/*
  Copyright (c) 2015, 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 as published by
  the Free Software Foundation; version 2 of the License.

  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 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
*/

#include "abstract_mysql_chain_element_extension.h"
#include <boost/algorithm/string.hpp>
#include <boost/bind.hpp>
#include <sstream>

using namespace Mysql::Tools::Dump;

Abstract_mysql_chain_element_extension::Abstract_mysql_chain_element_extension(
  I_connection_provider* connection_provider,
  Mysql::I_callable<bool, const Mysql::Tools::Base::Message_data&>*
    message_handler, const Mysql_chain_element_options* options)
  : m_connection_provider(connection_provider),
  m_message_handler(message_handler),
  m_options(options),
  m_charset(options->get_program()->get_current_charset() != NULL
    ? options->get_program()->get_current_charset()
    : get_charset_by_csname(
      MYSQL_UNIVERSAL_CLIENT_CHARSET, MY_CS_PRIMARY, MYF(MY_WME)))
{}

Mysql::Tools::Base::Mysql_query_runner*
  Abstract_mysql_chain_element_extension::get_runner() const
{
  return m_connection_provider->get_runner(m_message_handler);
}

I_connection_provider*
  Abstract_mysql_chain_element_extension::get_connection_provider() const
{
  return m_connection_provider;
}

uint64 Abstract_mysql_chain_element_extension::get_server_version()
{
  Mysql::Tools::Base::Mysql_query_runner* runner= this->get_runner();
  ulong version= mysql_get_server_version(runner->get_low_level_connection());
  delete runner;
  return version;
}

std::string Abstract_mysql_chain_element_extension::get_server_version_string()
{
  uint64 version= this->get_server_version();
  std::ostringstream result;
  result << ((version / (100 * 100)) % 100) << "."
    << ((version / (100)) % 100) << "."
    << ((version / (1)) % 100);
  return result.str();
}

int
  Abstract_mysql_chain_element_extension::compare_no_case_latin_with_db_string(
    const std::string& latin_name, const std::string& db_name)
{
  return my_strcasecmp(&my_charset_latin1, latin_name.c_str(),
    db_name.c_str());
}

Mysql::Nullable<std::string>
  Abstract_mysql_chain_element_extension::get_create_statement(
    Mysql::Tools::Base::Mysql_query_runner* runner,
    const std::string& database_name, const std::string& object_name,
    const std::string& object_type, uint field_id/*= 1*/)
{
  std::vector<const Mysql::Tools::Base::Mysql_query_runner::Row*> result;

  runner->run_query_store("SHOW CREATE " + object_type + " "
    + this->get_quoted_object_full_name(database_name, object_name),
    &result);

  Mysql::Nullable<std::string> res;
  if (result.size() > 0)
  {
    if (object_type == "FUNCTION"
        || object_type == "PROCEDURE"
        || object_type == "TRIGGER")
      res= (*result[0])[2];
    else if (object_type == "EVENT")
      res= (*result[0])[3];
    else
      res= (*result[0])[1];
    /*
     TODO: SHOW CREATE will not include schema name except for views
           and triggers. Once fix is done from server below hack will
           be removed.
    */
    if (database_name.size() > 0)
    {
      std::string obj_name_without_quote= this->quote_name(database_name)
           + "." + object_name;
      std::string obj_name_with_quote= this->quote_name(database_name)
           + "." + this->quote_name(object_name);
      size_t pos1= res.value().find(obj_name_without_quote);
      size_t pos2= res.value().find(obj_name_with_quote);

      // if object name does not have db name then include it
      if (pos1 == std::string::npos && pos2 == std::string::npos)
      {
        size_t pos= res.value().find(object_type);
        if (pos != std::string::npos)
        {
          pos= pos + object_type.size() + 1;
          res= res.value().substr(0, pos) + this->quote_name(database_name)
              + "." + res.value().substr(pos);
        }
      }
    }
  }
  Mysql::Tools::Base::Mysql_query_runner::cleanup_result(&result);
  return res;
}

std::string Abstract_mysql_chain_element_extension::quote_name(
  const std::string& name)
{
  char buff[MAX_NAME_LEN * 2 + 3]= { 0 };
  const char* name_str= name.c_str();
  Mysql::Tools::Base::Mysql_query_runner* runner= this->get_runner();
  buff[0]= '`';
  int len= mysql_real_escape_string_quote(runner->get_low_level_connection(),
              buff+1, name_str, (ulong)name.size(), '`');
  buff[len+1]= '`';
  delete runner;
  return std::string(buff);
}

std::string
  Abstract_mysql_chain_element_extension::get_quoted_object_full_name(
    const Abstract_data_object* object)
{
  return this->get_quoted_object_full_name(
    object->get_schema(), object->get_name());
}

std::string
  Abstract_mysql_chain_element_extension::get_quoted_object_full_name(
    const std::string& database_name, const std::string& object_name)
{
  if (database_name != "")
    return this->quote_name(database_name) + "."
    + this->quote_name(object_name);
  return this->quote_name(object_name);
}

const Mysql_chain_element_options*
  Abstract_mysql_chain_element_extension::get_mysql_chain_element_options()
  const
{
  return m_options;
}

CHARSET_INFO* Abstract_mysql_chain_element_extension::get_charset() const
{
  return m_charset;
}