# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import logging
import uuid
from django.contrib.auth import get_user_model
from django.urls import reverse
from django.db import models
from django.utils import timezone
from django.utils.translation import gettext, gettext_lazy as _

from .event import Event

logger = logging.getLogger(__name__)


class OneClickAction(models.Model):
    COMMANDS = (
        ('EVENT_LIST', 'login and go to event list (user id)'),
        ('EVENT_STATUS_UPDATE', 'update event status (event id,status code,user id)'),
    )

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    created_at = models.DateTimeField(auto_now_add=True)

    allow_repeat = models.BooleanField(default=False)

    done = models.BooleanField(default=False)
    done_at = models.DateTimeField(blank=True,
                                   null=True)

    command = models.CharField(max_length=254, choices=COMMANDS)

    parameters = models.TextField(blank=True)

    class Meta:
        verbose_name = _('One-Click-Action')

    def __str__(self):
        s = '{command}({parameters}) - {description}'.format(description=self.get_command_display(),
                                                             command=self.command,
                                                             parameters=self.parameters)
        if self.done and not self.allow_repeat:
            s += ' - done'
        return s

    def get_absolute_url(self):
        return reverse('dav_events:action_run', kwargs={'pk': self.pk})

    def run(self):
        result = {}
        if self.done and not self.allow_repeat:
            result['context'] = {
                'status': 'warning',
                'message': gettext('Diese Aktion hast du bereits ausgeführt.'),
            }
            return result

        logger.info('OneClickAction.run(): %s(%s)', self.command, self.parameters)
        if self.command == 'EVENT_LIST':
            try:
                user_id = self.parameters
                user = get_user_model().objects.get(id=user_id)
                url = reverse('dav_events:list')
                result['location'] = url
                result['login'] = user
            except Exception as e:
                message = str(e)
                logger.error('OneClickAction.run(): %s(%s): %s', self.command, self.parameters, message)
                result['context'] = {
                    'status': 'danger',
                    'message': message,
                }
        elif self.command == 'EVENT_STATUS_UPDATE':
            try:
                event_id, status_code, user_id = self.parameters.split(',')
                event = Event.objects.get(id=event_id)
                user = get_user_model().objects.get(id=user_id)

                flag = event.flags.filter(status__code=status_code).first()
                if flag:
                    message = (gettext('Der Status wurde bereits'
                                       ' am %(date)s'
                                       ' von %(user)s'
                                       ' auf \'%(status)s\' gesetzt.') % {
                        'status': flag.status.label,
                        'date': timezone.localtime(flag.timestamp).strftime('%d.%m.%Y %H:%M:%S'),
                        'user': flag.user.get_full_name(),
                    })
                else:
                    flag = event.workflow.update_status(status_code, user)
                    message = (gettext('Der Status wurde auf \'%(status)s\' gesetzt.') %
                               {'status': flag.status.label})

                result['context'] = {
                    'status': 'success',
                    'message': message,
                }

                self.done = True
                self.done_at = timezone.now()
                self.save()
            except Exception as e:
                message = str(e)
                logger.error('OneClickAction.run(): %s(%s): %s', self.command, self.parameters, message)
                result['context'] = {
                    'status': 'danger',
                    'message': message,
                }
        else:
            result['context'] = {
                'status': 'danger',
                'message': gettext('Invalid Command. Code on fire!'),
            }

        return result