Set PowerPlanHighPerformance

<#
.SYNOPSIS
    Enforces 'High Performance' power plan when connected to AC power.

.DESCRIPTION
    <!-- library-status:start -->
    Prüfstatus: Ungeprüft
    Windows- und Tenant-Abnahme ausstehend; keine pauschale Produktionsfreigabe.

    <!-- library-status:end -->

    Prevents devices from sleeping aggressively when plugged in.
    Useful for Kiosk devices or developer machines.

    Uses powercfg.exe.

.NOTES
    File Name  : 148_Set-PowerPlanHighPerformance.ps1
    Author     : Kaffeeundcode
    Version    : 1.0
#>

Write-Host "Checking Power Schemes..." -ForegroundColor Cyan

# Find High Perf GUID
$Plans = powercfg /list
$HighPerf = $Plans | Select-String "High performance"

if ($HighPerf) {
    if ($HighPerf -match "GUID: ([a-f0-9-]+)") {
        $Guid = $matches[1]
        Write-Host "Found High Performance: $Guid" -ForegroundColor Green

        # Set Active
        powercfg /setactive $Guid
        Write-Host "Set to Active."

        # Ensure AC settings prevent sleep (Timeout 0)
        powercfg /change monitor-timeout-ac 0
        powercfg /change standby-timeout-ac 0
        powercfg /change hibernate-timeout-ac 0

        Write-Host "Sleep timeouts disabled on AC." -ForegroundColor Green
    }
} else {
    Write-Warning "High Performance plan not found. It might be hidden on Modern Standby devices."
    # Attempt to use 'Ultimate Performance' or duplicate Balanced
}