using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using Bowin.Common.Linq;
using Bowin.Common.Linq.Entity;
using EMIS.Entities;
using EMIS.ViewModel;
using EMIS.ViewModel.StudentManage.StudentChange;
using EMIS.DataLogic.StudentManage.StudentChange;
using EMIS.CommonLogic.SystemServices;

namespace EMIS.CommonLogic.StudentWeb.Change
{
    public class StudentChangeServices : BaseWorkflowServices<CF_DifferentDynamic>, IStudentChangeServices
    {
        public Lazy<StudentChangeDAL> StudentChangeDAL { get; set; }

        /// <summary>
        /// 
        /// </summary>
        public StudentChangeServices()
        {
            
        }

        /// <summary>
        /// 查询学生异动申请信息View
        /// </summary>
        /// <param name="configuretView"></param>
        /// <param name="userID"></param>
        /// <param name="pageIndex"></param>
        /// <param name="pageSize"></param>
        /// <returns></returns>
        public IGridResultSet<StudentChangeView> GetStudentChangeViewGrid(ConfiguretView configuretView, Guid? userID, int pageIndex, int pageSize)
        {
            var applyStatusList = this.GetStatusViewList();
            Expression<Func<CF_DifferentDynamic, bool>> expStudentChange = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE);
            expStudentChange = expStudentChange.And(x => x.UserID == userID);
            var query = StudentChangeDAL.Value.GetStudentChangeViewQueryable(expStudentChange);

            //查询条件
            if (!string.IsNullOrEmpty(configuretView.ConditionValue))
            {
                query = query.DynamicWhere(configuretView.Attribute, configuretView.Condition, configuretView.ConditionValue.Trim());
            }
            var result = query.OrderByDescending(x => x.SchoolyearValue).ThenByDescending(x => x.ChangeDate).ToGridResultSet<StudentChangeView>(pageIndex, pageSize);
            result.rows.ForEach(x => x.ApprovalStatusName = applyStatusList.Where(w => w.ID == x.ApprovalStatus).Select(w => w.Name).FirstOrDefault());
            return result;
        }

        /// <summary>
        /// 查询学生异动申请信息List
        /// </summary>
        /// <param name="configuretView"></param>
        /// <param name="userID"></param>
        /// <returns></returns>
        public IList<StudentChangeView> GetStudentChangeViewList(ConfiguretView configuretView, Guid? userID)
        {
            var applyStatusList = this.GetStatusViewList();
            Expression<Func<CF_DifferentDynamic, bool>> expStudentChange = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE);
            expStudentChange = expStudentChange.And(x => x.UserID == userID);
            var query = StudentChangeDAL.Value.GetStudentChangeViewQueryable(expStudentChange);

            //查询条件
            if (!string.IsNullOrEmpty(configuretView.ConditionValue))
            {
                query = query.DynamicWhere(configuretView.Attribute, configuretView.Condition, configuretView.ConditionValue.Trim());
            }
            var result = query.OrderByDescending(x => x.SchoolyearValue).ThenByDescending(x => x.ChangeDate).ToList();
            result.ForEach(x => x.ApprovalStatusName = applyStatusList.Where(w => w.ID == x.ApprovalStatus).Select(w => w.Name).FirstOrDefault());
            return result;
        }

