using HealthMonitor.Model.Config;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TDengineDriver;
using TDengineDriver.Impl;

namespace HealthMonitor.Service.Biz.db
{
    public class TDengineService
    {

        private readonly ILogger<TDengineService> _logger;
        private readonly TDengineServiceConfig _configTDengineService;
        public TDengineService(ILogger<TDengineService> logger, IOptions<TDengineServiceConfig> configTDengineService) 
        {
            _logger = logger;
            _configTDengineService = configTDengineService.Value;
        }
        public IntPtr Connection() 
        {

            string host = _configTDengineService.Host;
            string user = _configTDengineService.UserName;
            string db = _configTDengineService.DB;
            short port = _configTDengineService.Port;
            string password = _configTDengineService.Password;
            IntPtr conn = TDengine.Connect(host, user, password, db, port);

            //string host = "172.16.255.180";
            //short port = 6030;
            //string user = "root";
            //string password = "taosdata";
            //string db = "health_monitor";

            //IntPtr conn = TDengine.Connect(host, user, password, db, port);
            // Check if get connection success
            if (conn == IntPtr.Zero)
            {
                Console.WriteLine("Connect to TDengine failed");
            }
            else
            {
                Console.WriteLine("Connect to TDengine success");
            }
            return conn;
        }
        public void ExecuteSQL(IntPtr conn, string sql)
        {
            IntPtr res = TDengine.Query(conn, sql);
            // Check if query success
            if ((res == IntPtr.Zero) || (TDengine.ErrorNo(res) != 0))
            {
                Console.Write(sql + " failure, ");
                // Get error message while Res is a not null pointer.
                if (res != IntPtr.Zero)
                {
                    Console.Write("reason:" + TDengine.Error(res));
                }
            }
            else
            {
                Console.Write(sql + " success, {0} rows affected", TDengine.AffectRows(res));
                //... do something with res ...

                // Important: need to free result to avoid memory leak.
                TDengine.FreeResult(res);
            }
        }

        public void ExecuteQuerySQL(IntPtr conn, string sql)
        {
            IntPtr res = TDengine.Query(conn, sql);
            // Check if query success
            if ((res == IntPtr.Zero) || (TDengine.ErrorNo(res) != 0))
            {
                Console.Write(sql + " failure, ");
                // Get error message while Res is a not null pointer.
                if (res != IntPtr.Zero)
                {
                    Console.Write("reason:" + TDengine.Error(res));
                }
            }
            else
            {
                Console.Write(sql + " success, {0} rows affected", TDengine.AffectRows(res));
                //... do something with res ...

                List<TDengineDriver.TDengineMeta> resMeta = LibTaos.GetMeta(res);
                List<Object> resData = LibTaos.GetData(res);

                foreach (var meta in resMeta)
                {
                    Console.Write($"\t|{meta.name} {meta.TypeName()} ({meta.size})\t|");
                }

                for (int i = 0; i < resData.Count; i++)
                {
                    Console.Write($"|{resData[i].ToString()} \t");
                    //Console.WriteLine("{0},{1},{2}", i, resMeta.Count, (i) % resMeta.Count);
                    if (((i + 1) % resMeta.Count == 0))
                    {
                        Console.WriteLine("");
                    }
                }

                // Important: need to free result to avoid memory leak.
                TDengine.FreeResult(res);
            }
        }


        public void CheckRes(IntPtr conn, IntPtr res, String errorMsg)
        {
            if (TDengine.ErrorNo(res) != 0)
            {
                throw new Exception($"{errorMsg} since: {TDengine.Error(res)}");
            }
        }


        public void ExecuteInsertSQL(IntPtr conn, string sql)
        {
            try
            {
                //sql = "INSERT INTO d1001 USING meters TAGS('California.SanFrancisco', 2) VALUES ('2018-10-03 14:38:05.000', 10.30000, 219, 0.31000) ('2018-10-03 14:38:15.000', 12.60000, 218, 0.33000) ('2018-10-03 14:38:16.800', 12.30000, 221, 0.31000) " +
                //               "d1002 USING power.meters TAGS('California.SanFrancisco', 3) VALUES('2018-10-03 14:38:16.650', 10.30000, 218, 0.25000) " +
                //               "d1003 USING power.meters TAGS('California.LosAngeles', 2) VALUES('2018-10-03 14:38:05.500', 11.80000, 221, 0.28000)('2018-10-03 14:38:16.600', 13.40000, 223, 0.29000) " +
                //               "d1004 USING power.meters TAGS('California.LosAngeles', 3) VALUES('2018-10-03 14:38:05.000', 10.80000, 223, 0.29000)('2018-10-03 14:38:06.500', 11.50000, 221, 0.35000)";
                IntPtr res = TDengine.Query(conn, sql);
                CheckRes(conn, res, "failed to insert data");
                int affectedRows = TDengine.AffectRows(res);
                Console.WriteLine("affectedRows " + affectedRows);
                TDengine.FreeResult(res);
            }
            finally
            {
                TDengine.Close(conn);
            }
        }


    }
}