/* Copyright (C) 2003 MySQL AB

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#include <ndb_global.h>
#include <ndb_opts.h>
#include <Vector.hpp>
#include <ndb_limits.h>
#include <NdbTCP.h>
#include <NdbMem.h>
#include <NdbOut.hpp>
#include <OutputStream.hpp>
#include <NDBT_ReturnCodes.h>

#include "consumer_restore.hpp"
#include "consumer_printer.hpp"

extern FilteredNdbOut err;
extern FilteredNdbOut info;
extern FilteredNdbOut debug;

static int ga_nodeId = 0;
static int ga_nParallelism = 128;
static int ga_backupId = 0;
static bool ga_dont_ignore_systab_0 = false;
static Vector<class BackupConsumer *> g_consumers;
static BackupPrinter* g_printer = NULL;

static const char* default_backupPath = "." DIR_SEPARATOR;
static const char* ga_backupPath = default_backupPath;

const char *opt_ndb_database= NULL;
const char *opt_ndb_table= NULL;
unsigned int opt_verbose;
unsigned int opt_hex_format;
Vector<BaseString> g_databases;
Vector<BaseString> g_tables;
NdbRecordPrintFormat g_ndbrecord_print_format;

NDB_STD_OPTS_VARS;

/**
 * print and restore flags
 */
static bool ga_restore = false;
static bool ga_print = false;
static int _print = 0;
static int _print_meta = 0;
static int _print_data = 0;
static int _print_log = 0;
static int _restore_data = 0;
static int _restore_meta = 0;
BaseString g_options("ndb_restore");

const char *load_default_groups[]= { "mysql_cluster","ndb_restore",0 };

enum ndb_restore_options {
  OPT_PRINT= NDB_STD_OPTIONS_LAST,
  OPT_PRINT_DATA,
  OPT_PRINT_LOG,
  OPT_PRINT_META,
  OPT_BACKUP_PATH,
  OPT_HEX_FORMAT,
  OPT_FIELDS_ENCLOSED_BY,
  OPT_FIELDS_TERMINATED_BY,
  OPT_FIELDS_OPTIONALLY_ENCLOSED_BY,
  OPT_LINES_TERMINATED_BY,
  OPT_APPEND,
  OPT_VERBOSE
};
static const char *opt_fields_enclosed_by= NULL;
static const char *opt_fields_terminated_by= NULL;
static const char *opt_fields_optionally_enclosed_by= NULL;
static const char *opt_lines_terminated_by= NULL;

static const char *tab_path= NULL;
static int opt_append;

