using Server.Factory;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using VM;
using Utils;

namespace Web
{
    public class ExamBLL
    {
        /// <summary>
        /// 理论考核自动组卷
        /// </summary>
        /// <param name="paper"></param>
        public void TheoAutoFormPaper(PaperVM paper)
        {  
            paper.Details = new List<PaperDetailVM>();
            var scoreInfo = paper.ScoreInfo;
            foreach (var item in scoreInfo)
            {
                var charpterList = item.CharpterID.Split(',').Select(l => int.Parse(l)).ToList();
                var questions = (from x in ExamCaches.QuestionCache
                                 where charpterList.Contains(x.Value.CharpterID) && (x.Value.Status != (int)QuestionStauts.Delete
                                 && x.Value.Status != (int)QuestionStauts.Close) && (x.Value.UserId == paper.UserId || x.Value.UserId == 0)
                                 && !(ExamCaches.QuestionHiddenCache.Values.Where(y => y.UserId == paper.UserId).Select(y => y.QuestionId).ToList()).Contains(x.Value.Id)
                                 //    &&x.Value.UserId==paper.UserId
                                 orderby Guid.NewGuid()
                                 select x.Key).Take(item.Count).ToList();
                paper.Details.AddRange(questions.Select(l => new PaperDetailVM { QuesionId = l }));
            }
        }

        /// <summary>
        /// 认证考试自动组卷
        /// </summary>
        /// <param name="paper"></param>
        /// <param name="errCode"></param>
        /// <returns></returns>
        public bool CertAutoFromPaper(PaperVM paper, out string errCode)
        {
            //获取班级Id
            int classId = MvcHelper.User.UserClassInfo[0].ClassId;
            //根据班级Id获取教师Id 
            int teacherId = StructureCaches.ClassCache[classId].TeacherId;

            errCode = string.Empty;
            paper.Details = new List<PaperDetailVM>();
            var scoreInfo = paper.ScoreInfo;
            foreach (var item in scoreInfo)
            {
                var charpterList = item.CharpterID.Split(',').Select(l => int.Parse(l)).ToList();
                var questions = (from x in ExamCaches.QuestionCache
                                 where charpterList.Contains(x.Value.CharpterID) && (x.Value.Status != (int)QuestionStauts.Delete 
                                 && x.Value.Status != (int)QuestionStauts.Close) && (x.Value.UserId == teacherId || x.Value.UserId == 0)
                                 && !(ExamCaches.QuestionHiddenCache.Values.Where(y => y.UserId == teacherId).Select(y=>y.QuestionId).ToList()).Contains(x.Value.Id)
                                 orderby Guid.NewGuid()
                                 select x.Key).Take(item.Count).ToList();
                if (questions.Count < item.Count)
                {
                    errCode = TrainingCaches.TheoryChapterCache[paper.CharpterList[0].CharpterID].ChapterName + "题量不足！";
                    return false;
                }
                paper.Details.AddRange(questions.Select(l => new PaperDetailVM { QuesionId = l }));
            }
            return true;
        }

        /// <summary>
        /// 分页获取用户总结信息
        /// </summary>
        /// <param name="paperId"></param>
        /// <param name="classID"></param>
        /// <param name="pageIndex"></param>
        /// <param name="pageSize"></param>
        /// <param name="total"></param>
        /// <returns></returns>
        public List<PaperUserSummaryVM> PageGetUserSummary(int paperId, int? classID, bool sortWay, int pageIndex, int pageSize, out int total)
        {
            total = 0;
            List<PaperUserSummaryVM> source = null;
            if (!ExamCaches.UserSummaryCache.ContainsKey(paperId))
            {
                source = SvrFactory.Instance.ExamSvr.GetAllUserSummaryByPaperId(paperId);
                if (source != null && source.Count > 0)
                {
                    ExamCaches.UserSummaryCache.SyncCache(paperId, source, false);
                }
            }
            else
            {
                source = ExamCaches.UserSummaryCache[paperId];
            }
            var res = (classID.HasValue ? source.Where(l => l.ClassId == classID.Value): source );
            if (sortWay)
                return res.OrderBy(x=>x.Score).Page(pageIndex, pageSize, out total);
            else 
                return res.OrderByDescending(x => x.Score).Page(pageIndex, pageSize, out total);
        }
    }
}