# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import datetime
import json
import logging
import os
from django.apps import apps
from django.contrib.auth import get_user_model
from django.contrib.auth.models import Group

from ..models.event import Event
from ..models.eventstatus import EventStatus


class RoleMixin:
    def create_user_for_role(self, role_name, first_name, last_name, password='password'):
        app_config = apps.get_app_config('dav_events')
        var_name = 'groups_{}'.format(role_name)
        if hasattr(app_config.settings, var_name):
            # There are groups configured for this role.
            # Use the first group name of the configured groups.
            group_name = getattr(app_config.settings, var_name)[0]
        else:
            # There are no groups configured for this role.
            # Configure one.
            group_name = role_name
            setting_name = 'groups_{}'.format(role_name)
            setattr(app_config.settings, setting_name, [group_name])

        # Make sure the configured group exists.
        group = Group.objects.get_or_create(name=group_name)[0]

        user_model = get_user_model()
        number = user_model.objects.all().count() + 1
        user_name = 'user{}-{}@localhost'.format(number, role_name)
        user = user_model.objects.create_user(username=user_name, password=password, email=user_name,
                                              first_name=first_name, last_name=last_name)
        user.groups.add(group)

        return user


class EventMixin:
    def get_status_label(self, status_code):
        return EventStatus.objects.get(code=status_code).label

    def gen_event_data(self, exclude_fields=None):
        if exclude_fields is None:
            exclude_fields = []

        data_dirname = 'data'
        data_filename = 'events.json'
        path = os.path.join(os.path.dirname(__file__), data_dirname, data_filename)
        with open(path) as f:
            data_sets = json.load(f)
        for obj_data in data_sets:
            data = {}
            fields_data = obj_data['fields']
            for key in fields_data:
                if key in exclude_fields:
                    continue
                value = fields_data[key]
                if value in (None, ''):
                    continue
                elif key == 'ski_lift' and value is False:
                    continue
                elif key == 'arrivial_previous_day' and value is False:
                    continue
                if key == 'created_at':
                    value = datetime.datetime.strptime(value, '%Y-%m-%dT%H:%M:%S.%fZ')
                elif key in ('pre_meeting_1', 'pre_meeting_2'):
                    value = datetime.datetime.strptime(value, '%Y-%m-%dT%H:%M:%SZ')
                elif key in ('first_day', 'last_day', 'alt_first_day', 'alt_last_day', 'deadline'):
                    value = datetime.datetime.strptime(value, '%Y-%m-%d').date()
                elif key in ('meeting_time', 'departure_time', 'return_departure_time', 'return_arrival_time'):
                    value = datetime.datetime.strptime(value, '%H:%M:%S').time()
                elif key == 'trainer_email':
                    value += '.example.com'
                data[key] = value
            yield data

    def create_event_by_model(self, data=None):
        if data is None:
            exclude_fields = ('owner', 'created_at', 'number', 'planned_publication_date')
            data = next(self.gen_event_data(exclude_fields=exclude_fields))

        event = Event(**data)
        event.save()
        return event

    def submit_event(self, event):
        event.workflow.update_status('submitted', event.owner)
        return event

    def accept_event(self, event, user=None):
        if user is None:
            user = event.owner
        event.workflow.update_status('accepted', user)
        return event

    def confirm_publication_event(self, event, user=None):
        if user is None:
            user = event.owner
        event.workflow.update_status('published', user)
        return event