from django import forms
from .models import Work

class WorkCreateForm(forms.ModelForm):
    uploads = forms.FileField(label="PDFs to upload", widget=forms.ClearableFileInput(attrs={'multiple': True}))

    class Meta:
        model = Work
        fields = ['uploads', 'name', 'orchestration', 'running_time', 'notes']    

class PlaylistAddForm(forms.Form):
    work = forms.ModelChoiceField(queryset=Work.objects.all())

    def __init__(self, instance, *args, **kwargs):
         super(PlaylistAddForm, self).__init__(*args, **kwargs)

         existing = [ x[0] for x in instance.works.values_list('pk') ]

         qs = Work.objects.filter(ensemble_id=instance.ensemble_id).exclude(id__in=existing)
         self.fields['work'].queryset = qs
         self.instance = instance
    
    def save(self):
        self.instance.works.add(self.cleaned_data['work'])