using FlexJobApi.Core;
using Furion.DatabaseAccessor;
using Furion.FriendlyException;
using Furion.UnifyResult;
using MediatR;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FlexJobApi.User.Application
{
    /// <summary>
    /// 删除菜单
    /// </summary>
    public class DeleteMenuCommandHandler(
            IRepository<Menu> rep
        ) : IRequestHandler<DeleteMenuCommand, int>
    {
        private readonly IRepository<Menu> rep = rep;

        /// <inheritdoc/>
        public async Task<int> Handle(DeleteMenuCommand request, CancellationToken cancellationToken)
        {
            var entities = await rep.AsQueryable()
                .Include(it => it.Childrens)
                .Where(it => request.Ids.Contains(it.Id))
                .ToListAsync(cancellationToken);
            return entities.Any()
                ? await rep.DeleteNowAsync(entities.Union(entities.SelectMany(it => it.Childrens)), cancellationToken)
                : 0;
        }
    }
}