using FlexJobApi.Core;
using Furion.DatabaseAccessor;
using Furion.FriendlyException;
using Mapster;
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>
    /// 保存菜单
    /// </summary>
    public class MenuSaveCommandHandler(
        IRepository<Menu> menuRep)
        : IRequestHandler<MenuSaveCommand, Guid>
    {
        private readonly IRepository<Menu> menuRep = menuRep;

        /// <inheritdoc/>
        public async Task<Guid> Handle(MenuSaveCommand request, CancellationToken cancellationToken)
        {
            var menu =
                request.Id.HasValue
                ? await menuRep.AsQueryable().FirstOrDefaultAsync(it => it.Id == request.Id, cancellationToken)
                : new Menu();
            if (menu == null) throw Oops.Oh(EnumUserErrorCodeType.s100, "菜单");

            if (request.Id.HasValue && menu.Code != request.Code)
            {
                throw Oops.Oh(EnumUserErrorCodeType.s200, "编号不可修改");
            }

            request.Adapt(menu);

            if (menu.ParentId.HasValue)
            {
                menu.Path = await menuRep.AsQueryable().AsNoTracking().Where(it => it.Id == menu.ParentId).Select(it => it.Path).FirstOrDefaultAsync();
                menu.Path = $"{menu.Path}/{menu.Code}";
            }
            else
            {
                menu.Path = "/";
            }

            var result = request.Id == null
                ? await menuRep.InsertAsync(menu, cancellationToken: cancellationToken)
                : await menuRep.UpdateAsync(menu);

            await menuRep.SaveNowAsync(cancellationToken);

            return menu.Id;
        }
    }
}