using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using Bowin.Common.Linq;
using EMIS.DataLogic.SystemDAL;
using EMIS.Entities;
using EMIS.ViewModel;

namespace EMIS.CommonLogic.SystemServices
{
    public class MenuServices : BaseServices, IMenuServices
    {
        public MenuDAL MenuDAL { get; set; }

        public IList<Sys_Menu> GetMenuByUserIDAndRoleID(Guid userID, Guid? roleID)
        {
            Expression<Func<Sys_Menu, bool>> menuDefineExp = (x => x.RecordStatus >= (int)SYS_STATUS.USABLE);
            Expression<Func<Sys_User, bool>> userExp = (x => x.UserID == userID);

            if (roleID.HasValue)
            {
                menuDefineExp = menuDefineExp.And(x => x.FunctionCode == null || x.Sys_FunctionCode.Sys_Role.Any(w => w.RoleID == roleID.Value));
            }

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

        public string GetFullMenuPath(string menuNo)
        {
            var menu = MenuDAL.MenuRepository.GetSingle(x => x.MenuNo == menuNo);
            var menuList = MenuDAL.MenuRepository.Entities.ToList();

            return this.GetParentMenuName(menu, menuList);
        }

        private string GetParentMenuName(Sys_Menu menu, IList<Sys_Menu> menuList)
        {
            if (menu != null)
            {
                if ((menu.ParentMenuNo ?? "") != "")
                {
                    var parentMenu = menuList.Where(x => x.MenuNo == menu.ParentMenuNo).FirstOrDefault();

                    return this.GetParentMenuName(parentMenu, menuList) + " -> " + menu.MenuName;
                }

                return menu.MenuName;
            }
            else
            {
                return "";
            }
        }
    }
}