# -*- coding: utf-8 -*-
# Copyright (c) 2022 Intel Corporation
#
# 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.
"""Defines data structure of request object."""
from dataclasses import dataclass
from enum import Enum
from subprocess import Popen
from typing import Any, Callable, Iterable, Optional


class _RequestType(Enum):
    """Define possible types of request object."""

    SCHEDULE = "add new job to queue"
    ABORT = "abort process of specified job if exists else kill it right after it spawns"
    DELETE_JOB = "delete job from job dict"
    ADD_PROCESS_HANDLE = "add process handle to job instance"


@dataclass(frozen=True)
class _Request:
    """Data structure to store information about job managment requests."""

    type: _RequestType
    job_id: str
    target: Optional[Callable] = None
    args: Optional[Iterable[Any]] = None
    request_id: Optional[str] = None
    process_handle: Optional[Popen] = None
