/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

using System;
using System.Text;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Collections;
using System.Threading;
using System.Diagnostics;

namespace TDengineDriver
{
    class TDengineTest
    {
        //connect parameters
        private string host = "127.0.0.1";
        private string configDir = "C:/TDengine/cfg";
        private string user = "root";
        private string password = "taosdata";
        private short port = 0;

        //sql parameters
        private string dbName = "db";
        private string stablePrefix = "st";
        private string tablePrefix = "t";

        private bool isInsertOnly = false;
        private string query = "NONE";
        private short queryMode = 1;

        private long recordsPerTable = 1;
        private int recordsPerRequest = 1;
        private int colsPerRecord = 3;
        private long batchRows = 1000;
        private long numOfTables = 1;
        private short replica = 1;

        private IntPtr conn = IntPtr.Zero;
        //        private long rowsInserted = 0;
        private bool useStable = false;
        private short methodOfDelete = 0;
        private long numOfThreads = 1;
        private short rateOfOutorder = 10;
        private bool order = true;
        private bool skipReadKey = false;
        private bool verbose = false;
        private bool debug = false;


        static void HelpPrint(string arg, string desc)
        {
            string indent = "        ";
            Console.WriteLine("{0}{1}", indent, arg.PadRight(25) + desc);
        }

        static void PrintHelp(String[] argv)
        {
            for (int i = 0; i < argv.Length; ++i)
            {
                if ("--help" == argv[i])
                {
                    Console.WriteLine("Usage: mono taosdemo.exe [OPTION...]");
                    Console.WriteLine("");
                    HelpPrint("--help", "Show usage.");
                    Console.WriteLine("");

                    HelpPrint("-h <hostname>", "host, The host to connect to TDengine. Default is localhost.");
                    HelpPrint("-p <port>", "port, The TCP/IP port number to use for the connection. Default is 0.");
                    HelpPrint("-u <username>", "user, The user name to use when connecting to the server. Default is 'root'.");
                    HelpPrint("-P <password>", "password, The password to use when connecting to the server. Default is 'taosdata'.");
                    HelpPrint("-d <dbname>", "database, Destination database. Default is 'test'.");
                    HelpPrint("-a <replications>", "replica, Set the replica parameters of the database, Default 1, min: 1, max: 5.");
                    HelpPrint("-m <table prefix>", "table_prefix, Table prefix name. Default is 't'.");
                    HelpPrint("-M", "stable, Use super table.");
                    HelpPrint("-s <stable prefix>", "stable_prefix, STable prefix name. Default is 'st'");
                    HelpPrint("-Q <DEFAULT | command>", "query, Execute query command. set 'DEFAULT' means select * from each table");
                    /* NOT SUPPORT SO FAR
                    HelpPrint("-o", "outputfile, Direct output to the named file. Default is './output.txt'.");
                    HelpPrint("-q", "query_mode, Query mode--0: SYNC, 1: ASYNC. Default is SYNC.");
                    HelpPrint("-b", "type_of_cols, data_type of columns: 'INT', 'TINYINT', 'SMALLINT', 'BIGINT', 'FLOAT', 'DOUBLE', 'BINARY'. Default is 'INT'.");
                    HelpPrint("-w", "length_of_binary, The length of data_type 'BINARY'. Only applicable when type of cols is 'BINARY'. Default is 8");
                    HelpPrint("-l", "num_of_cols_per_record, The number of columns per record. Default is 3.");
                    */
                    HelpPrint("-T <number>", "num_of_threads, The number of threads. Default is 10.");
                    HelpPrint("-r <number>", "num_of_records_per_req, The number of records per request. Default is 1000.");
                    HelpPrint("-t <number>", "num_of_tables, The number of tables. Default is 1.");
                    HelpPrint("-n <number>", "num_of_records_per_table, The number of records per table. Default is 1.");
                    HelpPrint("-c <path>", "config_directory, Configuration directory. Default is '/etc/taos/'.");
                    HelpPrint("-x", "flag, Insert only flag.");
                    HelpPrint("-O", "order, Insert mode--0: In order, 1: Out of order. Default is in order.");
                    HelpPrint("-R <number>", "rate, Out of order data's rate--if order=1 Default 10, min: 0, max: 50.");
                    HelpPrint("-D <number>", "Delete data methods 0: don't delete, 1: delete by table, 2: delete by stable, 3: delete by database.");
                    HelpPrint("-v", "Print verbose output");
                    HelpPrint("-g", "Print debug output");
                    HelpPrint("-y", "Skip read key for continous test, default is not skip");

