/*=========================================================================

  Program:   Visualization Toolkit
  Module:    TestMySQLDatabase.cxx

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
/*-------------------------------------------------------------------------
  Copyright 2008 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
// .SECTION Thanks
// Thanks to Andrew Wilson and Philippe Pebay from Sandia National Laboratories
// for implementing this test.
//
// You should set VTK_MYSQL_TEST_URL to the address of a MySQL
// database that you can use for testing.  For example, if you have
// MySQL running on foo.mycompany.com, your test user is called
// 'vtktest' and the database is called 'elephant', the URL looks like
// 'mysql://vtktest@foo.mycompany.com/elephant'.
//
// We recommend creating a user and a 'vtktest' database, then giving
// the user in question rights *only* to that database.  The password
// 'vtktest' is hard-coded into this file for the moment until we
// decide whether it's a good idea to put any kind of password in
// CMake.

#include "DatabaseSchemaWith2Tables.h"
#include "vtkIOMySQLTestingCxxConfigure.h"
#include "vtkMySQLDatabase.h"
#include "vtkRowQueryToTable.h"
#include "vtkSQLDatabaseSchema.h"
#include "vtkSQLQuery.h"
#include "vtkStdString.h"
#include "vtkTable.h"
#include "vtkTimePointUtility.h"
#include "vtkVariant.h"
#include "vtkVariantArray.h"

#include <vector>

int TestMySQLDatabase(int, char** const)
{
  vtkMySQLDatabase* db =
    vtkMySQLDatabase::SafeDownCast(vtkSQLDatabase::CreateFromURL(VTK_MYSQL_TEST_URL));

  // Temp code to for linkage ...
  vtkMySQLDatabase* tmp = vtkMySQLDatabase::New();

  bool status = db->Open("vtktest");

  if (!status)
  {
    cerr << "Couldn't open database.\n";
    return 1;
  }

  vtkSQLQuery* query = db->GetQueryInstance();
  vtkStdString createQuery(
    "CREATE TABLE IF NOT EXISTS people (name TEXT, age INTEGER, weight FLOAT)");
  cout << createQuery << endl;
  query->SetQuery(createQuery.c_str());
  if (!query->Execute())
  {
    cerr << "Create query failed" << endl;
    return 1;
  }

  for (int i = 0; i < 40; ++i)
  {
    char insertQuery[200];
    snprintf(insertQuery, sizeof(insertQuery), "INSERT INTO people VALUES('John Doe %d', %d, %d)",
      i, i, 10 * i);
    cout << insertQuery << endl;
    query->SetQuery(insertQuery);
    if (!query->Execute())
    {
      cerr << "Insert query " << i << " failed" << endl;
      return 1;
    }
  }

  const char* queryText = "SELECT name, age, weight FROM people WHERE age <= 20";
  query->SetQuery(queryText);
  cerr << endl << "Running query: " << query->GetQuery() << endl;

  cerr << endl << "Using vtkSQLQuery directly to execute query:" << endl;
  if (!query->Execute())
  {
    cerr << "Query failed" << endl;
    return 1;
  }

  for (int col = 0; col < query->GetNumberOfFields(); ++col)
  {
    if (col > 0)
    {
      cerr << ", ";
    }
    cerr << query->GetFieldName(col);
  }
  cerr << endl;
  while (query->NextRow())
  {
    for (int field = 0; field < query->GetNumberOfFields(); ++field)
    {
      if (field > 0)
      {
        cerr << ", ";
      }
      cerr << query->DataValue(field).ToString().c_str();
    }
    cerr << endl;
  }

  cerr << endl << "Using vtkSQLQuery to execute query and retrieve by row:" << endl;
  if (!query->Execute())
  {
    cerr << "Query failed" << endl;
    return 1;
  }
  for (int col = 0; col < query->GetNumberOfFields(); ++col)
  {
    if (col > 0)
    {
      cerr << ", ";
    }
    cerr << query->GetFieldName(col);
  }
  cerr << endl;
  vtkVariantArray* va = vtkVariantArray::New();
  while (query->NextRow(va))
  {
    for (int field = 0; field < va->GetNumberOfValues(); ++field)
    {
      if (field > 0)
      {
        cerr << ", ";
      }
      cerr << va->GetValue(field).ToString().c_str();
    }
    cerr << endl;
  }
  va->Delete();

