#############################
#
#      Backup Intranet
#
#############################

# Setting path for vboxmanage
$Env:Path = "c:\Program Files\Oracle\VirtualBox\"

# creating backup paths
$remoteBackupPath = "\\freenas\programas\VM_Backup"
$backupDriveLetterMount = "L"
$backupFilename = $backupDriveLetterMount + ":\" + [string](Get-Date).Year + [string](Get-Date).Month + [string](Get-Date).Day + "_Intranet_Backup.ova"
$vmName = "2018_intranet"

# mounting backup path New-PSDrive -Name L -Root \\freenas\programas\VM_Backup\ -Persist -PSProvider FileSystem
New-PSDrive -Name $backupDriveLetterMount -Root $remoteBackupPath -Persist -PSProvider FileSystem

# stoping vm
$vmanagerStopVM = "VBoxManage.exe"
$vmanagerStopVM += @(" controlvm ")
$vmanagerStopVM += @($vmName)
$vmanagerStopVM += @(" poweroff")
Write-host "$vmanagerStopVM"
Invoke-Expression "$vmanagerStopVM"

#backing up vm
$vmanagerBackup = "VBoxManage.exe"
$vmanagerBackup += @(" export ")
$vmanagerBackup += @($vmName)
$vmanagerBackup += @(" --ovf10")
$vmanagerBackup += @(" -o ")
$vmanagerBackup += @([string]$backupFilename)
Write-host "$vmanagerBackup"
Invoke-Expression "$vmanagerBackup"

# start vm
$vmanagerStart = "VBoxManage.exe"
$vmanagerStart += @(" startvm ")
$vmanagerStart += @($vmName)
$vmanagerStart += @(" -type headless")
Write-host "$vmanagerStart"
Invoke-Expression "$vmanagerStart"

# remove old Backups
$backupFileCount = ( Get-ChildItem -Filter *.ova $remoteBackupPath | Measure-Object ).Count
$backupPath = $backupDriveLetterMount + ":\"

DO
{
    $Item = Get-ChildItem -Path $remoteBackupPath -Filter *.ova | Sort CreationTime | select -First 1            
    Write-Host "Oldest file/folder in $FolderName is $($Item.FullName)"
    Remove-Item -Path $($Item.FullName) -Force
    $backupFileCount = ( Get-ChildItem -Filter *.ova $remoteBackupPath | Measure-Object ).Count

} While ($backupFileCount -gt 3)

# removing backup path
Remove-PSDrive -Name $backupDriveLetterMount