# -*- coding: utf-8 -*-
#
#  Copyright (c) 2008—2012 Andy Mikhailenko
#
#  This file is part of django-autoslug.
#
#  django-autoslug is free software under terms of the GNU Lesser
#  General Public License version 3 (LGPLv3) as published by the Free
#  Software Foundation. See the file README for copying conditions.
#
"""
Django settings that affect django-autoslug:

`AUTOSLUG_SLUGIFY_FUNCTION`
  Allows to define a custom slugifying function.

  The function can be repsesented as string or callable, e.g.::

      # custom function, path as string:
      AUTOSLUG_SLUGIFY_FUNCTION = 'some_app.slugify_func'

      # custom function, callable:
      AUTOSLUG_SLUGIFY_FUNCTION = some_app.slugify_func

      # custom function, defined inline:
      AUTOSLUG_SLUGIFY_FUNCTION = lambda slug: 'can i haz %s?' % slug

  If no value is given, default value is used.

  Default value is one of these depending on availability in given order:

  * `unidecode.unidecode()` if Unidecode_ is available;
  * `pytils.translit.slugify()` if pytils_ is available;
  * `django.template.defaultfilters.slugify()` bundled with Django.

  django-autoslug also ships a couple of slugify functions that use
  the translitcodec_ Python library, e.g.::

     # using as many characters as needed to make a natural replacement
     AUTOSLUG_SLUGIFY_FUNCTION = 'autoslug.utils.translit_long'

     # using the minimum number of characters to make a replacement
     AUTOSLUG_SLUGIFY_FUNCTION = 'autoslug.utils.translit_short'

     # only performing single character replacements
     AUTOSLUG_SLUGIFY_FUNCTION = 'autoslug.utils.translit_one'

.. _Unidecode: http://pypi.python.org/pypi/Unidecode
.. _pytils: http://pypi.python.org/pypi/pytils
.. _translitcodec: http://pypi.python.org/pypi/translitcodec

"""
from django.conf import settings

# use custom slugifying function if any
slugify = getattr(settings, 'AUTOSLUG_SLUGIFY_FUNCTION', None)

if not slugify:
    try:
        # i18n-friendly approach
        from unidecode import unidecode
        slugify = lambda s: unidecode(s).replace(' ', '-')
    except ImportError:
        try:
            # Cyrillic transliteration (primarily Russian)
            from pytils.translit import slugify
        except ImportError:
            # fall back to Django's default method
            slugify = 'django.template.defaultfilters.slugify'

# find callable by string
if isinstance(slugify, str):
    from django.core.urlresolvers import get_callable
    slugify = get_callable(slugify)
