# -*- coding: utf-8 -*-

'''

Created on Jul 17, 2014

@author: tc

'''

import logging

from renkanmanager.models import Renkan

from django.conf import settings

from django.core.mail.message import EmailMultiAlternatives

from django.db import models

from django.db.models.signals import post_save

from django.template.base import TemplateDoesNotExist

from django.template.loader import render_to_string

from django.utils.html import strip_tags

from django.utils.translation import ugettext as _

logger = logging.getLogger(__name__)

class HdalabRenkan(models.Model):

    EDITION = 1

    MODERATED = 2

    PUBLISHED = 3

    REJECTED = 4

    STATE_CHOICES = (

    (EDITION, 'edition'),

    (MODERATED, 'moderated'),

    (PUBLISHED, 'published'),

    (REJECTED, 'rejected'),

    )

    STATE_CHOICES_DICT = {

        EDITION: _('edition_state'),

        MODERATED: _('moderated_state'),

        PUBLISHED: _('published_state'),

        REJECTED: _('rejected_state')

    }

    renkan = models.ForeignKey(Renkan, blank=False, null=False)

    state = models.IntegerField(choices=STATE_CHOICES, default=1)

    favorite = models.BooleanField(null=False, blank=False, default=False)

    class Meta:

        app_label = 'hdalab'

class HdalabRenkanStateTransition(models.Model):

    renkan = models.ForeignKey(HdalabRenkan, blank=False, null=False)

    from_state = models.IntegerField(choices=HdalabRenkan.STATE_CHOICES, default=1, blank=False, null=False)

    to_state = models.IntegerField(choices=HdalabRenkan.STATE_CHOICES, default=1, blank=False, null=False)

    ts = models.DateTimeField(auto_now_add=True, blank=False, null=False)

    message = models.TextField(blank=True, null=True)

    author = models.ForeignKey(settings.AUTH_USER_MODEL, blank=False, null=False)

    class Meta:

        app_label = 'hdalab'

MAIL_TEMPLATES = {

    (HdalabRenkan.MODERATED,HdalabRenkan.PUBLISHED): ("mails/published_renkan", "Renkan publié"),

    (HdalabRenkan.MODERATED,HdalabRenkan.REJECTED): ("mails/rejected_renkan", "Renkan rejeté"),

    (HdalabRenkan.PUBLISHED, HdalabRenkan.EDITION): ("mails/unpublished_renkan", "Renkan dépublié"),

}

#TODO put into queue

def send_renkan_moderation_messages(sender, **kwargs):

    renkan_state = kwargs.get('instance', None)

    if not renkan_state or (renkan_state.from_state,renkan_state.to_state) not in MAIL_TEMPLATES:

        return

    template_key = (renkan_state.from_state,renkan_state.to_state)

    msg_txt = ""

    msg_html = ""

    subject = ""

    try:

        template_name, subject = MAIL_TEMPLATES[template_key]

#        template = loader.get_template(template_name)

        context = {'renkan_state': renkan_state, 'WEB_URL': settings.WEB_URL}

        msg_html = render_to_string(template_name+".txt", context)

        msg_txt = render_to_string(template_name+".html", context)

    except TemplateDoesNotExist:

        logger.error("Mail template %s for state %s not found", MAIL_TEMPLATES[template_key], HdalabRenkan.STATE_CHOICES_DICT[renkan_state.to_state])

        return

    except Exception as e:

        logger.error("Error rendering template %s for state %s : %r", MAIL_TEMPLATES[template_key], HdalabRenkan.STATE_CHOICES_DICT[renkan_state.to_state], e)

    if msg_txt and msg_html and renkan_state.renkan and renkan_state.renkan.renkan and renkan_state.renkan.renkan.owner and renkan_state.renkan.renkan.owner.email:

        logger.debug("Sending following mail to %s : %s", renkan_state.renkan.renkan.owner.email, msg_txt)

        emsg = EmailMultiAlternatives(subject, strip_tags(msg_txt), settings.DEFAULT_FROM_EMAIL, [renkan_state.renkan.renkan.owner.email])

        emsg.attach_alternative(msg_html, "text/html")

        emsg.send(fail_silently=True)

def queue_renkan_rendering(sender, **kwargs):

    pass

    #check state

    #queue renkan for endering

RENKAN_MODERATION_UUID = "e2f84503-609b-4efa-819d-908e2efe7b1b"

RENKAN_RENDERING_UUID = "b8830748-be2b-479a-8aef-c8d952437b2f"

post_save.connect(send_renkan_moderation_messages, sender=HdalabRenkanStateTransition, dispatch_uid=RENKAN_MODERATION_UUID)