// Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"). You may not
// use this file except in compliance with the License. A copy of the
// License is located at
//
// http://aws.amazon.com/apache2.0/
//
// or in the "license" file accompanying this file. This file 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.

// Package rebooter provides utilities used to reboot a machine.
package rebooter

import (
	"github.com/aws/amazon-ssm-agent/agent/log"
)

type RebootType string

// Add the interface about reboot type
type IRebootType interface {
	GetChannel() chan RebootType

	RebootMachine(log log.T) error
}

type SSMRebooter struct {
}

const (
	RebootRequestTypeReboot RebootType = "reboot"
	RebootRequestTypeUpdate RebootType = "update"
)

var ch = make(chan RebootType)

func (r *SSMRebooter) GetChannel() chan RebootType {
	return ch
}

// RebootMachine reboots the machine
func (r *SSMRebooter) RebootMachine(log log.T) error {
	if err := reboot(log); err != nil {
		return err
	}

	return nil
}

func RequestPendingReboot(log log.T) bool {
	//non-blocking send
	select {
	case ch <- RebootRequestTypeReboot:
		log.Info("successfully requested a reboot")
		return true
	default:
		log.Info("reboot has already been requested...")
		return false
	}
}