semanti-ui red pointing label.

    Usage as templatetag on template:
        {% load errorlist %}
        ...
        <label for="id_<your_field_name>">{% trans '<your_field_label>' %}</label>
        {{ form.<your_field_name> }}
        {{ form.<your_field_name>.errors|as_pointing_label }}
        ...
    '''
    if type(errors) is ErrorList:
        errors = errors.as_ul()

    if not errors:
        return u''

    errors = errors.replace(u'<ul class="errorlist">', '')
    errors = errors.replace(u'</ul>', '')
    errors = errors.replace(u'<li>', '')
    errors = errors.split(u'</li>')
    errors = [error for error in errors if error]
    result = SemanticErrorList(errors)
    return result.as_pointing_label()