using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EMISOnline.DataLogic.ExamSetting;
using Bowin.Common.Linq.Entity;
using EMISOnline.ViewModel.ExamView;
using System.Linq.Expressions;
using EMISOnline.Entities;
using System.Linq.Expressions;
using Bowin.Common.Linq;
using EMISOnline.ViewModel;
using Bowin.Common;
using System.Web.Script.Serialization;
using System.Xml.Serialization;
using System.IO;
using System.Xml.Linq;
using EMISOnline.DataLogic.SystemDAL;
using System.Runtime.Remoting.Contexts;
using System.Data;
using System.Text.RegularExpressions;

namespace EMISOnline.CommonLogic.ExamServices
{
    public class QuestionSettingServices : IQuestionSettingServices
    {
        public QuestionSettingDAL SettingDAL { get; set; }
        public object GetQuestionList(string Content, decimal? QuestionType, decimal? libaryid, int maximumRows, int startRowIndex)
        {
            Expression<Func<test_question, bool>> exp = (x => true);
            if (!string.IsNullOrEmpty(Content))
                exp = exp.And(q => q.content.Contains(Content));
            if (QuestionType.HasValue)
                exp = exp.And(q => q.base_question_type_id == QuestionType);
            if (libaryid.HasValue)
            {
                var libarys = getSubListid(libaryid.Value);
                exp = exp.And(q => libarys.Contains(q.test_question_libary_id.Value ));
            }
            var question = SettingDAL.GetQuestionList(exp);
            return question.OrderBy(q => q.test_question_Id).ToGridResultSet(maximumRows, startRowIndex + 1);
        }
        public List<decimal> getSubListid(decimal libaryid)
        {
            IList<test_question_libary> list = new List<test_question_libary>();
            SettingDAL.GetSubLibary(null, libaryid, list);
            List<decimal> libaryids = list.Select(q => q.test_question_libary_id).ToList();
            libaryids.Add(libaryid);
            return libaryids;
        }
        public QuestionSettingView GetQuestion(decimal test_question_Id)
        {
            var entry = SettingDAL.questionRepository.GetSingle(q => q.test_question_Id == test_question_Id);
            test_question_libary libary = GetQuestionLibary(entry.test_question_libary_id.Value);
            var question_type = SettingDAL.typeRepository.GetSingle(q => q.base_question_type_id == entry.base_question_type_id);
            var question_provid_answer = SettingDAL.answerRepository.Entities.Where(q => q.test_question_Id == test_question_Id).ToList();
            var question = new QuestionSettingView()
            {
                test_question_Id = entry.test_question_Id,
                base_question_type_id = entry.base_question_type_id,
                content = entry.content,
                question_file_id = entry.question_file_id,
                note = entry.note,
                test_question_libary_id = entry.test_question_libary_id,
                score = entry.score,
                difficulty_degree = entry.difficulty_degree,
                is_vaild = entry.is_vaild,
                TypeName = question_type.Name,
                question_provid_answer =
                question_provid_answer.Select(a => new test_question_provid_answer()
                {
                    answer_name = a.answer_name,
                    provid_answer_id = a.provid_answer_id,
                    file_id = a.file_id
                }).ToList(),

                answers = entry.answers,
                libaryName = libary.name
            };
            return question;
        }
        public test_question_libary GetQuestionLibary(decimal libary_Id)
        {
            var question = SettingDAL.libaryRepository.GetSingle(q => q.test_question_libary_id == libary_Id);
            return question;
        }
        public object GetQuestionType(bool? isEmpty)
        {
            var question = SettingDAL.typeRepository.GetList(q => true);
            var result = question.Select(q => new { q.Name, base_question_type_id = q.base_question_type_id.ToString() }).ToList();
            if (isEmpty == true)
                result.Insert(0, new { Name = "全选", base_question_type_id = "" });
            return result;
        }
        public object GetDifficulty()
        {
            var question = SettingDAL.paramRepository.GetList(q => q.base_param_parent_id == 3);
            return question.Select(q => new { q.name }).ToList();
        }
        private static Regex regAnser = new Regex(@"^[A-Z][、]");
        /// <summary>
        /// 保存试题、保存试题答案
        /// </summary>
        public void InsertByTrans(test_question tq, List<test_question_provid_answer> tqpaList, List<string> rightAnswersList, string userid)
        {
            //ToDo：保存到数据库  
            tq.question_file_id = tq.question_file_id == 0 ? null : tq.question_file_id;
            tq.created_date = DateTime.Now;
            tq.created_by = "0";
            tq.used_count = 1;
            tq.wrong_count = 0;

