from dal import autocomplete

from django import forms
from django.core.exceptions import ValidationError

from .models import CertificationDefinition, Certification


class CertificationForm(forms.ModelForm):
    certification_definition = forms.ModelChoiceField(
        queryset=CertificationDefinition.objects.all()
    )

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        instance = kwargs.get("instance")
        if instance:
            self.fields[
                "certification_definition"
            ].initial = instance.certification_version.definition

    def clean(self):
        cleaned_data = super().clean()
        certification_version = cleaned_data.get("certification_version")
        certification_definition = cleaned_data.get("certification_definition")

        if certification_version.definition != certification_definition:
            raise ValidationError(
                "Certification Version did not match Certification Definition!"
            )

    class Media:
        js = ("paperwork/certification-form-clear-autocomplete.js",)

    class Meta:
        model = Certification
        fields = [
            "certification_definition",
            "certification_version",
            "name",
            "member",
            "certified_by",
            "date",
            "notes",
        ]
        widgets = {
            "certification_version": autocomplete.ModelSelect2(
                url="paperwork:certification_version_autocomplete",
                forward=["certification_definition"],
            )
        }