using System;
using System.Linq;
using System.Linq.Expressions;
using YZXYH.Repository.Models;

namespace YZXYH.Repository.Interface
{
	public interface IBaseRepository<T>
	{

		/// <summary>
		/// 是否存在
		/// </summary>
		/// <param name="exp">过滤条件</param>
		/// <returns></returns>
		bool IsExist(Expression<Func<T, bool>> exp);
		
		/// <summary>
		/// 过滤排序查询
		/// </summary>
		/// <param name="exp">过滤条件（eg: u=>u.Id="1"）</param>
		/// <param name="orderBy">排序（eg: q=>q.OrderByDescending(u=>u.Name)）</param>
		/// <param name="includeProperties">外键</param>
		/// <returns> 对象集合</returns>
		IQueryable<T> Get(Expression<Func<T, bool>> exp = null,
			Func<IQueryable<T>, IOrderedQueryable<T>> orderBy = null, string includeProperties = "");
		
		/// <summary>
		/// 分页排序记录
		/// </summary>
		/// <param name="pageindex">The pageindex.</param>
		/// <param name="pagesize">The pagesize.</param>
		/// <param name="orderBy">排序（eg: q=>q.OrderByDescending(u=>u.Name)）</param>
		/// <param name="exp">过滤条件（eg: u=>u.Id="1"）</param>
		/// <param name="includeProperties">外键</param>
		IQueryable<T> Get(int pageindex, int pagesize, Func<IQueryable<T>, IOrderedQueryable<T>> orderBy = null,
			Expression<Func<T, bool>> exp = null, string includeProperties = "");
		
		/// <summary>
		/// 查找单个
		/// </summary>
		T GetSingle(Expression<Func<T, bool>> exp);
		
		/// <summary>
		/// 根据Id获取数据
		/// </summary>
		/// <param name="id"></param>
		/// <returns></returns>
		T GetById(string id);
		
		/// <summary>
		/// 根据过滤条件获取记录数
		/// </summary>
		int GetCount(Expression<Func<T, bool>> exp = null);
		
		/// <summary>
		/// 普通插入
		/// </summary>
		/// <param name="t"></param>
		void Insert(T t);
		
		/// <summary>
		/// 没有主键Id的插入
		/// </summary>
		/// <param name="t"></param>
		void InsertNoId(T t);

		/// <summary>
		/// 批量插入
		/// </summary>
		/// <param name="ts">The entities.</param>
		void BatchInsert(T[] ts);
		
		/// <summary>
		/// 删除记录
		/// </summary>
		/// <param name="t"></param>
		void Delete(T t);
		
		/// <summary>
		/// 删除记录
		/// </summary>
		/// <param name="exp">过滤条件</param>
		void Delete(Expression<Func<T, bool>> exp);
		

		/// <summary>
		///根据Id删除
		/// </summary>
		/// <param name="id"></param>
		void DeleteById(string id);
		
		/// <summary>
		/// 更新
		/// </summary>
		/// <param name="t"></param>
		void Update(T t);
		
		/// <summary>
		/// 实现按需要只更新部分更新
		/// <para>如：Update(u =>u.Id==1,u =>new User{Name="ok"});</para>
		/// </summary>
		/// <param name="where">The where.</param>
		/// <param name="t">The entity.</param>
		void Update(Expression<Func<T, bool>> where, Expression<Func<T, T>> t);
	
		/// <summary>
		/// 按指定id更新实体,会更新整个实体
		/// </summary>
		/// <param name="identityExp">The identity exp.</param>
		/// <param name="t">The entity.</param>
		void Update(Expression<Func<T, object>> identityExp, T t);

		/// <summary>
		/// 查询记录条数(Chat.js)
		/// </summary>
		/// <param name="queryStrs">参数 “表名 | 条件语句 , 表名 | 条件语句”</param>
		/// （多个查询以 , 分隔，表名与条件语句以 | 分隔）
		/// <returns></returns>
		string[] GetCounts(string[] queryStrs);

		bool Save();
	}
}