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 EMISOnline.DataLogic.CourseworkMgr;
using System.Data;
using EMISOnline.CommonLogic.ExamServices;
using EMISOnline.ViewModel.Coursework;
using System.Collections;

namespace EMISOnline.CommonLogic.CourseworkServices
{
    public class CourseworkServices : ICourseworkServices
    {
        public CourseworkDAL CourseworkDAL { get; set; }
        public QuestionDAL QuestionDAL { get; set; }

        public IGridResultSet<CourseworkAddView> GetCourseworkList(string testname, int pageIndex, int pageSize)
        {
            Expression<Func<Coursework, bool>> exp = (x => true);
            if (!string.IsNullOrEmpty(testname))
                exp = exp.And(q => q.WorkName.Contains(testname));
            return CourseworkDAL.GetCourseworkList(exp).Select(q => q).OrderByDescending(q => q.test_begin_date).ToGridResultSet(pageIndex, pageSize);
        }

        public bool ExamSettingSave(CourseworkAddView view, string LoginID)
        {
            Coursework test = new Coursework();
            if (view.id > 0)
            {
                test = CourseworkDAL.CourseworkRepository.GetSingle(q => q.ID == view.id);
                test.created_by = LoginID;
                test.created_date = DateTime.Now.ToString("yyyy-MM-dd");
                test.EndTime = view.test_end_date;
                test.BeginTime = view.test_begin_date;
                test.PaperID = view.test_paper_id;
                test.WorkName = view.WorkName;
                test.ModityContent = view.ModityContent;
                test.EducationMissionClassID = view.EducationMissionClassID;
            }
            else
            {
                test.created_by = LoginID;
                test.created_date = DateTime.Now.ToString("yyyy-MM-dd");
                test.EndTime = view.test_end_date;
                test.BeginTime = view.test_begin_date;
                test.PaperID = view.test_paper_id;
                test.WorkName = view.WorkName;
                test.ModityContent = view.ModityContent;
                test.EducationMissionClassID = view.EducationMissionClassID;
                CourseworkDAL.CourseworkRepository.UnitOfWork.Add(test);
            }
            CourseworkDAL.CourseworkRepository.UnitOfWork.Commit();

            return true;
        }
        public CourseworkAddView getCourseWork(decimal workid)
        {
            var q = CourseworkDAL.CourseworkRepository.UnitOfWork.Set<Coursework>().Include(x => x.test_paper).Single(qx => qx.ID == workid);
            CourseworkAddView view = new CourseworkAddView();
            view.id = q.ID;
            view.test_begin_date = q.BeginTime;
            view.test_end_date = q.EndTime;
            view.test_paper_id = q.PaperID;
            view.WorkName = q.WorkName;
            view.test_paper_name = q.test_paper.PaperName;
            view.PaperData.Add(q.PaperID.ToString(), q.test_paper.PaperName);
            view.ModityContent = q.ModityContent;
            return view;
        }
        /// <summary>
        /// 获取考试对应的试卷
        /// </summary>
        /// <param name="testid"></param>
        /// <returns></returns>
        public test_paper getPaper(decimal testid)
        {
            var q = CourseworkDAL.CourseworkRepository.UnitOfWork.Set<Coursework>().Include(x => x.test_paper).Single(qx => qx.ID == testid).test_paper;
            return q;
        }

        public bool UpdatePaperID(decimal test_id, string userid, decimal newPaperid)
        {
            return CourseworkDAL.UpdatePaperID(test_id, userid, newPaperid);
        }
        public List<decimal> PaperBuilder(decimal workid, decimal paper_id)
        {
            DataSet ds = CourseworkDAL.PaperBuilder(workid, paper_id);
            var json = new JavaScriptSerializer();
            var questionTb = ds.Tables[0];
            var typeTb = ds.Tables[1];

            var result = new StringBuilder();
            var questionset = ParsePaper(typeTb, questionTb, json);
            return questionset;
        }
        private List<decimal> ParsePaper(DataTable typeTb, DataTable paperTb, JavaScriptSerializer json)
        {
            var questionQuery = paperTb.AsEnumerable();
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            var questionset = new List<decimal>();
            foreach (DataRow typeRow in typeTb.Rows)
            {
                var typeid = (decimal)typeRow["base_question_type_id"];
                var name = typeRow["Name"] as string;
                var query = from questions in questionQuery
                            where questions.Field<decimal>("base_question_type_id") == typeid
                            select questions.Field<string>("question_json");
                var questionList = new List<QuestionDetailView>();

