# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#  License for the specific language governing permissions and limitations
#  under the License.

from django.utils.translation import ugettext_lazy as _

from horizon import exceptions
from horizon import forms
from horizon import workflows

import freezer_ui.api.api as freezer_api


class SessionConfigurationAction(workflows.Action):
    session_id = forms.ChoiceField(
        help_text=_("Set a session to attach this job"),
        label=_("Session Name"),
        required=True)

    job_id = forms.CharField(
        widget=forms.HiddenInput(),
        required=True)

    def populate_session_id_choices(self, request, context):
        sessions = []
        try:
            sessions = freezer_api.session_list(request)
        except Exception:
            exceptions.handle(request, _('Error getting session list'))

        sessions = [(s.session_id, s.description) for s in sessions]
        sessions.insert(0, ('', _('Select A Session')))
        return sessions

    class Meta:
        name = _("Sessions")
        slug = "sessions"


class SessionConfiguration(workflows.Step):
    action_class = SessionConfigurationAction
    contributes = ('session_id',
                   'job_id')


class AttachJobToSession(workflows.Workflow):
    slug = "attach_job"
    name = _("Attach To Session")
    finalize_button_name = _("Attach")
    success_message = _('Job saved successfully.')
    failure_message = _('Unable to attach to session.')
    success_url = "horizon:freezer_ui:jobs:index"
    default_steps = (SessionConfiguration,)

    def handle(self, request, context):
        try:
            freezer_api.add_job_to_session(
                request,
                context['session_id'],
                context['job_id'])
            return True
        except Exception:
            exceptions.handle(request)
            return False