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 items = await (from m in repMenu.AsQueryable().AsNoTracking()
                               join rm in repRoleMenu.AsQueryable().AsNoTracking() on m.Id equals rm.MenuId into rmg
                               from rmgi in rmg.DefaultIfEmpty()
                               join ur in repUserInfoRole.AsQueryable().AsNoTracking() on rmgi.RoleId equals ur.RoleId into urg
                               from urgi in urg.DefaultIfEmpty()
                               where m.ParentId == request.Id && (logier.Level == 999 || urgi.UserInfoId == logier.UserInfoId) && !m.IsDisabled
                               && (m.Type == EnumMenuType.Button || m.Type == EnumMenuType.Field)
                               select m).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;
        }
    }
}