using FlexJobApi.Core;
using Furion;
using Furion.DatabaseAccessor;
using Mapster;
using MediatR;
using Microsoft.AspNetCore.Http;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FlexJobApi.UserServer.Application
{
    /// <summary>
    /// 获取当前登录用户菜单
    /// </summary>
    public class GetCurrentLogierMenusQueryHandler(
            IRepository<Menu> repMenu,
            IRepository<RoleMenu> repRoleMenu,
            IRepository<UserRole> repUserInfoRole
        )
        : IRequestHandler<GetCurrentLogierMenusQuery, List<GetMenusQueryResultItem>>
    {
        private readonly IRepository<Menu> repMenu = repMenu;
        private readonly IRepository<RoleMenu> repRoleMenu = repRoleMenu;
        private readonly IRepository<UserRole> repUserInfoRole = repUserInfoRole;

        /// <inheritdoc/>
        public async Task<List<GetMenusQueryResultItem>> Handle(GetCurrentLogierMenusQuery request, CancellationToken cancellationToken)
        {
            var logier = JwtUtils.GetCurrentLogier();
            var q = repMenu.AsQueryable().AsNoTracking()
                .OrderBy(it => it.Sort).ThenBy(it => it.CreatedTime)
                .Where(it => it.UserType == logier.Type && it.ClientType == logier.ClientType)
                .Where(it => it.Type == EnumMenuType.Menu || it.Type == EnumMenuType.Page || it.Type == EnumMenuType.Modal);
            if (logier.Level != 999)
            {
                var menuIds = await repRoleMenu.AsQueryable().AsNoTracking()
                    .Where(it => it.Role.UserRoles.Any(ur => ur.UserId == logier.Id))
                    .Select(it => it.MenuId)
                    .ToListAsync(cancellationToken);
                q = q.Where(it => menuIds.Contains(it.Id));
            }
            var all = await q.ProjectToType<GetMenusQueryResultItem>().ToListAsync();
            var models = all.Where(it => it.ParentId == null).ToList();
            LoopChildrens(models, all, []);
            return models;
        }

        /// <summary>
        /// 递归赋值下级菜单
        /// </summary>
        /// <param name="models"></param>
        /// <param name="all"></param>
        /// <param name="roleMenuIds"></param>
        private void LoopChildrens(List<GetMenusQueryResultItem> models, List<GetMenusQueryResultItem> all, List<Guid> roleMenuIds)
        {
            foreach (var item in models)
            {
                item.IsChecked = roleMenuIds.Contains(item.Id);
                item.Children = all.Where(it => it.ParentId == item.Id).ToList();
                if (item.Children.IsNotNull())
                {
                    LoopChildrens(item.Children, all, roleMenuIds);
                }
            }
        }
    }
}