import datetime

from django.contrib import messages
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 Item


def toggle_done(request, items):
    # Check for items in the mark_done POST array. If present, change status to complete.
    for item in items:
        i = Item.objects.get(id=item)
        old_state = "completed" if i.completed else "incomplete"
        i.completed = not i.completed  # Invert the done state, either way
        new_state = "completed" if i.completed else "incomplete"
        i.completed_date = datetime.datetime.now()
        i.save()
        messages.success(request, "Item \"{i}\" changed from {o} to {n}.".format(i=i.title, o=old_state, n=new_state))


def toggle_deleted(request, deleted_items):
    # Delete selected items
    for item_id in deleted_items:
        i = Item.objects.get(id=item_id)
        messages.success(request, "Item \"{i}\" deleted.".format(i=i.title))
        i.delete()


def send_notify_mail(request, new_task):
    # Send email
    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, })
    try:
        send_mail(
            email_subject, email_body, new_task.created_by.email,
            [new_task.assigned_to.email], fail_silently=False)
    except ConnectionRefusedError:
        messages.error(request, "Task saved but mail not sent. Contact your administrator.")