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.CommonLogic.SystemServices;
using EMIS.Entities;
using EMIS.DataLogic.ScoreManage;
using EMIS.ViewModel;
using EMIS.CommonLogic.CalendarManage;
using EMIS.Utility.FormValidate;

namespace EMIS.CommonLogic.ScoreManage
{
    public class ExaminationExemptionServices : BaseWorkflowServices<ER_ExaminationExemption>, IExaminationExemptionServices
    {
        public ExaminationExemptionDAL ExaminationExemptionDAL { get; set; }
        public FinalExaminationDAL FinalExaminationDAL { get; set; }

        public Lazy<IScoreServices> ScoreServices { get; set; }

        public Bowin.Common.Linq.Entity.IGridResultSet<ViewModel.ScoreManage.ExaminationExemptionView> GetExaminationExemptionGridView(
            ViewModel.ConfiguretView conditions, Guid? schoolyearID, Guid? collegeID, int? year, int? standardID, Guid? classmajorID,
            int? examsCatagoryID, int? recordStatus,int? learningformID, int? education,string LearnSystem, int? pageIndex = null, int? pageSize = null)
        {
            var statusList = this.GetStatusViewList();
            Expression<Func<ER_ExaminationExemption, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE);
            var startStatus = this.GetStartStatus();
            var userID = CustomPrincipal.Current.UserID;
            exp = exp.And(x => x.RecordStatus != startStatus || (x.RecordStatus == startStatus && x.CreateUserID == userID));
            if (schoolyearID.HasValue)
            {
                exp = exp.And(x => x.SchoolyearID == schoolyearID);
            }
            if (collegeID.HasValue)
            {
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.CF_Facultymajor.CollegeID == collegeID);
            }
            if (year.HasValue)
            {
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.GradeID == year);
            }
            if (standardID.HasValue)
            {
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.CF_Facultymajor.StandardID == standardID);
            }
            if (classmajorID.HasValue)
            {
                exp = exp.And(x => x.CF_Student.ClassmajorID == classmajorID);
            }
            if (examsCatagoryID.HasValue)
            {
                exp = exp.And(x => x.ExamsCategoryID == examsCatagoryID);
            }
            if (recordStatus.HasValue)
            {
                exp = exp.And(x => x.RecordStatus == recordStatus);
            }
            if (learningformID.HasValue)
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.CF_Facultymajor.LearningformID == learningformID);
            if (!string.IsNullOrEmpty(LearnSystem) && LearnSystem != "-1")
            {
                var LearnSystems = Convert.ToDecimal(LearnSystem);
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.CF_Facultymajor.LearnSystem == LearnSystems);
            }
            if (education.HasValue)
            {
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.CF_Facultymajor.EducationID == education.Value);
            }
            var query = this.ExaminationExemptionDAL.GetExaminationExemptionViewQueryable(exp);
            if (!string.IsNullOrEmpty(conditions.ConditionValue))
            {
                query = query.DynamicWhere(conditions.Attribute, conditions.Condition, conditions.ConditionValue);
            }
            query = this.GetQueryByDataRangeByCollege(query);

            var result = query.OrderByDescending(x => x.CreateTime).ThenBy(x => x.Year).ThenBy(x => x.StandardID).ToGridResultSet(pageIndex, pageSize);

            result.rows.ForEach(x =>
            {
                var currentStatus = statusList.FirstOrDefault(w => w.ID == x.RecordStatus);
                if (currentStatus != null)
                {
                    x.RecordStatusName = currentStatus.Name;
                }
                else
                {
                    x.RecordStatusName = "";
                }
            });

            return result;
        }

        public Bowin.Common.Linq.Entity.IGridResultSet<ViewModel.ScoreManage.ExaminationExemptionView> GetExaminationExemptionStudentGridView(
            ViewModel.ConfiguretView conditions, Guid? userID = null, int? pageIndex = null, int? pageSize = null)
        {
            Expression<Func<ER_ExaminationExemption, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE);
            var statusList = this.GetStatusViewList();

            if (userID.HasValue)
            {
                exp = exp.And(x => x.UserID == userID);
            }
            var query = this.ExaminationExemptionDAL.GetExaminationExemptionViewQueryable(exp);
            if (!string.IsNullOrEmpty(conditions.ConditionValue))
            {
                query = query.DynamicWhere(conditions.Attribute, conditions.Condition, conditions.ConditionValue);
            }

