using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Bowin.Common.Linq.Entity;
using EMIS.ViewModel.EducationManage;
using EMIS.ViewModel;
using System.Linq.Expressions;
using EMIS.Entities;
using EMIS.DataLogic.EducationManage;
using EMIS.CommonLogic.SchedulingManage.ScheduleApproval;
using EMIS.Utility.FormValidate;
using EMIS.ViewModel.EducationSchedule;
using EMIS.ViewModel.SchedulingManage.ScheduleApproval; 

namespace EMIS.CommonLogic.EducationManage
{
    public class EducationSchedulingClassServices : BaseServices, IEducationSchedulingClassServices
    {
        public EducationSchedulingClassDAL EducationSchedulingClassDAL { get; set; }
        public Lazy<ICollegeScheduleApprovalServices> CollegeScheduleApprovalServices { get; set; }

        /// <summary>
        /// 获取完整结构的任务班视图的方法，主要是要组合教师列表和上课周列表
        /// </summary>
        /// <param name="configuretView"></param>
        /// <param name="exp"></param>
        /// <param name="resultExp"></param>
        /// <param name="dataRangeFunc"></param>
        /// <param name="pageIndex"></param>
        /// <param name="pageSize"></param>
        /// <returns></returns>
        public IGridResultSet<EducationSchedulingClassScheduleView> GetEducationSchedulingClassView(ConfiguretView configuretView,
            Expression<Func<EM_EducationSchedulingClass, bool>> exp,
            Expression<Func<EducationSchedulingClassScheduleView, bool>> resultExp = null,
            Func<IQueryable<EducationSchedulingClassScheduleView>, Expression<Func<EducationSchedulingClassScheduleView, Guid?>>,
                IQueryable<EducationSchedulingClassScheduleView>> dataRangeFunc = null, 
            int? pageIndex = null, int? pageSize = null)
        {
            var educationSchedulingClassViewQueryable = EducationSchedulingClassDAL.GetEducationSchedulingClassViewQueryable(exp);
            var classMajorQueryable = EducationSchedulingClassDAL.GetClassmajorQueryable(exp);
            var teacherViewQueryable = EducationSchedulingClassDAL.GetTeacherViewQueryable(exp);
            var educationMissionClassSettingQueryable = EducationSchedulingClassDAL.GetEducationMissionClassSettingQueryable(exp);
            var courseProcessQueryable = EducationSchedulingClassDAL.GetCourseProcessViewQueryable(exp);
            var courseProcessTeacherQueryable = this.EducationSchedulingClassDAL.GetCourseProcessTeacherViewQueryable(exp);

            if (resultExp != null)
            {
                educationSchedulingClassViewQueryable = educationSchedulingClassViewQueryable.Where(resultExp);
            }
            if (!string.IsNullOrEmpty(configuretView.ConditionValue))
            {
                educationSchedulingClassViewQueryable = educationSchedulingClassViewQueryable
                    .DynamicWhere(configuretView.Attribute, configuretView.Condition, configuretView.ConditionValue);
            }
            if (dataRangeFunc != null)
            {
                educationSchedulingClassViewQueryable = dataRangeFunc
                    .Invoke(educationSchedulingClassViewQueryable, null);
            }

            IGridResultSet<EducationSchedulingClassScheduleView> result;
            List<EducationMissionClassTeacherListView> teacherViewList;
            List<EM_EducationMissionClassSettings> educationMissionClassSettingList;
            List<EducationMissionClassContainClassView> classMajorList;
            List<CourseProcessView> courseProcessList;

            var startStatus = CollegeScheduleApprovalServices.Value.GetStartStatus();
            var collegeScheduleApprovalViewList = new List<CollegeScheduleApprovalView>();
            
            if (pageIndex.HasValue && pageSize.HasValue)
            {
                result = educationSchedulingClassViewQueryable.OrderBy(x => x.EducationMissionClassOrderNo)
                    .ToGridResultSet(pageIndex, pageSize);
                //var isCanApprove = CollegeScheduleApprovalServices.Value.IsCanApprove(collegeStatus.CollegeScheduleStatusID, CustomPrincipal.Current.UserID);
                collegeScheduleApprovalViewList = CollegeScheduleApprovalServices.Value.GetCollegeScheduleApprovalViewList(
                    result.rows.GroupBy(x => new { x.CourseCollegeID, x.SchoolYearID })
                    .Select(x => new CollegeSchoolyearView { CollegeID = x.Key.CourseCollegeID.Value, SchoolyearID = x.Key.SchoolYearID.Value }).ToList()
                    );
                //由于分页后数据量较少，可以考虑用Contains方法在数据库端筛选一下，不分页的情况就不要了
                var educationMissionClassIDList = result.rows.Select(x => x.EducationMissionClassID).ToList();

                teacherViewList = teacherViewQueryable.Where(x => educationMissionClassIDList.Contains(x.EducationMissionClassID)).ToList();
                classMajorList = classMajorQueryable.Where(x => educationMissionClassIDList.Contains(x.EducationMissionClassID)).ToList();
                educationMissionClassSettingList = educationMissionClassSettingQueryable
                    .Where(x => educationMissionClassIDList.Contains(x.EducationMissionClassID)).ToList();
                courseProcessList = courseProcessQueryable.Where(x => educationMissionClassIDList.Contains(x.EducationMissionClassID)).ToList();
                var courseProcessTeacherViewList = courseProcessTeacherQueryable.Where(x => educationMissionClassIDList.Contains(x.EducationMissionClassID)).Distinct().ToList();
                courseProcessList.ForEach(x => x.CourseProcessTeacherViewList = courseProcessTeacherViewList.Where(w => w.CourseProcessID == x.CourseProcessID)
                                                .OrderBy(w => w.TeachingMethod).ThenBy(w => w.Name).ToList());
            }
            else
            {
                var list = educationSchedulingClassViewQueryable.ToList();

