##############################################################################
# Copyright (c) 2016 Max Breitenfeldt and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################


from datetime import timedelta

from django.conf import settings
from django.contrib import messages
from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import JsonResponse
from django.shortcuts import get_object_or_404
from django.shortcuts import redirect
from django.urls import reverse
from django.utils import timezone
from django.views import View
from django.views.generic import FormView
from django.views.generic import TemplateView
from jira import JIRAError

from account.jira_util import get_jira
from booking.forms import BookingForm
from booking.models import Booking
from dashboard.models import Resource


def create_jira_ticket(user, booking):
    jira = get_jira(user)
    issue_dict = {
        'project': 'PHAROS',
        'summary': str(booking.resource) + ': Access Request',
        'description': booking.purpose,
        'issuetype': {'name': 'Task'},
        'components': [{'name': 'POD Access Request'}],
        'assignee': {'name': booking.resource.owner.username}
    }
    issue = jira.create_issue(fields=issue_dict)
    jira.add_attachment(issue, user.userprofile.pgp_public_key)
    jira.add_attachment(issue, user.userprofile.ssh_public_key)
    booking.jira_issue_id = issue.id
    booking.save()


class BookingFormView(LoginRequiredMixin, FormView):
    template_name = "booking/booking_calendar.html"
    form_class = BookingForm

    def dispatch(self, request, *args, **kwargs):
        self.resource = get_object_or_404(Resource, id=self.kwargs['resource_id'])
        return super(BookingFormView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        title = 'Booking: ' + self.resource.name
        context = super(BookingFormView, self).get_context_data(**kwargs)
        context.update({'title': title, 'resource': self.resource})
        return context

    def get_success_url(self):
        return reverse('booking:create', kwargs=self.kwargs)

    def form_valid(self, form):
        user = self.request.user
        if not user.userprofile.ssh_public_key or not user.userprofile.pgp_public_key:
            messages.add_message(self.request, messages.INFO,
                                 'Please upload your private keys before booking')
            return redirect('account:settings')
        booking = Booking(start=form.cleaned_data['start'], end=form.cleaned_data['end'],
                          purpose=form.cleaned_data['purpose'], resource=self.resource,
                          user=user)
        try:
            booking.save()
        except ValueError as err:
            messages.add_message(self.request, messages.ERROR, err)
            return super(BookingFormView, self).form_invalid(form)
        except PermissionError as err:
            messages.add_message(self.request, messages.ERROR, err)
            return super(BookingFormView, self).form_invalid(form)
        try:
            if settings.CREATE_JIRA_TICKET:
                create_jira_ticket(user, booking)
        except JIRAError:
            messages.add_message(self.request, messages.ERROR, 'Failed to create Jira Ticket. '
                                                               'Please check your Jira '
                                                               'permissions.')
            booking.delete()
            return super(BookingFormView, self).form_invalid(form)
        messages.add_message(self.request, messages.SUCCESS, 'Booking saved')
        return super(BookingFormView, self).form_valid(form)


class BookingView(TemplateView):
    template_name = "booking/booking_detail.html"

    def get_context_data(self, **kwargs):
        booking = get_object_or_404(Booking, id=self.kwargs['booking_id'])
        jira_issue = booking.get_jira_issue()
        title = 'Booking Details'
        context = super(BookingView, self).get_context_data(**kwargs)
        context.update({'title': title, 'booking': booking, 'jira_issue': jira_issue})
        return context


class ResourceBookingsJSON(View):
    def get(self, request, *args, **kwargs):
        resource = get_object_or_404(Resource, id=self.kwargs['resource_id'])
        bookings = resource.booking_set.get_queryset().values('id', 'start', 'end', 'purpose',
                                                              'jira_issue_status')
        return JsonResponse({'bookings': list(bookings)})