////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed 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.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
////////////////////////////////////////////////////////////////////////////////

#include "V8PeriodicTask.h"

#include <velocypack/Builder.h>
#include <velocypack/velocypack-aliases.h>

#include "Basics/json.h"
#include "Dispatcher/Dispatcher.h"
#include "Dispatcher/DispatcherFeature.h"
#include "V8Server/V8Job.h"
#include "VocBase/server.h"

using namespace arangodb;
using namespace arangodb::application_features;
using namespace arangodb::rest;

V8PeriodicTask::V8PeriodicTask(std::string const& id, std::string const& name,
                               TRI_vocbase_t* vocbase, 
                               double offset, double period,
                               std::string const& command,
                               std::shared_ptr<VPackBuilder> parameters,
                               bool allowUseDatabase)
    : Task(id, name),
      PeriodicTask(id, offset, period),
      _vocbase(vocbase),
      _command(command),
      _parameters(parameters),
      _created(TRI_microtime()),
      _allowUseDatabase(allowUseDatabase) {
  TRI_ASSERT(vocbase != nullptr);

  // increase reference counter for the database used
  TRI_UseVocBase(_vocbase);
}

V8PeriodicTask::~V8PeriodicTask() {
  // decrease reference counter for the database used
  TRI_ReleaseVocBase(_vocbase);
}

////////////////////////////////////////////////////////////////////////////////
/// @brief get a task specific description in JSON format
////////////////////////////////////////////////////////////////////////////////

void V8PeriodicTask::getDescription(VPackBuilder& builder) const {
  PeriodicTask::getDescription(builder);
  TRI_ASSERT(builder.isOpenObject());

  builder.add("created", VPackValue(_created));
  builder.add("command", VPackValue(_command));
  builder.add("database", VPackValue(_vocbase->_name));
}

////////////////////////////////////////////////////////////////////////////////
/// @brief handles the next tick
////////////////////////////////////////////////////////////////////////////////

bool V8PeriodicTask::handlePeriod() {
  std::unique_ptr<Job> job(new V8Job(
      _vocbase, "(function (params) { " + _command + " } )(params);",
      _parameters, _allowUseDatabase));

  DispatcherFeature::DISPATCHER->addJob(job);

  return true;
}