///////////////////////////////////////////////////////////////////////////////
//
//  Microsoft Research Singularity
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
//  File:   RemoteHttpRequest.sg
//
//  Note:
//    This file wraps a HttpRequestContract so it can be accessed like a
//    regular object.
//

using System;
using Microsoft.SingSharp;
using Microsoft.SingSharp.Runtime;
using Microsoft.Singularity.Channels;
using Microsoft.Singularity.WebApps.Contracts;

namespace Microsoft.Singularity.WebApps
{
    public class RemoteHttpRequest : IHttpRequest
    {
        private TRef<HttpRequestContract.Imp:Start> m_Conn;

        public RemoteHttpRequest([Claims] HttpRequestContract.Imp:Start! conn)
        {
            m_Conn = new TRef<HttpRequestContract.Imp:Start>(conn);
        }

        public string! GetUriPath()
        {
            HttpRequestContract.Imp conn = m_Conn.Acquire();

            try
            {
                char[]! in ExHeap uriChars;
                conn.SendGetUriPath();
                conn.RecvUriPath(out uriChars);
                string retval = Bitter.ToString2(uriChars);
                delete uriChars;
                return retval;
            }
            finally
            {
                m_Conn.Release(conn);
            }
        }

        public string GetQueryString()
        {
            HttpRequestContract.Imp conn = m_Conn.Acquire();

            try
            {
                char[] in ExHeap queryChars;
                conn.SendGetQueryString();
                conn.RecvQueryString(out queryChars);

                if (queryChars != null)
                {
                    string retval = Bitter.ToString(queryChars);
                    delete queryChars;
                    return retval;
                }
                else
                {
                    return null;
                }
            }
            finally
            {
                m_Conn.Release(conn);
            }
        }

        public string GetVerb()
        {
            HttpRequestContract.Imp conn = m_Conn.Acquire();

            try
            {
                char[]! in ExHeap verbChars;
                conn.SendGetVerb();
                conn.RecvVerb(out verbChars);
                string retval = Bitter.ToString(verbChars);
                delete verbChars;
                return retval;
            }
            finally
            {
                m_Conn.Release(conn);
            }
        }

        public string GetHeader(string! headerName)
        {
            HttpRequestContract.Imp conn = m_Conn.Acquire();

            try
            {
                char[] in ExHeap headerChars;
                conn.SendGetHeader(Bitter.FromString2(headerName));
                conn.RecvHeaderValue(out headerChars);

                if (headerChars != null) {
                    string retval = Bitter.ToString(headerChars);
                    delete headerChars;
                    return retval;
                } else {
                    return null;
                }
            }
            finally
            {
                m_Conn.Release(conn);
            }
        }

        public byte[] GetBodyData()
        {
            HttpRequestContract.Imp conn = m_Conn.Acquire();

            try
            {
                byte[] in ExHeap bodyBytes;
                conn.SendGetBody();
                conn.RecvBodyData(out bodyBytes);

                if (bodyBytes != null) {
                    byte[] retval = Bitter.ToByteArray(bodyBytes);
                    delete bodyBytes;
                    return retval;
                } else {
                    return null;
                }
            }
            finally
            {
                m_Conn.Release(conn);
            }
        }

        public string! GetRemoteAddress()
        {
            HttpRequestContract.Imp conn = m_Conn.Acquire();

            try
            {
                char[]! in ExHeap addrChars;
                conn.SendGetRemoteAddress();
                conn.RecvRemoteAddress(out addrChars);
                string! retval = Bitter.ToString2(addrChars);
                delete addrChars;
                return retval;
            }
            finally
            {
                m_Conn.Release(conn);
            }
        }

        public void SendStatus(int code, string! description)
        {
            HttpRequestContract.Imp conn = m_Conn.Acquire();

            try
            {
                char[]! in ExHeap descChars = Bitter.FromString2(description);
                conn.SendSendStatus(code, descChars);
                conn.RecvOK();
            }
            finally
            {
                m_Conn.Release(conn);
            }
        }

        public void SendHeader(string! name, string! value)
        {
            HttpRequestContract.Imp conn = m_Conn.Acquire();

            try
            {
                char[]! in ExHeap nameChars = Bitter.FromString2(name);
                char[]! in ExHeap valChars = Bitter.FromString2(value);
                conn.SendSendHeader(nameChars, valChars);
                conn.RecvOK();
            }
            finally
            {
                m_Conn.Release(conn);
            }
        }

        public void SendBodyData(byte[]! data)
        {
            SendBodyData(Bitter.FromByteArray(data));
        }

        public void SendBodyData([Claims]byte[]! in ExHeap data)
        {
            HttpRequestContract.Imp conn = m_Conn.Acquire();

            try
            {
                conn.SendSendBodyData(data);
                conn.RecvOK();
            }
            finally
            {
                m_Conn.Release(conn);
            }
        }

        public void Done()
        {
            HttpRequestContract.Imp conn = m_Conn.Acquire();

            conn.SendDone();
            delete conn;
        }
    }
}