/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 */

#include "Core.h"
#include "Group.h"
#include "WiringHandler.h"
#include "EventHandler.h"
#include "QueueHandler.h"
#include "BrokerContext.h"
#include "qpid/broker/Broker.h"
#include "qpid/broker/Exchange.h"
#include "qpid/broker/Queue.h"
#include "qpid/broker/ExchangeRegistry.h"
#include "qpid/broker/QueueRegistry.h"
#include "qpid/framing/AllInvoker.h"
#include "qpid/framing/Buffer.h"
#include "qpid/framing/reply_exceptions.h"
#include "qpid/log/Statement.h"
#include <boost/intrusive_ptr.hpp>

namespace qpid {
namespace cluster {
using namespace broker;
using framing::FieldTable;

WiringHandler::WiringHandler(Group& g,
                             const boost::intrusive_ptr<QueueHandler>& qh,
                             broker::Broker& b) :
    HandlerBase(g.getEventHandler()),
    broker(b),
    recovery(broker.getQueues(), broker.getExchanges(),
             broker.getLinks(), broker.getDtxManager()),
    queueHandler(qh)
{}

bool WiringHandler::handle(const framing::AMQFrame& frame) {
    return framing::invoke(*this, *frame.getBody()).wasHandled();
}

void WiringHandler::createQueue(const std::string& data) {
    // FIXME aconway 2011-05-25: Needs async completion.
    std::string name;
    if (sender() != self()) { // Created by another member, need to create locally.
        BrokerContext::ScopedSuppressReplication ssr;
        framing::Buffer buf(const_cast<char*>(&data[0]), data.size());
        // TODO aconway 2011-02-21: asymetric - RecoveryManager vs Broker::create*()
        RecoverableQueue::shared_ptr rq = recovery.recoverQueue(buf);
        name = rq->getName();
    }
    else {   // Created locally, Queue and QueueContext already exist.
        framing::Buffer buffer(const_cast<char*>(&data[0]), data.size());
        // FIXME aconway 2011-05-10: implicit knowledge of queue encoding.
        buffer.getShortString(name);
    }
    boost::shared_ptr<broker::Queue> q = broker.getQueues().find(name);
    assert(q);                  // FIXME aconway 2011-05-10: error handling.
    queueHandler->add(q);
    QPID_LOG(debug, "cluster: create queue " << q->getName());
}

void WiringHandler::destroyQueue(const std::string& name) {
    if (sender() == self()) return;
    QPID_LOG(debug, "cluster: destroy queue " << name);
    BrokerContext::ScopedSuppressReplication ssr;
    broker.deleteQueue(name, std::string(), std::string());
}

void WiringHandler::createExchange(const std::string& data) {
    if (sender() == self()) return;
    BrokerContext::ScopedSuppressReplication ssr;
    framing::Buffer buf(const_cast<char*>(&data[0]), data.size());
    // TODO aconway 2011-02-21: asymetric - RecoveryManager vs Broker::create*()
    RecoverableExchange::shared_ptr exchange = recovery.recoverExchange(buf);
    QPID_LOG(debug, "cluster: create exchange " << exchange->getName());
}

void WiringHandler::destroyExchange(const std::string& name) {
    if (sender() == self()) return;
    QPID_LOG(debug, "cluster: destroy exchange " << name);
    BrokerContext::ScopedSuppressReplication ssr;
    broker.getExchanges().destroy(name);
}

void WiringHandler::bind(
    const std::string& queueName, const std::string& exchangeName,
    const std::string& routingKey, const FieldTable& arguments)
{
    if (sender() == self()) return;
    QPID_LOG(debug, "cluster: bind queue=" << queueName
             << " exchange=" << exchangeName
             << " key=" << routingKey
             << " arguments=" << arguments);
    BrokerContext::ScopedSuppressReplication ssr;
    broker.bind(queueName, exchangeName, routingKey, arguments, std::string(), std::string());
}

void WiringHandler::unbind(
    const std::string& queueName, const std::string& exchangeName,
    const std::string& routingKey, const FieldTable& arguments)
{
    if (sender() == self()) return;
    QPID_LOG(debug, "cluster: unbind queue=" << queueName
             << " exchange=" << exchangeName
             << " key=" << routingKey
             << " arguments=" << arguments);
    BrokerContext::ScopedSuppressReplication ssr;
    broker.unbind(queueName, exchangeName, routingKey, std::string(), std::string());
}

}} // namespace qpid::cluster