WOL with DHCP utility

WOL.ps1

param(
[string]$HostName,
[string]$Mac,
[string]$ip,
[switch]$All,
[switch]$broadcast,
[ValidateSet(“Site1”,”Site2”)][string]$site = "Site1"

)

$WOLpath = "\\server\c$\Scripts\WOL\"
$subnetmask = "255.255.0.0"

$scope, $broadcastIp  = switch($site){
                                "Site1"  {@("192.168.0.0", "192.168.255.255")}
                                "Site2" {@("10.10.0.0"  , "10.10.255.255"  )}
}

function WOL{
param(
[Parameter(ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)]
[string]
$ip,

[Parameter(ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)]
[string]
$Mac,

[Parameter(ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)]
[string]
$subnetmask
)

begin{
    pushd $WOLpath
}
process{
    Write-Output "Attempting to Wake $HostName on $ip, $Mac"
    "./WolCmd.exe $Mac $ip $subnetmask"
    ./WolCmd.exe $Mac $ip $subnetmask
}
end{
    popd
}
 
}


if($All){
    Write-Output "Attempting to Wake all computers in $scope"
    $computers = Invoke-Command -ComputerName $server -ScriptBlock {Get-DhcpServerv4Lease -scope $using:scope -AllLeases} | Select  @{N='ip';E={$_.IPAddress.IPAddressToString}}, @{N='Mac';E={$_.ClientID}}, @{N='subnetmask';E={$subnetmask}}  
    $computers | WOL

}
#Something not quite right with this.  Script seems take this logic tree fork even id $Mac is not set.
<#elseif($Mac -ne $null){
    if($ip -eq $null -or $ip -eq ""){$ip = $broadcastIp}
    Write-Output "$Mac $ip $subnetmask"
    WOL -Mac $Mac -ip $ip -subnetmask $subnetmask
        $scope = 192.168.0.0
}
#>
else{

        if($HostName -eq $null -or $HostName -eq ""){

            Write-Output "Please give a hostname or use the -all switch"
        
            }
            else{
                    if(Test-Connection $HostName -ErrorAction Ignore){
                            Write-Output "$Mac $ip $subnetmask"
                            Write-Output "$HostName is already on"
                    }
                    else{
                            Write-Output "Looking for $HostName in DHCP"
            
                            $ip, $Mac = Invoke-Command -ComputerName $server -ScriptBlock {Get-DhcpServerv4Lease -scope $using:scope -AllLeases |? {$_.HostName -like "$using:HostName*"}} | foreach{@($_.IPAddress,$_.ClientID.replace("-",""))} 
            
                            if($Mac -eq $null -or $Mac -eq "")
                            {
                                    Write-Output "Unable to find $hostname in dhcp"
            
                            }
                            else{
                                    if($broadcast){$ip = $broadcastIp}
                                    Write-Output "$Mac $ip $subnetmask"
                                    WOL -Mac $Mac -ip $ip -subnetmask $subnetmask
                                
                            }
                    }
            }
}