using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Linq.Expressions;
using Bowin.Common.Linq;
using Bowin.Common.Linq.Entity;
using EMIS.DataLogic.UniversityManage.TeacherManage;
using EMIS.DataLogic.ExaminationManage;
using EMIS.Entities;
using EMIS.ViewModel;
using EMIS.ViewModel.UniversityManage.TeacherManage;
using EMIS.CommonLogic.EducationSchedule;

namespace EMIS.CommonLogic.ExaminationManage
{
    public class ExaminationTeacherServices : BaseServices, IExaminationTeacherServices
    {
        public StaffDAL StaffDAL { get; set; }
        public ExaminationTeacherDAL ExaminationTeacherDAL { get; set; }
        public ExaminationPlanDAL ExaminationPlanDAL { get; set; }

        public Lazy<IScheduleServices> ScheduleServices { get; set; }

        public IGridResultSet<StaffView> GetStaffViewList(ConfiguretView teacherView, 
            Guid? campusID, Guid? collegeID, Guid? departmentID, int pageIndex, int pageSize)
        {
            Expression<Func<CF_Staff, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE && x.EX_ExaminationTeacher.Count() > 0);

            if (campusID.HasValue)
            {
                exp = exp.And(x => x.CF_College.CampusID == campusID);
            }
            if (collegeID.HasValue)
            {
                exp = exp.And(x => x.CollegeID == collegeID);
            }
            if (departmentID.HasValue)
            {
                exp = exp.And(x => x.DepartmentID == departmentID);
            }

            var q = StaffDAL.GetStaffViewQueryable(exp);

            if (!string.IsNullOrEmpty(teacherView.ConditionValue) && !string.IsNullOrEmpty(teacherView.Attribute))
                q = q.DynamicWhere(teacherView.Attribute, teacherView.Condition, teacherView.ConditionValue);

            return GetQueryByDataRangeByCollege(q).OrderByDescending(x => x.CollegeName).ThenByDescending(x => x.IncumbencyState).ThenByDescending(x => x.Name)
                    .ToGridResultSet<StaffView>(pageIndex, pageSize);
        }

        public IList<StaffView> GetStaffViewList(ConfiguretView teacherView, Guid? campusID, Guid? collegeID, Guid? departmentID)
        {
            Expression<Func<CF_Staff, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE && x.EX_ExaminationTeacher.Count() > 0);

            if (campusID.HasValue)
            {
                exp = exp.And(x => x.CF_College.CampusID == campusID);
            }
            if (collegeID.HasValue)
            {
                exp = exp.And(x => x.CollegeID == collegeID);
            }
            if (departmentID.HasValue)
            {
                exp = exp.And(x => x.DepartmentID == departmentID);
            }

            var q = StaffDAL.GetStaffViewQueryable(exp);

            if (!string.IsNullOrEmpty(teacherView.ConditionValue) && !string.IsNullOrEmpty(teacherView.Attribute))
                q = q.DynamicWhere(teacherView.Attribute, teacherView.Condition, teacherView.ConditionValue);

            return GetQueryByDataRangeByCollege(q).OrderByDescending(x => x.CollegeName).ThenByDescending(x => x.IncumbencyState).ThenByDescending(x => x.Name)
                    .ToList();
        }

        public void Add(IList<Guid?> userIDList)
        {
            foreach (var userID in userIDList)
            {
                var examinationTeacherEntity = ExaminationTeacherDAL.ExaminationTeacherRepository.GetSingle(x => x.UserID == userID);
                if (examinationTeacherEntity == null)
                {
                    examinationTeacherEntity = new EX_ExaminationTeacher();
                    examinationTeacherEntity.ExaminationTeacherID = Guid.NewGuid();
                    examinationTeacherEntity.UserID = userID;

                    this.SetNewStatus(examinationTeacherEntity);

                    UnitOfWork.Add(examinationTeacherEntity);
                }
            }
            UnitOfWork.Commit();
        }

        public void Delete(IList<Guid?> userIDList)
        {
            if (userIDList.Count > 0)
            {
                UnitOfWork.Delete<EX_ExaminationTeacher>(x => userIDList.Contains(x.UserID));
            }
        }

        public IGridResultSet<StaffView> GetAvailableStaffViewList(ConfiguretView teacherView, Guid examinationPlanID, Guid classroomID, Guid? campusID, Guid? collegeID, 
            Guid? departmentID, int pageIndex, int pageSize)
        {
            Expression<Func<CF_Staff, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE && x.EX_ExaminationTeacher.Count() > 0);

            if (campusID.HasValue)
            {
                exp = exp.And(x => x.CF_College.CampusID == campusID);
            }
            if (collegeID.HasValue)
            {
                exp = exp.And(x => x.CollegeID == collegeID);
            }
            if (departmentID.HasValue)
            {
                exp = exp.And(x => x.DepartmentID == departmentID);
            }

