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

namespace EMIS.DataLogic.MinorManage.MinorApply
{
    public class StudentMinorDAL
    {
        public StudentMinorRegistRepository studentMinorRegistRepository { get; set; }
        public UserRepository userRepository { get; set; }
        public GrademinorRepository grademinorRepository { get; set; }
        public CollegeRepository collegeRepository { get; set; }
        public DictionaryItemRepository dictionaryItemRepository { get; set; }
        public ClassminorStudentRepository classminorStudentRepository { get; set; }
        public ClassminorRepository classminorRepository { get; set; }

        public IQueryable<StudentMinorView> GetStudentMinorViewQueryable(Expression<Func<EM_StudentMinorRegist, bool>> exp)
        {
            var query = from smrr in studentMinorRegistRepository.GetList(exp)
                        join user in userRepository.Entities
                        on smrr.UserID equals user.UserID
                        join gra in grademinorRepository.Entities
                        on smrr.GrademinorID equals gra.GrademinorID
                        join dic in dictionaryItemRepository.GetList(x => x.DictionaryCode == "CF_Standard")
                        on gra.StandardID equals dic.Value  
                        join col in collegeRepository.Entities
                        on gra.CollegeID equals col.CollegeID
                        select new StudentMinorView
                        {
                            StudentMinorRegistID = smrr.StudentMinorRegistID,
                            UserID = smrr.UserID,
                            UserName = user.Name,
                            LoginID = user.LoginID,
                            GradeYearID = gra.YearID,
                            CollegeID = gra.CollegeID,
                            CollegeCode = col.No,
                            CollegeName = col.Name,
                            GrademinorID = gra.GrademinorID,
                            GrademinorCode = dic.Code,
                            GrademinorName = dic.Name,
                            RecordStatus = smrr.RecordStatus,
                        };
            return query;
        }

        public Guid? GetGrademinorIDByUserID(Guid userID)
        {
            var query = from csr in classminorStudentRepository.GetList(x => x.UserID == userID)
                        join cr in classminorRepository.Entities
                        on csr.ClassminorID equals cr.ClassminorID
                        select new
                        {
                            GrademinorID = cr.GrademinorID
                        };
            if (query.FirstOrDefault() != null)
            {
                return query.FirstOrDefault().GrademinorID;
            }
            return null;
        }
    }
}