using Microsoft.EntityFrameworkCore.ChangeTracking;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Threading.Tasks;

namespace IRaCIS.Core.Domain
{
    /// <summary>
    /// 仓储接口
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public interface IRepository<T> where T : class
    {
        IQueryable<T> GetAll();
        T Add(T t);
        IEnumerable<T> AddRange(IEnumerable<T> t);
        void Delete(T t);
        bool Delete(Expression<Func<T, bool>> exp);
        void Update(T t);
        Task AddOrUpdateAsync(T t);

        bool Update(Expression<Func<T, bool>> where, Expression<Func<T, T>> entity);
        bool IsExist(Expression<Func<T, bool>> exp);
        int GetCount(Expression<Func<T, bool>> exp=null);
        T FindSingleOrDefault(Expression<Func<T, bool>> exp = null);
        IQueryable<T> Find(Expression<Func<T, bool>> exp = null);
        IQueryable<T> Find<type>(int pageSize, int pageIndex, bool isAsc, Expression<Func<T, type>> orderByLambda, Expression<Func<T, bool>> whereLambda=null);

        IQueryable<T> Find(int pageSize, int pageIndex, bool isAsc, string propName,
            Expression<Func<T, bool>> whereLambda);
        bool SaveChanges();

        ValueTask<EntityEntry<T>> AddAsync(T entity);

        Task<int> DeleteAsync(Expression<Func<T, bool>> whereLambda);
        Task<int> UpdateAsync(Expression<Func<T, bool>> whereLambda, Expression<Func<T, T>> entity);

        Task<bool> IsExistAsync(Expression<Func<T, bool>> whereLambda);

        Task<T> GetFirstOrDefaultAsync(Expression<Func<T, bool>> whereLambda);

        Task<int> GetCountAsync(Expression<Func<T, bool>> whereLambda = null);

        Task<int> SaveChangesAsync();

    }
}