using Bowin.Common.Linq;
using YLShipBuildLandMap.Entity;
using YLShipBuildLandMap.Entity.ViewModel;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;

namespace YLShipBuildLandMap.Services.SystemSetting
{
    public class MenuService : IMenuService
    {
        private YLShipBuildLandMapContext DbContext { get; set; }

        public MenuService(YLShipBuildLandMapContext dbContext)
        {
            DbContext = dbContext;
        }

        private IQueryable<SysMenu> GetMenuByUser(
            Expression<Func<SysMenu, bool>> menuDefineExp,
            Expression<Func<SysUser, bool>> userExp)
        {
            var userFunc = userExp;
            var menuDefineFunc = menuDefineExp;

            var iqResult = (
                from m in this.DbContext.SysMenu.Where(menuDefineExp)
                where m.FunctionCode == null || (
                    from u in this.DbContext.SysUser.Where(userExp)
                    from r in u.SysUserSysRole
                    from f in r.Role.SysRoleSysFunctionCode
                    where f.FunctionCode == m.FunctionCode
                    select 1
                ).Any()
                select m
                );

            return iqResult.OrderBy(x => x.OrderNo).ThenBy(x => x.MenuNo);
        }

        public List<SysMenu> GetMenuByUserID(Guid userID)
        {
            Expression<Func<SysMenu, bool>> menuDefineExp = (x => x.RecordStatus >= 1);
            Expression<Func<SysUser, bool>> userExp = (x => x.UserId == userID);

            return GetMenuByUser(menuDefineExp, userExp).ToList();
        }
    }
}