static struct my_option my_long_options[] =
{
  NDB_STD_OPTS("ndb_restore"),
  { "connect", 'c', "same as --connect-string",
    (gptr*) &opt_connect_str, (gptr*) &opt_connect_str, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  { "nodeid", 'n', "Backup files from node with id",
    (gptr*) &ga_nodeId, (gptr*) &ga_nodeId, 0,
    GET_INT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  { "backupid", 'b', "Backup id",
    (gptr*) &ga_backupId, (gptr*) &ga_backupId, 0,
    GET_INT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  { "restore_data", 'r', 
    "Restore table data/logs into NDB Cluster using NDBAPI", 
    (gptr*) &_restore_data, (gptr*) &_restore_data,  0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0 },
  { "restore_meta", 'm',
    "Restore meta data into NDB Cluster using NDBAPI",
    (gptr*) &_restore_meta, (gptr*) &_restore_meta,  0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0 },
  { "parallelism", 'p',
    "No of parallel transactions during restore of data."
    "(parallelism can be 1 to 1024)", 
    (gptr*) &ga_nParallelism, (gptr*) &ga_nParallelism, 0,
    GET_INT, REQUIRED_ARG, 128, 1, 1024, 0, 1, 0 },
  { "print", OPT_PRINT, "Print metadata, data and log to stdout",
    (gptr*) &_print, (gptr*) &_print, 0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0 },
  { "print_data", OPT_PRINT_DATA, "Print data to stdout", 
    (gptr*) &_print_data, (gptr*) &_print_data, 0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0 },
  { "print_meta", OPT_PRINT_META, "Print meta data to stdout",
    (gptr*) &_print_meta, (gptr*) &_print_meta,  0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0 },
  { "print_log", OPT_PRINT_LOG, "Print log to stdout",
    (gptr*) &_print_log, (gptr*) &_print_log,  0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0 },
  { "backup_path", OPT_BACKUP_PATH, "Path to backup files",
    (gptr*) &ga_backupPath, (gptr*) &ga_backupPath, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  { "dont_ignore_systab_0", 'f',
    "Experimental. Do not ignore system table during restore.", 
    (gptr*) &ga_dont_ignore_systab_0, (gptr*) &ga_dont_ignore_systab_0, 0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0 },
  { "fields-enclosed-by", OPT_FIELDS_ENCLOSED_BY,
    "Fields are enclosed by ...",
    (gptr*) &opt_fields_enclosed_by, (gptr*) &opt_fields_enclosed_by, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  { "fields-terminated-by", OPT_FIELDS_TERMINATED_BY,
    "Fields are terminated by ...",
    (gptr*) &opt_fields_terminated_by,
    (gptr*) &opt_fields_terminated_by, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  { "fields-optionally-enclosed-by", OPT_FIELDS_OPTIONALLY_ENCLOSED_BY,
    "Fields are optionally enclosed by ...",
    (gptr*) &opt_fields_optionally_enclosed_by,
    (gptr*) &opt_fields_optionally_enclosed_by, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  { "hex", OPT_HEX_FORMAT, "print binary types in hex format", 
    (gptr*) &opt_hex_format, (gptr*) &opt_hex_format, 0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0 },
  { "tab", 'T', "Creates tab separated textfile for each table to "
    "given path. (creates .txt files)",
   (gptr*) &tab_path, (gptr*) &tab_path, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
  { "append", OPT_APPEND, "for --tab append data to file", 
    (gptr*) &opt_append, (gptr*) &opt_append, 0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0 },
  { "lines-terminated-by", OPT_LINES_TERMINATED_BY, "",
    (gptr*) &opt_lines_terminated_by, (gptr*) &opt_lines_terminated_by, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  { "verbose", OPT_VERBOSE,
    "verbosity", 
    (gptr*) &opt_verbose, (gptr*) &opt_verbose, 0,
    GET_INT, REQUIRED_ARG, 1, 0, 255, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
};

static void short_usage_sub(void)
{
  printf("Usage: %s [OPTIONS] [<path to backup files>]\n", my_progname);
}
static void usage()
{
  short_usage_sub();
  ndb_std_print_version();
  print_defaults(MYSQL_CONFIG_NAME,load_default_groups);
  puts("");
  my_print_help(my_long_options);
  my_print_variables(my_long_options);
}
static my_bool
get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
	       char *argument)
{
#ifndef DBUG_OFF
  opt_debug= "d:t:O,/tmp/ndb_restore.trace";
#endif
  ndb_std_get_one_option(optid, opt, argument);
  switch (optid) {
  case OPT_VERBOSE:
    info.setThreshold(255-opt_verbose);
    break;
  case 'n':
    if (ga_nodeId == 0)
    {
      err << "Error in --nodeid,-n setting, see --help";
      exit(NDBT_ProgramExit(NDBT_WRONGARGS));
    }
    info.setLevel(254);
    info << "Nodeid = " << ga_nodeId << endl;
    break;
  case 'b':
    if (ga_backupId == 0)
    {
      err << "Error in --backupid,-b setting, see --help";
      exit(NDBT_ProgramExit(NDBT_WRONGARGS));
    }
    info.setLevel(254);
    info << "Backup Id = " << ga_backupId << endl;
    break;
  }
  return 0;
}
bool
readArguments(int *pargc, char*** pargv) 
{
  Uint32 i;
  debug << "Load defaults" << endl;
  const char *load_default_groups[]= { "mysql_cluster","ndb_restore",0 };

  load_defaults("my",load_default_groups,pargc,pargv);
  debug << "handle_options" << endl;
  if (handle_options(pargc, pargv, my_long_options, get_one_option))
  {
    exit(NDBT_ProgramExit(NDBT_WRONGARGS));
  }

  g_printer = new BackupPrinter();
  if (g_printer == NULL)
    return false;

  BackupRestore* restore = new BackupRestore(ga_nParallelism);
  if (restore == NULL) 
  {
    delete g_printer;
    g_printer = NULL;
    return false;
  }

  if (_print) 
  {
    ga_print = true;
    ga_restore = true;
    g_printer->m_print = true;
  } 
  if (_print_meta) 
  {
    ga_print = true;
    g_printer->m_print_meta = true;
  }
  if (_print_data) 
  {
    ga_print = true;
    g_printer->m_print_data = true;
  }
  if (_print_log) 
  {
    ga_print = true;
    g_printer->m_print_log = true;
  }

  if (_restore_data)
  {
    ga_restore = true;
    restore->m_restore = true; 
  }

  if (_restore_meta)
  {
    //    ga_restore = true;
    restore->m_restore_meta = true;
  }