            var result = query.OrderByDescending(x => x.CreateTime).ThenBy(x => x.Year).ThenBy(x => x.StandardID).ToGridResultSet(pageIndex, pageSize);

            result.rows.ForEach(x =>
            {
                var currentStatus = statusList.FirstOrDefault(w => w.ID == x.RecordStatus);
                if (currentStatus != null)
                {
                    x.RecordStatusName = currentStatus.Name;
                }
                else
                {
                    x.RecordStatusName = "";
                }
            });

            return result;
        }

        public List<ViewModel.ScoreManage.ExaminationExemptionView> GetExaminationExemptionViewList(ViewModel.ConfiguretView conditions,
            Guid? schoolyearID, Guid? collegeID, int? year, int? standardID, Guid? classmajorID, int? examsCatagoryID, int? recordStatus,int? learningformID, int? education,string LearnSystem)
        {
            var statusList = this.GetStatusViewList();
            Expression<Func<ER_ExaminationExemption, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE);
            var startStatus = this.GetStartStatus();

            exp = exp.And(x => x.RecordStatus != startStatus);
            if (schoolyearID.HasValue)
            {
                exp = exp.And(x => x.SchoolyearID == schoolyearID);
            }
            if (collegeID.HasValue)
            {
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.CF_Facultymajor.CollegeID == collegeID);
            }
            if (year.HasValue)
            {
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.GradeID == year);
            }
            if (standardID.HasValue)
            {
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.CF_Facultymajor.StandardID == standardID);
            }
            if (classmajorID.HasValue)
            {
                exp = exp.And(x => x.CF_Student.ClassmajorID == classmajorID);
            }
            if (examsCatagoryID.HasValue)
            {
                exp = exp.And(x => x.ExamsCategoryID == examsCatagoryID);
            }
            if (recordStatus.HasValue)
            {
                exp = exp.And(x => x.RecordStatus == recordStatus);
            }
            if (learningformID.HasValue)
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.CF_Facultymajor.LearningformID == learningformID);
            if (!string.IsNullOrEmpty(LearnSystem) && LearnSystem != "-1")
            {
                var LearnSystems = Convert.ToDecimal(LearnSystem);
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.CF_Facultymajor.LearnSystem == LearnSystems);
            }
            if (education.HasValue)
            {
                exp = exp.And(x => x.CF_Student.CF_Classmajor.CF_Grademajor.CF_Facultymajor.EducationID == education.Value);
            }
            var query = this.ExaminationExemptionDAL.GetExaminationExemptionViewQueryable(exp);
            if (!string.IsNullOrEmpty(conditions.ConditionValue))
            {
                query = query.DynamicWhere(conditions.Attribute, conditions.Condition, conditions.ConditionValue);
            }
            query = this.GetQueryByDataRangeByCollege(query);

            var result = query.OrderByDescending(x => x.CreateTime).ThenBy(x => x.Year).ThenBy(x => x.StandardID).ToList();

            result.ForEach(x =>
            {
                var currentStatus = statusList.FirstOrDefault(w => w.ID == x.RecordStatus);
                if (currentStatus != null)
                {
                    x.RecordStatusName = currentStatus.Name;
                }
                else
                {
                    x.RecordStatusName = "";
                }
            });

            return result;
        }

        public List<ViewModel.ScoreManage.ExaminationExemptionView> GetExaminationExemptionViewStudentList(ViewModel.ConfiguretView conditions,
            Guid? userID)
        {
            Expression<Func<ER_ExaminationExemption, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE);
            var statusList = this.GetStatusViewList();

            if (userID.HasValue)
            {
                exp = exp.And(x => x.UserID == userID);
            }
            var query = this.ExaminationExemptionDAL.GetExaminationExemptionViewQueryable(exp);
            if (!string.IsNullOrEmpty(conditions.ConditionValue))
            {
                query = query.DynamicWhere(conditions.Attribute, conditions.Condition, conditions.ConditionValue);
            }

            var result = query.OrderByDescending(x => x.CreateTime).ThenBy(x => x.Year).ThenBy(x => x.StandardID).ToList();