                result = new GridResultSet<EducationSchedulingClassScheduleView>() { rows = list, total = list.Count };
                collegeScheduleApprovalViewList = CollegeScheduleApprovalServices.Value.GetCollegeScheduleApprovalViewList(
                    result.rows.GroupBy(x => new { x.CourseCollegeID, x.SchoolYearID })
                    .Select(x => new CollegeSchoolyearView { CollegeID = x.Key.CourseCollegeID.Value, SchoolyearID = x.Key.SchoolYearID.Value }).ToList()
                    );
                teacherViewList = teacherViewQueryable.ToList();
                classMajorList = classMajorQueryable.ToList();
                educationMissionClassSettingList = educationMissionClassSettingQueryable.ToList();
                courseProcessList = courseProcessQueryable.ToList();
                var courseProcessTeacherViewList = courseProcessTeacherQueryable.Distinct().ToList();
                courseProcessList.ForEach(x => x.CourseProcessTeacherViewList = courseProcessTeacherViewList.Where(w => w.CourseProcessID == x.CourseProcessID)
                                                .OrderBy(w => w.TeachingMethod).ThenBy(w => w.Name).ToList());
            }

            var submitedCollegeScheduleApprovalViewList = collegeScheduleApprovalViewList.Where(x => x.CollegeScheduleStatusID.HasValue).ToList();

            result.rows.ForEach(x =>
            {
                var collegeScheduleApprovalView = submitedCollegeScheduleApprovalViewList.FirstOrDefault(w => w.CollegeID == x.CourseCollegeID && w.SchoolyearID == x.SchoolYearID);
                
                x.TeacherTeachingViewList = teacherViewList
                    .Where(w => x.EducationMissionClassID == w.EducationMissionClassID)
                    .Select(w => (BaseTeacherTeachingView)w)
                    .OrderBy(w => w.TeachingMethod).ThenBy(w => w.Name).ToList();
                x.WeeklyNumList = educationMissionClassSettingList.Where(w => x.EducationMissionClassID == w.EducationMissionClassID)
                                        .Select(w => w.WeeklyNum).Distinct().ToList();
                x.ClassMajorIDList = classMajorList.Where(w => x.EducationMissionClassID == w.EducationMissionClassID)
                                        .Select(w => w.ClassMajor.ClassmajorID).Distinct().ToList();
                x.CourseProcessViewList = courseProcessList.Where(w => x.EducationMissionClassID == w.EducationMissionClassID).ToList();
                x.IsCanEdit = x.IsCanEdit && (collegeScheduleApprovalView == null || collegeScheduleApprovalView.RecordStatus == startStatus);
            });

            return result;
        }

        public List<EducationSchedulingClassScheduleView> GetEducationSchedulingClassViewList(Guid schoolYearID, IList<Guid?> collegeIDList)
        {
            return this.GetEducationSchedulingClassView(new ConfiguretView(),
                (x => collegeIDList.Contains(x.EM_EducationMissionClass.EM_EducationMission.CF_Department.CollegeID) 
                    && x.EM_EducationMissionClass.EM_EducationMission.SchoolyearID == schoolYearID
                    && x.EM_EducationMissionClass.RecordStatus != (int)EM_EducationMissionClassStatus.NotSubmitted
                    )).rows;
        }

        public List<EducationSchedulingClassStudentView> GetEducationSchedulingClassStudentViewList(Guid schoolYearID, IList<Guid?> collegeIDList)
        {
            return EducationSchedulingClassDAL.GetEducationSchedulingClassStudentViewQueryable((x => collegeIDList.Contains(x.EM_EducationMissionClass.EM_EducationMission.CF_Department.CollegeID)
                    && x.EM_EducationMissionClass.EM_EducationMission.SchoolyearID == schoolYearID
                    && x.EM_EducationMissionClass.RecordStatus != (int)EM_EducationMissionClassStatus.NotSubmitted
                    )).ToList();
        }

        public List<EducationSchedulingClassScheduleView> GetEducationSchedulingClassViewList(Guid schoolYearID, Guid classMajorID)
        {
            return this.GetEducationSchedulingClassView(new ConfiguretView(), 
                (x => x.EM_EducationMissionClass.CF_Classmajor.Any(w => w.ClassmajorID == classMajorID)
                    && x.EM_EducationMissionClass.EM_EducationMission.SchoolyearID == schoolYearID 
                    && x.EM_EducationMissionClass.RecordStatus != (int)EM_EducationMissionClassStatus.NotSubmitted), null,
                    this.GetQueryByDataRangeByDepartment).rows;
        }

        public List<EducationSchedulingClassScheduleView> GetDepartmentEducationSchedulingClassViewList(Guid schoolYearID, Guid departmentID, IList<int?> handleModeList)
        {
            return this.GetEducationSchedulingClassView(new ConfiguretView(),
                (x => x.EM_EducationMissionClass.EM_EducationMission.DepartmentID == departmentID
                    && x.EM_EducationMissionClass.EM_EducationMission.SchoolyearID == schoolYearID
                    && handleModeList.Contains(x.EM_EducationMissionClass.HandleModeID) 
                    && x.EM_EducationMissionClass.RecordStatus != (int)EM_EducationMissionClassStatus.NotSubmitted), null,
                    this.GetQueryByDataRangeByDepartment).rows;
        }


        public EducationSchedulingClassScheduleView GetEducationSchedulingClassView(Guid educationSchedulingClassID)
        {
            return this.GetEducationSchedulingClassView(new ConfiguretView(), 
                (x => x.EducationSchedulingClassID == educationSchedulingClassID)).rows.FirstOrDefault();
        }
    }
}