##############################################################################
# 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 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.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(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):
        if not self.request.user.is_authenticated:
            messages.add_message(self.request, messages.ERROR,
                                 'You need to be logged in to book a Pod.')
            return super(BookingFormView, self).form_invalid(form)

        user = self.request.user
        booking = Booking(start=form.cleaned_data['start'],
                          end=form.cleaned_data['end'],
                          purpose=form.cleaned_data['purpose'],
                          opsys=form.cleaned_data['opsys'],
                          installer=form.cleaned_data['installer'],
                          scenario=form.cleaned_data['scenario'],
                          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)
        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'])
        title = 'Booking Details'
        context = super(BookingView, self).get_context_data(**kwargs)
        context.update({'title': title, 'booking': booking})
        return context


class BookingListView(TemplateView):
    template_name = "booking/booking_list.html"

    def get_context_data(self, **kwargs):
        bookings = Booking.objects.filter(end__gte=timezone.now())
        title = 'Search Booking'
        context = super(BookingListView, self).get_context_data(**kwargs)
        context.update({'title': title, 'bookings': bookings})
        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', 'opsys__name',
                                                              'installer__name', 'scenario__name')
        return JsonResponse({'bookings': list(bookings)})