/*

 * Copyright (C) 2009 Google Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are

 * met:

 *

 *     * Redistributions of source code must retain the above copyright

 * notice, this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above

 * copyright notice, this list of conditions and the following disclaimer

 * in the documentation and/or other materials provided with the

 * distribution.

 *     * Neither the name of Google Inc. nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "SocketStreamHandle.h"

#if ENABLE(WEB_SOCKETS)

#include "Logging.h"

#include "NotImplemented.h"

#include "SocketStreamHandleClient.h"

#include "WebData.h"

#include "WebKit.h"

#include "WebKitClient.h"

#include "WebSocketStreamHandle.h"

#include "WebSocketStreamHandleClient.h"

#include "WebURL.h"

#include <wtf/PassOwnPtr.h>

using namespace WebKit;

namespace WebCore {

class SocketStreamHandleInternal : public WebSocketStreamHandleClient {

public:

    static PassOwnPtr<SocketStreamHandleInternal> create(SocketStreamHandle* handle)

    {

        return new SocketStreamHandleInternal(handle);

    }

    virtual ~SocketStreamHandleInternal();

    void connect(const KURL&);

    int send(const char*, int);

    void close();

    virtual void didOpenStream(WebSocketStreamHandle*, int);

    virtual void didSendData(WebSocketStreamHandle*, int);

    virtual void didReceiveData(WebSocketStreamHandle*, const WebData&);

    virtual void didClose(WebSocketStreamHandle*);

    virtual void didFail(WebSocketStreamHandle*, const WebSocketStreamError&);

private:

    explicit SocketStreamHandleInternal(SocketStreamHandle*);

    SocketStreamHandle* m_handle;

    OwnPtr<WebSocketStreamHandle> m_socket;

    int m_maxPendingSendAllowed;

    int m_pendingAmountSent;

};

SocketStreamHandleInternal::SocketStreamHandleInternal(SocketStreamHandle* handle)

    : m_handle(handle)

    , m_maxPendingSendAllowed(0)

    , m_pendingAmountSent(0)

{

}

SocketStreamHandleInternal::~SocketStreamHandleInternal()

{

    m_handle = 0;

}

void SocketStreamHandleInternal::connect(const KURL& url)

{

    m_socket.set(webKitClient()->createSocketStreamHandle());

    LOG(Network, "connect");

    ASSERT(m_socket.get());

    m_socket->connect(url, this);

}

int SocketStreamHandleInternal::send(const char* data, int len)

{

    LOG(Network, "send len=%d", len);

    ASSERT(m_socket.get());

    if (m_pendingAmountSent + len >= m_maxPendingSendAllowed)

        len = m_maxPendingSendAllowed - m_pendingAmountSent - 1;

    if (len <= 0)

        return len;

    WebData webdata(data, len);

    if (m_socket->send(webdata)) {

        m_pendingAmountSent += len;

        LOG(Network, "sent");

        return len;

    }

    LOG(Network, "busy. buffering");

    return 0;

}

void SocketStreamHandleInternal::close()

{

    LOG(Network, "close");

    m_socket->close();

}

void SocketStreamHandleInternal::didOpenStream(WebSocketStreamHandle* socketHandle, int maxPendingSendAllowed)

{

    LOG(Network, "SocketStreamHandleInternal::didOpen %d",

        maxPendingSendAllowed);

    ASSERT(maxPendingSendAllowed > 0);

    if (m_handle && m_socket.get()) {

        ASSERT(socketHandle == m_socket.get());

        m_maxPendingSendAllowed = maxPendingSendAllowed;

        m_handle->m_state = SocketStreamHandleBase::Open;

        if (m_handle->m_client) {

            m_handle->m_client->didOpen(m_handle);

            return;

        }

    }

    LOG(Network, "no m_handle or m_socket?");

}

void SocketStreamHandleInternal::didSendData(WebSocketStreamHandle* socketHandle, int amountSent)

{

    LOG(Network, "SocketStreamHandleInternal::didSendData %d", amountSent);

    ASSERT(amountSent > 0);

    if (m_handle && m_socket.get()) {

        ASSERT(socketHandle == m_socket.get());

        m_pendingAmountSent -= amountSent;

        ASSERT(m_pendingAmountSent >= 0);

        m_handle->sendPendingData();

    }

}

void SocketStreamHandleInternal::didReceiveData(WebSocketStreamHandle* socketHandle, const WebData& data)

{

    LOG(Network, "didReceiveData");

    if (m_handle && m_socket.get()) {

        ASSERT(socketHandle == m_socket.get());

        if (m_handle->m_client)

            m_handle->m_client->didReceiveData(m_handle, data.data(), data.size());

    }

}

void SocketStreamHandleInternal::didClose(WebSocketStreamHandle* socketHandle)

{

    LOG(Network, "didClose");

    if (m_handle && m_socket.get()) {

        ASSERT(socketHandle == m_socket.get());

        m_socket.clear();

        SocketStreamHandle* h = m_handle;

        m_handle = 0;

        if (h->m_client)

            h->m_client->didClose(h);

    }

}

void SocketStreamHandleInternal::didFail(WebSocketStreamHandle* socketHandle, const WebSocketStreamError& err)

{

    LOG(Network, "didFail");

    if (m_handle && m_socket.get()) {

        ASSERT(socketHandle == m_socket.get());

        m_socket.clear();

        SocketStreamHandle* h = m_handle;

        m_handle = 0;

        if (h->m_client)

            h->m_client->didClose(h);  // didFail(h, err);

    }

}

// FIXME: auth

// SocketStreamHandle ----------------------------------------------------------

SocketStreamHandle::SocketStreamHandle(const KURL& url, SocketStreamHandleClient* client)

    : SocketStreamHandleBase(url, client)

{

    m_internal = SocketStreamHandleInternal::create(this);

    m_internal->connect(m_url);

}

SocketStreamHandle::~SocketStreamHandle()

{

    setClient(0);

    m_internal.clear();

}

int SocketStreamHandle::platformSend(const char* buf, int len)

{

    if (!m_internal.get())

        return 0;

    return m_internal->send(buf, len);

}

void SocketStreamHandle::platformClose()

{

    if (m_internal.get())

        m_internal->close();

}

void SocketStreamHandle::didReceiveAuthenticationChallenge(const AuthenticationChallenge& challenge)

{

    if (m_client)

        m_client->didReceiveAuthenticationChallenge(this, challenge);

}

void SocketStreamHandle::receivedCredential(const AuthenticationChallenge& challenge, const Credential& credential)

{

    notImplemented();

}

void SocketStreamHandle::receivedRequestToContinueWithoutCredential(const AuthenticationChallenge& challenge)

{

    notImplemented();

}

}  // namespace WebCore

#endif  // ENABLE(WEB_SOCKETS)