using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CloudBuilder.Core.DatabaseAccessor.Entity
{
    /// <summary>
    /// 业务单元操作接口
    /// </summary>
    public interface IUnitOfWork : IDisposable
    {
        /// <summary>
        /// 获取 工作单元的事务是否已提交
        /// </summary>
        bool HasCommitted { get; }

        /// <summary>
        /// 添加DbContext共享事务
        /// </summary>
        void AddDbContext(DbContext dbContext);
        /// <summary>
        /// 获取指定数据实体的上下文类型
        /// </summary>
        /// <param name="entityType">实体类型</param>
        /// <returns>实体所属上下文实例</returns>
        DbContext GetDbContext();

        /// <summary>
        /// 对数据库连接开启事务
        /// </summary>
        void BeginOrUseTransaction();

        /// <summary>
        /// 对数据库连接开启事务
        /// </summary>
        /// <param name="cancellationToken">异步取消标记</param>
        /// <returns></returns>
        Task BeginOrUseTransactionAsync(CancellationToken cancellationToken = default);

        /// <summary>
        /// 提交当前上下文的事务更改
        /// </summary>
        void Commit();

        /// <summary>
        /// 回滚所有事务
        /// </summary>
        void Rollback();
    }
}