                    System.Environment.Exit(0);
                }
            }
        }

        public void ReadArgument(String[] argv)
        {
            host = this.GetArgumentAsString(argv, "-h", "127.0.0.1");
            port = (short)this.GetArgumentAsLong(argv, "-p", 0, 65535, 6030);
            user = this.GetArgumentAsString(argv, "-u", "root");
            password = this.GetArgumentAsString(argv, "-P", "taosdata");
            dbName = this.GetArgumentAsString(argv, "-d", "db");
            stablePrefix = this.GetArgumentAsString(argv, "-s", "st");
            tablePrefix = this.GetArgumentAsString(argv, "-m", "t");
            isInsertOnly = this.GetArgumentAsFlag(argv, "-x", true);
            query = this.GetArgumentAsString(argv, "-Q", "NONE");
            queryMode = (short)this.GetArgumentAsLong(argv, "-q", 0, 1, 0);
            numOfTables = this.GetArgumentAsLong(argv, "-t", 1, 1000000000, 1);
            batchRows = this.GetArgumentAsLong(argv, "-r", 1, 10000, 1000);
            recordsPerTable = this.GetArgumentAsLong(argv, "-n", 1, 100000000000, 1);
            recordsPerRequest = (int)this.GetArgumentAsLong(argv, "-r", 1, 10000, 1);
            colsPerRecord = (int)this.GetArgumentAsLong(argv, "-l", 1, 1024, 3);
            configDir = this.GetArgumentAsString(argv, "-c", "C:/TDengine/cfg");
            useStable = this.GetArgumentAsFlag(argv, "-M", true);

            replica = (short)this.GetArgumentAsLong(argv, "-a", 1, 5, 1);
            methodOfDelete = (short)this.GetArgumentAsLong(argv, "-D", 0, 3, 0);
            numOfThreads = (short)this.GetArgumentAsLong(argv, "-T", 1, 10000, 1);
            order = this.GetArgumentAsFlag(argv, "-O", false);
            rateOfOutorder = (short)this.GetArgumentAsLong(argv, "-R", 0, 50, 10);

            skipReadKey = this.GetArgumentAsFlag(argv, "-y", true);
            verbose = this.GetArgumentAsFlag(argv, "-v", true);
            debug = this.GetArgumentAsFlag(argv, "-g", true);

            VerbosePrint("###################################################################\n");
            VerbosePrintFormat("# Server IP:                         {0}\n", host);
            VerbosePrintFormat("# User:                              {0}\n", user);
            VerbosePrintFormat("# Password:                          {0}\n", password);
            VerbosePrintFormat("# Number of Columns per record:      {0}\n", colsPerRecord);
            VerbosePrintFormat("# Number of Threads:                 {0}\n", numOfThreads);
            VerbosePrintFormat("# Number of Tables:                  {0}\n", numOfTables);
            VerbosePrintFormat("# Number of records per Table:       {0}\n", recordsPerTable);
            VerbosePrintFormat("# Records/Request:                   {0}\n", recordsPerRequest);
            VerbosePrintFormat("# Database name:                     {0}\n", dbName);
            VerbosePrintFormat("# Replica:                           {0}\n", replica);
            VerbosePrintFormat("# Use STable:                        {0}\n", useStable);
            VerbosePrintFormat("# Table prefix:                      {0}\n", tablePrefix);
            if (useStable == true)
            {
                VerbosePrintFormat("# STable prefix:                     {0}\n", stablePrefix);
            }
            VerbosePrintFormat("# Data order:                        {0}\n", order);
            VerbosePrintFormat("# Data out of order rate:            {0}\n", rateOfOutorder);
            VerbosePrintFormat("# Delete method:                     {0}\n", methodOfDelete);
            VerbosePrintFormat("# Query command:                     {0}\n", query);
            VerbosePrintFormat("# Query Mode:                        {0}\n", queryMode);
            VerbosePrintFormat("# Insert Only:                       {0}\n", isInsertOnly);
            VerbosePrintFormat("# Verbose output                     {0}\n", verbose);
            VerbosePrintFormat("# Test time:                         {0}\n", DateTime.Now.ToString("h:mm:ss tt"));

