#!/usr/bin/env python3
"""
Custom Jinja2 environment.
"""
import jinja2
from user_messages import api
from django.urls import reverse
from django.utils.timezone import template_localtime
from django.contrib.staticfiles.storage import staticfiles_storage

def get_sub_msgs(**kwargs):
	"""Returns all messages 'subscription' in the tag."""
	messages = api.get_messages(**kwargs)
	sub_msgs = []
	for message in messages:
		if 'subscription' in message.tags:
			sub_msgs.insert(0, message)
	return sub_msgs

def environment(**options):
	"""
	Custom Jinja2 environment.
	"""
	env = jinja2.Environment(**options)
	env.globals.update({
		'undefined': jinja2.StrictUndefined,
		'autoescape': True,
		'trim_blocks': True,
		'lstrip_blocks': True,

		'url': reverse,
		'static': staticfiles_storage.url,
		'get_messages': api.get_messages,
		'localtime': template_localtime,
		'get_sub_msgs': get_sub_msgs,
	})
	return env