            result.ForEach(x =>
            {
                var currentStatus = statusList.FirstOrDefault(w => w.ID == x.RecordStatus);
                if (currentStatus != null)
                {
                    x.RecordStatusName = currentStatus.Name;
                }
                else
                {
                    x.RecordStatusName = "";
                }
            });

            return result;
        }

        public EMIS.ViewModel.ScoreManage.ExaminationExemptionView GetExaminationExemptionView(Guid examinationExemptionID)
        {
            var statusList = this.GetStatusViewList();
            var examinationExemptionView = this.ExaminationExemptionDAL.GetExaminationExemptionViewQueryable(x => x.ExaminationExemptionID == examinationExemptionID)
                                               .FirstOrDefault();

            if (examinationExemptionView != null)
            {
                var recordStatus = statusList.FirstOrDefault(x => x.ID == examinationExemptionView.RecordStatus);
                if (recordStatus != null)
                {
                    examinationExemptionView.RecordStatusName = recordStatus.Name;
                }
            }

            return examinationExemptionView;
        }

        public void Save(ViewModel.ScoreManage.ExaminationExemptionView examinationExemptionView)
        {
            var dupExemption = this.ExaminationExemptionDAL.ExaminationExemptionRepository
                .GetSingle(x => x.UserID == examinationExemptionView.UserID && x.SchoolyearID == examinationExemptionView.SchoolyearID
                    && x.CoursematerialID == examinationExemptionView.CoursematerialID && x.ExamsCategoryID == examinationExemptionView.ExamsCategoryID);

            ER_ExaminationExemption examinationExemption = this.ExaminationExemptionDAL.ExaminationExemptionRepository
                .GetSingle(x => x.ExaminationExemptionID == examinationExemptionView.ExaminationExemptionID);

            if (examinationExemption == null)
            {
                if (dupExemption != null)
                {
                    throw new Exception("该科目在这个学期已经申请过免考，请勿重复申请。");
                }

                examinationExemption = new ER_ExaminationExemption();
                examinationExemption.ExaminationExemptionID = Guid.NewGuid();
                this.SetNewStatus(examinationExemption);
                examinationExemption.RecordStatus = this.GetStartStatus();
                this.UnitOfWork.Add(examinationExemption);
            }
            else
            {
                if (dupExemption != null && dupExemption.ExaminationExemptionID != examinationExemption.ExaminationExemptionID)
                {
                    throw new Exception("该科目在这个学期已经申请过免考，请勿重复申请。");
                }
                this.SetModifyStatus(examinationExemption);
            }

            examinationExemption.UserID = examinationExemptionView.UserID;
            examinationExemption.SchoolyearID = examinationExemptionView.SchoolyearID;
            examinationExemption.CoursematerialID = examinationExemptionView.CoursematerialID;
            examinationExemption.ExamsCategoryID = examinationExemptionView.ExamsCategoryID;
            examinationExemption.Reason = examinationExemptionView.Reason;

            this.UnitOfWork.Commit();
        }

        public void Delete(IList<Guid> examinationExemptionIDList)
        {
            this.UnitOfWork.Remove<ER_ExaminationExemption>(x => examinationExemptionIDList.Contains(x.ExaminationExemptionID));
            this.UnitOfWork.Commit();
        }

        public IGridResultSet<ViewModel.ScoreManage.ExaminationExemptionCoursematerialView> GetExaminationExemptionCoursematerialGridView(
            ConfiguretView conditions, int? pageIndex = null, int? pageSize = null)
        {
            var userID = CustomPrincipal.Current.UserID;
            Expression<Func<EMIS.Entities.CF_Schoolyear, bool>> schoolyearExp = (x => x.IsCurrent == true);
            Expression<Func<EMIS.Entities.CF_Student, bool>> studentExp = (x => x.UserID == userID);
            

            var query = this.ExaminationExemptionDAL.GetExaminationExemptionCoursematerialViewQueryable(schoolyearExp, studentExp);
            if (!string.IsNullOrEmpty(conditions.ConditionValue))
            {
                query = query.DynamicWhere(conditions.Attribute, conditions.Condition, conditions.ConditionValue);
            }

            var result = query.OrderBy(x => x.CourseCode.Length).ThenBy(x => x.CourseCode).ThenBy(x => x.CourseName).ToGridResultSet(pageIndex, pageSize);

            return result;
        }
        public IGridResultSet<ViewModel.ScoreManage.ExaminationExemptionCoursematerialView> GetExaminationExemptionCoursematerialGridViewForTeacher(
           ConfiguretView conditions,Guid? UserID, int? pageIndex = null, int? pageSize = null)
        {
            