            VerbosePrint("###################################################################\n");

            if (skipReadKey == false)
            {
                Console.Write("Press any key to continue..\n");
                Console.ReadKey();
            }
        }

        public bool GetArgumentAsFlag(String[] argv, String argName, bool defaultValue)
        {
            int argc = argv.Length;
            for (int i = 0; i < argc; ++i)
            {
                if (argName == argv[i])
                {
                    return defaultValue;
                }
            }
            return !defaultValue;
        }

        public long GetArgumentAsLong(String[] argv, String argName, int minVal, long maxVal, int defaultValue)
        {
            int argc = argv.Length;
            for (int i = 0; i < argc; ++i)
            {
                if (argName != argv[i])
                {
                    continue;
                }
                if (i < argc - 1)
                {
                    String tmp = argv[i + 1];
                    if (tmp[0] == '-')
                    {
                        Console.WriteLine("option {0:G} requires an argument", argName);
                        ExitProgram(1);
                    }

                    long tmpVal = Convert.ToInt64(tmp);
                    if (tmpVal < minVal || tmpVal > maxVal)
                    {
                        Console.WriteLine("option {0:G} value should in range [{1:G}, {2:G}]", argName, minVal, maxVal);
                        ExitProgram(1);
                    }

                    return tmpVal;
                }
            }

            return defaultValue;
        }

        public String GetArgumentAsString(String[] argv, String argName, String defaultValue)
        {
            int argc = argv.Length;
            for (int i = 0; i < argc; ++i)
            {
                if (argName != argv[i])
                {
                    continue;
                }
                if (i < argc - 1)
                {
                    String tmp = argv[i + 1];
                    if (tmp[0] == '-')
                    {
                        Console.WriteLine("option {0:G} requires an argument", argName);
                        ExitProgram(1);
                    }
                    return tmp;
                }
            }

            return defaultValue;
        }

        static void CleanAndExitProgram(int ret)
        {
            TDengine.Cleanup();
            System.Environment.Exit(ret);
        }

        static void ExitProgram(int ret)
        {
            System.Environment.Exit(ret);
        }

        private void VerbosePrintFormat(string format, params object[] parameters)
        {
            if (verbose == true)
            {
                Console.Write(format, parameters);
            }
        }

        private void VerbosePrint(string str)
        {
            if (verbose == true)
            {
                Console.Write(str);
            }
        }

        private void DebugPrintFormat(string format, params object[] parameters)
        {
            if (debug == true)
            {
                Console.Write(format, parameters);
            }
        }

        private void DebugPrint(string str)
        {
            if (debug == true)
            {
                Console.Write(str);
            }
        }

        public void InitTDengine()
        {
            TDengine.Options((int)TDengineInitOption.TDDB_OPTION_CONFIGDIR, this.configDir);
            TDengine.Options((int)TDengineInitOption.TDDB_OPTION_SHELL_ACTIVITY_TIMER, "60");
            TDengine.Init();
            VerbosePrint("TDengine Initialization finished\n");
        }

        public void ConnectTDengine()
        {
            string db = "";
            VerbosePrintFormat("host:{0} user:{1}, pass:{2}; db:{3}, port:{4}\n",
                    this.host, this.user, this.password, db, this.port);
            this.conn = TDengine.Connect(this.host, this.user, this.password, db, this.port);
            if (this.conn == IntPtr.Zero)
            {
                Console.WriteLine("Connect to TDengine failed");
                CleanAndExitProgram(1);
            }
            else
            {
                VerbosePrint("Connect to TDengine success\n");
            }
        }

        public void CreateTablesByThreads()
        {
            Thread[] threadArr = new Thread[numOfThreads];

            long quotition = numOfTables / numOfThreads;
            if (quotition < 1)
            {
                numOfThreads = numOfTables;
                quotition = 1;
            }

            long remainder = 0;
            if (numOfThreads != 0)
            {
                remainder = numOfTables % numOfThreads;
            }

            long last = 0;

