///////////////////////////////////////////////////////////////////////////////
//
//  Microsoft Research Singularity
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
//  Note:   Simple ping-pong second child process
//

using Microsoft.SingSharp;
using Microsoft.SingSharp.Runtime;
using Microsoft.Singularity.Diagnostics.Contracts;
using Microsoft.Singularity.Channels;
using Microsoft.Singularity.Directory;
using Microsoft.Singularity.WebApps;
using Microsoft.Singularity.PingPong.Contracts;
using System;

namespace Microsoft.Singularity.Applications
{
    public class CPong
    {
        public static int Main()
        {
            Endpoint * in ExHeap ep = Process.GetStartupEndpoint(0);
            PongContract.Exp conn = ep as PongContract.Exp;
            if (conn == null) {
                delete ep;
                Console.WriteLine("CPong  : Missing PongContract endpoint.");
                return 2;
            }

            Console.WriteLine("CPong  : Ready...");
            conn.SendPongReady();

            try {
                while (true) {
                    switch receive {
                        case conn.Ping(int data):
                            Console.WriteLine("CPong  : Ping({0}) to Pong...", data);
                            conn.SendPong(data + 1);
                            break;

                        case conn.ChannelClosed():
                            return 0;
                    }
                }
            }
            finally {
                delete conn;
            }
            Console.WriteLine("CPong  : Exiting...");
            return 3;
        }
    }
}