# ----------------------------------------------------------------------------------------------------------------------------------------------------------

function ParameterDefinitions {
    param(
        [Parameter(Mandatory)][string] $filename,
        [Parameter(ValueFromRemainingArguments)] $opts
    )
}
#  see also https://vcsjones.dev/subject-interface-packages/
# ----------------------------------------------------------------------------------------------------------------------------------------------------------
function psmain {
    [CmdletBinding()]
    #Empty param block (extra params can be added)
    param()
    dynamicparam { GetDynamicParamDictionary ParameterDefinitions }
    process {
        #Called once - we get a single item being our PSBoundParameters dictionary
        write-host "Bound Parameters:$($PSBoundParameters)"
        switch ($PSBoundParameters.keys) {
            'filename' {
                write-host "got filename " $PSBoundParameters.filename
                Set-Variable -Name $_ -Value $PSBoundParameters."$_"
                if (($filename.length -eq 0) -or -not (test-path $filename)) {
                    write-host "file $filename not found"
                    exit 1
                }                
            }
            'opts' {
                write-warning "Unused parameters: $($PSBoundParameters.$_)" 
            }
            Default {
                write-warning "Unhandled parameter -> [$($_)]"
            }
        }
        foreach ($boundparam in $PSBoundParameters.GetEnumerator()) {
            
        }
    }
    end {
        # PSBoundParameters 
        write-host "filename:'$filename'"
       
        $cert = Get-ChildItem -path Cert:\LocalMachine\My -CodeSigningCert | Where-Object {$_.subject -eq "CN=punkshell local"} | Select-Object -First 1
        if ($cert.length -eq 0) {
            write-host "No self signing certificate found (Cert:\LocalMachine\My)"
            exit 2
        }
        write-host "Using Certificate"
        write-host $cert | Select-Object FriendlyName,Thumbprint,Subject,NotAfter
        write-host "Processing '$filename' ..."
        try {
            Write-Host $(Set-AuthenticodeSignature -FilePath $filename -Certificate $cert)
        } catch {
            throw $_.Exception.Message
        }

        write-host "-done-"
        return $PSBoundParameters
    }
}
write-host (psmain @args)