using FlexJobApi.Core;
using Furion.DatabaseAccessor;
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.Application
{
    /// <summary>
    /// 查询字典类别分页列表数据
    /// </summary>
    public class GetDictionaryCategoriesQueryHandler(
            IRepository<DictionaryCategory> rep
        ) : IRequestHandler<GetDictionaryCategoriesQuery, PagedListQueryResult<GetDictionaryCategoriesQueryResultItem>>
    {
        private readonly IRepository<DictionaryCategory> rep = rep;

        public async Task<PagedListQueryResult<GetDictionaryCategoriesQueryResultItem>> Handle(GetDictionaryCategoriesQuery request, CancellationToken cancellationToken)
        {
            var q = rep.AsQueryable().AsNoTracking()
                .OrderBy(it => it.Sort).ThenBy(it => it.CreatedTime)
                .AsQueryable();
            if (request.Keywords.IsNotNull())
            {
                q = q.Where(it =>
                    it.Code.Contains(request.Keywords) ||
                    it.Name.Contains(request.Keywords) ||
                    it.Remark.Contains(request.Keywords));
            }
            var result = await q
                .ProjectToType<GetDictionaryCategoriesQueryResultItem>()
                .ToPagedListAsync(request.PageModel, cancellationToken);
            return result;
        }
    }
}