#
# This file is part of FreedomBox.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

"""
Common forms for use by modules.
"""

from django import forms
from django.conf import settings
from django.utils import translation
from django.utils.translation import ugettext_lazy as _, get_language_info

import plinth
from plinth import utils

import os


class ServiceForm(forms.Form):
    """Generic configuration form for a service."""
    is_enabled = forms.BooleanField(
        label=_('Enable application'),
        required=False)


class DomainSelectionForm(forms.Form):
    """Form for selecting a domain name to be used for
    distributed federated applications
    """

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['domain_name'].choices = utils.get_domain_names()

    domain_name = forms.ChoiceField(
        label=_('Select a domain name to be used with this application'),
        help_text=_(
            'Warning! The application may not work properly if domain name is changed later.'
        ),
        choices=[]
    )


class LanguageSelectionForm(forms.Form):
    """Form for selecting the user's preferred language """

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        supported_languages = [(None, '-----------')]
        for language_code, language_name in settings.LANGUAGES:
            locale_code = translation.to_locale(language_code)
            plinth_dir = os.path.dirname(plinth.__file__)
            if language_code == 'en' or os.path.exists(
                    os.path.join(plinth_dir, 'locale', locale_code)):
                supported_languages.append((language_code, get_language_info(language_code)['name_local']))

        self.fields['language'].choices = supported_languages

    language = forms.ChoiceField(label='Language', choices=[], required=False)