import re

from django.shortcuts import get_object_or_404
from django.utils import timezone
from django.views.generic.edit import CreateView
from django.views.generic.detail import DetailView

from . import forms, models


SCRATCH_ID_REGEX = re.compile(r'https://scratch\.mit\.edu/projects/([0-9]+)')

def get_scratch_id_from_url(url):
    match = SCRATCH_ID_REGEX.search(url)
    return int(match.group(1))


class ScratchProjectAddView(CreateView):
    form_class = forms.ScratchProjectAddForm
    template_name = 'scratch_show/scratchproject_form.html'

    def dispatch(self, request, *args, **kwargs):
        self.event = get_object_or_404(models.Event, date=timezone.now().date(), accept_projects=True)
        return super().dispatch(request, *args, **kwargs)

    def form_valid(self, form):
        url = form.cleaned_data['url']
        form.instance.project_id = get_scratch_id_from_url(url)
        form.instance.event = self.event
        return super().form_valid(form)


class ScratchProjectDetailView(DetailView):
    model = models.ScratchProject