import os

from django import forms

from django.conf import settings

from django.utils.translation import gettext_lazy as _

from app.mixins import BootstrapFormMixin

from application.models import PermissionSlip

from application.validators import validate_file_extension

EXTENSIONS = getattr(settings, 'SUPPORTED_PERMISSION_SLIP_EXTENSIONS', None)

class PermissionSlipForm(forms.ModelForm, BootstrapFormMixin):

bootstrap_field_info = {'': {'fields': [{'name': 'file', 'space': 12}, {'name': 'terms', 'space': 12}]}}

file = forms.FileField(validators=[validate_file_extension(EXTENSIONS)], required=True,

label=_('Upload your permission slip'),

help_text=_('Accepted file formats: %s' % (', '.join(EXTENSIONS) if EXTENSIONS else 'Any')))

terms = forms.BooleanField(label=_('I understand that the permission slip I am providing will be used for '

'ensuring my safety during the event and for addressing any legal aspects '

'related to my participation in the hackathon. I hereby consent to the '

'use of this document for these purposes.'), required=True)

def __init__(self, *args, **kwargs):

instance = kwargs.get('instance', None)

self._old_file = instance.file if instance is not None else None

super().__init__(*args, **kwargs)

def save(self, commit=True):

instance = super().save(commit=False)

instance.status = instance.STATUS_UPLOADED

old_file = getattr(self, '_old_file', None)

try:

os.remove(old_file.path)

except ValueError:

pass

if commit:

instance.save()

return instance

class Meta:

model = PermissionSlip

fields = ('file', 'terms')