        /// <summary>
        /// 查询对应的学生异动信息View
        /// </summary>
        /// <param name="studentChangeID"></param>
        /// <returns></returns>
        public StudentChangeView GetStudentChangeView(Guid? studentChangeID)
        {
            try
            {
                Expression<Func<CF_DifferentDynamic, bool>> exp = (x => x.RecordStatus > (int)SYS_STATUS.UNUSABLE);
                exp = exp.And(x => x.StudentChangeID == studentChangeID);
                var query = StudentChangeDAL.Value.GetStudentChangeViewQueryable(exp).SingleOrDefault();
                return query;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 编辑
        /// </summary>
        /// <param name="studentChangeView"></param>
        public void StudentChangeEdit(StudentChangeView studentChangeView)
        {
            try
            {
                var workflowStatusViewList = this.GetStatusViewList();
                if (workflowStatusViewList == null || workflowStatusViewList.Count() <= 0)
                {
                    throw new Exception("数据有误，请联系辅导员或学籍异动负责老师。");
                }
                var startStatusID = this.GetStartStatus();
                if (startStatusID == null)
                {
                    throw new Exception("数据有误，请联系辅导员或学籍异动负责老师。");
                }
                var endStatusID = this.GetCorrectEndStatus();
                if (endStatusID == null)
                {
                    throw new Exception("数据有误，请联系辅导员或学籍异动负责老师。");
                }
                var approveStatusIDList = this.GetApproveStatusViewList().Select(x => x.ID).ToList();
                var applyStatusIDList = workflowStatusViewList.Where(x => x.ID != endStatusID && !approveStatusIDList.Contains(x.ID)).Select(x => x.ID).ToList();
                var studentChangeVerify = StudentChangeDAL.Value.StudentChangeRepository.GetList(x => x.StudentChangeID != studentChangeView.StudentChangeID
                        && x.UserID == studentChangeView.UserID && x.SchoolyearID == studentChangeView.SchoolyearID && x.ChangeTypeID == studentChangeView.ChangeTypeID).SingleOrDefault();
                if (studentChangeVerify == null)
                {
                    if (studentChangeView.StudentChangeID != Guid.Empty)
                    {
                        var studentChange = StudentChangeDAL.Value.StudentChangeRepository.GetList(x => x.StudentChangeID == studentChangeView.StudentChangeID).SingleOrDefault();
                        if (studentChange == null)
                        {
                            throw new Exception("数据有误，请联系辅导员或学籍异动负责老师。");
                        }
                        else
                        {
                            if (applyStatusIDList.Any(x => x == studentChange.ApprovalStatus))
                            {
                                studentChange.UserID = studentChangeView.UserID;
                                studentChange.SchoolyearID = studentChangeView.SchoolyearID;
                                studentChange.ChangeTypeID = studentChangeView.ChangeTypeID;
                                studentChange.BeforeClassmajorID = studentChangeView.BeforeClassmajorID;
                                studentChange.BeforeInSchoolStatusID = studentChangeView.BeforeInSchoolStatusID;
                                studentChange.BeforeStudentStatus = studentChangeView.BeforeStudentStatus;
                                studentChange.AfterClassmajorID = studentChangeView.AfterClassmajorID;
                                studentChange.AfterInSchoolStatusID = studentChangeView.AfterInSchoolStatusID;
                                studentChange.AfterStudentStatus = studentChangeView.AfterStudentStatus;
                                studentChange.ReturnSchoolyearID = studentChangeView.ReturnSchoolyearID;
                                studentChange.ChangeReasonID = studentChangeView.ChangeReasonID;
                                studentChange.ChangeDate = studentChangeView.ChangeDate;
                                studentChange.Description = studentChangeView.Description;
                                studentChange.Remark = studentChangeView.Remark;
                                SetModifyStatus(studentChange);
                            }
                            else
                            {
                                throw new Exception("只能修改未提交、已退回状态的信息，请核查。");
                            }
                        }
                    }
                    else
                    {
                        var newStudentChange = new CF_DifferentDynamic();
                        newStudentChange.StudentChangeID = Guid.NewGuid();
                        newStudentChange.UserID = studentChangeView.UserID;
                        newStudentChange.SchoolyearID = studentChangeView.SchoolyearID;
                        newStudentChange.ChangeTypeID = studentChangeView.ChangeTypeID;
                        newStudentChange.BeforeClassmajorID = studentChangeView.BeforeClassmajorID;
                        newStudentChange.BeforeInSchoolStatusID = studentChangeView.BeforeInSchoolStatusID;
                        newStudentChange.BeforeStudentStatus = studentChangeView.BeforeStudentStatus;
                        newStudentChange.AfterClassmajorID = studentChangeView.AfterClassmajorID;
                        newStudentChange.AfterInSchoolStatusID = studentChangeView.AfterInSchoolStatusID;
                        newStudentChange.AfterStudentStatus = studentChangeView.AfterStudentStatus;
                        newStudentChange.ReturnSchoolyearID = studentChangeView.ReturnSchoolyearID;
                        newStudentChange.ChangeApplyTypeID = (int)CF_ChangeApplyType.Normal;
                        newStudentChange.ChangeReasonID = studentChangeView.ChangeReasonID;
                        newStudentChange.ChangeDate = studentChangeView.ChangeDate;
                        newStudentChange.Description = studentChangeView.Description;
                        newStudentChange.ApprovalStatus = startStatusID;
                        newStudentChange.Remark = studentChangeView.Remark;
                        SetNewStatus(newStudentChange);
                        UnitOfWork.Add(newStudentChange);
                    }
                }
                else
                {
                    throw new Exception("已存在相同的异动申请信息，请核查。");
                }
                UnitOfWork.Commit();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="studentChangeIDs"></param>
        /// <returns></returns>
        public bool StudentChangeDelete(List<Guid?> studentChangeIDs)
        {
            try
            {
                var workflowStatusViewList = this.GetStatusViewList();
                if (workflowStatusViewList == null || workflowStatusViewList.Count() <= 0)
                {
                    throw new Exception("数据有误，请联系辅导员或学籍异动负责老师。");
                }
                var startStatusID = this.GetStartStatus();
                if (startStatusID == null)
                {
                    throw new Exception("数据有误，请联系辅导员或学籍异动负责老师。");
                }
                var endStatusID = this.GetCorrectEndStatus();
                if (endStatusID == null)
                {
                    throw new Exception("数据有误，请联系辅导员或学籍异动负责老师。");
                }
                var approveStatusIDList = this.GetApproveStatusViewList().Select(x => x.ID).ToList();
                var applyStatusIDList = workflowStatusViewList.Where(x => x.ID != endStatusID && !approveStatusIDList.Contains(x.ID)).Select(x => x.ID).ToList();
                var studentChangeList = StudentChangeDAL.Value.StudentChangeRepository.GetList(x => studentChangeIDs.Contains(x.StudentChangeID)).ToList();
                foreach (var studentChange in studentChangeList)
                {
                    if (!applyStatusIDList.Any(x => x == studentChange.ApprovalStatus))
                    {
                        throw new Exception("只能删除未提交、已退回状态的信息，请刷新页面再次尝试。");
                    }
                }
                UnitOfWork.Delete<CF_DifferentDynamic>(x => studentChangeIDs.Contains(x.StudentChangeID));
                return true;
            }
            catch (Exception)
            {
                throw;
            }
        }

