from django import forms

from .models import Event


class EventForm(forms.ModelForm):
    start = forms.DateTimeField(
        input_formats=['%Y-%m-%dT%H:%M'],
        widget=forms.DateTimeInput(
            attrs={'type': 'datetime-local', 'class': 'form-control'},
            format='%Y-%m-%dT%H:%M',
        ),
    )
    end = forms.DateTimeField(
        input_formats=['%Y-%m-%dT%H:%M'],
        widget=forms.DateTimeInput(
            attrs={'type': 'datetime-local', 'class': 'form-control'},
            format='%Y-%m-%dT%H:%M',
        ),
    )

    class Meta:
        model = Event
        fields = ['name', 'location', 'start', 'end', 'event_url', 'summary', 'is_published']
        widgets = {
            'name': forms.TextInput(attrs={'class': 'form-control', 'placeholder': 'Downtown Spring Market'}),
            'location': forms.TextInput(attrs={'class': 'form-control', 'placeholder': 'Riverfront Pavilion'}),
            'event_url': forms.URLInput(attrs={'class': 'form-control', 'placeholder': 'https://event-page.example.com'}),
            'summary': forms.Textarea(attrs={'class': 'form-control', 'rows': 4, 'placeholder': 'Anything visitors should know before attending.'}),
            'is_published': forms.CheckboxInput(attrs={'class': 'form-check-input'}),
        }
        help_texts = {
            'is_published': 'Only published events appear in the public calendar and embed widget.',
        }

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        for field_name in ['start', 'end']:
            value = self.initial.get(field_name) or getattr(self.instance, field_name, None)
            if value:
                self.initial[field_name] = value.strftime('%Y-%m-%dT%H:%M')

    def clean(self):
        cleaned_data = super().clean()
        start = cleaned_data.get('start')
        end = cleaned_data.get('end')
        if start and end and end <= start:
            self.add_error('end', 'End time must be after the start time.')
        return cleaned_data
