"""passbook Core Group forms"""
from django import forms
from django.contrib.admin.widgets import FilteredSelectMultiple

from passbook.core.models import Group, User


class GroupForm(forms.ModelForm):
    """Group Form"""

    members = forms.ModelMultipleChoiceField(
        User.objects.all(),
        required=False,
        widget=FilteredSelectMultiple("users", False),
    )

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        if self.instance.pk:
            self.initial["members"] = self.instance.user_set.values_list(
                "pk", flat=True
            )

    def save(self, *args, **kwargs):
        instance = super().save(*args, **kwargs)
        if instance.pk:
            instance.user_set.clear()
            instance.user_set.add(*self.cleaned_data["members"])
        return instance

    class Meta:

        model = Group
        fields = ["name", "parent", "members", "attributes"]
        widgets = {
            "name": forms.TextInput(),
        }
