# Copyright 2017 AT&T Intellectual Property.  All other rights reserved.
#
# 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.
import falcon

from .designs import DesignsResource
from .designs import DesignResource
from .designs import DesignsPartsResource
from .designs import DesignsPartsKindsResource
from .designs import DesignsPartResource
from .tasks import TasksResource
from .tasks import TaskResource
from .nodes import NodesResource
from .health import HealthResource
from .bootaction import BootactionUnitsResource
from .bootaction import BootactionFilesResource
from .bootaction import BootactionResource
from .validation import ValidationResource

from .base import DrydockRequest, BaseResource
from .middleware import AuthMiddleware, ContextMiddleware, LoggingMiddleware


def start_api(state_manager=None, ingester=None, orchestrator=None):
    """
    Start the Drydock API service

    :param state_manager:   Instance of drydock_provisioner.statemgmt.manager.DesignState for accessing
                            state persistence
    :param ingester:        Instance of drydock_provisioner.ingester.ingester.Ingester for handling design
                            part input
    :param orchestrator:    Instance of drydock_provisioner.orchestrator.Orchestrator for managing tasks
    """
    control_api = falcon.API(
        request_type=DrydockRequest,
        middleware=[
            AuthMiddleware(),
            ContextMiddleware(),
            LoggingMiddleware()
        ])

    control_api.add_route('/versions', VersionsResource())

    # v1.0 of Drydock API
    v1_0_routes = [
        # API for managing orchestrator tasks
        ('/health', HealthResource()),
        ('/tasks',
         TasksResource(state_manager=state_manager,
                       orchestrator=orchestrator)),
        ('/tasks/{task_id}', TaskResource(state_manager=state_manager)),

        # API for managing site design data
        ('/designs', DesignsResource(state_manager=state_manager)),
        ('/designs/{design_id}',
         DesignResource(
             state_manager=state_manager, orchestrator=orchestrator)),
        ('/designs/{design_id}/parts',
         DesignsPartsResource(state_manager=state_manager, ingester=ingester)),
        ('/designs/{design_id}/parts/{kind}',
         DesignsPartsKindsResource(state_manager=state_manager)),
        ('/designs/{design_id}/parts/{kind}/{name}',
         DesignsPartResource(
             state_manager=state_manager, orchestrator=orchestrator)),

        # API to list current MaaS nodes
        ('/nodes', NodesResource()),
        # API for nodes to discover their boot actions during curtin install
        ('/bootactions/nodes/{hostname}/units',
         BootactionUnitsResource(
             state_manager=state_manager, orchestrator=orchestrator)),
        ('/bootactions/nodes/{hostname}/files',
         BootactionFilesResource(
             state_manager=state_manager, orchestrator=orchestrator)),
        ('/bootactions/{action_id}',
         BootactionResource(
             state_manager=state_manager, orchestrator=orchestrator)),

        # API to validate schemas
        ('/validatedesign',
         ValidationResource(
             state_manager=state_manager, orchestrator=orchestrator)),
    ]

    for path, res in v1_0_routes:
        control_api.add_route('/api/v1.0' + path, res)

    return control_api


class VersionsResource(BaseResource):
    """
    Lists the versions supported by this API
    """

    def on_get(self, req, resp):
        resp.body = self.to_json({
            'v1.0': {
                'path': '/api/v1.0',
                'status': 'stable'
            }
        })
        resp.status = falcon.HTTP_200