restart services remotely using power-shell script( restart.ps1)

FUNCTION Restart-Service
{
PARAM([STRING]$SERVERNAME=$env:COMPUTERNAME,[STRING]$SERVICENAME) #MSSQLSERVER FOR DEFAULT INSTANCE FOR NAMED INSTANCE MSSQL`$KAT

$SERVICE = GET-SERVICE -COMPUTERNAME $SERVERNAME -NAME $SERVICENAME -ERRORACTION SILENTLYCONTINUE

IF( $SERVICE.STATUS -EQ "RUNNING" )
{
$DEPSERVICES = GET-SERVICE -COMPUTERNAME $SERVERNAME -Name $SERVICE.SERVICENAME -DEPENDENTSERVICES | WHERE-OBJECT {$_.STATUS -EQ "RUNNING"}
IF( $DEPSERVICES -NE $NULL )
{
FOREACH($DEPSERVICE IN $DEPSERVICES)
{
Stop-Service -InputObject (Get-Service -ComputerName $SERVERNAME -Name $DEPSERVICES.ServiceName)
}
}
  Stop-Service -InputObject (Get-Service -ComputerName $SERVERNAME -Name $SERVICE.SERVICENAME) -Force
   if($?)
   {
   Start-Service -InputObject (Get-Service -ComputerName $SERVERNAME -Name $SERVICE.SERVICENAME)
$DEPSERVICES = GET-SERVICE -COMPUTERNAME $SERVERNAME -NAME $SERVICE.SERVICENAME -DEPENDENTSERVICES | WHERE-OBJECT {$_.STATUS -EQ "STOPPED"}
IF( $DEPSERVICES -NE $NULL )
{
FOREACH($DEPSERVICE IN $DEPSERVICES)
{
Start-Service -InputObject (Get-Service -ComputerName $SERVERNAME -Name $DEPSERVICE.SERVICENAME)
}
}
    }
 }
ELSEIF ( $SERVICE.STATUS -EQ "STOPPED" )
{
Start-Service -InputObject (Get-Service -ComputerName $SERVERNAME -Name $SERVICE.SERVICENAME)
$DEPSERVICES = GET-SERVICE -COMPUTERNAME $SERVERNAME -NAME $SERVICE.SERVICENAME -DEPENDENTSERVICES | WHERE-OBJECT {$_.STATUS -EQ "STOPPED"}
IF( $DEPSERVICES -NE $NULL )
{
FOREACH($DEPSERVICE IN $DEPSERVICES)
{
Start-Service -InputObject (Get-Service -ComputerName $SERVERNAME -Name $DEPSERVICE.SERVICENAME)
}
}
}
ELSE
{

"THE SPECIFIED SERVICE DOES NOT EXIST"
}

}