  {
    BackupConsumer * c = g_printer;
    g_consumers.push_back(c);
  }
  {
    BackupConsumer * c = restore;
    g_consumers.push_back(c);
  }
  for (;;)
  {
    int i= 0;
    if (ga_backupPath == default_backupPath)
    {
      // Set backup file path
      if ((*pargv)[i] == NULL)
        break;
      ga_backupPath = (*pargv)[i++];
    }
    if ((*pargv)[i] == NULL)
      break;
    g_databases.push_back((*pargv)[i++]);
    while ((*pargv)[i] != NULL)
    {
      g_tables.push_back((*pargv)[i++]);
    }
    break;
  }
  info.setLevel(254);
  info << "backup path = " << ga_backupPath << endl;
  if (g_databases.size() > 0)
  {
    info << "Restoring only from database " << g_databases[0].c_str() << endl;
    if (g_tables.size() > 0)
      info << "Restoring only tables:";
    for (unsigned i= 0; i < g_tables.size(); i++)
    {
      info << " " << g_tables[i].c_str();
    }
    if (g_tables.size() > 0)
      info << endl;
  }
  /*
    the below formatting follows the formatting from mysqldump
    do not change unless to adopt to changes in mysqldump
  */
  g_ndbrecord_print_format.fields_enclosed_by=
    opt_fields_enclosed_by ? opt_fields_enclosed_by : "";
  g_ndbrecord_print_format.fields_terminated_by=
    opt_fields_terminated_by ? opt_fields_terminated_by : "\t";
  g_ndbrecord_print_format.fields_optionally_enclosed_by=
    opt_fields_optionally_enclosed_by ? opt_fields_optionally_enclosed_by : "";
  g_ndbrecord_print_format.lines_terminated_by=
    opt_lines_terminated_by ? opt_lines_terminated_by : "\n";
  if (g_ndbrecord_print_format.fields_optionally_enclosed_by[0] == '\0')
    g_ndbrecord_print_format.null_string= "\\N";
  else
    g_ndbrecord_print_format.null_string= "";
  g_ndbrecord_print_format.hex_prefix= "";
  g_ndbrecord_print_format.hex_format= opt_hex_format;
  return true;
}

void
clearConsumers()
{
  for(Uint32 i= 0; i<g_consumers.size(); i++)
    delete g_consumers[i];
  g_consumers.clear();
}

static inline bool
checkSysTable(const TableS* table)
{
  return ga_dont_ignore_systab_0 || ! table->getSysTable();
}

static inline bool
checkSysTable(const RestoreMetaData& metaData, uint i)
{
  assert(i < metaData.getNoOfTables());
  return checkSysTable(metaData[i]);
}

static inline bool
isBlobTable(const TableS* table)
{
  return table->getMainTable() != NULL;
}

static inline bool
isIndex(const TableS* table)
{
  const NdbTableImpl & tmptab = NdbTableImpl::getImpl(* table->m_dictTable);
  return (int) tmptab.m_indexType != (int) NdbDictionary::Index::Undefined;
}

static inline bool
checkDbAndTableName(const TableS* table)
{
  if (g_tables.size() == 0 &&
      g_databases.size() == 0)
    return true;
  if (g_databases.size() == 0)
    g_databases.push_back("TEST_DB");

  // Filter on the main table name for indexes and blobs
  const char *table_name;
  if (isBlobTable(table))
    table_name= table->getMainTable()->getTableName();
  else if (isIndex(table))
    table_name=
      NdbTableImpl::getImpl(*table->m_dictTable).m_primaryTable.c_str();
  else
    table_name= table->getTableName();

  unsigned i;
  for (i= 0; i < g_databases.size(); i++)
  {
    if (strncmp(table_name, g_databases[i].c_str(),
                g_databases[i].length()) == 0 &&
        table_name[g_databases[i].length()] == '/')
    {
      // we have a match
      if (g_databases.size() > 1 || g_tables.size() == 0)
        return true;
      break;
    }
  }
  if (i == g_databases.size())
    return false; // no match found

  while (*table_name != '/') table_name++;
  table_name++;
  while (*table_name != '/') table_name++;
  table_name++;

  for (i= 0; i < g_tables.size(); i++)
  {
    if (strcmp(table_name, g_tables[i].c_str()) == 0)
    {
      // we have a match
      return true;
    }
  }
  return false;
}

