<#

	.PARAMETER Build_Number
		BuildNumber from the current OS
		
	.PARAMETER log_File
		Output logged to that filename
	
	.PARAMETER LineBreak
		Breaks long lines in output
		
	.EXAMPLE
		Format:
	
		"19045" = "Windows 10 Version 22H2 (OS build 19045)"
		"22000" = "Windows 11 Version 21H2 (OS build 22000)"
		
	.LINK
		https://learn.microsoft.com/en-us/windows/release-health/release-information
		https://learn.microsoft.com/en-us/windows/release-health/windows11-release-information

#>

# BuildNumber
$Build_Number = (Get-WmiObject Win32_OperatingSystem).BuildNumber

# Log all information into that file
$log_File = "C:\Temp\Get-Windows_DisplayVersion"

# Carriage Return
$Line_Break = "`r`n"

# valid Windows OS Releases
$valid_BuildNumbers = @{

	"9200" = "Windows 8" +$Line_Break+ "and Windows Server 2012 (OS build 9200)"
	"9600" = "Windows 8.1" +$Line_Break+ "and Windows Server 2012 R2 (OS build 9600)"
	"10240" = "Windows 10 Version 1507 (RTM) (OS build 10240)"
	"10586" = "Windows 10 Version 1511 (OS build 10586) - End of servicing"
	"14393" = "Windows 10 Version 1607" +$Line_Break+ "and Windows Server 2016 (OS build 14393) - End of servicing"
	"15063" = "Windows 10 Version 1703 (OS build 15063) - End of servicing"
	"16299" = "Windows 10 Version 1709 (OS build 16299) - End of servicing"	
	"17134" = "Windows 10 Version 1803 (OS build 17134) - End of servicing"
	"17763" = "Windows 10 Version 1809" +$Line_Break+ "and Windows Server 2019 (OS build 17763)"
	"18362" = "Windows 10 Version 1903 (OS build 18362) - End of servicing"
	"18363" = "Windows 10 Version 1909 (OS build 18363) - End of servicing"
	"19041" = "Windows 10 Version 2004 (OS build 19041) - End of servicing"
	"19042" = "Windows 10 Version 20H2 (OS build 19042) - End of servicing"
	"19043" = "Windows 10 Version 21H1 (OS build 19043) - End of servicing"
	"19044" = "Windows 10 Version 21H2 (OS build 19044)"
	"19045" = "Windows 10 Version 22H2 (OS build 19045)"
	"22000" = "Windows 11 Version 21H1 (OS build 22000)"
	"22621" = "Windows 11 Version 22H2 (OS build 22621)"
	"22631" = "Windows 11 Version 23H2 (OS build 22631)"
	"20348" = "Windows Server 2022, Datacenter, Standard (OS build 20348)"

}

# Function to generate Message in Log
function log_Output {

	Param (
		
		$output
	
	)

	# Current date
	$date = (Get-Date -format "yyyy-MM-dd_HH-mm-ss")
	$ldate = (Get-Date -format "yyyy-MM-dd_HH-mm")

	# Skript Log
	$log_File = "{0}-{1}.log" -f $log_File, $ldate
	
    # Format a log message
	$message = "{0}: {1}" -f $date, $($output)
	$message = $message | Out-File $log_File -Append
			
}

# Only execute if BuildNumber is valid
if ($Build_Number) {
	
	# Iterate through list
    foreach ($BuildNumber_Key in $valid_BuildNumbers.Keys) {
		
		# Compare key with list of releases
	    if ($BuildNumber_Key -eq $Build_Number) {
				
			# Build a message string
            $message = "{0}" -f $valid_BuildNumbers[$BuildNumber_Key]

			# Log message to Stdout
			Write-Output $message

			# Log message to a protocol
			log_Output $message

 			exit 0

        }

    }

    # Build a message string
    $message = "No valid Windows Version detected"
 	
	# Log message to Stdout
	Write-Output $message

	# Log message to a protocol
	log_Output $message
	
}
    
exit 0