[CmdletBinding(SupportsShouldProcess)]param(
    [Parameter(Mandatory,ValueFromPipeline)]
    [string[]]$Path,
    [switch]$sudo,
    [string]$User,
    [string]$Group,
    [string]$FilePermission,
    [string]$DirPermission,
    [switch]$Force,
    [switch]$NonRecursive
)

begin {
    if( -not $sudo -and -not (Test-IsAdmin) ) {
        throw "This command must be run in Admin context"
    }

    if( [string]::IsNullOrWhiteSpace($User) ) {
        $User =  $env:SZ_DOCKER_PUID ?? $env:USER;
    }
    $User =  "$(& id --user --name $User)";

    if( [string]::IsNullOrWhiteSpace($Group) ) {
        $Group =  $env:SZ_DOCKER_GUID ?? "$(& id --group --name $User)"
    }

    if(  [string]::IsNullOrWhiteSpace($FilePermission) ) {
        $FilePermission = $env:SZ_FILE_PERM ?? "664"
    }

    if(  [string]::IsNullOrWhiteSpace($DirPermission) ) {
        $DirPermission = $env:SZ_DIR_PERM ?? "664"
    }

    $cmdArgs = "-Recurse:`$$(-not $NonRecursive) -Force:`$$Force"
}

process {
    $Path | Get-Item | ForEach-Object {
        $local:p = $_.FullName
        $local:nextCmd = ""
        if( $_.Attributes -band [System.IO.FileAttributes]::Directory ) {
            $nextCmd = "Get-ChildItem $p $cmdArgs | ForEach-Object { & chown ${User}:${Group} `$_ }"
            if( $PSCmdlet.ShouldProcess( "Set $p ownership to ${User}:${Group}`n$nextCmd`n" ) ) {
                Invoke-ExpressionEx -sudo:$sudo $nextCmd
            }
        }

        $nextCmd = "Get-ChildItem $p -Directory $cmdArgs | ForEach-Object { & chmod $DirPermission `$_ }"
        if( $PSCmdlet.ShouldProcess( "Set $p dirs permissions to $DirPermission`n$nextCmd`n" ) ) {
            Invoke-ExpressionEx -sudo:$sudo $nextCmd
        }

        $nextCmd = "Get-ChildItem $p -File $cmdArgs | ForEach-Object { & chmod $FilePermission `$_ }"
        if( $PSCmdlet.ShouldProcess( "Set $p file permissions to $FilePermission`n$nextCmd`n" ) ) {
            Invoke-ExpressionEx -sudo:$sudo $nextCmd
        }
    }
}