/*jshint strict: false */
/*global AQL_PARSE, AQL_EXPLAIN, AQL_EXECUTE */

////////////////////////////////////////////////////////////////////////////////
/// @brief ArangoStatement
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2012 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 triAGENS GmbH, Cologne, Germany
///
/// @author Jan Steemann
/// @author Copyright 2012, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

module.isSystem = true;

var ArangoStatement = require("@arangodb/arango-statement-common").ArangoStatement;
var GeneralArrayCursor = require("@arangodb/simple-query-common").GeneralArrayCursor;



////////////////////////////////////////////////////////////////////////////////
/// @brief parse a query and return the results
////////////////////////////////////////////////////////////////////////////////

ArangoStatement.prototype.parse = function () {
  var result = AQL_PARSE(this._query);

  return {
    bindVars : result.parameters,
    collections : result.collections,
    ast: result.ast
  };
};

////////////////////////////////////////////////////////////////////////////////
/// @brief explain a query and return the results
////////////////////////////////////////////////////////////////////////////////

ArangoStatement.prototype.explain = function (options) {
  var opts = this._options || { };
  if (typeof opts === 'object' && typeof options === 'object') {
    Object.keys(options).forEach(function(o) {
      // copy options
      opts[o] = options[o];
    });
  }

  return AQL_EXPLAIN(this._query, this._bindVars, opts);
};

////////////////////////////////////////////////////////////////////////////////
/// @brief execute the query
///
/// This will return a cursor with the query results in case of success.
////////////////////////////////////////////////////////////////////////////////

ArangoStatement.prototype.execute = function () {
  var opts = this._options || { };
  if (typeof opts === 'object') {
    opts._doCount = this._doCount;
    if (this._cache !== undefined) {
      opts.cache = this._cache;
    } 
  }
  
  var result = AQL_EXECUTE(this._query, this._bindVars, opts);
  return new GeneralArrayCursor(result.json, 0, null, result);
};


exports.ArangoStatement = ArangoStatement;