  cerr << endl << "Using vtkRowQueryToTable to execute query:" << endl;
  vtkRowQueryToTable* reader = vtkRowQueryToTable::New();
  reader->SetQuery(query);
  reader->Update();
  vtkTable* table = reader->GetOutput();
  for (vtkIdType col = 0; col < table->GetNumberOfColumns(); ++col)
  {
    table->GetColumn(col)->Print(cerr);
  }
  cerr << endl;
  for (vtkIdType row = 0; row < table->GetNumberOfRows(); ++row)
  {
    for (vtkIdType col = 0; col < table->GetNumberOfColumns(); ++col)
    {
      vtkVariant v = table->GetValue(row, col);
      cerr << "row " << row << ", col " << col << " - " << v.ToString() << " ( "
           << vtkImageScalarTypeNameMacro(v.GetType()) << " )" << endl;
    }
  }

  query->SetQuery("DROP TABLE people");
  if (!query->Execute())
  {
    cerr << "DROP TABLE people query failed" << endl;
    return 1;
  }

  reader->Delete();
  query->Delete();
  db->Delete();

  // ----------------------------------------------------------------------
  // Testing transformation of a schema into a MySQL database

  // 1. Create the schema
  DatabaseSchemaWith2Tables schema;

  // 2. Convert the schema into a MySQL database
  cerr << "@@ Converting the schema into a MySQL database...";

  db = vtkMySQLDatabase::SafeDownCast(vtkSQLDatabase::CreateFromURL(VTK_MYSQL_TEST_URL));
  status = db->Open("vtktest");

  if (!status)
  {
    cerr << "Couldn't open database.\n";
    return 1;
  }

  status = db->EffectSchema(schema.GetSchema());
  if (!status)
  {
    cerr << "Could not effect test schema.\n";
    return 1;
  }
  cerr << " done." << endl;

  // 3. Count tables of the newly created database
  cerr << "@@ Counting tables of the newly created database... ";

  query = db->GetQueryInstance();
  query->SetQuery("SHOW TABLES");
  if (!query->Execute())
  {
    cerr << "Query failed" << endl;
    return 1;
  }

  std::vector<vtkStdString> tables;
  while (query->NextRow())
  {
    tables.push_back(query->DataValue(0).ToString());
  }

  int numTbl = tables.size();

  if (numTbl != schema->GetNumberOfTables())
  {
    cerr << "Found an incorrect number of tables: " << numTbl
         << " != " << schema->GetNumberOfTables() << endl;
    return 1;
  }

  cerr << numTbl << " found.\n";

  // 4. Inspect these tables
  cerr << "@@ Inspecting these tables..."
       << "\n";

  vtkStdString queryStr;
  int tblHandle = schema.GetTableBHandle();

  for (tblHandle = 0; tblHandle < numTbl; ++tblHandle)
  {
    vtkStdString tblName(schema->GetTableNameFromHandle(tblHandle));
    cerr << "   Table: " << tblName << "\n";

    if (tblName != tables[tblHandle])
    {
      cerr << "Fetched an incorrect name: " << tables[tblHandle] << " != " << tblName << endl;
      return 1;
    }

    // 4.1 Check columns
    queryStr = "DESCRIBE ";
    queryStr += tblName;
    query->SetQuery(queryStr);
    if (!query->Execute())
    {
      cerr << "Query failed" << endl;
      return 1;
    }

    int numFields = query->GetNumberOfFields();
    int colHandle = 0;
    for (; query->NextRow(); ++colHandle)
    {
      for (int field = 0; field < numFields; ++field)
      {
        if (field)
        {
          cerr << ", ";
        }
        else // if ( field )
        {
          vtkStdString colName(schema->GetColumnNameFromHandle(tblHandle, colHandle));
          if (colName != query->DataValue(field).ToString())
          {
            cerr << "Found an incorrect column name: " << query->DataValue(field).ToString()
                 << " != " << colName << endl;
            return 1;
          }
          cerr << "     Column: ";
        }
        cerr << query->DataValue(field).ToString().c_str();
      }
      cerr << endl;
    }

    if (colHandle != schema->GetNumberOfColumnsInTable(tblHandle))
    {
      cerr << "Found an incorrect number of columns: " << colHandle
           << " != " << schema->GetNumberOfColumnsInTable(tblHandle) << endl;
      return 1;
    }

