using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using FreeSql;
using CnasSynchronousCommon;
using System.Data.Entity;

namespace CnasSynchronusDAL
{
    public static class KingbaseHelper
    {
        private static IFreeSql fsql;
        public static string strNameSpace = string.Empty;
        private static char strBiao = '.';

        public static (string, string) GetDatabaseAndNamespace(string strServerHost)
        {
            if (strServerHost.Contains(strBiao))
            {
                return (strServerHost.Split(strBiao)[0], strServerHost.Split(strBiao)[1]);

            }
            return ("", "");
        }

        public static void InitConnectionString(string strServerIP, string strServerPort, string strServerHost, string strServerUser, string strServerPwd)
        {
           var databaseAndNamespace = GetDatabaseAndNamespace(strServerHost);
            strNameSpace = databaseAndNamespace.Item2;
            string connectionString = $"Host={strServerIP};Port={strServerPort};Database={databaseAndNamespace.Item1};Username={strServerUser};Password={strServerPwd};";



            InitFreeSql(connectionString);
        }

        public static void InitConnectionString(string connectionString)
        {
            InitFreeSql(connectionString);
        }

        private static void InitFreeSql(string connectionString)
        {
            fsql = new FreeSqlBuilder()
                .UseConnectionString(DataType.KingbaseES, connectionString)
                .UseAutoSyncStructure(false) // 不自动同步结构
                .Build();
        }

        /// <summary>
        /// 执行SQL语句，返回影响的行数
        /// </summary>
        public static int ExecuteNonQuery(string sql, object parameters = null)
        {
            try
            {
                return fsql.Ado.ExecuteNonQuery(sql, parameters);
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
                throw;
            }
        }

        /// <summary>
        /// 执行SQL语句，返回第一行第一列的值
        /// </summary>
        public static T ExecuteScalar<T>(string sql, object parameters = null)
        {
            try
            {
                //return fsql.Ado.ExecuteScalar<T>(sql, parameters);

                return default(T);
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
                throw;
            }
        }

        /// <summary>
        /// 执行SQL查询，返回DataTable
        /// </summary>
        public static DataTable ExecuteDataTable(string sql, object parameters = null)
        {
            try
            {
                return fsql.Ado.ExecuteDataTable(sql, parameters);
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
                return null;
            }
        }

        /// <summary>
        /// 执行SQL查询，返回DataSet
        /// </summary>
        public static DataSet ExecuteDataSet(string sql, object parameters = null)
        {
            try
            {
                return fsql.Ado.ExecuteDataSet(sql, parameters);
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
                throw;
            }
        }

        /// <summary>
        /// 测试数据库连接
        /// </summary>
        public static bool TestConnectKingbase()
        {
            try
            {
                string connStr = "Host=localhost;Port=54321;Database=test;Username=system;Password=1;";
                using (var fsql = new FreeSqlBuilder()
                    .UseConnectionString(DataType.KingbaseES, connStr)
                    .Build())
                {
                    return (int)fsql.Ado.ExecuteScalar("SELECT 1") == 1;

                }
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
                return false;
            }
        }
    }
}