using MathNet.Numerics.Distributions;
using System.Collections.Generic;

namespace IStation.DAL
{
    /// <summary>
    ///   
    /// </summary>
    public class ScheduleConclusion
    {
        public SqlSugarClient Connection
        {
            get { return ConfigHelper.GetSqlSugarClient(); }
        }

        private readonly string _tableNamePrefix = "ScheduleConclusion_Cl_";

        /// <summary>
        /// 判断数据库是否存在表
        /// </summary> 
        public bool ExistTable(string runFlag)
        {
            using (SqlSugarClient db = Connection)
            {
                var sql = $"select count(*)  from sqlite_master where type = 'table' and name = '{_tableNamePrefix}{runFlag}';";
                var bol = db.Ado.ExecuteCommand(sql) > 0;
                return bol;
            }
        }


        /// <summary>
        /// 判断数据库是否存在表
        /// </summary>
        public bool ExistTable_NativeSql(string runFlag)
        {
            var tables = new List<string>();
            using (var connection = new SQLiteConnection(ConfigHelper.ConnectionString))
            {
                connection.Open();
                string query = "SELECT name FROM sqlite_master WHERE type='table';";
                using (var command = new SQLiteCommand(query, connection))
                {
                    using (var reader = command.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            var tableName = reader["name"].ToString();
                            tables.Add(tableName);
                        }
                    }
                }
            }
            var currentTable = $"{_tableNamePrefix}{runFlag}";
            return tables.Contains(currentTable);
        }



        /// <summary>
        /// 大批量插入
        /// </summary>
        public bool BulkInserts_SplitTable(List<Entity.ScheduleConclusion> list)
        {
            if (list == null || list.Count < 1)
                return default;
            using (SqlSugarClient db = Connection)
            {
                ///自己来制定定义的规则
                db.CurrentConnectionConfig.ConfigureExternalServices.SplitTableService = new Entity.ScheduleConclusionSubTableService();
                db.CodeFirst
                    .SplitTables()//标识分表
                    .InitTables<Entity.ScheduleConclusion>(); //程序启动时加这一行,如果一张表没有会初始化一张


                //大数据写入+表不存在会建表
                //自动找表大数据写入 
                return db.Fastest<Entity.ScheduleConclusion>().SplitTable().BulkCopy(list) > 0;
            }
        }


        /// <summary>
        /// 大批量插入
        /// </summary> 
        public bool BulkInserts_NativeSql(string runFlag, List<Entity.ScheduleConclusion> list)
        {
            var connect = ConfigHelper.ConnectionString;
            SQLiteConnection connection = new SQLiteConnection(connect);//连接对象初始化 
            connection.Open();//打开连接

            SQLiteCommand command = new SQLiteCommand(connection);//命令对象初始化 
            command.CommandText = $"VACUUM;";//执行VACUUM命令收缩数据库
            command.ExecuteNonQuery();

            SQLiteTransaction transaction = connection.BeginTransaction();//开始事务 

            var sql_exist_table = $"select count(*)  from sqlite_master where type = 'table' and name = '{_tableNamePrefix}{runFlag}';";
            command.CommandText = sql_exist_table;
            if (command.ExecuteNonQuery() < 1)//没有表就创建表
            {
                var sql_create_table = $"CREATE TABLE  {_tableNamePrefix}{runFlag}  (\r\n    ID                BIGINT        NOT NULL\r\n                                    PRIMARY KEY,\r\n    ScheduleCombineID BIGINT,\r\n    RunFlag           VARCHAR (255),\r\n    Pump1             REAL,\r\n    Pump2             REAL,\r\n    Pump3             REAL,\r\n    Head              REAL,\r\n    Flow              REAL,\r\n    Power             REAL,\r\n    WP                REAL,\r\n    UWP               REAL\r\n);\r\n";
                command.CommandText = sql_create_table;
                command.ExecuteNonQuery();
            }

            for (int i = 0; i < list.Count; i++) //[---使用事务---]执行INSERT命令
            {
                var sql_insert = $"INSERT INTO {_tableNamePrefix}{runFlag}(ID, ScheduleCombineID, RunFlag, Pump1, Pump2, Pump3, Head, Flow, Power, WP, UWP) " +
                    $"VALUES ('{list[i].ID}','{list[i].ScheduleCombineID}','{list[i].RunFlag}','{list[i].Pump1}','{list[i].Pump2}','{list[i].Pump3}','{list[i].Head}','{list[i].Flow}','{list[i].Power}','{list[i].WP}','{list[i].UWP}')";
                command.CommandText = sql_insert;
                command.ExecuteNonQuery();
            }
            command.ExecuteScalar();
            transaction.Commit();//提交事务
            connection.Close();//关闭连接 
            return true;
        }


    }
}