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>
    /// 获取当前登录用户菜单详情
    /// </summary>
    public class GetCurrentLogierMenuQueryHandler(
            IRepository<Menu> repMenu,
            IRepository<RoleMenu> repRoleMenu,
            IRepository<UserInfoRole> repUserInfoRole
        ) : IRequestHandler<GetCurrentLogierMenuQuery, GetMenuQueryResult>
    {
        private readonly IRepository<Menu> repMenu = repMenu;
        private readonly IRepository<RoleMenu> repRoleMenu = repRoleMenu;
        private readonly IRepository<UserInfoRole> repUserInfoRole = repUserInfoRole;

        /// <inheritdoc/>
        public async Task<GetMenuQueryResult> Handle(GetCurrentLogierMenuQuery request, CancellationToken cancellationToken)
        {
            var logier = JwtUtils.GetCurrentLogier();
            var model = await repMenu.AsQueryable().AsNoTracking()
                .Where(it => it.Id == request.Id)
                .ProjectToType<GetMenuQueryResult>()
                .FirstOrDefaultAsync(cancellationToken);
            if (model == null) throw Oops.Oh(EnumErrorCodeType.s404, "该菜单");
            var q = repMenu.AsQueryable().AsNoTracking()
                .OrderBy(it => it.Sort).ThenBy(it => it.CreatedTime)
                .Where(it => it.ParentId == model.Id)
                .Where(it => it.Type == EnumMenuType.Button || it.Type == EnumMenuType.Field);
            if (logier.Level != 999)
            {
                var menuIds = await repRoleMenu.AsQueryable().AsNoTracking()
                    .Where(it => it.Role.UserInfoRoles.Any(ur => ur.UserInfoId == logier.UserInfoId))
                    .Select(it => it.MenuId)
                    .ToListAsync(cancellationToken);
                q = q.Where(it => menuIds.Contains(it.Id));
            }
            var items = await q
                .ProjectToType<GetMenuQueryResultItem>()
                .ToListAsync(cancellationToken);
            model.Groups = items.GroupBy(it => it.Group ?? "default")
                .Select(it => new GetMenuQueryResultGroup
                {
                    Group = it.Key,
                    ButtonLocations = it
                        .Where(l => l.Type == EnumMenuType.Button)
                        .GroupBy(l => l.Location ?? "default")
                        .Select(l => new GetMenuQueryResultButtonLocation
                        {
                            Location = l.Key,
                            Buttons = l
                                .ToList()
                                .Adapt<List<GetMenuQueryResultButton>>()
                        })
                        .ToList(),
                    Fields = it
                        .Where(f => f.Type == EnumMenuType.Field)
                        .ToList()
                        .Adapt<List<GetMenuQueryResultField>>()
                })
                .ToList();
            return model;
        }
    }
}