    // 4.2 Check indices
    queryStr = "SHOW INDEX FROM ";
    queryStr += tblName;
    query->SetQuery(queryStr);
    if (!query->Execute())
    {
      cerr << "Query failed" << endl;
      return 1;
    }

    numFields = query->GetNumberOfFields();
    int idxHandle = -1;
    while (query->NextRow())
    {
      int cnmHandle = atoi(query->DataValue(3).ToString()) - 1;
      if (!cnmHandle)
      {
        ++idxHandle;
      }

      vtkStdString colName(schema->GetIndexColumnNameFromHandle(tblHandle, idxHandle, cnmHandle));
      for (int field = 0; field < numFields; ++field)
      {
        if (field)
        {
          cerr << ", ";
        }
        else // if ( field )
        {
          cerr << "     Index: ";
        }
        cerr << query->DataValue(field).ToString().c_str();
      }
      cerr << endl;

      if (colName != query->DataValue(4).ToString())
      {
        cerr << "Fetched an incorrect column name: " << query->DataValue(4).ToString()
             << " != " << colName << endl;
        return 1;
      }
    }

    if (idxHandle + 1 != schema->GetNumberOfIndicesInTable(tblHandle))
    {
      cerr << "Found an incorrect number of indices: " << idxHandle + 1
           << " != " << schema->GetNumberOfIndicesInTable(tblHandle) << endl;
      return 1;
    }
  }

  // 5. Populate these tables using the trigger mechanism
  cerr << "@@ Populating table atable...";

  queryStr = "INSERT INTO atable (somename,somenmbr) VALUES ( 'Bas-Rhin', 67 )";
  query->SetQuery(queryStr);
  if (!query->Execute())
  {
    cerr << "Query failed" << endl;
    query->Delete();
    db->Delete();
    return 1;
  }

  queryStr = "INSERT INTO atable (somename,somenmbr) VALUES ( 'Hautes-Pyrenees', 65 )";
  query->SetQuery(queryStr);
  if (!query->Execute())
  {
    cerr << "Query failed" << endl;
    query->Delete();
    db->Delete();
    return 1;
  }

  queryStr = "INSERT INTO atable (somename,somenmbr) VALUES ( 'Vosges', 88 )";
  query->SetQuery(queryStr);
  if (!query->Execute())
  {
    cerr << "Query failed" << endl;
    query->Delete();
    db->Delete();
    return 1;
  }

  cerr << " done." << endl;

  // 6. Check that the trigger-dependent table has indeed been populated
  cerr << "@@ Checking trigger-dependent table btable...\n";

  queryStr = "SELECT somevalue FROM btable ORDER BY somevalue DESC";
  query->SetQuery(queryStr);
  if (!query->Execute())
  {
    cerr << "Query failed" << endl;
    query->Delete();
    db->Delete();
    return 1;
  }

  cerr << "   Entries in column somevalue of table btable, in descending order:\n";
  static const char* dpts[] = { "88", "67", "65" };
  int numDpt = 0;
  for (; query->NextRow(); ++numDpt)
  {
    if (query->DataValue(0).ToString() != dpts[numDpt])
    {
      cerr << "Found an incorrect value: " << query->DataValue(0).ToString()
           << " != " << dpts[numDpt] << endl;
      query->Delete();
      db->Delete();
      return 1;
    }
    cerr << "     " << query->DataValue(0).ToString() << "\n";
  }

  if (numDpt != 3)
  {
    cerr << "Found an incorrect number of entries: " << numDpt << " != " << 3 << endl;
    query->Delete();
    db->Delete();
    return 1;
  }

  cerr << " done." << endl;

  // 7. Test EscapeString.
  cerr << "@@ Escaping a naughty string...";

  queryStr = "INSERT INTO atable (somename,somenmbr) VALUES ( " +
    query->EscapeString(vtkStdString("Str\"ang'eS\ntring"), true) + ", 2 )";
  query->SetQuery(queryStr);
  if (!query->Execute())
  {
    cerr << "Query failed" << endl;
    query->Delete();
    db->Delete();
    return 1;
  }

  cerr << " done." << endl;

