#requires -version 2.0
[CmdletBinding()]
param (
    [parameter(Mandatory=$true)]
    [ValidatePattern('^https?://')]
    [string]
    $Uri,

    [parameter(
    ParameterSetName='ReportService2010',
    Mandatory=$true)] 
    [string]
    $Version,
    
    [System.Management.Automation.PSCredential]
    $Credential
)
 
$script:ErrorActionPreference = 'Stop'
Set-StrictMode -Version Latest
 
if (-not $Uri.EndsWith('.asmx')) {
    if (-not $Uri.EndsWith('/')) {
        $Uri += '/'
    }
	if($Version -eq 'ReportService2010'){
    	$Uri += 'ReportService2010.asmx?WSDL'
	} else {
    	$Uri += 'ReportService2005.asmx'	
	}
}
 
$Assembly = [AppDomain]::CurrentDomain.GetAssemblies() |
    Where-Object {
		if($Version -eq 'ReportService2010'){
        	$_.GetType('SSRS.ReportingService2010.ReportingService2010')
		} else {
	    	$_.GetType('SSRS.ReportingService2010.ReportingService2005')
		}			
    }
if (($Assembly | Measure-Object).Count -gt 1) {
    throw 'AppDomain contains multiple definitions of the same type. Restart PowerShell host.'
}
 
if (-not $Assembly) {
 
    if ($Credential) {
        $CredParams = @{ Credential = $Credential }
    } else {
        $CredParams = @{ UseDefaultCredential = $true }
    }                
	if($Version -eq 'ReportService2010'){
    	$Proxy = New-WebServiceProxy -Uri $Uri -Namespace SSRS.ReportingService2010 @CredParams
	} else {
    	$Proxy = New-WebServiceProxy -Uri $Uri -Namespace SSRS.ReportingService2005 @CredParams
	}	
 
} else {
    
	if($Version -eq 'ReportService2010'){
    	$Proxy = New-Object -TypeName SSRS.ReportingService2010.ReportingService2010
	} else {
    	$Proxy = New-Object -TypeName SSRS.ReportingService2005.ReportingService2005
	}		
    if ($Credential) {
        $Proxy.Credentials = $Credential.GetNetworkCredential()
    } else {
        $Proxy.UseDefaultCredentials = $true
    }
 
}
 
$Proxy.Url = $Uri
return $Proxy