# Copyright The IETF Trust 2012-2020, All Rights Reserved
# -*- coding: utf-8 -*-


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

from ietf.community.models import SearchRule, EmailSubscription
from ietf.doc.fields import SearchableDocumentsField
from ietf.person.models import Person
from ietf.person.fields import SearchablePersonField

class AddDocumentsForm(forms.Form):
    documents = SearchableDocumentsField(label="Add documents to track", doc_type="draft")

class SearchRuleTypeForm(forms.Form):
    rule_type = forms.ChoiceField(choices=[('', '--------------')] + SearchRule.RULE_TYPES)

class SearchRuleForm(forms.ModelForm):
    person = SearchablePersonField()

    class Meta:
        model = SearchRule
        fields = ('state', 'group', 'person', 'text')

    def __init__(self, clist, rule_type, *args, **kwargs):
        kwargs["prefix"] = rule_type # add prefix to avoid mixups in the Javascript
        super(SearchRuleForm, self).__init__(*args, **kwargs)

        def restrict_state(state_type, slug=None):
            f = self.fields['state']
            f.queryset = f.queryset.filter(used=True).filter(type=state_type)
            if slug:
                f.queryset = f.queryset.filter(slug=slug)
            if len(f.queryset) == 1:
                f.initial = f.queryset[0].pk
                f.widget = forms.HiddenInput()

        if rule_type in ['group', 'group_rfc', 'area', 'area_rfc']:
            restrict_state("draft", "rfc" if rule_type.endswith("rfc") else "active")

            if rule_type.startswith("area"):
                self.fields["group"].label = "Area"
                self.fields["group"].queryset = self.fields["group"].queryset.filter(Q(type="area") | Q(acronym="irtf")).order_by("acronym")
            else:
                self.fields["group"].queryset = self.fields["group"].queryset.filter(type__in=("wg", "rg", "ag", )).order_by("acronym")

            del self.fields["person"]
            del self.fields["text"]

        elif rule_type.startswith("state_"):
            mapping = {
                "state_iab": "draft-stream-iab",
                "state_iana": "draft-iana-review",
                "state_iesg": "draft-iesg",
                "state_irtf": "draft-stream-irtf",
                "state_ise": "draft-stream-ise",
                "state_rfceditor": "draft-rfceditor",
                "state_ietf": "draft-stream-ietf",
            }
            restrict_state(mapping[rule_type])

            del self.fields["group"]
            del self.fields["person"]
            del self.fields["text"]

        elif rule_type in ["author", "author_rfc", "shepherd", "ad"]:
            restrict_state("draft", "rfc" if rule_type.endswith("rfc") else "active")

            if rule_type.startswith("author"):
                self.fields["person"].label = "Author"
            elif rule_type.startswith("shepherd"):
                self.fields["person"].label = "Shepherd"
            elif rule_type.startswith("ad"):
                self.fields["person"].label = "Area Director"
                self.fields["person"] = forms.ModelChoiceField(queryset=Person.objects.filter(role__name__in=("ad", "pre-ad"), role__group__state="active").distinct().order_by("name"))

            del self.fields["group"]
            del self.fields["text"]

        elif rule_type == "name_contains":
            restrict_state("draft", "rfc" if rule_type.endswith("rfc") else "active")

            del self.fields["person"]
            del self.fields["group"]

        if 'group' in self.fields:
            self.fields['group'].queryset = self.fields['group'].queryset.filter(state="active").order_by("acronym")
            self.fields['group'].choices = [(g.pk, "%s - %s" % (g.acronym, g.name)) for g in self.fields['group'].queryset]

        for name, f in self.fields.items():
            f.required = True

    def clean_text(self):
        return self.cleaned_data["text"].strip().lower() # names are always lower case


class SubscriptionForm(forms.ModelForm):
    def __init__(self, user, clist, *args, **kwargs):
        self.clist = clist
        self.user = user

        super(SubscriptionForm, self).__init__(*args, **kwargs)

        self.fields["notify_on"].widget = forms.RadioSelect(choices=self.fields["notify_on"].choices)
        self.fields["email"].queryset = self.fields["email"].queryset.filter(person__user=user, active=True).order_by("-primary")
        self.fields["email"].widget = forms.RadioSelect(choices=[t for t in self.fields["email"].choices if t[0]])

        if self.fields["email"].queryset:
            self.fields["email"].initial = self.fields["email"].queryset[0]

    def clean_email(self):
        self.cleaned_data["email"].address = self.cleaned_data["email"].address.strip().lower()
        return self.cleaned_data["email"]

    def clean(self):
        if EmailSubscription.objects.filter(community_list=self.clist, email=self.cleaned_data["email"], notify_on=self.cleaned_data["notify_on"]).exists():
            raise forms.ValidationError("You already have a subscription like this.")

    class Meta:
        model = EmailSubscription
        fields = ("notify_on", "email")