/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.0 (the "NPL"); you may not use this file except in
 * compliance with the NPL.  You may obtain a copy of the NPL at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the NPL is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
 * for the specific language governing rights and limitations under the
 * NPL.
 *
 * The Initial Developer of this code under the NPL is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
 * Reserved.
 */

#include "nsNetService.h"
#include "nsNetStream.h"
#include "net.h"
#include "mktrace.h"
#include "plstr.h"

#include "nsString.h"
#include "nsIProtocolConnection.h"
#include "nsINetContainerApplication.h"

/* XXX: Legacy definitions... */
MWContext *new_stub_context();
void free_stub_context(MWContext *window_id);
static void bam_exit_routine(URL_Struct *URL_s, int status, MWContext *window_id);

extern "C" {
#include "fileurl.h"
#include "httpurl.h"
#include "ftpurl.h"
#include "abouturl.h"
#include "gophurl.h"
#include "fileurl.h"
#include "remoturl.h"
#include "netcache.h"

#if defined(XP_WIN) || defined(XP_OS2)
extern char *XP_AppCodeName;
extern char *XP_AppVersion;
extern char *XP_AppName;
extern char *XP_AppLanguage;
extern char *XP_AppPlatform;
#else
extern const char *XP_AppCodeName;
extern const char *XP_AppVersion;
extern const char *XP_AppName;
extern const char *XP_AppLanguage;
extern const char *XP_AppPlatform;
#endif
};

/*
 * Initialize our protocols
 */

extern "C" void NET_ClientProtocolInitialize()
{
    NET_InitFileProtocol();
    NET_InitHTTPProtocol();
    NET_InitMemCacProtocol();
    NET_InitFTPProtocol();
    NET_InitAboutProtocol();
    NET_InitGopherProtocol();
    NET_InitRemoteProtocol();
}

static NS_DEFINE_IID(kIProtocolConnectionIID,  NS_IPROTOCOLCONNECTION_IID);
static NS_DEFINE_IID(kINetContainerApplicationIID,  NS_INETCONTAINERAPPLICATION_IID);

nsNetlibService::nsNetlibService(nsINetContainerApplication *aContainerApp)
{
    NS_INIT_REFCNT();

    m_stubContext = new_stub_context();

    /* Initialize netlib with 32 sockets... */
    NET_InitNetLib(0, 32);

    /* Initialize the file extension -> content-type mappings */
    NET_InitFileFormatTypes(nsnull, nsnull);

    mContainer = aContainerApp;
    NS_IF_ADDREF(mContainer);
    if (NULL != mContainer) {
        nsAutoString str;
        
        mContainer->GetAppCodeName(str);
        XP_AppCodeName = str.ToNewCString();
        mContainer->GetAppVersion(str);
        XP_AppVersion = str.ToNewCString();
        mContainer->GetAppName(str);
        XP_AppName = str.ToNewCString();
        mContainer->GetPlatform(str);
        XP_AppPlatform = str.ToNewCString();
        mContainer->GetLanguage(str);
        XP_AppLanguage = str.ToNewCString();
    }
    else {
        // XXX: Where should the defaults really come from
        XP_AppCodeName = PL_strdup("Mozilla");
        XP_AppVersion = PL_strdup("5.0 Netscape/5.0 (Windows;I;x86;en)");
        XP_AppName = PL_strdup("Netscape");

        /* 
         * XXX: Some of these should come from resources and/or 
         * platform-specific code. 
         */
        XP_AppLanguage = PL_strdup("en");
#ifdef XP_WIN
        XP_AppPlatform = PL_strdup("Win32");
#elif defined(XP_MAC)
        XP_AppPlatform = PL_strdup("MacPPC");
#elif defined(XP_UNIX)
        /* XXX: Need to differentiate between various Unisys */
        XP_AppPlatform = PL_strdup("Unix");
#endif
    }
}


NS_DEFINE_IID(kINetServiceIID, NS_INETSERVICE_IID);
NS_IMPL_ISUPPORTS(nsNetlibService,kINetServiceIID);


nsNetlibService::~nsNetlibService()
{
    TRACEMSG(("nsNetlibService is being destroyed...\n"));

    if (NULL != m_stubContext) {
        free_stub_context((MWContext *)m_stubContext);
        m_stubContext = NULL;
    }
    
