#!/bin/bash

# Copyright 2021 Google LLC
#
# 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.

# This is a fake implementation of systemctl service

main() {
    # perform the following action when the command is
    # systemctl is-active <service.name>
    if [[ $1 == "is-active" ]]; then
        IFS=',' read -r -a array <<< $2
        # exit with status code 1 when expected error is not nil
        if [[ "${array[2]}" != "<nil>" ]]; then
            exit 1
        # if the expected state of systemd service is active,
        # echo active
        elif [[ "${array[1]}" == "true" ]]; then
            echo "active"
        # if no error is expected and status is not active, return success
        else
            return 0
        fi
    # perform the following action when the command is
    # systemctl start/stop <service.name>
    elif [[ $1 == "start" || $1 == "stop" ]]; then
        IFS=',' read -r -a array <<< $2
        # exit with status code 1 when expected error is not nil
        if [[ "${array[1]}" != "<nil>" ]]; then
            exit 1
        else
        # if no error is expected, return success
            return 0
        fi
    # exit with status code 1 when any other command is used
    else
        exit 1
    fi
}

main $@