from django import forms
from .models import Course

from django.utils import timezone

class CourseForm(forms.ModelForm):
    class Meta:
        model = Course
        fields = ['nom']

    def save(self, commit=True):
        instance = super().save(commit=False)
        instance.date = timezone.localdate()
        if commit:
            instance.save()
        return instance

    def clean(self):
        cleaned_data = super().clean()
        nom = cleaned_data.get('nom')
        date = timezone.localdate()
        if Course.objects.filter(nom=nom, date=date).exists():
            raise forms.ValidationError("Une course avec ce nom existe déjà aujourd'hui.")
        return cleaned_data