            string rightAnswers = "";

            foreach (test_question_provid_answer tqpa in tqpaList)
            { 
                tqpa.created_by = userid;
                tqpa.created_date = DateTime.Now;
                tqpa.test_question_Id = tq.test_question_Id;
                tq.test_question_provid_answer.Add(tqpa);
            } 
            SettingDAL.questionRepository.UnitOfWork.Add(tq);
            SettingDAL.questionRepository.UnitOfWork.Commit();

            foreach (test_question_provid_answer tqpa in tq.test_question_provid_answer)
            {
                foreach (string s in rightAnswersList)
                {
                    if (regAnser.Replace(tqpa.answer_name, "") == regAnser.Replace(s, ""))
                    {
                        rightAnswers += tqpa.provid_answer_id + ",";
                        break;
                    }
                }
            }
            if (rightAnswers.EndsWith(","))
                rightAnswers = rightAnswers.TrimEnd(',');

            tq.answers = rightAnswers;
            SettingDAL.questionRepository.UnitOfWork.Update(tq);
            SettingDAL.questionRepository.UnitOfWork.Commit();
        }
        /// <summary>
        /// 更新试题、更新试题答案
        /// </summary>
        public void UpdateByTrans(test_question setting, List<test_question_provid_answer> tqpaList, List<string> rightAnswersList, string userid)
        {
            var question = SettingDAL.questionRepository.GetSingle(q => q.test_question_Id == setting.test_question_Id);

            Entry(setting, question);

            string rightAnswers = "";

            var provid_answer_ids = tqpaList.Select(q => q.provid_answer_id).ToArray();
            SettingDAL.answerRepository.UnitOfWork.Delete<test_question_provid_answer>(q => !provid_answer_ids.Contains(q.provid_answer_id) && q.test_question_Id == question.test_question_Id);
            foreach (test_question_provid_answer tqpa in tqpaList)
            {
                foreach (string s in rightAnswersList)
                {
                    if (tqpa.answer_name == s)
                    {
                        rightAnswers += tqpa.provid_answer_id + ",";
                        break;
                    }
                }
                tqpa.created_by = userid;
                tqpa.created_date = DateTime.Now;
                tqpa.test_question_Id = question.test_question_Id;
                question.test_question_provid_answer.Add(tqpa);
                if (tqpa.provid_answer_id > 0)
                    SettingDAL.answerRepository.UnitOfWork.Update(tqpa);
                else
                    SettingDAL.answerRepository.UnitOfWork.Add(tqpa);
            }
            rightAnswers = rightAnswers.TrimEnd(',');
            question.answers = rightAnswers;
            SettingDAL.questionRepository.UnitOfWork.Commit();
        }
        public void Entry(test_question entry, test_question question)
        {
            question.base_question_type_id = entry.base_question_type_id;
            question.content = entry.content;
            question.question_file_id = entry.question_file_id == 0 ? null : entry.question_file_id;
            question.note = entry.note;
            question.test_question_libary_id = entry.test_question_libary_id;
            question.score = entry.score;
            question.difficulty_degree = entry.difficulty_degree;
            question.is_vaild = entry.is_vaild;
            question.answers = entry.answers; ;
        }
    }
}