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 Server.Utils;
using SqlSugar;

namespace Server.Services.DataMigration
{
    /// <summary>
    /// 数据迁移进度监控服务
    /// </summary>
    public class DataMigrationProgressService
    {
        private DataMigrationProgressService()
        {
        }
        private static DataMigrationProgressService _migrationService;
        private static object lockobj = new object();
        /// <summary>
        /// 单例的属性
        /// </summary>
        public static DataMigrationProgressService Instance
        {
            get
            {
                if (_migrationService == null)
                {
                    lock (lockobj)
                    {
                        if (_migrationService == null)
                        {
                            _migrationService = new DataMigrationProgressService();
                        }
                    }
                }
                return _migrationService;
            }
        }
        /// <summary>
        /// 迁移进度
        /// </summary>
        private MigrationProgressState State { get; set; }
        /// <summary>
        /// 开始记录
        /// </summary>
        public void Start()
        {
            State = new MigrationProgressState();
            this.State.StartDateTime = DateTime.Now;
            this.State.State = 1;
        }
        /// <summary>
        /// 停止
        /// </summary>
        public void Stop()
        {
            this.State.EndDateTime=DateTime.Now;
            this.State.ElapsedTime = (this.State.EndDateTime - this.State.StartDateTime).TotalMinutes;
            this.State.State = 2;
        }
        /// <summary>
        /// 获取当前迁移进度
        /// </summary>
        /// <returns></returns>
        public MigrationProgressState GetState()
        {
            return this.State;
        }

    }
    /// <summary>
    /// 迁移状态
    /// </summary>
    public class MigrationProgressState
    {
        /// <summary>
        /// 开始时间
        /// </summary>
        public DateTime StartDateTime { get; set; }
        /// <summary>
        /// 结束时间
        /// </summary>
        public DateTime EndDateTime { get; set; }
        /// <summary>
        /// 总耗时（分钟）
        /// </summary>
        public double ElapsedTime { get; set; }
        /// <summary>
        /// 处理状态 0未开始 1处理中 2完成
        /// </summary>
        public int State { get; set; }
        /// <summary>
        /// 日志
        /// </summary>
        public List<string> Logs { get; set; } = new List<string>();
        /// <summary>
        /// 添加日志
        /// </summary>
        /// <param name="text"></param>
        public void AddLog(string text)
        {
            if (Logs.Count > 10)
            {
                Logs.RemoveAt(0);
            }
            Logs.Add(text);
        }
    }
}