from django import forms
from django.db.models import Q

from .models import Request
from whoisdb.models import Maintainer

class RequestForm(forms.Form):
	RESOURCES = map(lambda _x: (_x, _x), [
		"AS Number (16bit)", "IPv4 /27", "IPv4 > /27", "IPv6", "other"
	])

	applicant = forms.ModelChoiceField(Maintainer.objects.none(), label="Applicant (you)", help_text="Maintainer you want to request resources for")
	provider = forms.ModelChoiceField(Maintainer.objects.none(), label="Provider", help_text="LIR/RIR you want to request resources from")

	subject = forms.CharField(label="Subject")
	resources = forms.CheckboxSelectMultiple(choices=RESOURCES)
	message = forms.CharField(widget=forms.Textarea, help_text="Describe shortly what resources you need and what you need them for")

	def __init__(self, user, *args, **kwargs):
		super(RequestForm, self).__init__(*args, **kwargs)

		self._user = user
		self.fields['applicant'].queryset = self._user.maintainer_set.all()
		self.fields['provider'].queryset = Maintainer.objects.filter(Q(rir=True) | Q(lir=True))

	def clean(self):
		cleaned_data = super(RequestForm, self).clean()

		if not self.errors:
			mnts = self._user.maintainer_set.all()
			if cleaned_data['applicant'] in mnts and cleaned_data['provider'] in mnts:
				raise forms.ValidationError("You could request resources from yourself, but this would actually not make that much sense.")

class ResponseForm(forms.Form):
	new_status = forms.ChoiceField(choices=[("KEEP", "----", )] + list(Request.STATES), initial="KEEP", help_text="Only set this if you want to change the status of this request")
	message = forms.CharField(widget=forms.Textarea)

	def __init__(self, request, user, *args, **kwargs):
		super(ResponseForm, self).__init__(*args, **kwargs)
		self._request = request
		self._user = user

	def clean(self):
		cleaned_data = super(ResponseForm, self).clean()

		if not self.errors:
			if cleaned_data['new_status'] == self._request.status:
				raise forms.ValidationError("Status changed to same as ticket")
			if self._request.status in (Request.STATE_RESOLVED, Request.STATE_REJECTED) and \
			   cleaned_data['new_status'] not in (Request.STATE_OPEN,):
				raise forms.ValidationError("Please put this ticket in an open state before adding messages")


class ProviderResponseForm(ResponseForm):
	createdResources = forms.CharField(label="Created resources", help_text="If you have created resources for this request, please enter their handles here", required=False)