Is there a way to tell when a site is created and ready to use when creating it using powershell?

I'm creating a number of sites using a powershell script. Now, when each of the sites is finished, I want to activate features on it.

My problem is that when I do this, it takes some time before the site is ready. Especially in SharePoint Online it is hard to predict when the site is ready. I've tried using time-loops, but I was wondering if there is a status setting somewhere that I can query instead.

Any thoughts?

Actually we solved the problem. The siteCreationOperation has a property named isComplete. Iterate over this and pick up the boolean for further processing :)

https://msdn.microsoft.com/en-us/library/microsoft.online.sharepoint.tenantadministration.tenant.createsite(v=office.15).aspx

    #Create the site using the properties
    $tenant.CreateSite($properties) | Out-Null
    ...
    ...
    $siteCreationOperation = $tenant.CreateSite($properties)
    $ctx.Load($siteCreationOperation)
    ...
    ...
    #Create the site in the tennancy
    ...
    ...
    do
    {
        ...
        ...
        $ctx.Load($siteCreationOperation)
        $ctx.ExecuteQuery()
        Write-Host $siteCreationOperation.IsComplete
        ...
        ...
    }
    ...
    while (!$siteCreationOperation.IsComplete)
    ...