            for (int i = 0; i < numOfThreads; i++)
            {
                CreateTableThread createTableThread = new CreateTableThread();
                createTableThread.id = i;
                createTableThread.verbose = verbose;
                createTableThread.debug = debug;
                createTableThread.dbName = this.dbName;
                createTableThread.tablePrefix = this.tablePrefix;
                createTableThread.useStable = useStable;
                if (useStable)
                {
                    createTableThread.stablePrefix = stablePrefix;
                }
                createTableThread.conn = conn;

                createTableThread.start = last;
                if (i < remainder)
                {
                    createTableThread.end = last + quotition;
                }
                else
                {
                    createTableThread.end = last + quotition - 1;
                }
                last = createTableThread.end + 1;

                threadArr[i] = new Thread(createTableThread.ThreadMain);
                threadArr[i].Start();
                threadArr[i].Join();
            }
        }

        public void dropDatabase()
        {
            StringBuilder sql = new StringBuilder();
            sql.Append("DROP DATABASE IF EXISTS ").Append(this.dbName);
            IntPtr res = TDengine.Query(this.conn, sql.ToString());
            if ((res == IntPtr.Zero) || (TDengine.ErrorNo(res) != 0))
            {
                Console.Write(sql.ToString() + " failure, ");
                if (res != IntPtr.Zero) {
                  Console.Write("reason: " + TDengine.Error(res));
                }
                Console.WriteLine("");
                CleanAndExitProgram(1);
            }
            else
            {
                VerbosePrint(sql.ToString() + " success\n");
            }
        }

        public void CreateDb()
        {
            StringBuilder sql = new StringBuilder();
            sql.Append("CREATE DATABASE IF NOT EXISTS ").Append(this.dbName).Append(" replica ").Append(this.replica).Append(" keep 36500");
            IntPtr res = TDengine.Query(this.conn, sql.ToString());
            if ((res == IntPtr.Zero) || (TDengine.ErrorNo(res) != 0))
            {
                Console.Write(sql.ToString() + " failure, ");
                if (res != IntPtr.Zero) {
                  Console.Write("reason: " + TDengine.Error(res));
                }
                Console.WriteLine("");
                CleanAndExitProgram(1);
            }
            else
            {
                VerbosePrint(sql.ToString() + " success\n");
            }
            TDengine.FreeResult(res);
        }

        public void CreateStable()
        {
            StringBuilder sql = new StringBuilder();

            sql.Clear();
            sql.Append("CREATE TABLE IF NOT EXISTS ").
                Append(this.dbName).Append(".").Append(this.stablePrefix).
                Append("(ts timestamp, v1 bool, v2 tinyint, v3 smallint, v4 int, v5 bigint, v6 float, v7 double, v8 binary(10), v9 nchar(10), v10 tinyint unsigned, v11 smallint unsigned, v12 int unsigned, v13 bigint unsigned) tags(t1 int)");
            IntPtr res = TDengine.Query(this.conn, sql.ToString());
            if ((res == IntPtr.Zero) || (TDengine.ErrorNo(res) != 0))
            {
                Console.Write(sql.ToString() + " failure, ");
                if (res != IntPtr.Zero) {
                  Console.Write("reason: " + TDengine.Error(res));
                }
                Console.WriteLine("");
                CleanAndExitProgram(1);
            }
            else
            {
                VerbosePrint(sql.ToString() + " success\n");
            }
            TDengine.FreeResult(res);
        }

        public void InsertByThreads()
        {
            Thread[] threadArr = new Thread[numOfThreads];

            long quotition = numOfTables / numOfThreads;
            if (quotition < 1)
            {
                numOfThreads = numOfTables;
                quotition = 1;
            }

            long remainder = 0;
            if (numOfThreads != 0)
            {
                remainder = numOfTables % numOfThreads;
            }

            long last = 0;

            for (int i = 0; i < numOfThreads; i++)
            {
                InsertDataThread insertThread = new InsertDataThread();
                insertThread.id = i;
                insertThread.recordsPerTable = recordsPerTable;
                insertThread.batchRows = batchRows;
                insertThread.numOfTables = numOfTables;
                insertThread.verbose = verbose;
                insertThread.debug = debug;
                insertThread.dbName = this.dbName;
                insertThread.tablePrefix = this.tablePrefix;
                insertThread.order = this.order;
                insertThread.rateOfOutorder = this.rateOfOutorder;
                if (useStable)
                {
                    insertThread.stablePrefix = stablePrefix;
                }
                insertThread.conn = conn;

