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

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

namespace Microsoft.Singularity.Services.Fat.Contracts
{
    public contract FatClientContract
    {
        in message Mount(FatMountSettings*! in ExHeap fms);
        out message Success();
        out message Fail(FatContractErrorCode why);

        in message Unmount(bool force);

        in message GetPreferredFormatSettings(
            char []! in ExHeap diskName
            );

        out message PreferredFormatSettings(
            FatFormatSettings*! in ExHeap fms
            );

        in message Format(
            char []! in ExHeap diskName,
            char []! in ExHeap volumeLabel,
            FatFormatSettings*! in ExHeap fms
            );

        state Start : one {
            Mount? -> MountPending;
            GetPreferredFormatSettings? -> (Fail! or PreferredFormatSettings!) -> Start;
            Format? -> (Fail! or Success!) -> Start;
        }

        state MountPending : one {
            Success! -> Running;
            Fail! -> Done;
        }

        state Running : one {
            Unmount ? -> UnmountPending;
        }

        state UnmountPending : one {
            Fail! -> Running;
            Success! -> Done;
        }

        state Done : one {
        }
    }
}