                query.ToList().ForEach(q =>
                {
                    questionList.Add(serializer.Deserialize<QuestionDetailView>(q));
                });
                questionset.AddRange(questionList.Select(q => q.question_id).ToList());
            }
            return questionset;
        }
        public bool TakePaper(decimal test_id, string userid, Dictionary<string, string> answers)
        {
            CourseworkDAL.AnswerRepository.UnitOfWork.Delete<CourseworkAnswer>(e => e.workid == test_id && e.user_id == userid);
            string errText = string.Empty;

            if (answers.Count > 0)
            {
                var json = new JavaScriptSerializer();
                List<AnswerXml> xmlValues = new List<AnswerXml>();
                foreach (var a in answers)
                {
                    decimal question_id = 0;
                    if (decimal.TryParse(a.Key, out question_id))
                    {
                        xmlValues.Add(new AnswerXml()
                        {
                            act_score = 0,
                            answers = a.Value,
                            memo = "",
                            src_score = 0,
                            test_question_Id = question_id
                        });
                    }
                }
                try
                {
                    errText += "0-----\r\n";

                    XmlSerializer serializer = new XmlSerializer(typeof(List<AnswerXml>));
                    MemoryStream mstream = new MemoryStream();
                    serializer.Serialize(mstream, xmlValues);
                    mstream.Close();
                    errText += "1-----\r\n";

                    errText += Encoding.Default.GetString(mstream.ToArray());

                    var examAnswer = new CourseworkAnswer()
                    {
                        workid = test_id,
                        user_id = userid,
                        resultXml = XElement.Parse(Encoding.UTF8.GetString(mstream.ToArray())).ToString()
                    };
                    errText += "2-----\r\n";
                    errText = examAnswer.resultXml.ToString();

                    CourseworkDAL.AnswerRepository.UnitOfWork.Add(examAnswer);
                }
                catch (Exception ex)
                {
                    //System.IO.StreamWriter sw = new System.IO.StreamWriter(Server.Current.Request.PhysicalApplicationPath + "\\lingx.txt", true, System.Text.Encoding.UTF8);
                    //sw.WriteLine(DateTime.Now.ToString());
                    //sw.WriteLine(errText); ;
                    //sw.Close();
                }
            }

            var test_man = CourseworkDAL.ResultRepository.GetSingle(m => m.user_id == userid && m.workid == test_id);
            if (test_man != null)
            {
                test_man.state = 2;
                test_man.test_end_date = DateTime.Now;
            }

            CourseworkDAL.ResultRepository.UnitOfWork.Commit();
            return true;
        }

        public IGridResultSet<CourseworkReviewView> GetReviewList(string testname, decimal workid, int pageIndex, int pageSize)
        {
            Expression<Func<CourseworkResult, bool>> exp = (x => x.workid == workid);
            if (!string.IsNullOrEmpty(testname))
                exp = exp.And(q => q.Coursework.WorkName.Contains(testname));
            return CourseworkDAL.GetReviewList(exp).OrderBy(q => q.ResultID).ToGridResultSet(pageIndex, pageSize);
        }
        public CourseworkResult GetCourseWorkResult(decimal ResultID)
        {
            return CourseworkDAL.ResultRepository.GetSingle(q => q.ID == ResultID);
        }
        public string ShowPaperQuestion(decimal workid, decimal paper_id)
        {
            var QeustionSet = PaperBuilder(workid, paper_id);

            var questions = QuestionDAL.GetPaperQuestion(QeustionSet.ToArray()).ToList();
            var questionTypes = QuestionDAL.ListAllQuestionType();
            var Answers = CourseworkDAL.ExamineeAnswers(workid).ToDictionary(q => q.test_question_Id, q => q.answers);
            var result = new ArrayList();
            questions.ForEach(q =>
            {
                q.userAnswer = Answers.ContainsKey(q.question_id) ? Answers[q.question_id] : "";
                //ReadQuestion(q, q.userAnswer, (int)q.question_typeid);
            });
            foreach (var type in questionTypes)
            {
                if (questions.Any(q => q.question_typeid == type.base_question_type_id))
                    result.Add(new { id = type.base_question_type_id, name = type.Name, questions = questions });
            }
            var data = new
            {
                score = questions.Sum(q => q.score),//试题总分
                studentscore = questions.Sum(q => q.userscore), //你的得分
                questionnumber = QeustionSet.Count(),//试题总数
                rightnumber = questions.Count(q => q.userscore > 0),//答对题数
                errornumber = questions.Count(q => q.userscore == 0 && !string.IsNullOrEmpty(q.userAnswer)),//答错题数
                unquestion = QeustionSet.Count() - QeustionSet.Count,//未答题数
            };
            var js = new JavaScriptSerializer();
            return js.Serialize(new { data = data, result = result });
        }
    }
}