Data Store Removal

$vCenter = Read-Host "enter the vCenter name:"
$pas1 = Get-Credential
Connect-VIServer $vCenter -Credential $pas1
$Name_DS = Read-Host "enter the datastore name:"
$datastore_name = "$Name_DS"
$Datastore_var = Get-View -ViewType datastore -Filter @{"name" = $datastore_name}
$datastore = New-Object VMware.Vim.ManagedObjectReference
$datastore.type = "Datastore"
$Datastore_var1 = $datastore_var.MoRef
$datastore_name = "$Name_DS"
$DS_detail = Get-View -ViewType datastore -Filter @{"name" = $datastore_name}
$DS_var = $DS_detail.summary.Url
$DS_var2 = $DS_var.Split('/')[5]
$DETA1 = Read-Host "provide the cluster name:"
$host_name123 = $DETA1
$host_cluster = Get-Cluster $host_name123 | Get-VMHost |select name
foreach($host_data00 in $host_cluster)
{
$Host_data1 = $Host_data00.Name
$Host_details01 = Get-VIEw -ViewType hostsystem -Filter @{"name" = $Host_data1}
$Host_var001 =  $Host_details01.ConfigManager.StorageSystem
$Host_var98 = Get-View -Id $Host_var001
$Host_var98.UnmountVmfsVolume("$DS_var2")
}
$naa0 = $Datastore_var.info.Vmfs.extent |select diskname
$naa1 = $naa0.DiskName
$datastore = New-Object VMware.Vim.ManagedObjectReference
$datastore.type = "Datastore"
$Host_var11 = $Host_details01.ConfigManager.DatastoreSystem
$Host_var22 = Get-View -Id $Host_var11
$Host_var22.RemoveDatastore($Datastore_var1)
 write-host "~~~~~~~~~~~~~     The DS removal is completed please the check the rescan is completed for all the host in the custer in the vCenter    ~~~~~~~~~~~~~~" -foregroundcolor Magenta
 write-host " "
 write-host "  1.   Press 1 to proceed for dtaching the Lun from device level" -foregroundcolor red
 write-host " "
 write-host "  2.   Press 2 to Exit" -foregroundcolor red
 write-host " "
 write-host "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" -foregroundcolor Magenta
 write-host " "
 $opt=(Read-Host "Please Enter your option  :")
 if($opt -eq "1")
 {
 $cluster = $DETA1
 Write-Host "please confrom the cluster name before lun detaching"
 write-host "  1.   Press 1 if the cluster name is correct : $cluster " -foregroundcolor red
 write-host "  2.   Press 2 if you want to exit" -foregroundcolor red
 $opt1 =(Read-Host "Please Enter your option  :")
 $SCSI_LUN = get-scsilun -vmhost $Host_data1 -canonicalname "$naa1" | select key
 if($opt1 -eq "1")
 {
 foreach($host_data in $host_cluster)
{
$Host_data33 = $Host_data.Name
$Host_details00 = Get-VIEw -ViewType hostsystem -Filter @{"name" = $Host_data33}
$Host_var000 =  $Host_details00.ConfigManager.StorageSystem
$Host_var99 = Get-View -Id $Host_var000
$SCSI_LUN_var = $SCSI_LUN.key
$SCSI_LUN_var1 = $SCSI_LUN_var.Split('-')[2]
$Host_var99.DetachScsiLun("$SCSI_LUN_var1")
}
 }
 if($opt1 -eq "2")
 {
Disconnect-VIServer $vCenter -Confirm:$false
exit
}
 }
 if($opt -eq "2")
 {
Disconnect-VIServer $vCenter -Confirm:$false
exit
}