using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq.Expressions;
using System.Threading.Tasks;

namespace FreeSql {
	public interface IDelete<T1> where T1 : class {

		/// <summary>
		/// 指定事务对象
		/// </summary>
		/// <param name="transaction"></param>
		/// <returns></returns>
		IDelete<T1> WithTransaction(DbTransaction transaction);
		/// <summary>
		/// 指定事务对象
		/// </summary>
		/// <param name="transaction"></param>
		/// <returns></returns>
		IDelete<T1> WithConnection(DbConnection connection);

		/// <summary>
		/// lambda表达式条件，仅支持实体基础成员（不包含导航对象）
		/// </summary>
		/// <param name="exp">lambda表达式条件</param>
		/// <returns></returns>
		IDelete<T1> Where(Expression<Func<T1, bool>> exp);
		/// <summary>
		/// 原生sql语法条件，Where("id = ?id", new { id = 1 })
		/// </summary>
		/// <param name="sql">sql语法条件</param>
		/// <param name="parms">参数</param>
		/// <returns></returns>
		IDelete<T1> Where(string sql, object parms = null);
		/// <summary>
		/// 传入实体，将主键作为条件
		/// </summary>
		/// <param name="item">实体</param>
		/// <returns></returns>
		IDelete<T1> Where(T1 item);
		/// <summary>
		/// 传入实体集合，将主键作为条件
		/// </summary>
		/// <param name="items">实体集合</param>
		/// <returns></returns>
		IDelete<T1> Where(IEnumerable<T1> items);
		/// <summary>
		/// 子查询是否存在
		/// </summary>
		/// <typeparam name="TEntity2"></typeparam>
		/// <param name="select">子查询</param>
		/// <param name="notExists">不存在</param>
		/// <returns></returns>
		IDelete<T1> WhereExists<TEntity2>(ISelect<TEntity2> select, bool notExists = false) where TEntity2 : class;
		/// <summary>
		/// 传入动态对象如：主键值 | new[]{主键值1,主键值2} | TEntity1 | new[]{TEntity1,TEntity2} | new{id=1}
		/// </summary>
		/// <param name="dywhere">主键值、主键值集合、实体、实体集合、匿名对象、匿名对象集合</param>
		/// <returns></returns>
		IDelete<T1> WhereDynamic(object dywhere);

		/// <summary>
		/// 设置表名规则，可用于分库/分表，参数1：默认表名；返回值：新表名；
		/// </summary>
		/// <param name="dataTable"></param>
		/// <returns></returns>
		IDelete<T1> AsTable(Func<string, string> tableRule);
		/// <summary>
		/// 动态Type，在使用 Delete&lt;object&gt; 后使用本方法，指定实体类型
		/// </summary>
		/// <param name="entityType"></param>
		/// <returns></returns>
		IDelete<T1> AsType(Type entityType);
		/// <summary>
		/// 返回即将执行的SQL语句
		/// </summary>
		/// <returns></returns>
		string ToSql();
		/// <summary>
		/// 执行SQL语句，返回影响的行数
		/// </summary>
		/// <returns></returns>
		int ExecuteAffrows();
		Task<int> ExecuteAffrowsAsync();
		/// <summary>
		/// 执行SQL语句，返回被删除的记录
		/// </summary>
		/// <returns></returns>
		List<T1> ExecuteDeleted();
		Task<List<T1>> ExecuteDeletedAsync();
	}
}