from django.utils.http import urlquote
from django.core.urlresolvers import reverse
from django.utils.translation import ugettext_lazy as _
import re



class CONTENT_TYPE:

    TEXT_PLAIN = 'text/plain'
    TEXT_HTML = 'text/html'

    choices = (('text/plain', _('plain text')),
               ('text/html', _('HTML')))

    subtype_choices = (('plain', _('plain text')),
                       ('html', _('HTML')))

    types = ['text/plain', 'text/html']

    subtypes = ['plain', 'html']


class CONTENT_SUBTYPE:
    PLAIN = 'plain'
    HTML = 'html'



def format_url_params(**kwargs):
    """ return http param string.

    example:
      format_url_params(a=1, b=2) return 'a=1&b=2'

    """

    return '&'.join(['%s=%s' % (urlquote(k), urlquote(v))
                     for k, v in kwargs.items()])

def format_url(url, **params):
    """ format url with params.

        Example:
          format_url('http://yandex.ru/yandsearch', text=abc)
          will returl 'http://yandex.ru/yandsearch?text=abc'
    """
    return url + '?' + format_url_params(**params)


def format_url_full(site_url, reverse_name, reverse_kwargs={}, GET_kwargs={}):
    """ format full url with reverse and passing GET-params """

    local_url = reverse(reverse_name, kwargs=reverse_kwargs)
    return format_url("http://%s%s" % (site_url, local_url), **GET_kwargs)



URL_RE1 = r"(\b(http|https)://([-A-Za-z0-9+&@#/%?=~_()|!:,.;]*[-A-Za-z0-9+&@#/%=~_()|]))"
URL_RE2 = r"((^|\b)www\.([-A-Za-z0-9+&@#/%?=~_()|!:,.;]*[-A-Za-z0-9+&@#/%=~_()|]))"

def link_urls(text):
    return re.sub(URL_RE2,r'<a rel="nofollow" target="_blank" href="http://\1">\1</a>',
                  re.sub(URL_RE1,r'<a rel="nofollow" target="_blank" href="\1">\1</a>',
                         text))