[CmdletBinding()]
param(
    [int]$CUSTOMER_ID,
    [int]$SOFTWARE_ID=101,
    [string]$AGENT_FILENAME='EmberkomAgentSetup.exe'
)

## Immediately delete this script from disk
Try { Remove-Item $MyINvocation.InvocationName -Force }
Catch { Write-Output "This script tried to delete itself but failed!" }

## Build the path for $AGENT_INSTALLER 
$TEMP = [System.IO.Path]::GetTempPath()
$AGENT_INSTALLER = "${TEMP}\${AGENT_FILENAME}"

## Make sure the CUSTOMER_ID is specified
If ( $CUSTOMER_ID )
{
    ## Make sure we need to install the agent
    If ( !(Test-Path 'HKLM:SOFTWARE\N-able Technologies\NcentralAsset') -and !(Test-Path 'SOFTWARE\Wow6432Node\N-able Technologies\NcentralAsset'))
    {
        ## Build the AGENT_URL
        $AGENT_URL = "{0}{1}{2}{3}" -f 'https://manage.emberkom.com/dms/FileDownload?customerID=',$CUSTOMER_ID.ToString(),'&softwareID=',$SOFTWARE_ID.ToString()

        ## Delete $AGENT_INSTALLER if it already exists
        If ( Test-Path $AGENT_INSTALLER )
        {
            Try { Remove-Item $AGENT_INSTALLER -Force }
            Catch { Write-Output $_.Exception.Message }
        }

        ## Download the agent installer
        Try
        {
            [System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}
            (New-Object System.Net.WebClient).DownloadFile($AGENT_URL, $AGENT_INSTALLER)
        }
        Catch { Write-Output $_.Exception.Message ; Exit }

        ## Install the agent
        Try { Start-Process $AGENT_INSTALLER -ArgumentList '/quiet /passive' -Wait }
        Catch { Write-Output $_.Exception.Message }

        ## Remove the agent installer
        If ( Test-Path $AGENT_INSTALLER )
        {
            Try { Remove-Item -Path $AGENT_INSTALLER -Force }
            Catch { Write-Output $_.Exception.Message }
        }
    } Else { Write-Output "The agent is already installed on this endpoint." }
} Else { Write-Output "No CUSTOMER_ID was specified!" }