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

namespace EMIS.DataLogic.EducationSchedule
{
    public class TeacherScheduleDAL
    {
        public TeacherScheduleSettingRepository TeacherScheduleSettingRepository { get; set; }
        public EducationSchedulingRepository EducationSchedulingRepository { get; set; }
        public StaffRepository StaffRepository { get; set; }

        public IQueryable<TeacherWorkTimeView> GetTeacherWorkTimeView(Expression<Func<ES_EducationScheduling, bool>> schedulingExp,
            Expression<Func<CF_Staff, bool>> staffExp)
        {
            var q = (from es in EducationSchedulingRepository.GetList(schedulingExp)
                     from s in es.ES_EducationSchedulingTeacher 
                     from eswn in es.ES_EducationSchedulingWeekNum.Where(x => x.WeekNum.HasValue)
                     group es by new { s.CF_Staff.UserID, Name = s.CF_Staff.Sys_User.Name, WeekNum = eswn.WeekNum } into g 
                     select new TeacherWorkTimeView 
                     {
                         UserID = g.Key.UserID,
                         Name = g.Key.Name,
                         WeekNum = g.Key.WeekNum ?? 0,
                         WorkTime = g.Sum(x => (x.EM_CoursesTime.EndTimes != null && x.EM_CoursesTime.StartTimes != null) ? (x.EM_CoursesTime.EndTimes - x.EM_CoursesTime.StartTimes + 1) : 0)
                     });

            return q;
        }
    }
}