        /// <summary>
        /// 提交
        /// </summary>
        /// <param name="studentChangeIDs"></param>
        /// <param name="userID"></param>
        /// <param name="comment"></param>
        /// <returns></returns>
        public string StudentChangeSubmit(List<Guid> studentChangeIDs, Guid userID, string comment = "")
        {
            try
            {
                var startStatusID = this.GetStartStatus();
                if (startStatusID == null)
                {
                    throw new Exception("数据有误，请联系辅导员或学籍异动负责老师。");
                }
                int success = 0;
                string tipMessage = null;
                var submitIDList = new List<Guid>();
                var approveIDList = new List<Guid>();
                var studentChangeList = StudentChangeDAL.Value.StudentChangeRepository.GetList(x => studentChangeIDs.Contains(x.StudentChangeID)).ToList();
                foreach (var studentChange in studentChangeList)
                {
                    if (!studentChange.SchoolyearID.HasValue)
                    {
                        throw new Exception("选择提交的数据存在异常（如：学年学期为空），请核查。");
                    }
                    if (!studentChange.ChangeTypeID.HasValue)
                    {
                        throw new Exception("选择提交的数据存在异常（如：异动类型为空），请核查。");
                    }
                    if (!studentChange.BeforeClassmajorID.HasValue)
                    {
                        throw new Exception("选择提交的数据存在异常（如：异动前班级为空），请核查。");
                    }
                    if (!studentChange.BeforeInSchoolStatusID.HasValue)
                    {
                        throw new Exception("选择提交的数据存在异常（如：异动前在校状态为空），请核查。");
                    }
                    if (!studentChange.AfterClassmajorID.HasValue)
                    {
                        throw new Exception("选择提交的数据存在异常（如：异动后班级为空），请核查。");
                    }
                    if (!studentChange.AfterInSchoolStatusID.HasValue)
                    {
                        throw new Exception("选择提交的数据存在异常（如：异动后在校状态为空），请核查。");
                    }
                    if (!studentChange.ChangeReasonID.HasValue)
                    {
                        throw new Exception("选择提交的数据存在异常（如：异动原因为空），请核查。");
                    }
                    if (!studentChange.ChangeDate.HasValue)
                    {
                        throw new Exception("选择提交的数据存在异常（如：异动日期为空），请核查。");
                    }
                    if (studentChange.ApprovalStatus == startStatusID)
                    {
                        submitIDList.Add(studentChange.StudentChangeID);
                    }
                    else
                    {
                        approveIDList.Add(studentChange.StudentChangeID);
                    }
                    success++;
                }
                if (submitIDList.Count > 0)
                {
                    this.StartUp(submitIDList, userID, comment);
                }
                if (approveIDList.Count > 0)
                {
                    this.Approve(approveIDList, userID, Guid.Empty, comment);
                }
                tipMessage = success + "条";
                return tipMessage;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

    }
}