///////////////////////////////////////////////////////////////////////////////
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//

using System;
using Microsoft.SingSharp;
using Microsoft.Singularity.Channels;
using Microsoft.Singularity.Directory;

namespace Microsoft.Singularity.Directory {
    contract DirectoryServiceContract : ServiceContract {
        // Flag values (used in AckAttributes)
        public enum FileFlags
        {
            Normal    = 128,
            Directory = 16,
            Hidden    = 2,
            ReadOnly  = 1,
        }

        out     message Success();

        in      message Bind(char[]! in ExHeap path, ServiceContract.Exp:Start! exp); 
        out     message AckBind();
        out     message NakBind(ServiceContract.Exp:Start exp); // return unconnected endpoint

        in      message CreateDirectory(char []! in ExHeap dirName);
        out     message AckCreateDirectory();
        out     message NakCreateDirectory();

        in      message DeleteDirectory(char []! in ExHeap dirName);
        out     message AckDeleteDirectory();
        out     message NakDeleteDirectory();

        in      message CreateFile(char []! in ExHeap fileName);
        out     message AckCreateFile();
        out     message NakCreateFile();

        in      message DeleteFile(char []! in ExHeap fileName);
        out     message AckDeleteFile();
        out     message NakDeleteFile();

        in      message Attributes(char []! in ExHeap fileName);
        out     message AckAttributes(long size, uint flags, long linkFlags);
        out     message NakAttributes();
        
        in      message QueryACL(char []! in ExHeap fileName, 
                    byte[]! in ExHeap permission);
        out     message AckQueryACL(byte[]! in ExHeap acl);
        out     message NakQueryACL();

        in      message StoreACL(char []! in ExHeap fileName, 
                    byte[]! in ExHeap permission, 
                    byte[]! in ExHeap acl);
        out     message AckStoreACL();
        out     message NakStoreACL();
        
        in      message CreateLink(char []! in ExHeap linkPath, char []! in ExHeap linkValue );
        out     message AckCreateLink();
        out     message NakCreateLink();

        in      message DeleteLink(char []! in ExHeap linkPath);
        out     message AckDeleteLink();
        out     message NakDeleteLink();

        in      message Close();
        out     message AckClose();

        override state Start: one {
            Success! -> Ready;
        }

        state Ready: one {
            Bind? ->                ( AckBind! or NakBind!) -> Ready;

            CreateDirectory? ->     ( AckCreateDirectory! or NakCreateDirectory! ) -> Ready;
            DeleteDirectory? ->     ( AckDeleteDirectory! or NakDeleteDirectory! ) -> Ready;

            CreateFile? ->          (AckCreateFile! or NakCreateFile!) -> Ready;
            DeleteFile? ->          ( AckDeleteFile! or NakDeleteFile!) -> Ready;

            Attributes? ->      (AckAttributes! or NakAttributes!)   -> Ready;
            
            QueryACL? ->            (AckQueryACL! or NakQueryACL!) -> Ready;
            StoreACL? ->            (AckStoreACL! or NakStoreACL!) -> Ready;

            CreateLink? ->          ( AckCreateLink! or NakCreateLink! ) -> Ready;
            DeleteLink? ->          ( AckDeleteLink! or NakDeleteLink! ) -> Ready;

            Close? -> AckClose! ->  Ready;
        }
    }
}