                insertThread.start = last;
                if (i < remainder)
                {
                    insertThread.end = last + quotition;
                }
                else
                {
                    insertThread.end = last + quotition - 1;
                }
                last = insertThread.end + 1;

                threadArr[i] = new Thread(insertThread.ThreadMain);
                threadArr[i].Start();
                threadArr[i].Join();
            }
        }

        public void ExecuteQuery()
        {
            long queryRows = 0;

            for (int i = 0; i < this.numOfTables; ++i)
            {
                string sql;

                if (query == "DEFAULT")
                {
                    sql = "select * from " + this.dbName + "." + tablePrefix + i;
                }
                else
                {
                    sql = query;
                }
                DebugPrintFormat("query: {0}, sql:{1}\n", query, sql);

                IntPtr res = TDengine.Query(conn, sql);
                DebugPrintFormat("res: {0}\n", res);
                if ((res == IntPtr.Zero) || (TDengine.ErrorNo(res) != 0))
                {
                    Console.Write(sql.ToString() + " failure, ");
                    if (res != IntPtr.Zero) {
                      Console.Write("reason: " + TDengine.Error(res));
                    }
                    Console.WriteLine("");
                    CleanAndExitProgram(1);
                }

                int fieldCount = TDengine.FieldCount(res);
                DebugPrint("field count: " + fieldCount + "\n");

                List<TDengineMeta> metas = TDengine.FetchFields(res);
                for (int j = 0; j < metas.Count; j++)
                {
                    TDengineMeta meta = (TDengineMeta)metas[j];
                    DebugPrint("index:" + j + ", type:" + meta.type + ", typename:" + meta.TypeName() + ", name:" + meta.name + ", size:" + meta.size + "\n");
                }

                IntPtr rowdata;
                StringBuilder builder = new StringBuilder();

                while ((rowdata = TDengine.FetchRows(res)) != IntPtr.Zero)
                {
                    queryRows++;
                    for (int fields = 0; fields < fieldCount; ++fields)
                    {
                        TDengineMeta meta = metas[fields];
                        int offset = IntPtr.Size * fields;
                        IntPtr data = Marshal.ReadIntPtr(rowdata, offset);

                        builder.Append(" | ");

                        if (data == IntPtr.Zero)
                        {
                            builder.Append("NULL");
                            continue;
                        }

                        switch ((TDengineDataType)meta.type)
                        {
                            case TDengineDataType.TSDB_DATA_TYPE_BOOL:
                                bool v1 = Marshal.ReadByte(data) == 0 ? false : true;
                                builder.Append(v1);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_TINYINT:
                                sbyte v2 = (sbyte)Marshal.ReadByte(data);
                                builder.Append(v2);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_SMALLINT:
                                short v3 = Marshal.ReadInt16(data);
                                builder.Append(v3);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_INT:
                                int v4 = Marshal.ReadInt32(data);
                                builder.Append(v4);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_BIGINT:
                                long v5 = Marshal.ReadInt64(data);
                                builder.Append(v5);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_FLOAT:
                                float v6 = (float)Marshal.PtrToStructure(data, typeof(float));
                                builder.Append(v6);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_DOUBLE:
                                double v7 = (double)Marshal.PtrToStructure(data, typeof(double));
                                builder.Append(v7);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_BINARY:
                                string v8 = Marshal.PtrToStringAnsi(data);
                                builder.Append(v8);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_TIMESTAMP:
                                long v9 = Marshal.ReadInt64(data);
                                builder.Append(v9);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_NCHAR:
                                string v10 = Marshal.PtrToStringAnsi(data);
                                builder.Append(v10);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_UTINYINT:
                                byte v11 = Marshal.ReadByte(data);
                                builder.Append(v11);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_USMALLINT:
                                ushort v12 = (ushort)Marshal.ReadInt16(data);
                                builder.Append(v12);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_UINT:
                                uint v13 = (uint)Marshal.ReadInt32(data);
                                builder.Append(v13);
                                break;
                            case TDengineDataType.TSDB_DATA_TYPE_UBIGINT:
                                ulong v14 = (ulong)Marshal.ReadInt64(data);
                                builder.Append(v14);
                                break;
                        }
                    }
                    builder.Append(" | ");

