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[CmdletBinding(SupportsShouldProcess=$True,DefaultParameterSetName="None")]
PARAM()

function Get-PolicyStatus {
	[CmdletBinding(SupportsShouldProcess=$True,DefaultParameterSetName="None")]
	PARAM(
		[Alias("Guid")]
		[Parameter(Mandatory = $true, Position = 0, ValueFromPipeline = $true, ParameterSetName="p1")]
		[guid]
		$PolicyGuid
	)
	
	try {
		Write-Verbose "Policy Guid: $($PolicyGuid.ToString('B').ToUpper())"

		# Get the current execution user context
		$CurrentUser = [System.Security.Principal.WindowsIdentity]::GetCurrent().Name
		Write-Verbose "Running as: $($CurrentUser)"
		
		# Connect to the local base agent
		$IAeXClient = New-Object -ComObject Altiris.AeXClient -ErrorAction Stop
		# Get the Web service for the default server
		$DefaultWebSerivceUri = $IAeXClient.ServerWeb
		Write-Verbose "Default Web Service URI: $($DefaultWebSerivceUri)"
		
 		if ($PolicyGuid -eq '{00000000-0000-0000-0000-000000000000}') {
			$PolicyEnabled = $false
		} else {
			$Stopwatch = [Diagnostics.Stopwatch]::StartNew()
			$ItemManagementService = "$($DefaultWebSerivceUri)/ASDK.NS/ItemManagementService.asmx"
			$ItemManagementServiceProxy = New-WebServiceProxy -Uri $ItemManagementService Namespace WebServiceProxy -UseDefaultCredential
			$ItemManagementServiceProxy.EnableDecompression = $true
			Write-Verbose "Connected to: $($ItemManagementServiceProxy.Url)"
			$ItemDetails = $ItemManagementServiceProxy.GetItemByGuid($PolicyGuid)
			Write-Verbose "ItemManagementService call: $($Stopwatch.Elapsed)"
			$PolicyEnabled = $ItemDetails.Enabled
			Write-Verbose "Policy Name: $($ItemDetails.Name)"
		}
		Write-Verbose "Policy Enabled: $($PolicyEnabled)"
		$PolicyEnabled
	} catch {
		$false
	} finally {
		if ($Stopwatch) {
			$Stopwatch.Stop()
			$Stopwatch = $null
		}
	}
}

function Get-RunningPolicyGuid {
	[CmdletBinding(SupportsShouldProcess=$True,DefaultParameterSetName="None")]
	PARAM()

	$parentPolicyGuid = "{00000000-0000-0000-0000-000000000000}"
	try {
		# Connect to the local base agent
		$IAeXClient = New-Object -ComObject Altiris.AeXClient -ErrorAction Stop
		# Connect to the local software delivery agent
		$IAeXSWDAgent = $IAeXClient.Agent("Altiris.SWD")
		# Get the advertisementId Guid of the currently running policy
		$advertisementId = ([Guid]$IAeXSWDAgent.RunningProgram.Id).ToString('B').ToUpper()
		Write-Verbose "advertisementId: $($advertisementId)"
		if ($advertisementId) {
			# Get Software Delivery directories (they can span multiple drives
			$SWDInstallDirs = $IAeXSWDAgent.Packages | ? {$_.CacheFolder} | Select -ExpandProperty CacheFolder | Select @{Name="SWDInstallDir";Expression={$_.Substring(0,$_.indexof('{'))}} -Unique | Select -ExpandProperty SWDInstallDir
			foreach ($SWDInstallDir In $SWDInstallDirs) {
				$AeXSWDPolicyXmlPath = "$($SWDInstallDir)AeXSWDPolicy.xml"
				Write-Verbose "Testing: $($AeXSWDPolicyXmlPath)"
				# Test that the path exists
				if (Test-Path -Path $AeXSWDPolicyXmlPath -PathType Leaf) {
					Write-Verbose "Getting contents"
					# Get the contents of the XML file as XML
					$AeXSWDPolicyXml = [xml](Get-Content -Path $AeXSWDPolicyXmlPath)
					# Locate the policy guid for the advertisement
					$parentPolicyGuid = $AeXSWDPolicyXml.SWD.Advertisements.Advertisement | ? {$_.Id -eq $advertisementId} | Select -ExpandProperty "parentPolicyGuid"
					if ($parentPolicyGuid) {
						Write-Verbose "Policy Guid found. ($($parentPolicyGuid))"
						break
					}
				}
			}
		}
		$parentPolicyGuid
	} catch {
		$parentPolicyGuid
	} finally {
		if ($IAeXClient) {
			# Destroy the COM Object if it exists
	        [System.Runtime.InteropServices.Marshal]::ReleaseComObject($IAeXClient) | Out-Null
		}
	}
}

function Set-ExitCodeAndExit { 
	[CmdletBinding(SupportsShouldProcess=$True,DefaultParameterSetName="None")]
	PARAM(
        [Parameter(Mandatory = $true, Position = 0, ValueFromPipeline = $true, ParameterSetName="p1")]
        [int]
		$ExitCode
	)
	Write-Verbose "Setting ExitCode to $($ExitCode) and exiting..."
    $host.SetShouldExit($ExitCode)
    exit $ExitCode
}

$RunningPolicyGuid = Get-RunningPolicyGuid -Verbose:$VerbosePreference
$TranscriptFilePath = "$($env:WINDIR)\System32\LogFiles\MSDPolicyEnabled-$((Get-Date -format MMM).ToUpper()).log"

try {
	if ($RunningPolicyGuid) {
		try {
			Start-Transcript -Path $TranscriptFilePath -Force -Verbose -Append
			$PolicyEnabled = Get-PolicyStatus -PolicyGuid $RunningPolicyGuid -Verbose:$VerbosePreference

			if ($PolicyEnabled) {
				$Process = Start-Process -FilePath "$(Split-Path $Script:MyInvocation.MyCommand.Path)\MSDPolicyEnabled.cmd" -Wait -NoNewWindow -PassThru
				Set-ExitCodeAndExit -ExitCode $Process.ExitCode -Verbose:$VerbosePreference
			} else {
				Set-ExitCodeAndExit -ExitCode 1001 -Verbose:$VerbosePreference
			}
		} catch {
		} finally {
			try {
				Stop-Transcript
			} catch {}
		}
	} else {
		Set-ExitCodeAndExit -ExitCode 1001 -Verbose:$VerbosePreference
	}
} catch {
} finally {
#	Write-Host "Press any key to continue ..."
#	$x = $host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
}