using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using QMFrameWork.Data;

namespace NSC
{
    /// <summary>
    /// 功能：异步网络服务引擎
    /// 作者：王昊昇
    /// 时间：2012.11.8
    /// </summary>
    public static class ServiceDataBufferEngine
    {
        /// <summary>
        /// 创建新的服务流水号
        /// </summary>
        /// <returns>返回一个新的服务流水号</returns>
        public static string CreateNewServiceSN()
        {
            Common.Data.SqlLite.SqlLiteHelper dal = new Common.Data.SqlLite.SqlLiteHelper();
            using (System.Data.IDbConnection conn = dal.OpenConnection(Common.Config.ConfigSetting.GetConnectionString()))
            {
                string pid = dal.GetSingle(conn,
                "INSERT INTO T_SERVICELOG(SERVICEPATH,SUBMITTIME,COMPLETE) VALUES('','" + DateTime.Now.ToString(Common.TextUtil.DateTimeUtil.DATETIME_YYYYMMDD_HHMMSS) + "','0');"
                + Common.Data.SqlLite.SqlLiteHelper.SELECT_IDENTITY_ID).ToString();
                return pid;
            }
        }

        /// <summary>
        /// 写入服务数据文件
        /// </summary>
        /// <param name="serviceSN">服务代码</param>
        /// <param name="data">要写入的服务数据</param>
        public static void WriteServiceFile(string serviceSN, NetServiceStruct data)
        {
            string configPath = Common.Config.ConfigSetting.GetSetting("0001");
            string fileName = configPath == "" ? System.Windows.Forms.Application.StartupPath + @"\ServiceBuffer\" + serviceSN : configPath + @"\" + serviceSN;
            using (System.IO.MemoryStream ms = PacketsEncoder.ConvertToStream(data))
            using (System.IO.FileStream fs = new System.IO.FileStream(fileName, System.IO.FileMode.Create, System.IO.FileAccess.Write, System.IO.FileShare.Read))
            {
                fs.Write(ms.ToArray(), 0, (int)ms.Length);
                fs.Flush();
            }

            Common.Data.SqlLite.SqlLiteHelper dal = new Common.Data.SqlLite.SqlLiteHelper();
            using (System.Data.IDbConnection conn = dal.OpenConnection(Common.Config.ConfigSetting.GetConnectionString()))
            {
                dal.ExecuteSql(conn, string.Format("UPDATE T_SERVICELOG SET SERVICEPATH={0},COMPLETE='1' WHERE PID={1}", fileName, serviceSN));
            }
        }

        /// <summary>
        /// 获取执行结果
        /// </summary>
        /// <param name="serviceSN">服务代码</param>
        /// <param name="data">结果数据</param>
        /// <returns>返回是否执行成功</returns>
        public static bool GetServiceResult(string serviceSN, out NetServiceStruct data)
        {
            Common.Data.SqlLite.SqlLiteHelper dal = new Common.Data.SqlLite.SqlLiteHelper();
            using (System.Data.IDbConnection conn = dal.OpenConnection(Common.Config.ConfigSetting.GetConnectionString()))
            using (System.Data.DataTable table = dal.QueryReturnDataTable(conn, string.Format("SELECT VERSIONNO FROM T_UPDATE")))
            {
                if (table.Rows.Count > 0)
                {
                        using (System.IO.FileStream fs = new System.IO.FileStream(table.Rows[0]["VERSIONNO"].ToString(), System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read))
                        using (System.IO.MemoryStream ms = new System.IO.MemoryStream((int)fs.Length))
                        {
                            fs.CopyTo(ms);

                            data = PacketsDecoder.ParseNetStream(ms);
                        }

                        return true;
                }
                else
                {
                    data = null;
                    throw new Common.Exceptions.NoServiceLogException();
                }
            }
        }
    }
}