#Requires -Version 5.1
<#
    JbTecWiz Support Centre -- read-only diagnostic

    Fault : Printing from Office fails, prints blank, or goes to the wrong printer
    Source: https://jbtecwiz.com/support/win-office-printing

    This script CHANGES NOTHING. It runs only the inspection commands
    from the write-up -- the Get-, Test- and Resolve- calls that
    establish which cause is in play -- and prints what each returned.
    Anything that writes, deletes, starts or stops is excluded by
    construction, not by judgement.

    Read the output alongside the write-up, then pick the fix that
    matches. Each fix has its own script on the same page.
#>

[CmdletBinding()] param([switch]$Transcript)
$ErrorActionPreference = 'Continue'

if ($Transcript) {
    $log = Join-Path $env:USERPROFILE ("jbtecwiz-win-office-printing-" + (Get-Date -Format yyyyMMdd-HHmmss) + ".txt")
    Start-Transcript -Path $log | Out-Null
    Write-Host ('  Saving a transcript to ' + $log)
}

function Write-Rule { param([string]$Text)
    Write-Host ''
    Write-Host ('-' * 70) -ForegroundColor DarkGray
    if ($Text) { Write-Host $Text -ForegroundColor Cyan }
}

function Probe { param([string]$Label, [string]$Fix, [scriptblock]$Command)
    Write-Rule ("  " + $Label)
    Write-Host ("  from: " + $Fix) -ForegroundColor DarkGray
    Write-Host ''
    foreach ($l in ($Command.ToString().Trim() -split "`n")) {
        Write-Host ("    " + $l.Trim()) -ForegroundColor DarkGreen
    }
    Write-Host ''
    try {
        $out = & $Command 2>&1 | Out-String
        if ([string]::IsNullOrWhiteSpace($out)) {
            Write-Host '    (returned nothing)' -ForegroundColor DarkGray
        } else {
            foreach ($l in ($out.TrimEnd() -split "`n")) { Write-Host ("    " + $l.TrimEnd()) }
        }
    } catch {
        Write-Host ("    could not run: " + $_.Exception.Message) -ForegroundColor Yellow
    }
}

Write-Rule
Write-Host '  Printing from Office fails, prints blank, or goes to the wrong printer' -ForegroundColor White
Write-Host '  Read-only diagnostic -- nothing is changed.' -ForegroundColor Green
Write-Rule

Probe -Label 'See what Windows currently thinks the default is.' -Fix 'Pin the default printer and stop Windows moving it' -Command {
    Get-CimInstance Win32_Printer | Where-Object Default -eq $true | Select-Object Name, PortName, WorkOffline
}

Probe -Label 'Check whether Windows is managing the default itself.' -Fix 'Pin the default printer and stop Windows moving it' -Command {
    Get-ItemProperty 'HKCU:\Software\Microsoft\Windows NT\CurrentVersion\Windows' -Name LegacyDefaultPrinterMode -ErrorAction SilentlyContinue
}

Probe -Label 'Check no printer is stuck in the offline state, which makes Office behave as though it does not exist.' -Fix 'Pin the default printer and stop Windows moving it' -Command {
    Get-Printer | Select-Object Name, PrinterStatus, @{n='Offline';e={(Get-CimInstance Win32_Printer -Filter "Name='$($_.Name)'").WorkOffline}}
}

Probe -Label 'Look at what is queued before clearing it, so you know what will be lost.' -Fix 'Clear the print queue and restart the spooler' -Command {
    Get-Printer | ForEach-Object { Get-PrintJob -PrinterName $_.Name -ErrorAction SilentlyContinue } | Select-Object PrinterName, Id, DocumentName, SubmittedTime, JobStatus
}

Probe -Label 'Verify: The spooler is running, the queue is empty, and a test page prints.' -Fix 'Clear the print queue and restart the spooler' -Command {
    Get-Service Spooler | Select-Object Status
}

Probe -Label 'List what driver the printer is using.' -Fix 'Isolate the driver' -Command {
    Get-Printer | Select-Object Name, DriverName, PortName
}

Write-Rule
Write-Host '  Diagnostic finished. Nothing was changed.' -ForegroundColor Green
Write-Host ''
Write-Host '  Compare the output above with the write-up, then run the'
Write-Host '  script for the fix that matches:'
Write-Host '    https://jbtecwiz.com/support/win-office-printing'
Write-Rule
if ($Transcript) { Stop-Transcript | Out-Null }