                    VerbosePrint(builder.ToString() + "\n");
                    builder.Clear();
                }

                if (TDengine.ErrorNo(res) != 0)
                {
                    Console.Write("Query is not complete, Error {0:G}",
                            TDengine.ErrorNo(res), TDengine.Error(res));
                }

                TDengine.FreeResult(res);
            }
        }

        public void CloseConnection()
        {
            if (this.conn != IntPtr.Zero)
            {
                TDengine.Close(this.conn);
            }
        }

        // Main entry
        static void Main(string[] args)
        {
            PrintHelp(args);

            TDengineTest tester = new TDengineTest();
            tester.ReadArgument(args);

            tester.InitTDengine();
            tester.ConnectTDengine();

            if (tester.isInsertOnly == false)
            {
                tester.dropDatabase();
                tester.CreateDb();


                if (tester.useStable == true)
                {
                    tester.CreateStable();
                }

                tester.CreateTablesByThreads();
            }

            Stopwatch watch = Stopwatch.StartNew();
            tester.InsertByThreads();
            watch.Stop();
            double elapsedMs = watch.Elapsed.TotalMilliseconds;

            Console.WriteLine("C# taosdemo: Spent {0} seconds to insert {1} records with {2} record(s) per request: {3} records/second",
                    elapsedMs / 1000,
                tester.recordsPerTable * tester.numOfTables,
                tester.batchRows,
                (tester.recordsPerTable * tester.numOfTables * 1000) / elapsedMs);

            tester.DebugPrintFormat("query command:{0}\n", tester.query);
            if (tester.query != "NONE")
            {
                watch = Stopwatch.StartNew();
                tester.ExecuteQuery();
                watch.Stop();
                elapsedMs = watch.Elapsed.TotalMilliseconds;
                Console.WriteLine("C# taosdemo: Spent {0} seconds to query {1} records.\n",
                        elapsedMs / 1000,
                        tester.recordsPerTable * tester.numOfTables
                        );
            }
            tester.CloseConnection();

            Console.WriteLine("End.");
            CleanAndExitProgram(0);
        }

        public class InsertDataThread
        {
            public long id { set; get; }
            public long start { set; get; }
            public long end { set; get; }
            public string dbName { set; get; }
            public IntPtr conn { set; get; }
            public string tablePrefix { set; get; }
            public string stablePrefix { set; get; }
            public long recordsPerTable { set; get; }
            public long batchRows { set; get; }
            public long numOfTables { set; get; }
            public bool verbose { set; get; }
            public bool debug { set; get; }
            public bool order { set; get; }
            public short rateOfOutorder { set; get; }

            private void VerbosePrintFormat(string format, params object[] parameters)
            {
                if (verbose == true)
                {
                    Console.Write(format, parameters);
                }
            }

            private void VerbosePrint(string str)
            {
                if (verbose == true)
                {
                    Console.Write(str);
                }
            }

            private void DebugPrintFormat(string format, params object[] parameters)
            {
                if (debug == true)
                {
                    Console.Write(format, parameters);
                }
            }

            private void DebugPrint(string str)
            {
                if (debug == true)
                {
                    Console.Write(str);
                }
            }

            public void ThreadMain()
            {
                VerbosePrintFormat("InsertDataThread {0} from {1} to {2}\n", id, start, end);
                StringBuilder sql = new StringBuilder();

                DateTime now = DateTime.Now;
                int h = now.Hour;
                int m = now.Minute;
                int s = now.Second;

                long baseTimestamp = -16094340000;   // 1969-06-29 01:21:00
                VerbosePrintFormat("beginTime is {0} + {1}h:{2}m:{3}s\n", baseTimestamp, h, m, s);
                long beginTimestamp = baseTimestamp + ((h * 60 + m) * 60 + s) * 1000;
                Random random = new Random();

                long rowsInserted = 0;

                long i = 0;
                while (i < recordsPerTable)
                {
                    for (long table = start; table <= end; ++table)
                    {
                        long inserted = i;

