# Copyright (c) 2023-present Pi Dash Software, Inc. and contributors
# SPDX-License-Identifier: AGPL-3.0-only
# See the LICENSE file for details.

# Python imports
import logging

# Third party imports
from celery import shared_task

# Django imports
from django.core.mail import EmailMultiAlternatives, get_connection
from django.template.loader import render_to_string

# Module imports
from pi_dash.db.models import User, Workspace, WorkspaceMemberInvite
from pi_dash.license.utils.instance_value import get_email_configuration
from pi_dash.utils.email import generate_plain_text_from_html
from pi_dash.utils.exception_logger import log_exception


@shared_task
def workspace_invitation(email, workspace_id, token, current_site, inviter):
    try:
        user = User.objects.get(email=inviter)

        workspace = Workspace.objects.get(pk=workspace_id)
        workspace_member_invite = WorkspaceMemberInvite.objects.get(token=token, email=email)

        # Relative link
        relative_link = (
            f"/workspace-invitations/?invitation_id={workspace_member_invite.id}&slug={workspace.slug}&token={token}"  # noqa: E501
        )

        # The complete url including the domain
        abs_url = str(current_site) + relative_link

        (
            EMAIL_HOST,
            EMAIL_HOST_USER,
            EMAIL_HOST_PASSWORD,
            EMAIL_PORT,
            EMAIL_USE_TLS,
            EMAIL_USE_SSL,
            EMAIL_FROM,
        ) = get_email_configuration()

        # Subject of the email
        subject = f"{user.first_name or user.display_name or user.email} has invited you to join them in {workspace.name} on Pi Dash"  # noqa: E501

        context = {
            "email": email,
            "first_name": user.first_name or user.display_name or user.email,
            "workspace_name": workspace.name,
            "abs_url": abs_url,
        }

        html_content = render_to_string("emails/invitations/workspace_invitation.html", context)

        text_content = generate_plain_text_from_html(html_content)

        workspace_member_invite.message = text_content
        workspace_member_invite.save()

        connection = get_connection(
            host=EMAIL_HOST,
            port=int(EMAIL_PORT),
            username=EMAIL_HOST_USER,
            password=EMAIL_HOST_PASSWORD,
            use_tls=EMAIL_USE_TLS == "1",
            use_ssl=EMAIL_USE_SSL == "1",
        )

        msg = EmailMultiAlternatives(
            subject=subject,
            body=text_content,
            from_email=EMAIL_FROM,
            to=[email],
            connection=connection,
        )
        msg.attach_alternative(html_content, "text/html")
        msg.send()
        logging.getLogger("pi_dash.worker").info("Email sent successfully")
        return
    except (Workspace.DoesNotExist, WorkspaceMemberInvite.DoesNotExist):
        return
    except Exception as e:
        log_exception(e)
        return
