param (
[int]$TestMode = 1,
[int]$DeleteOlderThanMonths = 6,
[string]$DeleteFileExtension = ".jpg",
[string]$Root_Folder = "C:\",
[string]$Logfile = "Log.txt"
)

#writes log messages
Function LogWrite
{
   Param ([string]$logstring)
   $currentdate = get-date -format "M-d-yyyy HH:MM"
   Add-content $Logfile -value "$currentdate | $logstring"
}

#checks if zip file contains only DeleteFileExtension file type
Function CanZIPbeDeleted($zipFilePath)
{
  [int]$canBeDeleted = 1;

  try { 
      $zipArchive = Get-Item -Path $zipFilePath | ForEach-Object { 
         (New-Object -ComObject Shell.Application).NameSpace($_.FullName)
      }
  
      foreach($item in $zipArchive.items())
      {
        if(!$item.Path.EndsWith($DeleteFileExtension))
        {
           $canBeDeleted = 0
           $msg = "$zipFilePath cannot be deleted as it contains non $DeleteFileExtension file"
           LogWrite $msg
           Write-Host $msg -foreground Green 
           return 0
        }
     }   
   } 
   catch { 
       $msg = "Unexpected Error. Error details: $_.Exception.Message"
       LogWrite $msg
       Write-Host $msg -foreground Red 
       return 0
   } 
 
    return $canBeDeleted;
}

#deletes the file
Function DeleteFile($filePathToDelete)
{
  try
  { 
     if($TestMode -eq 0)
     {
       Remove-Item $filePathToDelete
     }
     
     $size = (Get-Item -Path $filePathToDelete | Select-Object Name, @{Name="Size";Expression={[string]::Format("{0:0.00} MB", $_.Length / 1MB)}}).Size
     $msg = "File deleted ($size): $filePathToDelete"
     LogWrite $msg 
     Write-Host $msg -foreground "magenta"  
  } 
  catch { 
     $msg = "Unexpected Error. Error details: $_.Exception.Message"
     LogWrite $msg 
     Write-Host $msg -foreground Red 
   }    
}

 
 get-childitem -Path $Root_Folder –recurse |  
 where-object { 
    $_.CreationTime -lt (get-date).addMonths(-$DeleteOlderThanMonths) -and ($_.FullName.EndsWith($DeleteFileExtension) -or $_.FullName.EndsWith(".zip"))
  } | 
 Foreach-Object {
 
    if ($_.FullName.EndsWith(".zip"))
    {
       $canDeleteZip = CanZIPbeDeleted $_.FullName
       if($canDeleteZip -eq 1)
       {
          DeleteFile $_.FullName
       }
    }
    else
    {
       DeleteFile $_.FullName
    }
 }