#
# Copyright 2015, 2016 Hewlett Packard Enterprise Development Company LP
# Copyright 2016 Cray Inc.
#
# 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.views import generic

from ironic_ui.api import ironic

from openstack_dashboard.api.rest import urls

from openstack_dashboard.api.rest import utils as rest_utils


@urls.register
class Nodes(generic.View):

    url_regex = r'ironic/nodes/$'

    @rest_utils.ajax()
    def get(self, request):
        """Get the list of nodes.

        :param request: HTTP request.
        :return: nodes.
        """
        items = ironic.node_list(request)
        return {
            'items': [i.to_dict() for i in items],
        }

    @rest_utils.ajax(data_required=True)
    def post(self, request):
        """Create an Ironic node

        :param request: HTTP request
        """
        params = request.DATA.get('node')
        return ironic.node_create(request, params)

    @rest_utils.ajax(data_required=True)
    def delete(self, request):
        """Delete an Ironic node from inventory

        :param request: HTTP request
        """
        params = request.DATA.get('node')
        return ironic.node_delete(request, params)


@urls.register
class Node(generic.View):

    url_regex = r'ironic/nodes/(?P<node_id>[0-9a-f-]+)$'

    @rest_utils.ajax()
    def get(self, request, node_id):
        """Get information on a specific node.

        :param request: HTTP request.
        :param node_id: Node id.
        :return: node.
        """
        return ironic.node_get(request, node_id).to_dict()

    @rest_utils.ajax(data_required=True)
    def patch(self, request, node_id):
        """Update an Ironic node

        :param request: HTTP request
        :param node_uuid: Node uuid.
        """
        patch = request.DATA.get('patch')
        return ironic.node_update(request, node_id, patch)


@urls.register
class Ports(generic.View):

    url_regex = r'ironic/ports/$'

    @rest_utils.ajax()
    def get(self, request):
        """Get the list of ports associated with a specified node.

        :param request: HTTP request
        :return: List of ports.
        """
        node_id = request.GET.get('node_id')
        items = ironic.node_list_ports(request, node_id)
        return {
            'items': [i.to_dict() for i in items],
        }

    @rest_utils.ajax(data_required=True)
    def post(self, request):
        """Create a network port

        :param request: HTTP request
        :return: Port
        """
        port = request.DATA.get('port')
        return ironic.port_create(request, port).to_dict()

    @rest_utils.ajax(data_required=True)
    def delete(self, request):
        """Delete a network port

        :param request: HTTP request
        """
        params = request.DATA.get('port_uuid')
        return ironic.port_delete(request, params)


@urls.register
class StatesPower(generic.View):

    url_regex = r'ironic/nodes/(?P<node_id>[0-9a-f-]+)/states/power$'

    @rest_utils.ajax(data_required=True)
    def patch(self, request, node_id):
        """Set the power state for a specified node.

        :param request: HTTP request.
        :param node_id: Node name or uuid
        :return: Return code
        """
        state = request.DATA.get('state')
        return ironic.node_set_power_state(request, node_id, state)


@urls.register
class StatesProvision(generic.View):

    url_regex = r'ironic/nodes/(?P<node_uuid>[0-9a-f-]+)/states/provision$'

    @rest_utils.ajax(data_required=True)
    def put(self, request, node_uuid):
        """Set the provision state for a specified node.

        :param request: HTTP request.
        :param node_id: Node uuid
        :return: Return code
        """
        verb = request.DATA.get('verb')
        return ironic.node_set_provision_state(request, node_uuid, verb)


@urls.register
class Maintenance(generic.View):

    url_regex = r'ironic/nodes/(?P<node_id>[0-9a-f-]+)/maintenance$'

    @rest_utils.ajax()
    def patch(self, request, node_id):
        """Put a specified node into maintetance state

        :param request: HTTP request.
        :param node_id: Node name or uuid
        :return: Return code
        """
        maint_reason = request.DATA.get('maint_reason')
        return ironic.node_set_maintenance(
            request,
            node_id,
            'on',
            maint_reason=maint_reason)

    @rest_utils.ajax()
    def delete(self, request, node_id):
        """Take a specified node out of the maintetance state

        :param request: HTTP request.
        :param node_id: Node name or uuid
        :return: Return code
        """
        return ironic.node_set_maintenance(request, node_id, 'off')


@urls.register
class Validate(generic.View):

    url_regex = r'ironic/nodes/(?P<node_id>[0-9a-f-]+)/validate$'

    @rest_utils.ajax()
    def get(self, request, node_id):
        """Validate a specified node

        :param request: HTTP request.
        :param node_id: Node name or uuid
        :return: Dictionary of interface statuses
        """
        return ironic.node_validate(request, node_id)


@urls.register
class Drivers(generic.View):

    url_regex = r'ironic/drivers/$'

    @rest_utils.ajax()
    def get(self, request):
        """Get the list of drivers

        :param request: HTTP request
        :return: drivers
        """
        items = ironic.driver_list(request)
        return {
            'items': [i.to_dict() for i in items]
        }


@urls.register
class DriverProperties(generic.View):

    url_regex = r'ironic/drivers/(?P<driver_name>[0-9a-zA-Z_-]+)/properties$'

    @rest_utils.ajax()
    def get(self, request, driver_name):
        """Get the properties associated with a specified driver

        :param request: HTTP request
        :param driver_name: Driver name
        :return: Dictionary of properties
        """
        return ironic.driver_properties(request, driver_name)