from django.utils.translation import gettext as _
from rest_framework import status
from rest_framework.response import Response

from ....core.mail import mail_user
from ...credentialchange import store_new_credential
from ...serializers import ChangeEmailSerializer


def change_email_endpoint(request, pk=None):
    serializer = ChangeEmailSerializer(
        data=request.data, context={"user": request.user}
    )

    if serializer.is_valid():
        token = store_new_credential(
            request, "email", serializer.validated_data["new_email"]
        )

        mail_subject = _("Confirm e-mail change on %(forum_name)s forums")
        mail_subject = mail_subject % {"forum_name": request.settings.forum_name}

        # swap address with new one so email is sent to new address
        request.user.email = serializer.validated_data["new_email"]

        mail_user(
            request.user,
            mail_subject,
            "misago/emails/change_email",
            context={"settings": request.settings, "token": token},
        )

        message = _("E-mail change confirmation link was sent to new address.")
        return Response({"detail": message})
    else:
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)