/*jshint strict: false */

////////////////////////////////////////////////////////////////////////////////
/// @brief Tasks
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2011-2013 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 Wilfried Goesgens
/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

var internal = require("internal");
var arangosh = require("@arangodb/arangosh");
var arangodb = require("@arangodb");
var throwBadParameter = arangodb.throwBadParameter;
var db = internal.db;

var API = '/_api/tasks';

////////////////////////////////////////////////////////////////////////////////
/// @brief creates a new task
////////////////////////////////////////////////////////////////////////////////
var getTask = function (options) {
  var URL = API;

  if (typeof(options) === 'object') {
    if (!options.hasOwnProperty("id")) {
      throwBadParameter("options has to contain an id property.");
    }
    URL += '/' + encodeURIComponent(options.id);
  }
  else {
    if (typeof(options) !== 'undefined') {
      URL += '/' + encodeURIComponent(options);
    }
  }
  var requestResult = db._connection.GET(URL);

  arangosh.checkRequestResult(requestResult);

  return requestResult;
};

var registerTask = function (options) {
  var URL = API;
  var requestResult;

  if (typeof(options) !== 'object') {
    throwBadParameter("options has to be an object.");
  }

  if (typeof(options.command ) === 'function') {
    options.command = '(' + String(options.command) + ')(params)';
  }
  if (options.hasOwnProperty("id")) {
    URL += '/' + options.id;    
    requestResult = db._connection.PUT(URL, JSON.stringify(options));
  }
  else {
    requestResult = db._connection.POST(URL, JSON.stringify(options));
  }

  arangosh.checkRequestResult(requestResult);

  return requestResult;
};

var unregisterTask = function (options) {
  var deleteId;
  if (typeof(options) === 'object') {
    if (!options.hasOwnProperty("id")) {
      throwBadParameter("options has to contain an id property.");
    }
    deleteId = options.id;
  }
  else {
    if (typeof(options) === 'undefined') {
      throwBadParameter("options has to contain an id.");
    }
    deleteId = options;
  }
  var requestResult = db._connection.DELETE(API + '/' + deleteId);

  arangosh.checkRequestResult(requestResult);

  return requestResult;
};

exports.register    = registerTask;
exports.unregister  = unregisterTask;
exports.get         = getTask;