# -*- coding: utf-8 -*-
from django import forms
from django.conf import settings
from django.utils.translation import ugettext_lazy as _


class AdminForm(forms.Form):
    model = None

    def __init__(self, *args, **kwargs):
        """
        create dynamical translated fields fields
        """
        if len(settings.LANGUAGES) in range(10):
            for lid, (code, name) in enumerate(settings.LANGUAGES):
                # uses enumerate for detect iteration number
                # first iteration is a default lang so it required fields
                required = True if lid == 0 else False


class AdminFilterForm(forms.Form):
    """
    class for filtering lists in admin panel
    """
    model = None # which models work with
    exact_name = forms.CharField(label=_(u'Название'), required=False)
    name = forms.CharField(label=_(u'Часть названия'), required=False)


    def filter(self):
        """

        return filtered queryset
        form must be cleaned before calling this method

        """
        model = self.model
        data = self.cleaned_data
        name = data['name']
        exact_name = data['exact_name']
        if exact_name:
            qs = model.objects.filter(translations__name=name).distinct()
            return qs

        qs = model.objects.all()
        if name:
            qs = qs.filter(translations__name__icontains=name).distinct()

        return qs