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# blog/forms.py — ModelForm
from django import forms
from .models import Post, Tag

class PostModelForm(forms.ModelForm):
    # Extra form-only field (not in the model)
    tag_names = forms.CharField(
        required=False,
        help_text='Comma-separated tags (e.g. python, django).',
        widget=forms.TextInput(attrs={'placeholder': 'python, django, web'}),
    )

class Meta:
        model   = Post
        fields  = ['title', 'body', 'category', 'status']
        widgets = {
            'title':  forms.TextInput(attrs={'class': 'form-control'}),
            'body':   forms.Textarea(attrs={'class': 'form-control', 'rows': 10}),
            'status': forms.Select(attrs={'class': 'form-select'}),
        }
        labels  = {'body': 'Content'}

def save(self, commit=True):
        post = super().save(commit=False)
        if commit:
            post.save()
            # Handle the extra tag_names field
            tag_names = self.cleaned_data.get('tag_names', '')
            if tag_names:
                for name in [t.strip() for t in tag_names.split(',') if t.strip()]:
                    tag, _ = Tag.objects.get_or_create(
                        name=name,
                        defaults={'slug': name.lower().replace(' ', '-')},
                    )
                    post.tags.add(tag)
            self.save_m2m()
        return post