            Expression<Func<EMIS.Entities.CF_Schoolyear, bool>> schoolyearExp = (x => x.IsCurrent == true);
            Expression<Func<EMIS.Entities.CF_Student, bool>> studentExp = (x => true);
            if (UserID.HasValue)
            {
                studentExp = (x => x.UserID == UserID);
            }
            var query = this.ExaminationExemptionDAL.GetExaminationExemptionCoursematerialViewQueryable(schoolyearExp, studentExp);
            if (!string.IsNullOrEmpty(conditions.ConditionValue))
            {
                query = query.DynamicWhere(conditions.Attribute, conditions.Condition, conditions.ConditionValue);
            }

            var result = query.OrderBy(x => x.CourseCode.Length).ThenBy(x => x.CourseCode).ThenBy(x => x.CourseName).ToGridResultSet(pageIndex, pageSize);

            return result;
        }
        public void OnApproveEnd(List<Guid> examinationExemptionIDList, Guid? userID)
        {
            ScoreServices.Value.RefreshExaminationExemptionState(examinationExemptionIDList);
        }
        public void OnRollback(List<Guid> examinationExemptionIDList, Guid? userID)
        {
            ScoreServices.Value.RefreshCancelExaminationExemptionState(examinationExemptionIDList);
        }
        public List<ViewModel.ScoreManage.ExaminationExemptionView> GetExaminationExemptionViewListByFinalExamination(Guid? finalExaminationID)
        {
            var endStatus = this.GetCorrectEndStatus();
            var finalExaminationView = FinalExaminationDAL.GetFinalExaminationViewQueryable(x => x.FinalExaminationID == finalExaminationID).FirstOrDefault();
            if (finalExaminationView == null)
            {
                return new List<ViewModel.ScoreManage.ExaminationExemptionView>();
            }
            Expression<Func<ER_ExaminationExemption, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE
                && x.SchoolyearID == finalExaminationView.SchoolyearID && x.CoursematerialID == finalExaminationView.CoursematerialID
                && x.ExamsCategoryID == finalExaminationView.ExamsCategoryID && x.RecordStatus == 3);
            var statusList = this.GetStatusViewList();

            var query = this.ExaminationExemptionDAL.GetExaminationExemptionViewQueryable(exp);

            var result = query.OrderByDescending(x => x.CreateTime).ThenBy(x => x.Year).ThenBy(x => x.StandardID).ToList();

            result.ForEach(x =>
            {
                var currentStatus = statusList.FirstOrDefault(w => w.ID == x.RecordStatus);
                if (currentStatus != null)
                {
                    x.RecordStatusName = currentStatus.Name;
                }
                else
                {
                    x.RecordStatusName = "";
                }
            });

            return result;
        }


        public void Cancel(List<Guid> examinationExemptionIDList, Guid userID, string comment)
        {
            var endStatusID = GetEndStatusID();
            var examinationExemptionList = ExaminationExemptionDAL.ExaminationExemptionRepository
                .GetList(x => examinationExemptionIDList.Contains(x.ExaminationExemptionID)).ToList();

            if (examinationExemptionList.Any(x => x.RecordStatus != endStatusID))
            {
                throw new Exception("只能撤回已通过状态的记录。");
            }

            var actionViewList = this.GetActionView(examinationExemptionIDList[0], userID);
            var actionView = actionViewList.FirstOrDefault();

            this.Approve(examinationExemptionIDList, userID, actionView.ActionID, comment);
        }

        public int? GetEndStatusID()
        {
            var endStatus = this.GetStatusViewList().FirstOrDefault(x => x.Description.Contains("[End]"));
            if (endStatus != null)
            {
                return endStatus.ID;
            }
            else
            {
                return null;
            }
        }
    }
}