/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is Mozilla.
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications.  Portions created by Netscape Communications are
 * Copyright (C) 2001 by Netscape Communications.  All
 * Rights Reserved.
 * 
 * Contributor(s): 
 *   Darin Fisher <darin@netscape.com> (original author)
 */

#ifndef nsHttpConnectionInfo_h__
#define nsHttpConnectionInfo_h__

#include "nsHttp.h"
#include "nsIProxyInfo.h"
#include "nsXPIDLString.h"
#include "nsCOMPtr.h"
#include "plstr.h"
#include "nsCRT.h"

//-----------------------------------------------------------------------------
// nsHttpConnectionInfo - holds the properties of a connection
//-----------------------------------------------------------------------------

class nsHttpConnectionInfo
{
public:
    nsHttpConnectionInfo(const char *host, PRInt32 port,
                         nsIProxyInfo* proxyInfo,
                         PRBool usingSSL=PR_FALSE)
        : mRef(0)
        , mProxyInfo(proxyInfo)
        , mUsingSSL(usingSSL) 
    {
        LOG(("Creating nsHttpConnectionInfo @%x\n", this));

        mUsingHttpProxy = (proxyInfo && !nsCRT::strcmp(proxyInfo->Type(), "http"));

        SetOriginServer(host, port);
    }
    
   ~nsHttpConnectionInfo()
    {
        LOG(("Destroying nsHttpConnectionInfo @%x\n", this));
    }

    nsrefcnt AddRef()
    {
        return PR_AtomicIncrement((PRInt32 *) &mRef);
    }

    nsrefcnt Release()
    {
        nsrefcnt n = PR_AtomicDecrement((PRInt32 *) &mRef);
        if (n == 0)
            delete this;
        return n;
    }

    nsresult SetOriginServer(const char* host, PRInt32 port)
    {
        if (host)
            mHost.Adopt(nsCRT::strdup(host));
        mPort = port == -1 ? DefaultPort() : port;
        
        return NS_OK;
    }

    const char *ProxyHost() const { return mProxyInfo ? mProxyInfo->Host() : nsnull; }
    PRInt32     ProxyPort() const { return mProxyInfo ? mProxyInfo->Port() : -1; }
    const char *ProxyType() const { return mProxyInfo ? mProxyInfo->Type() : nsnull; }

    // Compare this connection info to another...
    // Two connections are 'equal' if they end up talking the same
    // protocol to the same server. This is needed to properly manage
    // persistent connections to proxies
    // Note that we don't care about transparent proxies - 
    // it doesn't matter if we're talking via socks or not, since
    // a request will end up at the same host.
    PRBool Equals(const nsHttpConnectionInfo *info)
    {
        // Strictly speaking, we could talk to a proxy on the same port
        // and reuse the connection. Its not worth the extra strcmp.
        if ((info->mUsingHttpProxy != mUsingHttpProxy) ||
            (info->mUsingSSL != mUsingSSL))
            return PR_FALSE;

        // if its a proxy, then compare the proxy servers.
        if (mUsingHttpProxy && !mUsingSSL)
            return (!PL_strcasecmp(info->ProxyHost(), ProxyHost()) &&
                    info->ProxyPort() == ProxyPort());

        // otherwise, just check the hosts
        return (!PL_strcasecmp(info->mHost, mHost) &&
                info->mPort == mPort);

    }

    const char   *Host()           { return mHost; }
    PRInt32       Port()           { return mPort; }
    nsIProxyInfo *ProxyInfo()      { return mProxyInfo; }
    PRBool        UsingHttpProxy() { return mUsingHttpProxy; }
    PRBool        UsingSSL()       { return mUsingSSL; }

    PRInt32       DefaultPort()    { return mUsingSSL ? 443 : 80; }
            
private:
    nsrefcnt               mRef;
    nsXPIDLCString         mHost;
    PRInt32                mPort;
    nsCOMPtr<nsIProxyInfo> mProxyInfo;
    PRPackedBool           mUsingHttpProxy;
    PRPackedBool           mUsingSSL;
};

#endif // nsHttpConnectionInfo_h__