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

namespace EMIS.DataLogic.SystemDAL
{
    public class RoleDAL
    {
        public RoleRepository RoleRepository { get; set; }
        public UserRepository UserRepository { get; set; }
        public DictionaryItemRepository DictionaryItemRepository { get; set; }

        public IQueryable<RoleView> GetRoleView(Expression<Func<Sys_Role, bool>> roleExpression)
        {
            var q = (from r in RoleRepository.GetList(roleExpression).OrderBy(c=>c.OrderNo).ThenBy(c=>c.TypeID)
                     join dit in DictionaryItemRepository.Entities
                        on new { DictionaryCode = typeof(SYS_RoleType).Name, Value = r.TypeID } equals new { dit.DictionaryCode, dit.Value }
                     join didr in DictionaryItemRepository.Entities
                        on new { DictionaryCode = typeof(SYS_DataRange).Name, Value = r.DefaultDataRange } equals new { didr.DictionaryCode, didr.Value } into ddidr 
                     from edidr in ddidr.DefaultIfEmpty() 
                     join dirs in DictionaryItemRepository.Entities
                        on new { DictionaryCode = typeof(SYS_STATUS).Name, Value = r.RecordStatus } equals new { dirs.DictionaryCode, dirs.Value }
                     join dist in DictionaryItemRepository.Entities
                        on new { DictionaryCode = typeof(CF_STUDENTTYPE).Name, Value = r.CF_StudentRole.StudentType } equals new { dist.DictionaryCode, dist.Value } into ddist 
                     from edist in ddist.DefaultIfEmpty()
                     join cu in UserRepository.Entities on r.CreateUserID equals cu.UserID into dcu 
                     from ecu in dcu.DefaultIfEmpty() 
                     join mu in UserRepository.Entities on r.ModifyUserID equals mu.UserID into dmu 
                     from emu in dmu.DefaultIfEmpty()
                     select new RoleView
                     {
                         OrderNo = r.OrderNo,
                         RoleID = r.RoleID,
                         TypeID = r.TypeID,
                         TypeDesc = dit.Name,
                         RoleName = r.RoleName,
                         Description = r.Description,
                         IsSystemRole = r.IsSystemRole,
                         SystemRoleType = r.SystemRoleType,
                         DefaultDataRange = r.DefaultDataRange,
                         DefaultDataRangeDesc = edidr.Name,
                         StudentType = r.CF_StudentRole.StudentType,
                         StudentTypeDesc = edist.Name,
                         RecordStatus = r.RecordStatus,
                         RecordStatusDesc = dirs.Name,
                         CreateUserID = r.CreateUserID,
                         CreateUserName = (ecu == null) ? null : ecu.Name,
                         CreateTime = r.CreateTime,
                         ModifyUserID = r.ModifyUserID,
                         ModifyUserName = (emu == null) ? null : emu.Name,
                         ModifyTime = r.ModifyTime
                     });

            return q;
        }
    }
}