$outlook = New-Object -ComObject Outlook.Application
$namespace = $outlook.GetNamespace("MAPI")

# Target mailbox
$mailboxName = "svc_huloop@qnbtrust.bank"
$mailbox = $null

for ($i = 1; $i -le $namespace.Folders.Count; $i++) {
    if ($namespace.Folders.Item($i).Name -eq $mailboxName) {
        $mailbox = $namespace.Folders.Item($i)
        break
    }
}

if (-not $mailbox) {
    Write-Output "MAILBOX_NOT_FOUND"
    exit
}

# Inbox + restrict to unread
$inbox = $mailbox.Folders.Item("Inbox")
$items = $inbox.Items
$items.Sort("[ReceivedTime]", $false)
$unreadItems = $items.Restrict("[UnRead] = true")

# Settings
$subjectMatch = "Admin Platform"
$codeRegex = [regex]"Access Code is[:\s]+(\d{5,6})"
$cutoff = (Get-Date).AddMinutes(-10)

# Scan unread items within time window
foreach ($item in $unreadItems) {
    if ($item -ne $null -and $item.Class -eq 43) {
        $received = $item.ReceivedTime
        if ($received -lt $cutoff) {
            continue
        }

        if ($item.Subject -like "*$subjectMatch*") {
            $body = $item.Body
            if ($body) {
                $match = $codeRegex.Match($body)
                if ($match.Success) {
                    Write-Output $match.Groups[1].Value
                    exit
                }
            }
        }
    }
}

Write-Output "CODE_NOT_FOUND"