[CmdletBinding(SupportsShouldProcess = $true)]
param(
    [switch]$AllUsers,
    [string]$ServiceName = "ScreenJobBackend"
)

Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

$scriptDir = Split-Path -Parent $PSCommandPath
$shortcutName = "ScreenJob Backend.lnk"
$startupFolder = if ($AllUsers) {
    [Environment]::GetFolderPath("CommonStartup")
} else {
    [Environment]::GetFolderPath("Startup")
}

$shortcutPath = Join-Path $startupFolder $shortcutName

$service = Get-Service -Name $ServiceName -ErrorAction SilentlyContinue
if ($null -ne $service) {
    if ($PSCmdlet.ShouldProcess($ServiceName, "Remove legacy Windows service")) {
        if ($service.Status -ne "Stopped") {
            Stop-Service -Name $ServiceName -Force -ErrorAction Stop
        }

        & sc.exe delete $ServiceName | Out-Null
        if ($LASTEXITCODE -ne 0) {
            throw "Failed to delete service '$ServiceName' (sc.exe exit code $LASTEXITCODE)."
        }

        Write-Host "Removed legacy Windows service: $ServiceName"
    }
}

if (Test-Path -LiteralPath $shortcutPath) {
    if ($PSCmdlet.ShouldProcess($shortcutPath, "Remove backend startup shortcut")) {
        Remove-Item -LiteralPath $shortcutPath -Force
        Write-Host "Removed backend startup shortcut: $shortcutPath"
    }
} else {
    Write-Host "No backend startup shortcut found at: $shortcutPath"
}

Write-Host "Backend launcher uninstalled successfully." -ForegroundColor Green