# 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 json
import logging

import falcon

from promenade.config import Configuration
from promenade.control import base
from promenade import exceptions
from promenade import validation

LOG = logging.getLogger(__name__)


class ValidateDesignResource(base.BaseResource):
    def _return_msg(self, resp, status_code, status="Valid", message=""):
        if status_code is falcon.HTTP_200:
            count = 0
            msg_list = []
        else:
            count = 1
            msg_list = [message]
        resp.body = json.dumps({
            "kind": "Status",
            "apiVersion": "v1",
            "metadata": {},
            "status": status,
            "message": message,
            "reason": "Validation",
            "details": {
                "errorCount": count,
                "messageList": msg_list,
            },
            "code": status_code,
        })

    def on_post(self, req, resp):
        href = req.get_param('href', required=True)
        try:
            config = Configuration.from_design_ref(href)
            validation.check_design(config)
            msg = "Promenade validations succeeded"
            return self._return_msg(resp, falcon.HTTP_200, message=msg)
        except exceptions.ValidationException as e:
            msg = "Promenade validations failed: %s" % str(e)
            return self._return_msg(
                resp, falcon.HTTP_400, status="Invalid", message=msg)