##################################################################################
#
#
#  Script name: Get-Inventory.ps1
#  Author:      goude@powershell.nu
#  Homepage:    www.powershell.nu
#
#
##################################################################################

param ([string]$Client, [switch]$help)

function GetHelp() {


$HelpText = @"

DESCRIPTION:
NAME: Get-Inventory.ps1
Gets Information About Clients through WMI

PARAMETERS: 
-Client      Name of the Client (Required)
-help        Prints the HelpFile (Optional)

SYNTAX:
./Get-Inventory.ps1 -Client Client1

Gets Information about the client and
returns it to the Prompt

Get-Inventory.ps1 -help

Displays the help topic for the script

"@
$HelpText

}


function Get-ChassisType ($Type) {

# Function that calculates ChassisType
# based on Win32_SystemEnclosure
# thanks, Scripting Guy
# http://www.microsoft.com/technet/scriptcenter/resources/qanda/sept04/hey0921.mspx

Switch($Type) {

	{ $_ -eq 1 } { "Maybe Virtual Machine” }
	{ $_ -eq 2 } { "??” }
	{ $_ -eq 3 } { "Desktop” }
	{ $_ -eq 4 } { "Thin Desktop” }
	{ $_ -eq 5 } { "Pizza Box” }
	{ $_ -eq 6 } { "Mini Tower” }
	{ $_ -eq 7 } { "Full Tower” }
	{ $_ -eq 8 } { "Portable” }
	{ $_ -eq 9 } { "Laptop” }
	{ $_ -eq 10 } { "Notebook” }
	{ $_ -eq 11 } { "Hand Held” }
	{ $_ -eq 12 } { "Docking Station” }
	{ $_ -eq 13 } { "All in One” }
	{ $_ -eq 14 } { "Sub Notebook” }
	{ $_ -eq 15 } { "Space-Saving” }
	{ $_ -eq 16 } { "Lunch Box” }
	{ $_ -eq 17 } { "Main System Chassis” }
	{ $_ -eq 18 } { "Lunch Box” }
	{ $_ -eq 19 } { "SubChassis” }
	{ $_ -eq 20 } { "Bus Expansion Chassis” }
	{ $_ -eq 21 } { "Peripheral Chassis” }
	{ $_ -eq 22 } { "Storage Chassis" }
	{ $_ -eq 23 } { "Rack Mount Unit” }
	{ $_ -eq 24 } { "Sealed-Case PC” }
	Default { ”Unknown” }
	}
}

function Get-ClientInformation ([string]$ComputerName) {

	Write-Host "Gathering Client Information From: $ComputerName"

	# WMI Used in Script

	$WmiObject = "ComputerSystem",
	"OperatingSystem",
	"NetworkAdapterConfiguration", 
	"SystemEnclosure",
	"LogicalDisk",
	"Processor",
	"DisplayConfiguration"

	# Gathering Information ForEach WMI object
	# And Storing in Variable $WmiObject

	$WmiObject | 
		% { Set-Variable -name $_ -value (gwmi Win32_$_ -ComputerName $ComputerName) }

	# Get Network Information

	$NetworkAdapter = $NetworkAdapterConfiguration | 
		where {$_.Index -match $Network.DeviceID -and $_.IPEnabled -eq $true } | 
			select -first 1
	$IPAddress = ($NetworkAdapter.IpAddress | select -first  1).ToString()
	$IPSubNet = ($NetworkAdapter.IPSubnet | select -first  1).ToString()
	$MACAddress = $NetworkAdapter.MACAddress

	# Get ChassisType

	$ChassisValue = $SystemEnclosure.ChassisTypes
	$ChassisType = Get-ChassisType $ChassisValue

	# Get OperatingSystem and Language

	$OS = ($OperatingSystem.Caption).ToString()
	$OSLanguage = ($OperatingSystem.OSLanguage).ToString()

	# Get RAM

	[int]$RAM = ($OperatingSystem.TotalVisibleMemorySize / 1024)
	$RAMMemory = [string]$RAM + " MB"

	# Get HD Size

	$HDD = $LogicalDisk | 
		Where { $_.DeviceID -match "C:" }

	[int]$HDDTot = ($HDD.Size /1024 /1024)
	[int]$HDDFree = ($HDD.FreeSpace /1024 /1024)

	$HDTotal = [string]$HDDTot + " MB"
	$HDFreeSpace = [string]$HDDFree + " MB"


	# Create Object to hold information

	$ClientObject = New-Object PsObject

	$ClientObject | Add-Member -memberType NoteProperty "UserName" -Value $ComputerSystem.UserName
	$ClientObject | Add-Member -memberType NoteProperty "ComputerName" -Value $ComputerSystem.Name
	$ClientObject | Add-Member -memberType NoteProperty "ScreenModel" -Value $DisplayConfiguration.DeviceName
	$ClientObject | Add-Member -memberType NoteProperty "ChassisType" -Value $ChassisType
	$ClientObject | Add-Member -memberType NoteProperty "ComputerManufacturer" -Value $ComputerSystem.Manufacturer
	$ClientObject | Add-Member -memberType NoteProperty "ComputerModel" -Value $ComputerSystem.Model
	$ClientObject | Add-Member -memberType NoteProperty "SerialNumber" -Value $OperatingSystem.SerialNumber
	$ClientObject | Add-Member -memberType NoteProperty "RAM" -Value $RAMMemory
	$ClientObject | Add-Member -memberType NoteProperty "CPU" -Value $Processor.Name
	$ClientObject | Add-Member -memberType NoteProperty "HDDTotal" -Value $HDTotal
	$ClientObject | Add-Member -memberType NoteProperty "HDDFreeSpace" -Value $HDFreeSpace
	$ClientObject | Add-Member -memberType NoteProperty "OperatingSystem" -Value $OS
	$ClientObject | Add-Member -memberType NoteProperty "Language" -Value $OSLanguage
	$ClientObject | Add-Member -memberType NoteProperty "Domain" -Value $ComputerSystem.Domain
	$ClientObject | Add-Member -memberType NoteProperty "IPAdress" -Value $IPAddress
	$ClientObject | Add-Member -memberType NoteProperty "SubNet" -Value $IPSubNet
	$ClientObject | Add-Member -memberType NoteProperty "MACAddress" -Value $MACAddress

	# Return Information
	
	return $ClientObject
}

if ($help) { GetHelp }

if ($Client) { Get-ClientInformation $Client }