                        sql.Clear();
                        sql.Append("INSERT INTO ").
                            Append(this.dbName).Append(".").Append(this.tablePrefix).Append(table).
                            Append(" VALUES");
                        if (recordsPerTable < batchRows)
                        {
                            batchRows = recordsPerTable;
                        }
                        for (int batch = 0; batch < batchRows; ++batch)
                        {
                            long writeTimeStamp = beginTimestamp + i + batch;
                            int rnd = 100;
                            if (this.order == false)
                            {
                                rnd = random.Next(1, 100);
                                if (rnd <= this.rateOfOutorder)
                                {
                                    writeTimeStamp = writeTimeStamp + rnd * 10000;
                                    DebugPrint("### ");
                                }
                                DebugPrintFormat("order:{0} rnd:{1} timestamp:{2}\n", this.order, rnd, writeTimeStamp);
                            }
                            else
                            {
                                DebugPrintFormat("order:{0} timestamp:{1}\n", this.order, writeTimeStamp);
                            }

                            sql.Append("(")
                                .Append(writeTimeStamp)
                                .Append(", 1, -2, -3,")
                                .Append(i + batch - 127)
                                .Append(", -5, -6, -7, 'abc', 'def', 254, 65534,")
                                .Append(4294967294 - (uint)i - (uint)batch)
                                .Append(",")
                                .Append(18446744073709551614 - (ulong)i - (ulong)batch)
                                .Append(")");

                        }
                        VerbosePrint(sql.ToString() + "\n");
                        IntPtr res = TDengine.Query(this.conn, sql.ToString());
                        if ((res == IntPtr.Zero) || (TDengine.ErrorNo(res) != 0))
                        {
                            Console.Write(sql.ToString() + " failure, ");
                            if (res != IntPtr.Zero) {
                              Console.Write("reason: " + TDengine.Error(res));
                            }
                            Console.WriteLine("");
                        }

                        inserted += this.batchRows;

                        int affectRows = TDengine.AffectRows(res);
                        rowsInserted += affectRows;

                        TDengine.FreeResult(res);
                        if (table == end)
                        {
                            i = inserted;
                        }
                    }
                }

            }
        }

        public class CreateTableThread
        {
            public long id { set; get; }
            public long start { set; get; }
            public long end { set; get; }
            public string dbName { set; get; }
            public IntPtr conn { set; get; }
            public string tablePrefix { set; get; }
            public string stablePrefix { set; get; }
            public bool verbose { set; get; }
            public bool debug { set; get; }
            public bool useStable { set; get; }

            private void VerbosePrintFormat(string format, params object[] parameters)
            {
                if (verbose == true)
                {
                    Console.Write(format, parameters);
                }
            }

            private void VerbosePrint(string str)
            {
                if (verbose == true)
                {
                    Console.Write(str);
                }
            }

            private void DebugPrintFormat(string format, params object[] parameters)
            {
                if (debug == true)
                {
                    Console.Write(format, parameters);
                }
            }

            public void ThreadMain()
            {
                VerbosePrintFormat("CreateTable {0} from {1} to {2}\n", id, start, end);

                StringBuilder sql = new StringBuilder();

                for (long tableId = start; tableId <= end; tableId++)
                {
                    sql.Clear();
                    sql = sql.Append("CREATE TABLE IF NOT EXISTS ").
                        Append(this.dbName).Append(".").Append(this.tablePrefix).Append(tableId);
                    if (useStable == true)
                    {
                        sql = sql.Append(" USING ").Append(this.dbName).Append(".").Append(this.stablePrefix).
                            Append(" TAGS(").Append(tableId).Append(")");
                    }
                    else
                    {
                        sql = sql.Append("(ts timestamp, v1 bool, v2 tinyint, v3 smallint, v4 int, v5 bigint, v6 float, v7 double, v8 binary(10), v9 nchar(10), v10 tinyint unsigned, v11 smallint unsigned, v12 int unsigned, v13 bigint unsigned)");
                    }
                    IntPtr res = TDengine.Query(this.conn, sql.ToString());
                    if ((res == IntPtr.Zero) || (TDengine.ErrorNo(res) != 0))
                    {
                        Console.Write(sql.ToString() + " failure, ");
                        if (res != IntPtr.Zero) {
                          Console.Write("reason: " + TDengine.Error(res));
                        }
                        Console.WriteLine("");
                        CleanAndExitProgram(1);
                    }
                    else
                    {
                        VerbosePrint(sql.ToString() + " success\n");
                    }
                    TDengine.FreeResult(res);
                }

            }
        }
    }
}