using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Ease.CoreV35;
using Ease.CoreV35.Model;
using Ease.CoreV35.DataAccess;
using Payroll.BO;
using Ease.CoreV35.Caching;

namespace Payroll.Service
{
    [Serializable]
    public class QuestionService : ServiceTemplate, IQuestionService
    {
         #region Private functions and declaration
        Cache _cache = new Cache(typeof(Question));

        #endregion
        public QuestionService() { }

        private void MapObject(Question oQuestion, DataReader oReader)
        {
           base.SetObjectID(oQuestion, oReader.GetID("QuestionID"));
           //oQuestion.QuestionID = oReader.GetID("QuestionID");
            oQuestion.QuestionNo = oReader.GetString("QuestionNo");
            oQuestion.CategoryID = oReader.GetInt32("CategoryID").GetValueOrDefault();
            oQuestion.QuestionBody = oReader.GetString("QuestionBody");
            oQuestion.Image = oReader.GetString("Image");
            oQuestion.IsMultiple = oReader.GetBoolean("IsMultiple").GetValueOrDefault();
            oQuestion.IsPublished = oReader.GetBoolean("IsPublished").GetValueOrDefault();
            oQuestion.CreationDate = oReader.GetDateTime("CreationDate").Value;
            oQuestion.UserID = oReader.GetInt32("UserID").GetValueOrDefault();
            oQuestion.QuestionType = (EnumSurveyQuestionType)oReader.GetInt32("QuestionType").Value;
            oQuestion.CreatedBy = oReader.GetID("CreatedBy");
            oQuestion.ModifiedBy = oReader.GetID("ModifiedBy");
            oQuestion.ModifiedDate = oReader.GetDateTime("ModifiedDate");
            this.SetObjectState(oQuestion, Ease.CoreV35.ObjectState.Saved);
        }
        protected override T CreateObject<T>(DataReader oReader)
        {
            Question oQuestion = new Question();
            MapObject(oQuestion, oReader);
            return oQuestion as T;
        }
        protected Question CreateObject(DataReader oReader)
        {
            Question oQuestion = new Question();
            MapObject(oQuestion, oReader);
            return oQuestion;            
        }
        #region Service implementation

        public Question Get(ID id)
        {
            Question oQuestion = new Question();
            #region Cache Header
            oQuestion = (Question)_cache["Get", id.Integer];
            if (oQuestion != null)
                return oQuestion;
            #endregion
            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin();
                DataReader oreader = new DataReader(QuestionDA.Get(tc, id.Integer));
                if (oreader.Read())
                {
                    oQuestion = this.CreateObject<Question>(oreader);
                }
                oreader.Close();
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException("Failed to Get Question", e);
                #endregion
            }
            #region Cache Footer
            _cache.Add(oQuestion, "Get", id.Integer);
            #endregion
            return oQuestion;
        }

        public ObjectsTemplate<Question> Get()
        {


            #region Cache Header

            ObjectsTemplate<Question> oQuestions = _cache["Get"] as ObjectsTemplate<Question>;
            if (oQuestions != null)
                return oQuestions;

            #endregion

            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin();
                DataReader dr = new DataReader(QuestionDA.Get(tc));
                oQuestions = this.CreateObjects<Question>(dr);
                dr.Close();
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException(e.Message, e);
                #endregion
            }
            #region Cache Footer
            _cache.Add(oQuestions, "Get");
            #endregion
            return oQuestions;
        }
        public ObjectsTemplate<Question> GetByCategory(ID categoryID)
        {
            #region Cache Header

            ObjectsTemplate<Question> oQuestions = _cache["Get", categoryID] as ObjectsTemplate<Question>;
            if (oQuestions != null)
                return oQuestions;

            #endregion

            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin();
                DataReader dr = new DataReader(QuestionDA.GetByCategory(tc,categoryID.Integer));
                oQuestions = this.CreateObjects<Question>(dr);
                dr.Close();
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException(e.Message, e);
                #endregion
            }
            #region Cache Footer
            _cache.Add(oQuestions, "Get", categoryID);
            #endregion
            return oQuestions;
        }
        public bool IsTagged(ID id)
        {
            bool retVal = false;
            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin();
                retVal = QuestionDA.IsTagged(tc, id.Integer);
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException("Failed to Get Information", e);
                #endregion
            }
            return retVal;
        }
        public ID Save(Question oQuestion)
        {
            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin(true);
                int codeLength = 3;
                if (oQuestion.IsNew)
                {

                    int id = tc.GenerateID("Question", "QuestionID");
                    base.SetObjectID(oQuestion, ID.FromInteger(id));                
                    QuestionDA.Insert(tc, oQuestion);
                }
                else
                {
                    QuestionDA.Update(tc, oQuestion);
                }
                #region Saving answers

                QuestionAnswerDA.DeleteByQuestionId(tc, oQuestion.ID.Integer);
                foreach (QuestionAnswer ans in oQuestion.QuestionAnswers)
                {
                    int id = tc.GenerateID("QuestionAnswer", "AnswerID");
                    base.SetObjectID(ans, ID.FromInteger(id));
                    ans.QuestionID = oQuestion.ID.Integer;
                    QuestionAnswerDA.Insert(tc, ans);
                }                
                #endregion
                tc.End();
                return oQuestion.ID;
            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException(e.Message, e);
                #endregion
            }
        }


        public void Delete(ID id)
        {
            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin(true);
                QuestionAnswerDA.DeleteByQuestionId(tc, id.Integer); 
                QuestionDA.Delete(tc, id.Integer);
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException(e.Message, e);
                #endregion
            }
        }
        #endregion

    }
}