# Detect-TimeZone-CET-24H.ps1
# Exit 0 = compliant, Exit 1 = not compliant

# 1) Timezone compliance: CET/CEST offset (works for SE/NO/DK/RS)
$tzOk = $false
try {
    $offset = [TimeZoneInfo]::Local.GetUtcOffset((Get-Date)).TotalHours
    # CET/CEST is +1 winter, +2 summer
    if ($offset -in 1, 2) { $tzOk = $true }
} catch {
    $tzOk = $false
}

# 2) 24-hour clock defaults (.DEFAULT hive)
$intlPath = "Registry::HKEY_USERS\.DEFAULT\Control Panel\International"
$timeOk = $false
try {
    $p = Get-ItemProperty -Path $intlPath -ErrorAction Stop
    $short = [string]$p.sShortTime
    $iTime = [string]$p.iTime
    if ($short -eq "HH:mm" -and $iTime -eq "1") { $timeOk = $true }
} catch {
    $timeOk = $false
}

Write-Output "TZ offset hours: $offset (OK=$tzOk)"
Write-Output "HKU\.DEFAULT sShortTime: $short, iTime: $iTime (OK=$timeOk)"

if ($tzOk -and $timeOk) { exit 0 } else { exit 1 }