    NS_IF_RELEASE(mContainer);
    NET_ShutdownNetLib();
}


nsresult nsNetlibService::OpenStream(nsIURL *aUrl, 
                                          nsIStreamListener *aConsumer)
{
    URL_Struct *URL_s;
    nsConnectionInfo *pConn;
    nsIProtocolConnection *pProtocol;
    nsresult result;

    if ((NULL == aConsumer) || (NULL == aUrl)) {
        return NS_FALSE;
    }

    /* Create the nsConnectionInfo object... */
    pConn = new nsConnectionInfo(aUrl, NULL, aConsumer);
    if (NULL == pConn) {
        return NS_FALSE;
    }
    pConn->AddRef();

    /* Create the URLStruct... */
    URL_s = NET_CreateURLStruct(aUrl->GetSpec(), NET_NORMAL_RELOAD);
    if (NULL == URL_s) {
        pConn->Release();
        return NS_FALSE;
    }

    /* 
     * Mark the URL as background loading.  This prevents many
     * client upcall notifications...
     */
    URL_s->load_background = FALSE;

    /*
     * Attach the Data Consumer to the URL_Struct.
     *
     * Both the Data Consumer and the URL_Struct are freed in the 
     * bam_exit_routine(...)
     * 
     * The Reference count on pConn is already 1 so no AddRef() is necessary.
     */
    URL_s->fe_data = pConn;

    /*
     * Give the protocol a chance to initialize any URL_Struct fields...
     *
     * XXX:  Currently the return value form InitializeURLInfo(...) is 
     *       ignored...  Should the connection abort if it fails?
     */
     result = aUrl->QueryInterface(kIProtocolConnectionIID, (void**)&pProtocol);
     if (NS_OK == result) {
         pProtocol->InitializeURLInfo(URL_s);
         NS_RELEASE(pProtocol);
     }

    /* Start the URL load... */
    NET_GetURL (URL_s,                      /* URL_Struct      */
                FO_CACHE_AND_PRESENT,       /* FO_Present_type */
                (MWContext *)m_stubContext, /* MWContext       */
                bam_exit_routine);          /* Exit routine... */

    /* Remember, the URL_s may have been freed ! */

    return NS_OK;
}


nsresult nsNetlibService::OpenBlockingStream(nsIURL *aUrl, 
                                              nsIStreamListener *aConsumer,
                                              nsIInputStream **aNewStream)
{
    URL_Struct *URL_s;
    nsConnectionInfo *pConn;
    nsNetlibStream *pBlockingStream;
    nsIProtocolConnection *pProtocol;
    nsresult result;


    if (NULL == aNewStream) {
        return NS_FALSE;
    }

    if (NULL != aUrl) {
        /* Create the blocking stream... */
        pBlockingStream = new nsBlockingStream();
        if (NULL == pBlockingStream) {
            goto loser;
        }
        /*
         * AddRef the new stream in anticipation of returning it... This will
         * keep it alive :-)
         */
        pBlockingStream->AddRef();

        /* Create the nsConnectionInfo object... */
        pConn = new nsConnectionInfo(aUrl, pBlockingStream, aConsumer);
        if (NULL == pConn) {
            pBlockingStream->Release();
            goto loser;
        }
        pConn->AddRef();

        /* Create the URLStruct... */
        URL_s = NET_CreateURLStruct(aUrl->GetSpec(), NET_NORMAL_RELOAD);
        if (NULL == URL_s) {
            pBlockingStream->Release();
            pConn->Release();
            goto loser;
        }

        /* 
         * Mark the URL as background loading.  This prevents many
         * client upcall notifications...
         */
        URL_s->load_background = FALSE;

        /*
         * Attach the ConnectionInfo object to the URL_Struct.
         *
         * Both the ConnectionInfo and the URL_Struct are freed in the 
         * bam_exit_routine(...)
         * The Reference count on pConn is already 1 so no AddRef() is 
         * necessary.
         */
        URL_s->fe_data = pConn;

        /*
         * Give the protocol a chance to initialize any URL_Struct fields...
         *
         * XXX:  Currently the return value form InitializeURLInfo(...) is 
         *       ignored...  Should the connection abort if it fails?
         */
         result = aUrl->QueryInterface(kIProtocolConnectionIID, (void**)&pProtocol);
         if (NS_OK == result) {
             pProtocol->InitializeURLInfo(URL_s);
             NS_RELEASE(pProtocol);
         }

/*        printf("+++ Loading %s\n", aUrl); */

        /* Start the URL load... */
        NET_GetURL (URL_s,                      /* URL_Struct      */
                    FO_CACHE_AND_PRESENT,       /* FO_Present_type */
                    (MWContext *)m_stubContext, /* MWContext       */
                    bam_exit_routine);          /* Exit routine... */