            var examinationPlan = ExaminationPlanDAL.ExaminationPlanRepository.GetSingle(x => x.ExaminationPlanID == examinationPlanID);
            var scheduleDateTimeList = new List<StartEndTimeView> { 
                new StartEndTimeView { StartTime = examinationPlan.ExaminationDate.Value.Add(examinationPlan.StartTime.Value)
                    , EndTime = examinationPlan.ExaminationDate.Value.Add(examinationPlan.EndTime.Value) }
            };

            var schedulingList = this.ScheduleServices.Value.GetEducationSchedulingWeekNumViewForExaminationTeacher(examinationPlan.SchoolyearID.Value,
                scheduleDateTimeList);
            var scheduledTeacherIDList = schedulingList.SelectMany(x => x.TeacherList).Select(x => x.UserID).Distinct().ToList();

            exp = exp.And(x => !scheduledTeacherIDList.Contains(x.UserID));

            var q = ExaminationTeacherDAL.GetAvailableStaffView((x => x.ExaminationPlanID == examinationPlanID), classroomID, exp);

            if (!string.IsNullOrEmpty(teacherView.ConditionValue) && !string.IsNullOrEmpty(teacherView.Attribute))
                q = q.DynamicWhere(teacherView.Attribute, teacherView.Condition, teacherView.ConditionValue);

            return GetQueryByDataRangeByCollege(q).OrderByDescending(x => x.CollegeName).ThenByDescending(x => x.IncumbencyState).ThenByDescending(x => x.Name)
                    .ToGridResultSet<StaffView>(pageIndex, pageSize);
        }

        public IGridResultSet<StaffView> GetAddAvailableStaffViewList(ConfiguretView teacherView, Guid classroomID, Guid? campusID, Guid? collegeID,
            Guid? departmentID, int pageIndex, int pageSize)
        {
            Expression<Func<CF_Staff, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE && x.EX_ExaminationTeacher.Count() > 0);

            if (campusID.HasValue)
            {
                exp = exp.And(x => x.CF_College.CampusID == campusID);
            }
            if (collegeID.HasValue)
            {
                exp = exp.And(x => x.CollegeID == collegeID);
            }
            if (departmentID.HasValue)
            {
                exp = exp.And(x => x.DepartmentID == departmentID);
            }

            var q = ExaminationTeacherDAL.GetAvailableStaffView((x => true), classroomID, exp);

            if (!string.IsNullOrEmpty(teacherView.ConditionValue) && !string.IsNullOrEmpty(teacherView.Attribute))
                q = q.DynamicWhere(teacherView.Attribute, teacherView.Condition, teacherView.ConditionValue);

            return GetQueryByDataRangeByCollege(q).OrderByDescending(x => x.CollegeName).ThenByDescending(x => x.IncumbencyState).ThenByDescending(x => x.Name)
                    .ToGridResultSet<StaffView>(pageIndex, pageSize);
        }


        public IGridResultSet<StaffView> GetAvailableStaffViewGdssList(ConfiguretView teacherView, Guid schoolyearID, DateTime examinationDate, 
            TimeSpan startTime, TimeSpan endTime, Guid classroomID, Guid? campusID, Guid? collegeID, Guid? departmentID, int pageIndex, int pageSize)
        {
            Expression<Func<CF_Staff, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE && x.EX_ExaminationTeacher.Count() > 0);

            if (campusID.HasValue)
            {
                exp = exp.And(x => x.CF_College.CampusID == campusID);
            }
            if (collegeID.HasValue)
            {
                exp = exp.And(x => x.CollegeID == collegeID);
            }
            if (departmentID.HasValue)
            {
                exp = exp.And(x => x.DepartmentID == departmentID);
            }

            var scheduleDateTimeList = new List<StartEndTimeView> { 
                new StartEndTimeView { StartTime = examinationDate.Add(startTime)
                    , EndTime = examinationDate.Add(endTime) }
            };

            var schedulingList = this.ScheduleServices.Value.GetEducationSchedulingWeekNumViewForExaminationTeacher(schoolyearID,
                scheduleDateTimeList);
            var scheduledTeacherIDList = schedulingList.SelectMany(x => x.TeacherList).Select(x => x.UserID).Distinct().ToList();

            exp = exp.And(x => !scheduledTeacherIDList.Contains(x.UserID));

            var q = ExaminationTeacherDAL.GetAvailableStaffViewGdss((x => x.SchoolyearID == schoolyearID && x.ExaminationDate == examinationDate 
                && x.StartTime <= endTime && x.EndTime >= startTime), classroomID, exp);

            if (!string.IsNullOrEmpty(teacherView.ConditionValue) && !string.IsNullOrEmpty(teacherView.Attribute))
                q = q.DynamicWhere(teacherView.Attribute, teacherView.Condition, teacherView.ConditionValue);

            return GetQueryByDataRangeByCollege(q).OrderByDescending(x => x.CollegeName).ThenByDescending(x => x.IncumbencyState).ThenByDescending(x => x.Name)
                    .ToGridResultSet<StaffView>(pageIndex, pageSize);
        }
    }
}