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.UserServer.Application
{
    /// <summary>
    /// 查询角色用户列表
    /// </summary>
    public class GetRoleUserInfosQueryHandler(
            IRepository<Role> repRole,
            IRepository<User> repUser,
            IRepository<UserRole> repUserRole
        ) : IRequestHandler<GetRoleUserInfosQuery, List<GetRoleUserInfosQueryResultItem>>
    {
        private readonly IRepository<Role> repRole = repRole;
        private readonly IRepository<User> repUser = repUser;
        private readonly IRepository<UserRole> repUserRole = repUserRole;

        /// <inheritdoc/>
        public async Task<List<GetRoleUserInfosQueryResultItem>> Handle(GetRoleUserInfosQuery request, CancellationToken cancellationToken)
        {
            var role = await repRole.AsQueryable().AsNoTracking()
                .Where(it => it.Id == request.RoleId)
                .Select(it => new
                {
                    it.UserType,
                })
                .FirstOrDefaultAsync(cancellationToken);
            if (role == null) throw Oops.Oh(EnumErrorCodeType.s404, "角色");
            var userIds = await repUserRole.AsQueryable().AsNoTracking()
                .Where(it => it.RoleId == request.RoleId)
                .Select(it => it.UserId)
                .ToListAsync(cancellationToken);
            var userInfos = await repUser.AsQueryable().AsNoTracking()
                .Where(it => it.Type == role.UserType)
                .ProjectToType<GetRoleUserInfosQueryResultItem>()
                .ToListAsync(cancellationToken);
            foreach (var userInfo in userInfos)
            {
                userInfo.IsChecked = userIds.Contains(userInfo.Id);
            }
            return userInfos;
        }
    }
}