        /* Remember, the URL_s may have been freed ! */

        *aNewStream = pBlockingStream;
        return NS_OK;
    }

loser:
    *aNewStream = NULL;
    return NS_FALSE;
}

NS_IMETHODIMP
nsNetlibService::GetContainerApplication(nsINetContainerApplication **aContainer)
{
    *aContainer = mContainer;

    NS_IF_ADDREF(mContainer);
    
    return NS_OK;
}

nsresult
nsNetlibService::SetContainerApplication(nsINetContainerApplication *aContainer)
{
    NS_IF_RELEASE(mContainer);

    mContainer = aContainer;
    
    NS_IF_ADDREF(mContainer);

    if (mContainer) {
        nsAutoString str;

        if (XP_AppCodeName) {
            PR_Free((void *)XP_AppCodeName);
        }
        mContainer->GetAppCodeName(str);
        XP_AppCodeName = str.ToNewCString();
        if (XP_AppVersion) {
            PR_Free((void *)XP_AppVersion);
        }
        mContainer->GetAppVersion(str);
        XP_AppVersion = str.ToNewCString();
        if (XP_AppName) {
            PR_Free((void *)XP_AppName);
        }
        mContainer->GetAppName(str);
        XP_AppName = str.ToNewCString();
        if (XP_AppPlatform) {
            PR_Free((void *)XP_AppPlatform);
        }
        mContainer->GetPlatform(str);
        XP_AppPlatform = str.ToNewCString();
        if (XP_AppLanguage) {
            PR_Free((void *)XP_AppLanguage);
        }
        mContainer->GetLanguage(str);
        XP_AppLanguage = str.ToNewCString();
    }
    
    return NS_OK;
}


extern "C" {

static nsNetlibService *pNetlib = NULL;

/*
 * Factory for creating instance of the NetlibService...
 */
NS_NET nsresult NS_NewINetService(nsINetService** aInstancePtrResult,
                                  nsISupports* aOuter)
{
    if (NULL != aOuter) {
        return NS_ERROR_NO_AGGREGATION;
    }

    if (NULL == pNetlib) {
        nsresult res;
        res = NS_InitINetService(NULL);
        if (NS_OK != res) {
            return res;
        }
    }

    return pNetlib->QueryInterface(kINetServiceIID, (void**)aInstancePtrResult);
}

NS_NET nsresult NS_InitINetService(nsINetContainerApplication *aContainer)
{
    /* XXX: For now only allow a single instance of the Netlib Service */
    if (NULL == pNetlib) {
        pNetlib = new nsNetlibService(aContainer);
        if (NULL == pNetlib) {
            return NS_ERROR_OUT_OF_MEMORY;
        }
    }
    else {
        pNetlib->SetContainerApplication(aContainer);
    }

    NS_ADDREF(pNetlib);
    return NS_OK;
}

NS_NET nsresult NS_ShutdownINetService()
{
    nsNetlibService *service = pNetlib;

    NS_IF_RELEASE(service);
    return NS_OK;
}

}; /* extern "C" */


/*
 * This is the generic exit routine for all URLs loaded via the new
 * BAM APIs...
 */
static void bam_exit_routine(URL_Struct *URL_s, int status, MWContext *window_id)
{
    TRACEMSG(("bam_exit_routine was called...\n"));

    if (NULL != URL_s) {
        nsConnectionInfo *pConn = (nsConnectionInfo *)URL_s->fe_data;

#ifdef NOISY
        printf("+++ Finished loading %s\n", URL_s->address);
#endif
        PR_ASSERT(pConn);

        /* Release the ConnectionInfo object held in the URL_Struct. */
        if (pConn) {
            /* 
             * Normally, the stream is closed when the connection has been
             * completed.  However, if the URL exit proc was called directly
             * by NET_GetURL(...), then the stream may still be around...
             */
            if (pConn->pNetStream) {
                pConn->pNetStream->Close();
                pConn->pNetStream->Release();
                pConn->pNetStream = NULL;
            }

            /* 
             * Notify the Data Consumer that the Binding has completed... 
             * Since the Consumer is still available, the stream was never
             * closed (or possibly created).  So, the binding has failed...
             */
            if (pConn->pConsumer) {
                nsAutoString status;

                pConn->pConsumer->OnStopBinding(NS_BINDING_FAILED, status);
                pConn->pConsumer->Release();
                pConn->pConsumer = NULL;
            }

            /* Release the nsConnectionInfo object hanging off of the fe_data */
            URL_s->fe_data = NULL;
            pConn->Release();
        }

        /* Delete the URL_Struct... */
        NET_FreeURLStruct(URL_s);
    }
}