static void
free_data_callback()
{
  for(Uint32 i= 0; i < g_consumers.size(); i++) 
    g_consumers[i]->tuple_free();
}

const char * g_connect_string = 0;
static void exitHandler(int code)
{
  NDBT_ProgramExit(code);
  if (opt_core)
    abort();
  else
    exit(code);
}

int
main(int argc, char** argv)
{
  NDB_INIT(argv[0]);

  debug << "Start readArguments" << endl;
  if (!readArguments(&argc, &argv))
  {
    exitHandler(NDBT_FAILED);
  }

  g_options.appfmt(" -b %d", ga_backupId);
  g_options.appfmt(" -n %d", ga_nodeId);
  if (_restore_meta)
    g_options.appfmt(" -m");
  if (_restore_data)
    g_options.appfmt(" -r");
  g_options.appfmt(" -p %d", ga_nParallelism);

  g_connect_string = opt_connect_str;

  /**
   * we must always load meta data, even if we will only print it to stdout
   */
  debug << "Start restoring meta data" << endl;
  RestoreMetaData metaData(ga_backupPath, ga_nodeId, ga_backupId);
  if (!metaData.readHeader())
  {
    err << "Failed to read " << metaData.getFilename() << endl << endl;
    exitHandler(NDBT_FAILED);
  }

  const BackupFormat::FileHeader & tmp = metaData.getFileHeader();
  const Uint32 version = tmp.NdbVersion;
  
  char buf[NDB_VERSION_STRING_BUF_SZ];
  info.setLevel(254);
  info << "Ndb version in backup files: " 
       <<  getVersionString(version, 0, buf, sizeof(buf)) << endl;
  
  /**
   * check wheater we can restore the backup (right version).
   */
  if (version > NDB_VERSION)
  {
    err << "Restore program older than backup version. Not supported. "
        << "Use new restore program" << endl;
    exitHandler(NDBT_FAILED);
  }

  debug << "Load content" << endl;
  int res  = metaData.loadContent();
  
  if (res == 0)
  {
    err << "Restore: Failed to load content" << endl;
    exitHandler(NDBT_FAILED);
  }
  debug << "Get no of Tables" << endl; 
  if (metaData.getNoOfTables() == 0) 
  {
    err << "The backup contains no tables" << endl;
    exitHandler(NDBT_FAILED);
  }
  debug << "Validate Footer" << endl;

  if (!metaData.validateFooter()) 
  {
    err << "Restore: Failed to validate footer." << endl;
    exitHandler(NDBT_FAILED);
  }
  debug << "Init Backup objects" << endl;
  Uint32 i;
  for(i= 0; i < g_consumers.size(); i++)
  {
    if (!g_consumers[i]->init())
    {
      clearConsumers();
      err << "Failed to initialize consumers" << endl;
      exitHandler(NDBT_FAILED);
    }

  }

  Vector<OutputStream *> table_output(metaData.getNoOfTables());
  debug << "Restoring tables" << endl;
  for(i = 0; i<metaData.getNoOfTables(); i++)
  {
    const TableS *table= metaData[i];
    table_output.push_back(NULL);
    if (!checkDbAndTableName(table))
      continue;
    if (checkSysTable(table))
    {
      if (!tab_path || isBlobTable(table) || isIndex(table))
      {
        table_output[i]= ndbout.m_out;
      }
      else
      {
        FILE* res;
        char filename[FN_REFLEN], tmp_path[FN_REFLEN];
        const char *table_name;
        table_name= table->getTableName();
        while (*table_name != '/') table_name++;
        table_name++;
        while (*table_name != '/') table_name++;
        table_name++;
        convert_dirname(tmp_path, tab_path, NullS);
        res= my_fopen(fn_format(filename, table_name, tmp_path, ".txt", 4),
                      opt_append ?
                      O_WRONLY|O_APPEND|O_CREAT :
                      O_WRONLY|O_TRUNC|O_CREAT,
                      MYF(MY_WME));
        if (res == 0)
        {
          exitHandler(NDBT_FAILED);
        }
        FileOutputStream *f= new FileOutputStream(res);
        table_output[i]= f;
      }
      for(Uint32 j= 0; j < g_consumers.size(); j++)
	if (!g_consumers[j]->table(* table))
	{
	  err << "Restore: Failed to restore table: `";
          err << table->getTableName() << "` ... Exiting " << endl;
	  exitHandler(NDBT_FAILED);
        }
    }
  }
  debug << "Close tables" << endl; 
  for(i= 0; i < g_consumers.size(); i++)
    if (!g_consumers[i]->endOfTables())
    {
      err << "Restore: Failed while closing tables" << endl;
      exitHandler(NDBT_FAILED);
    } 
  debug << "Iterate over data" << endl; 
  if (ga_restore || ga_print) 
  {
    if(_restore_data || _print_data)
    {
      RestoreDataIterator dataIter(metaData, &free_data_callback);
      
