/*
 Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License, version 2.0,
 as published by the Free Software Foundation.

 This program is also distributed with certain software (including
 but not limited to OpenSSL) that is licensed under separate terms,
 as designated in a particular file or component or in included license
 documentation.  The authors of MySQL hereby grant you an additional
 permission to link the program and your derivative works with the
 separately licensed software that they have included with MySQL.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License, version 2.0, for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
 */

'use strict';

var mynode = require("database-jones");
var DEBUG, DETAIL;

var implementation = function() {
};

implementation.prototype.close = function(callback) {
  if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.close', this);
  this.session.close(callback);
};

implementation.prototype.initialize = function(options, callback) {
  var impl = this;

  // Deferred initialization of file-level DEBUG and DETAIL
  DEBUG = JSCRUND.udebug.is_debug();
  DETAIL = JSCRUND.udebug.is_detail();

  // Set options
  this.options = options;

  if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.initialize', this);

  // set up the session
  mynode.openSession(options.properties, options.annotations, function(err, session) {
    if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.initialize callback err:', err);
    if (err) {
      console.log(err);
      process.exit(1);
    }
    impl.session = session;   // Initialize session
    impl.context = session;   // This will be changed to batch in createBatch
    impl.batch   = null;      // This will be set in createBatch
    callback(err);
  });
};

implementation.prototype.persist = function(parameters, callback) {
  if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.persist object:', parameters.object);
  // account for object construction
  var o = new parameters.object.constructor();
  o.init(parameters.object.id);
  this.context.persist(o, function(err) {
    callback(err);
  });
};

implementation.prototype.find = function(parameters, callback) {
  if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.find key:', parameters.key);
  this.context.find(parameters.object.constructor, parameters.key, function(err, found) {
    parameters.object.verify(found);
    callback(err);
  });
};

implementation.prototype.remove = function(parameters, callback) {
  if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.remove key:', parameters.key);
  this.context.remove(parameters.object.constructor, parameters.key, function(err) {
    callback(err);
  });
};

implementation.prototype.setVarchar = function(parameters, callback) {
  if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.setVarchar key:', parameters.key);
   parameters.object.cvarchar_def = this.options.B_varchar_value;
   this.context.update(parameters.object, function(err) {
    callback(err);
  });
};

implementation.prototype.clearVarchar = function(parameters, callback) {
   if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.clearVarchar key:', parameters.key);
  parameters.object.cvarchar_def = null;
  this.context.update(parameters.object, function(err) {
    callback(err);
  });
};

implementation.prototype.createBatch = function(callback) {
  if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.createBatch');
  this.batch = this.session.createBatch();
  this.context = this.batch;
  callback(null);
};

implementation.prototype.executeBatch = function(callback) {
  JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.executeBatch');
  this.context.execute(function(err) {
    callback(err);
  });
  this.context = this.session;
};

implementation.prototype.begin = function(callback) {
  if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.begin');
  // begin() signals programming error by exception if no callback provided
  this.session.currentTransaction().begin(function(err) {
    callback(err);
  });
};

implementation.prototype.commit = function(callback) {
  if(DETAIL) JSCRUND.udebug.log_detail('jscrund_mysqljs implementation.commit');
  this.session.currentTransaction().commit(function(err) {
    callback(err);
  });
};

exports.implementation = implementation;