using SqlSugar;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace zzz.Repository.UnitOfWork
{
    public class UnitOfWork: IUnitOfWork
    {
        private readonly ISqlSugarClient _sqlSugarClient;

        private int _tranCount { get; set; }

        public UnitOfWork(ISqlSugarClient sqlSugarClient)
        {
            _sqlSugarClient = sqlSugarClient;
            _tranCount = 0;
        }

        /// <summary>
        /// 获取DB，保证唯一性
        /// </summary>
        /// <returns></returns>
        public SqlSugarScope GetDbClient()
        {
            // 必须要as，后边会用到切换数据库操作  
            // 因为注入的是 SqlSugarScope 所以这里可以转化成功
            return _sqlSugarClient as SqlSugarScope;
        }

        public void BeginTran()
        {
            lock (this)
            {
                _tranCount++;
                GetDbClient().BeginTran();
            }
        }

        public void CommitTran()
        {
            lock (this)
            {
                _tranCount--;
                if (_tranCount == 0)
                {
                    try
                    {
                        GetDbClient().CommitTran();
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.Message);
                        GetDbClient().RollbackTran();
                    }
                }
            }
        }

        public void RollbackTran()
        {
            lock (this)
            {
                _tranCount--;
                GetDbClient().RollbackTran();
            }
        }

    }
}