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# ############################################################################
# Copyright (c) 2017 Huawei Technologies Co.,Ltd 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
# ############################################################################
import uuid
import logging

from api.utils.common import result_handler
from api.database.v1.handlers import AsyncTaskHandler
from yardstick.common import constants as consts

LOG = logging.getLogger(__name__)
LOG.setLevel(logging.DEBUG)


def default(args):
    return _get_status(args)


def _get_status(args):
    try:
        task_id = args['task_id']
    except KeyError:
        return result_handler(consts.API_ERROR, 'task_id must be provided')

    try:
        uuid.UUID(task_id)
    except ValueError:
        return result_handler(consts.API_ERROR, 'invalid task_id')

    asynctask_handler = AsyncTaskHandler()
    try:
        asynctask = asynctask_handler.get_task_by_taskid(task_id)
    except ValueError:
        return result_handler(consts.API_ERROR, 'invalid task_id')

    def _unfinished():
        return result_handler(consts.TASK_NOT_DONE, {})

    def _finished():
        return result_handler(consts.TASK_DONE, {})

    def _error():
        return result_handler(consts.TASK_FAILED, asynctask.error)

    status = asynctask.status
    LOG.debug('Task status is: %s', status)

    if status not in [consts.TASK_NOT_DONE,
                      consts.TASK_DONE,
                      consts.TASK_FAILED]:
        return result_handler(consts.API_ERROR, 'internal server error')

    switcher = {
        consts.TASK_NOT_DONE: _unfinished,
        consts.TASK_DONE: _finished,
        consts.TASK_FAILED: _error
    }

    return switcher.get(status)()