using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EMISOnline.Entities;
using EMISOnline.DataLogic.Repositories;
using System.Linq.Expressions;
using System.Data;
using EMISOnline.ViewModel.ExamView;
using Bowin.Common.Linq;

namespace EMISOnline.DataLogic.ExamSetting
{
    public class QuestionDAL : SqlHelper
    {
        public base_question_typeRepository typeRepository { get; set; }
        public questionRepository questionRepository { get; set; }
        public question_provid_answerRepository answerRepository { get; set; }
        public question_libaryRepository libaryRepository { get; set; }

        public test_base_question_type[] ListAllQuestionType()
        {
            return typeRepository.Entities.OrderBy(q => q.diplay_order).ToArray();
        }
        public decimal[] GeneratePractice(string[] libaryids, List<string> typeID, int? num)
        {
            var ds = Query("dbo.[SP_GeneratePractice]",
                new KeyValuePair<string, object>("@libryid", string.Join(",", libaryids)),
                new KeyValuePair<string, object>("@questionType", typeID.Count > 0 ? string.Join(",", typeID.ToArray()) : ""),
                new KeyValuePair<string, object>("@questionLength", num));
            return ds.Tables[0].AsEnumerable().Select(d => d.Field<decimal>("test_question_Id")).ToArray();
        }
        public object GetQuestion(decimal[] question_ids)
        {

            var query = from q in questionRepository.Entities
                        //let answer = answerRepository.
                        where question_ids.Contains(q.test_question_Id)
                        where !q.filled
                        select new
                        {
                            typeName = q.test_base_question_type.Name,
                            q.content,
                            q.test_question_Id,
                            q.base_question_type_id,
                            hasImg = q.question_file_id.HasValue,
                            url = q.question_file_id.HasValue ? q.test_question_file.url : "",
                            q.score,
                            rightAnswer = q.answers,
                            Answers = q.test_question_provid_answer.Select(a => new
                            {
                                a.answer_name,
                                a.provid_answer_id,
                                hasImg = a.file_id.HasValue,
                                url = a.file_id.HasValue ? a.test_question_file.url : "",
                            })
                        };
            return query.SingleOrDefault();
        }

        public IQueryable<PaperQuestionView> GetPaperQuestion(decimal[] question_ids)
        {

            var query = from q in questionRepository.Entities
                        //let answer = answerRepository.
                        where question_ids.Contains(q.test_question_Id)
                        where !q.filled
                        select new PaperQuestionView
                        {
                            content = q.content,
                            question_id = q.test_question_Id,
                            question_typeid=q.base_question_type_id.Value,
                            hasImg = q.question_file_id.HasValue,
                            url = q.question_file_id.HasValue ? q.test_question_file.url : "",
                            score = q.score.HasValue ? q.score.Value : 0,
                            rightAnswer = q.answers,
                            answers = q.test_question_provid_answer.Select(a => new Answers
                            {
                                content = a.answer_name,
                                answer_id=a.provid_answer_id,
                                hasImg = a.file_id.HasValue,
                                url = a.file_id.HasValue ? a.test_question_file.url : "",
                            })
                        };
            return query.AsQueryable();
        }

        /// <summary>
        /// 获取所有的题库目录树数据
        /// </summary>
        /// <returns></returns>
        public System.Data.DataTable ListQuesLibTreeStu()
        {

            var query = from lib in libaryRepository.Entities
                        where lib.filled == false
                        select new
                        {
                            lib.test_question_libary_id,
                            lib.name,
                            lib.parent_id
                        };
            return query.ToTable();
        }
    }
}