using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Common.Utils;
using Newtonsoft.Json;
using Server.MyClass.Class;
using Server.Services.DataMigration.Services;
using Server.Services.DataMigration.Services.OldMDK;
using Server.Utils;

namespace Server.Services.DataMigration
{
    /// <summary>
    /// 数据迁移管理服务
    /// </summary>
    public class DataMigrationManageSerivce
    {
        private DataMigrationManageSerivce()
        {

        }

        private static DataMigrationManageSerivce _dataMigrationManageSerivce;

        private static object lockobj = new object();
        /// <summary>
        /// 实例
        /// </summary>
        public static DataMigrationManageSerivce Instance
        {
            get
            {
                if (_dataMigrationManageSerivce == null)
                {
                    lock (lockobj)
                    {
                        if (_dataMigrationManageSerivce == null)
                        {
                            _dataMigrationManageSerivce = new DataMigrationManageSerivce();
                        }
                    }
                }
                return _dataMigrationManageSerivce;
            }
        }
        /// <summary>
        /// 检查导入数据包，并且解压
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public string Check(string path)
        {
            string dir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "DataMigration");
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            //开始解压
            if (!ZipHelper.UnZipFile(path, dir, out var err))
            {
                return err;
            }
            if (!File.Exists(Path.Combine(dir, "PackInfo.json")))
            {
                return "打包信息不存在。";
            }
            var json = File.ReadAllText(Path.Combine(dir, "PackInfo.json"));
            if (string.IsNullOrWhiteSpace(json))
            {
                return "打包信息不存在2";
            }
            var packInfo = JsonConvert.DeserializeObject<PackInfo>(json);
            if (packInfo == null)
            {
                return "打包信息不存在3";
            }
            return null;
        }
        /// <summary>
        /// 开始启动
        /// </summary>
        /// <param name="path"></param>
        public string Start(string path)
        {
            string dir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "DataMigration");
            if (!Directory.Exists(dir))
            {
                return "请先调用检查数据包";
            }
            if (!File.Exists(Path.Combine(dir, "PackInfo.json")))
            {
                return "打包信息不存在";
            }
            var json = File.ReadAllText(Path.Combine(dir, "PackInfo.json"));
            if (string.IsNullOrWhiteSpace(json))
            {
                return "打包信息不存在";
            }
            var packInfo = JsonConvert.DeserializeObject<PackInfo>(json);
            if (packInfo == null)
            {
                return "打包信息不存在";
            }
            var th = new Thread(() =>
            {
                //迁移开始
                DataMigrationProgressService.Instance.Start();
                var state = DataMigrationProgressService.Instance.GetState();
                try
                {
                    var ser = new GeneralHandleMigrationService();
                    ser.RootDir = dir;
                    ser.Name = packInfo.TypeName;
                    ser.PackInfo = packInfo;
                    ser.Initialize();
                    ser.Start(state.AddLog);
                }
                catch (Exception e)
                {
                    state.AddLog("出现错误：" + e.ToString());
                }
                finally
                {
                    DataMigrationProgressService.Instance.Stop();
                }
            });
            th.IsBackground = true;
            th.Start();
            return null;
        }


        public void Test()
        {
            string dir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "DataMigration");
            if (!Directory.Exists(dir))
            {
                Start(@"C:\Code\yz_dataconvert\yz_dataconvert\bin\Debug\transition.zip");
            }
            if (!File.Exists(Path.Combine(dir, "PackInfo.json")))
            {
                return;
            }
            var json = File.ReadAllText(Path.Combine(dir, "PackInfo.json"));
            if (string.IsNullOrWhiteSpace(json))
            {
                return;
            }
            var packInfo = JsonConvert.DeserializeObject<PackInfo>(json);
            if (packInfo == null)
            {
                return;
            }
            var ser = new GeneralHandleMigrationService();
            ser.RootDir = dir;
            ser.Name = packInfo.TypeName;
            ser.PackInfo = packInfo;
            ser.Initialize();
            ser.Start(Console.WriteLine);
        }
    }
}