<#
Author: Gabe Kerntke
Date: 03-13-2024

.Synopsis

.Modified
2024-03-13 (GabeK) - Original script created

#>

######################
###    Variables   ###
######################
$Name = "SaRAcmd"
$FileName = $Name + ".exe"
$EPCacheLocal = "$Env:windir\NCentral\Cache"
$Global:EPCacheLocalLocation = $ENV:EPCacheLocal + '\' + $Name + '\' + $FileName
$InstallParameters = "-S OfficeScrubScenario -AcceptEula -OfficeVersion All" 

######################
###    Functions   ###
######################

#Function checks for 32 or 64 bit processor and then pulls list of applications accordingly
Function Get-Software ($CPU = $ENV:PROCESSOR_ARCHITECTURE) {
    If ($CPU -eq 'AMD64') { 
        $64bit = Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* 
        $32bit = Get-ItemProperty HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*
        $32bit + $64bit
    } 
    Else { Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* }  
}

Function ExitCode {
    If ($ExitCode -eq 0) {
        Write-Host "$App_Name or $App_Name2 successfully uninstalled, recommend rebooting."
        Start-Sleep 5
        Remove-Item "$EPCacheLocal\$Name" -Force -Recurse
        Remove-Item "$EPCacheLocal\SaRa.zip" -Force
    }
    ElseIf ($ExitCode -eq 3010) {
        Write-Host "$App_Name or $App_Name2 successfully removed, but requires a reboot to complete."
        Start-Sleep 5
        Remove-Item "$EPCacheLocal\$Name" -Force -Recurse
        Remove-Item "$EPCacheLocal\SaRa.zip" -Force
    }
    Else {
        Write-Host `n
        Start-Sleep 5
        Write-Host "$App_Name or $App_Name2 failed to uninstall.  Exit Code:" + $ExitCode
        Remove-Item "$EPCacheLocal\$Name" -Force -Recurse
        Remove-Item "$EPCacheLocal\SaRa.zip" -Force
    }
}

Function Check {
    $App_Name = "Microsoft 365"
    $Applist = Get-Software | Where-Object { $_.DisplayName -like "*$App_Name*" }
    $App_Name2 = "Microsoft Office"
    $Applist2 = Get-Software | Where-Object { $_.DisplayName -like "*$App_Name2*" }
    If ($Applist.DisplayName -like "*$App_Name*") {
        Write-Host "$App_Name is installed, proceeding with uninstall."
        Download
    }
    ElseIf ($Applist2.DisplayName -like "*$App_Name2*") {
        Write-Host "$App_Name2 is installed, proceeding with uninstall."
        Download
    }
    Else {
        Write-Host "$App_Name or $App_Name2 is not installed, exiting script."
    }
}

Function Download {
    Invoke-WebRequest -UseBasicParsing "https://aka.ms/SaRA_EnterpriseVersionFiles" -OutFile "$EPCacheLocal\SaRa.zip"
    Extract
}
    
Function Extract {
    Expand-Archive -Path "$EPCacheLocal\SaRa.zip" -DestinationPath "$EPCacheLocal\$Name"
    Run
}

Function Run {
    $Install = Start-Process $EPCacheLocalLocation -ArgumentList $InstallParameters -Wait -PassThru
    $ExitCode = ($Install).ExitCode           
    ExitCode
}

######################
###  Script start  ###
######################
Check