from django.contrib.sites.models import Site
from django.core.mail import send_mail
from django.template.loader import render_to_string

from todo.models import Comment


def send_notify_mail(new_task):
    # Send email to assignee if task is assigned to someone other than submittor.
    # Unassigned tasks should not try to notify.

    if not new_task.assigned_to == new_task.created_by:
        current_site = Site.objects.get_current()
        email_subject = render_to_string("todo/email/assigned_subject.txt", {'task': new_task})
        email_body = render_to_string(
            "todo/email/assigned_body.txt",
            {'task': new_task, 'site': current_site, })

        send_mail(
            email_subject, email_body, new_task.created_by.email,
            [new_task.assigned_to.email], fail_silently=False)


def send_email_to_thread_participants(task, msg_body, user, subject=None):
    # Notify all previous commentors on a Task about a new comment.

    current_site = Site.objects.get_current()
    email_subject = subject if subject else render_to_string("todo/email/assigned_subject.txt", {'task': task})
    email_body = render_to_string(
        "todo/email/newcomment_body.txt",
        {'task': task, 'body': msg_body, 'site': current_site, 'user': user}
    )

    # Get list of all thread participants - everyone who has commented, plus task creator.
    commenters = Comment.objects.filter(task=task)
    recip_list = [ca.author.email for ca in commenters]
    recip_list.append(task.created_by.email)
    recip_list = list(set(recip_list))  # Eliminate duplicates

    send_mail(email_subject, email_body, task.created_by.email, recip_list, fail_silently=False)