import json

from contrib.admin import CommonAdminInlineMixin
from contrib.admin import CommonAdminMixin
from django.conf import settings
from django.contrib import admin
from django.contrib import messages
from django.contrib.admin import helpers
from django.shortcuts import render
from django.utils.translation import gettext_lazy as _
from members.admin import FilteredMemberFieldMixin
from members.models import Member
from rules.contrib.admin import ObjectPermissionsModelAdmin

from .mailutils import NOT_SENT
from .mailutils import PARTLY_SENT
from .models import Attachment
from .models import EmailAddress
from .models import EmailAddressForm
from .models import Message
from .models import MessageForm

# from easy_select2 import apply_select2


class AttachmentInline(CommonAdminInlineMixin, admin.TabularInline):
    model = Attachment
    extra = 0


class EmailAddressAdmin(FilteredMemberFieldMixin, admin.ModelAdmin):
    list_display = ("email", "internal_only")
    fields = (
        "name",
        "to_members",
        "to_groups",
        "internal_only",
    )
    # formfield_overrides = {
    #    models.ManyToManyField: {'widget': forms.CheckboxSelectMultiple},
    #    models.ForeignKey: {'widget': apply_select2(forms.Select)}
    # }
    filter_horizontal = ("to_members",)
    form = EmailAddressForm


class MessageAdmin(
    FilteredMemberFieldMixin,
    CommonAdminMixin,
    ObjectPermissionsModelAdmin,
):
    """Message creation view"""

    exclude = ("created_by", "to_notelist")
    list_display = (
        "subject",
        "get_recipients",
        "sent",
    )
    search_fields = ("subject",)
    list_filter = ("sent",)
    change_form_template = "mailer/change_form.html"
    readonly_fields = ("sent",)
    # formfield_overrides = {
    #    models.ManyToManyField: {'widget': forms.CheckboxSelectMultiple},
    #    models.ForeignKey: {'widget': apply_select2(forms.Select)}
    # }

    inlines = [AttachmentInline]
    actions = ["send_message"]
    form = MessageForm
    filter_horizontal = ("to_members", "reply_to")

    def save_model(self, request, obj, form, change):
        if not change and hasattr(request.user, "member"):
            obj.created_by = request.user.member
        super().save_model(request, obj, form, change)

    def send_message(self, request, queryset):
        if request.POST.get("confirmed"):
            for msg in queryset:
                submit_message(msg, request)
        else:
            context = {
                "action_checkbox_name": helpers.ACTION_CHECKBOX_NAME,
                "mails": queryset,
                "ids": queryset.values_list("id"),
                "some_sent": any(m.sent for m in queryset),
            }
            return render(
                request,
                "mailer/confirm_send.html",
                context,
            )

    send_message.short_description = _("Send message")

    def response_change(self, request, obj):
        if "_send" in request.POST:
            submit_message(obj, request)
        return super().response_change(request, obj)

    def response_add(self, request, obj):
        if "_send" in request.POST:
            submit_message(obj, request)
        return super().response_add(request, obj)

    def get_form(self, request, obj=None, **kwargs):
        form = super().get_form(request, obj, **kwargs)
        raw_members = request.GET.get("members", None)
        if raw_members is not None:
            m_ids = json.loads(raw_members)
            if type(m_ids) is not list:
                return form
            members = Member.objects.filter(pk__in=m_ids)
            form.base_fields["to_members"].initial = members
        return form


def submit_message(msg, request):
    sender = None
    if not hasattr(request.user, "member"):
        messages.error(
            request,
            _(
                "Your account is not connected to a member. Please contact your system administrator."
            ),
        )
        return
    sender = request.user.member
    if not sender.has_internal_email():
        messages.error(
            request,
            _(
                "Your email address is not an internal email address. Please use an email address with one of the following domains: %(domains)s."
            )
            % {"domains": ", ".join(settings.ALLOWED_EMAIL_DOMAINS_FOR_INVITE_AS_USER)},
        )
        return
    success = msg.submit(sender)
    if success == NOT_SENT:
        messages.error(request, _("Failed to send message"))
    elif success == PARTLY_SENT:
        messages.warning(
            request,
            _("Failed to send some messages"),
        )
    else:
        messages.success(
            request,
            _("Successfully sent message"),
        )


admin.site.register(Message, MessageAdmin)
admin.site.register(EmailAddress, EmailAddressAdmin)