/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsHttpConnectionInfo_h__
#define nsHttpConnectionInfo_h__

#include "nsHttp.h"
#include "nsProxyInfo.h"
#include "nsCOMPtr.h"
#include "nsDependentString.h"
#include "nsString.h"
#include "plstr.h"
#include "nsCRT.h"
#include "nsIProtocolProxyService.h"

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

class nsHttpConnectionInfo
{
public:
    nsHttpConnectionInfo(const nsACString &host, PRInt32 port,
                         nsProxyInfo* proxyInfo,
                         bool usingSSL=false)
        : mRef(0)
        , mProxyInfo(proxyInfo)
        , mUsingSSL(usingSSL)
        , mUsingConnect(false)
    {
        LOG(("Creating nsHttpConnectionInfo @%x\n", this));

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

        if (mUsingHttpProxy) {
            mUsingConnect = mUsingSSL;  // SSL always uses CONNECT
            PRUint32 resolveFlags = 0;
            if (NS_SUCCEEDED(mProxyInfo->GetResolveFlags(&resolveFlags)) &&
                resolveFlags & nsIProtocolProxyService::RESOLVE_ALWAYS_TUNNEL) {
                mUsingConnect = true;
            }
        }

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

    nsrefcnt AddRef()
    {
        nsrefcnt n = NS_AtomicIncrementRefcnt(mRef);
        NS_LOG_ADDREF(this, n, "nsHttpConnectionInfo", sizeof(*this));
        return n;
    }

    nsrefcnt Release()
    {
        nsrefcnt n = NS_AtomicDecrementRefcnt(mRef);
        NS_LOG_RELEASE(this, n, "nsHttpConnectionInfo");
        if (n == 0)
            delete this;
        return n;
    }

    const nsAFlatCString &HashKey() const { return mHashKey; }

    void SetOriginServer(const nsACString &host, PRInt32 port);

    void SetOriginServer(const char *host, PRInt32 port)
    {
        SetOriginServer(nsDependentCString(host), port);
    }
    
    // OK to treat this as an infalible allocation
    nsHttpConnectionInfo* Clone() const;

    const char *ProxyHost() const { return mProxyInfo ? mProxyInfo->Host().get() : 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.
    bool Equals(const nsHttpConnectionInfo *info)
    {
        return mHashKey.Equals(info->HashKey());
    }

    const char   *Host() const           { return mHost.get(); }
    PRInt32       Port() const           { return mPort; }
    nsProxyInfo  *ProxyInfo()            { return mProxyInfo; }
    bool          UsingHttpProxy() const { return mUsingHttpProxy; }
    bool          UsingSSL() const       { return mUsingSSL; }
    bool          UsingConnect() const   { return mUsingConnect; }
    PRInt32       DefaultPort() const    { return mUsingSSL ? NS_HTTPS_DEFAULT_PORT : NS_HTTP_DEFAULT_PORT; }
    void          SetAnonymous(bool anon)         
                                         { mHashKey.SetCharAt(anon ? 'A' : '.', 2); }
    bool          GetAnonymous()         { return mHashKey.CharAt(2) == 'A'; }

    const nsCString &GetHost() { return mHost; }

private:
    nsrefcnt               mRef;
    nsCString              mHashKey;
    nsCString              mHost;
    PRInt32                mPort;
    nsCOMPtr<nsProxyInfo>  mProxyInfo;
    bool                   mUsingHttpProxy;
    bool                   mUsingSSL;
    bool                   mUsingConnect;  // if will use CONNECT with http proxy
};

#endif // nsHttpConnectionInfo_h__
