///////////////////////////////////////////////////////////////////////////////
//
//  Microsoft Research Singularity
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
//  File:   Attr.sg
//
//  Note:
//

using FileSystem.Utils;
using System;
using System.Text;
using System.Threading;
using Microsoft.Singularity;
using Microsoft.Singularity.Directory;
using Microsoft.Singularity.Channels;
using Microsoft.Singularity.FileSystem;
using Microsoft.Singularity.V1.Services;

using Microsoft.Contracts;
using Microsoft.SingSharp.Reflection;
using Microsoft.Singularity.Applications;
using Microsoft.Singularity.Io;
using Microsoft.Singularity.Configuration;
[assembly: Transform(typeof(ApplicationResourceTransform))]

namespace Microsoft.Singularity.Applications
{
    [ConsoleCategory(HelpMessage="Show attributes associated with a file", DefaultAction=true)]
    internal class Parameters 
    {
        [InputEndpoint("data")]
        public readonly TRef<UnicodePipeContract.Exp:READY> Stdin;

        [OutputEndpoint("data")]
        public readonly TRef<UnicodePipeContract.Imp:READY> Stdout;

        [Endpoint]
        public readonly TRef<DirectoryServiceContract.Imp:Start> nsRef;

        [StringParameter( "filename", Mandatory=true, Position=0, HelpMessage="Name of file.")]
        internal string fileName;

        reflective internal Parameters();

        internal int AppMain() {
            return FsAttributes.AppMain(this);
        }
    }

    public class FsAttributes
    {
        internal static int AppMain(Parameters! config)
        {
            long size;
            NodeType nodeType; 

            DirectoryServiceContract.Imp rootNS = (config.nsRef).Acquire(); 
            if (rootNS == null) { 
                throw new Exception("Unable to acquire handle to the Directory Service root"); 
            } 
            
            rootNS.RecvSuccess();

            ErrorCode error; 
            bool ok  = FileUtils.GetAttributes(config.fileName, rootNS, out size, out nodeType, out  error);
            delete rootNS; 

            if (ok) {
                Console.WriteLine("GetAttributes for " + config.fileName);
                Console.WriteLine("  Size: " + size);
                Console.WriteLine("  NodeType: {0}", SdsUtils.NodeTypeToString(nodeType) );
                return 0; 
            }
            else {
                Console.WriteLine(" Attr for ({0}) failed. reason:{1}",
                    config.fileName, SdsUtils.ErrorCodeToString(error) ); 
            }
            return -1;
        }

        private static void Usage()
        {
            Console.WriteLine("type <filename>  displays output of file on console.");
        }
    } // class Test
}