  // 8. Read back the escaped string to verify it worked.
  cerr << "@@ Reading it back... <";

  queryStr = "SELECT somename FROM atable WHERE somenmbr=2";
  query->SetQuery(queryStr);
  if (!query->Execute())
  {
    cerr << "Query failed" << endl;
    query->Delete();
    db->Delete();
    return 1;
  }

  if (!query->NextRow())
  {
    cerr << "Query returned no results" << endl;
    query->Delete();
    db->Delete();
    return 1;
  }

  cerr << query->DataValue(0).ToString().c_str() << "> ";
  cerr << " done." << endl;

  // 8. Drop tables
  cerr << "@@ Dropping these tables...";

  for (std::vector<vtkStdString>::iterator it = tables.begin(); it != tables.end(); ++it)
  {
    queryStr = "DROP TABLE ";
    queryStr += *it;
    query->SetQuery(queryStr);

    if (!query->Execute())
    {
      cerr << "Query failed" << endl;
      return 1;
    }
  }

  cerr << " done." << endl;

  // ----------------------------------------------------------------------
  // Testing time values in database
  cerr << "@@ Testing time values" << endl;
  query->SetQuery("create table if not exists time (_date DATE, _time TIME, _timestamp TIMESTAMP, "
                  "_datetime DATETIME, _year YEAR);");
  cerr << query->GetQuery() << endl;
  if (!query->Execute())
  {
    cerr << "Time table creation failed" << endl;
    return 1;
  }
  query->SetQuery("insert into time values ('2008-01-01', '01:23:45', '2008-01-01 01:23:45', "
                  "'2008-01-01 01:23:45', 2008);");
  cerr << query->GetQuery() << endl;
  if (!query->Execute())
  {
    cerr << "Time table insert failed" << endl;
    return 1;
  }
  query->SetQuery("select * from time");
  cerr << query->GetQuery() << endl;
  if (!query->Execute())
  {
    cerr << "Time table select failed" << endl;
    return 1;
  }
  query->NextRow();
  vtkTypeUInt64 date = vtkTimePointUtility::ISO8601ToTimePoint(query->DataValue(0).ToString());
  vtkTypeUInt64 time = vtkTimePointUtility::ISO8601ToTimePoint(query->DataValue(1).ToString());
  vtkTypeUInt64 timestamp = vtkTimePointUtility::ISO8601ToTimePoint(query->DataValue(2).ToString());
  vtkTypeUInt64 datetime = vtkTimePointUtility::ISO8601ToTimePoint(query->DataValue(3).ToString());
  int month, day, year, hour, minute, second, msec;
  vtkTimePointUtility::GetDate(date, year, month, day);
  if (year != 2008 || month != 1 || day != 1)
  {
    cerr << "Date read incorrectly" << endl;
    return 1;
  }
  vtkTimePointUtility::GetTime(time, hour, minute, second, msec);
  if (hour != 1 || minute != 23 || second != 45)
  {
    cerr << "Time read incorrectly" << endl;
    return 1;
  }
  vtkTimePointUtility::GetDateTime(timestamp, year, month, day, hour, minute, second, msec);
  if (year != 2008 || month != 1 || day != 1 || hour != 1 || minute != 23 || second != 45)
  {
    cerr << "Timestamp read incorrectly" << endl;
    return 1;
  }
  vtkTimePointUtility::GetDateTime(datetime, year, month, day, hour, minute, second, msec);
  if (year != 2008 || month != 1 || day != 1 || hour != 1 || minute != 23 || second != 45)
  {
    cerr << "Datetime read incorrectly" << endl;
    return 1;
  }
  year = query->DataValue(4).ToInt();
  if (year != 2008)
  {
    cerr << "Year read incorrectly" << endl;
    return 1;
  }
  query->SetQuery("drop table time;");
  cerr << query->GetQuery() << endl;
  if (!query->Execute())
  {
    cerr << "Time table drop failed" << endl;
    return 1;
  }

  // Clean up
  db->Delete();
  query->Delete();

  return 0;
}