using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EMISOnline.DataLogic.Repositories;
using System.Linq.Expressions;
using EMISOnline.Entities;
using System.Data;
using EMISOnline.DataLogic.ExamSetting;
using EMISOnline.ViewModel.Coursework;
using EMISOnline.ViewModel.ExamView;
using System.Xml.Linq;

namespace EMISOnline.DataLogic.CourseworkMgr
{
    public class CourseworkDAL : SqlHelper
    {
        public CourseworkRepository CourseworkRepository { get; set; }
        public CourseworkResultRepository ResultRepository { get; set; }
        public CourseworkAnswerRepository AnswerRepository { get; set; }
        public paper_question_setRepository question_setRepository { get; set; }
        public EducationMissionClassRepository EducationMissionClassRepository { get; set; }
        public EducationMissionRepository EducationMissionRepository { get; set; }
        public ExecutablePlanRepository ExecutablePlanRepository { get; set; }
        public CoursematerialRepository CoursematerialRepository { get; set; }
        public GrademajorRepository GrademajorRepository { get; set; }
        public SchoolyearRepository SchoolyearRepository { get; set; }

        public IQueryable<CourseworkAddView> GetCourseworkList(Expression<Func<Coursework, bool>> testExpression)
        {
            var query = from q in CourseworkRepository.Entities.Where(testExpression)
                        join emc in EducationMissionClassRepository.Entities on q.EducationMissionClassID equals emc.EducationMissionClassID 
                        join em in EducationMissionRepository.Entities on emc.EducationMissionID equals em.EducationMissionID 
                        join cm in CoursematerialRepository.Entities on emc.CoursematerialID equals cm.CoursematerialID
                        join sy in SchoolyearRepository.Entities on em.SchoolyearID equals sy.SchoolyearID
                        select new CourseworkAddView()
                        {
                            test_paper_name = q.test_paper.PaperName,
                            WorkName = q.WorkName,
                            id = q.ID,
                            test_begin_date = q.BeginTime,
                            test_end_date = q.EndTime,
                            CoursematerialName=cm.CourseName
                        };

            return query.AsQueryable();
        }
        public IQueryable<CourseworkReviewView> GetReviewList(Expression<Func<CourseworkResult, bool>> testExpression)
        {
            var query = from r in ResultRepository.Entities.Where(testExpression)
                        join c in CourseworkRepository.Entities on r.workid equals c.ID
                        select new CourseworkReviewView()
                        {
                            ResultID = r.ID,
                            user_id = r.user_id,
                            username = r.username,
                            test_end_date = r.test_end_date,
                            score = r.score,
                            state = r.state,
                            WorkName = c.WorkName,
                            PaperName = c.test_paper.PaperName
                        };

            return query.AsQueryable();
        }
        /// <summary>
        /// 修改分配的试卷ID
        /// </summary>
        /// <param name="test_id"></param>
        /// <param name="userid"></param>
        /// <param name="paperID"></param>
        /// <returns></returns>
        public bool UpdatePaperID(decimal workid, string userid, decimal paperID)
        {
            //删除原试卷数据
            var paper = from p in PaperRepository.Entities
                        join t in CourseworkRepository.Entities on p.test_paper_parent_id equals t.PaperID
                        where t.ID == workid
                        select p;

            if (paper != null && paper.Count() > 0)
            {
                var paperid = paper.ToArray()[0].test_paper_id;
                Expression<Func<test_paper_question_set, bool>> whereExpression = (q => q.test_paper_id == paperid);
                question_setRepository.UnitOfWork.Delete(whereExpression);
                //context.test_paper_question_set_fortest.Delete(q => q.test_paper_id == paperid);
                Expression<Func<test_paper, bool>> paperExpression = (q => q.test_paper_id == paperid);
                PaperRepository.UnitOfWork.Delete(paperExpression);
                question_setRepository.UnitOfWork.Commit();
            }

            var result = ResultRepository.Entities.Where(q => q.workid == workid && q.user_id == userid).FirstOrDefault();
            if (result != null)
            {
                result.test_paper_id = paperID;
                question_setRepository.UnitOfWork.Commit();
                return true;
            }
            return false;
        }
        public DataSet PaperBuilder(decimal workid, decimal paper_id)
        {
            var ds = Query("dbo.sp_coursework_paper",
                new KeyValuePair<string, object>("@workid", workid),
                new KeyValuePair<string, object>("@test_paper_id", paper_id));

            return (ds);
        }
        public List<AnswerXml> ExamineeAnswers(decimal workid)
        {
            var paperset = AnswerRepository.GetSingle(q => q.workid == workid);
            XElement xml = XElement.Parse(paperset.resultXml);
            var question_set = from c in xml.Descendants("AnswerXml")
                               select new AnswerXml
                               {
                                   test_question_Id = decimal.Parse(c.Element("test_question_Id").Value),
                                   answers = c.Element("answers").Value,
                                   src_score = decimal.Parse(c.Element("src_score").Value),
                                   act_score = decimal.Parse(c.Element("act_score").Value),
                               };
            return question_set.ToList();
        }
        
    }
}