      // Read data file header
      if (!dataIter.readHeader())
      {
	err << "Failed to read header of data file. Exiting..." << endl;
	exitHandler(NDBT_FAILED);
      }
      
      
      while (dataIter.readFragmentHeader(res= 0))
      {
	const TupleS* tuple;
	while ((tuple = dataIter.getNextTuple(res= 1)) != 0)
	{
          const TableS* table = tuple->getTable();
          OutputStream *output = table_output[table->getLocalId()];
          if (!output)
            continue;
          OutputStream *tmp = ndbout.m_out;
          ndbout.m_out = output;
          for(Uint32 j= 0; j < g_consumers.size(); j++) 
            g_consumers[j]->tuple(* tuple);
          ndbout.m_out =  tmp;
	} // while (tuple != NULL);
	
	if (res < 0)
	{
	  err <<" Restore: An error occured while restoring data. Exiting...";
          err << endl;
	  exitHandler(NDBT_FAILED);
	}
	if (!dataIter.validateFragmentFooter()) {
	  err << "Restore: Error validating fragment footer. ";
          err << "Exiting..." << endl;
	  exitHandler(NDBT_FAILED);
	}
      } // while (dataIter.readFragmentHeader(res))
      
      if (res < 0)
      {
	err << "Restore: An error occured while restoring data. Exiting... "
	    << "res= " << res << endl;
	exitHandler(NDBT_FAILED);
      }
      
      
      dataIter.validateFooter(); //not implemented
      
      for (i= 0; i < g_consumers.size(); i++)
	g_consumers[i]->endOfTuples();
    }

    if(_restore_data || _print_log)
    {
      RestoreLogIterator logIter(metaData);
      if (!logIter.readHeader())
      {
	err << "Failed to read header of data file. Exiting..." << endl;
	exitHandler(NDBT_FAILED);
      }
      
      const LogEntry * logEntry = 0;
      while ((logEntry = logIter.getNextLogEntry(res= 0)) != 0)
      {
        const TableS* table = logEntry->m_table;
        OutputStream *output = table_output[table->getLocalId()];
        if (!output)
          continue;
        for(Uint32 j= 0; j < g_consumers.size(); j++)
          g_consumers[j]->logEntry(* logEntry);
      }
      if (res < 0)
      {
	err << "Restore: An restoring the data log. Exiting... res=" 
	    << res << endl;
	exitHandler(NDBT_FAILED);
      }
      logIter.validateFooter(); //not implemented
      for (i= 0; i < g_consumers.size(); i++)
	g_consumers[i]->endOfLogEntrys();
    }
    
    if(_restore_data)
    {
      for(i = 0; i<metaData.getNoOfTables(); i++)
      {
        const TableS* table = metaData[i];
        OutputStream *output = table_output[table->getLocalId()];
        if (!output)
          continue;
        for(Uint32 j= 0; j < g_consumers.size(); j++)
          if (!g_consumers[j]->finalize_table(*table))
          {
            err << "Restore: Failed to finalize restore table: %s. ";
            err << "Exiting... " << metaData[i]->getTableName() << endl;
            exitHandler(NDBT_FAILED);
          }
      }
    }
  }
  for(Uint32 j= 0; j < g_consumers.size(); j++) 
  {
    if (g_consumers[j]->has_temp_error())
    {
      clearConsumers();
      ndbout_c("\nRestore successful, but encountered temporary error, "
               "please look at configuration.");
    }               
  }
  
  clearConsumers();

  for(i = 0; i < metaData.getNoOfTables(); i++)
  {
    if (table_output[i] &&
        table_output[i] != ndbout.m_out)
    {
      my_fclose(((FileOutputStream *)table_output[i])->getFile(), MYF(MY_WME));
      delete table_output[i];
      table_output[i] = NULL;
    }
  }

  if (opt_verbose)
    return NDBT_ProgramExit(NDBT_OK);
  else
    return 0;
} // main

template class Vector<BackupConsumer*>;
template class Vector<OutputStream*>;
