using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EMIS.DataLogic.Repositories;
using EMIS.Entities;
using EMIS.ViewModel;

namespace EMIS.DataLogic.SystemDAL
{
    public class ContextMenuDAL
    {
        public RoleRepository RoleRepository { get; set; }
        public UserRepository UserRepository { get; set; }
        public ContextMenuRepository ContextMenuRepository { get; set; }

        /// <summary>
        /// 根据对应的条件查询相应页面的权限信息
        /// </summary>
        /// <param name="menuNo"></param>
        /// <param name="formClass"></param>
        /// <param name="userID"></param>
        /// <param name="roleID"></param>
        /// <returns></returns>
        public IQueryable<Sys_ContextMenu> GetContextMenuListByUserAndRoleID(string menuNo, string formClass, Guid userID, Guid? roleID)
        {
            var query = from cm in ContextMenuRepository.GetList(x => x.RecordStatus >= (int)SYS_STATUS.USABLE)
                        from tr in cm.Sys_FunctionCode.Sys_Role.Where(x => x.RecordStatus >= (int)SYS_STATUS.USABLE).DefaultIfEmpty()
                        from ur in tr.Sys_User.DefaultIfEmpty()
                        where 
                        (cm.FunctionCode == null || !cm.IsNeedPrivilege || (((ur != null) ? ur.UserID : Guid.Empty) == userID 
                        && (roleID == null || tr.RoleID == roleID)))
                        && cm.MenuNo == menuNo 
                        && cm.FormClass == formClass
                        select cm;

            return query.Distinct();
        }
    }
}