import json
from smtplib import SMTPException

from anymail.exceptions import AnymailRequestsAPIError
from django.conf import settings
from django.core.mail import EmailMessage
from django.http import JsonResponse
from django.shortcuts import get_object_or_404
from django.utils.decorators import method_decorator
from django.views import generic
from django.views.decorators.csrf import csrf_exempt, ensure_csrf_cookie
from django.views.decorators.http import require_http_methods

from pictures.models import Contact, Message

STATUS_OK = "ok"
STATUS_ERROR = "error"


class MessageListView(generic.ListView):
    model = Message
    template_name = "pictures/messages-list.html"
    context_object_name = "messages"


@method_decorator(ensure_csrf_cookie, name="dispatch")
class MessageDetailView(generic.DetailView):
    model = Message
    template_name = "pictures/messages-detail.html"
    context_object_name = "message"


def send_email(request, pk):
    message = get_object_or_404(Message, pk=pk)
    all_media = message.media_files.all()
    media_count = len(all_media)
    if media_count > 1:
        subject = "Vos photos"
    else:
        subject = "Votre photo"
    message_text = (
        message.content
        + "\n\n-- \nEnvoyé depuis votre cadre photo, par Claire & Gabriel"
    )

    try:
        email = EmailMessage(
            subject,
            message_text,
            from_email=None,
            to=[settings.EMAIL_RECIPIENT],
        )
        for media in all_media:
            email.attach_file(media.file.path)
        email.send(fail_silently=False)
    except (SMTPException, AnymailRequestsAPIError) as e:
        return _error_response(str(e))
    return JsonResponse({"status": STATUS_OK}, status=200)


def _error_response(message: str, status_code: int = 500):
    return JsonResponse(
        {"status": STATUS_ERROR, "message": message}, status=status_code
    )


@csrf_exempt
@require_http_methods(["POST"])
def create_message(request):
    try:
        body = request.body.decode("utf-8")
        data = json.loads(body)
        phone_number = data.get("phone_number")
        if phone_number is None:
            return _error_response("phone_number is required", 400)
        contact, _ = Contact.objects.get_or_create(phone_number=phone_number)
        content = data.get("content", "")
        message = Message.objects.create(sender=contact, content=content)
    except Exception as e:
        return _error_response(str(e))
    return JsonResponse({"status": STATUS_OK, "data": {"id": message.pk}}, status=201)