using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using Bowin.Common.Linq.Entity;
using EMISOnline.ViewModel.SystemView;
using EMISOnline.DataLogic.SystemDAL;
using EMISOnline.Entities;
using EMISOnline.DataLogic.Student;
using EMISOnline.CommonLogic.StudentServices;
using Bowin.Web.Controls.Mvc;
using Bowin.Common.Linq;
using EMISOnline.ViewModel;

namespace EMISOnline.CommonLogic.SchoolyearServices
{
    public class CoursematerialServices : BaseServices, ICoursematerialServices
    {
        public CoursematerialDAL CoursematerialDAL { get; set; }
        

        public IList<V_StudentEducationMissionClass> GetStudentCoursematerialList(Guid UserID, Guid SchoolyearID)
        {
            Expression<Func<V_StudentEducationMissionClass, bool>> exp = (x => x.UserID == UserID && x.SchoolyearID == SchoolyearID);

            
            List<V_StudentEducationMissionClass> list = CoursematerialDAL.GetSutdentCoursematerial(exp).ToList();

            return list;
        }

        public V_StudentEducationMissionClass GetEducationMissionClass(Guid EducationMissionClassID)
        {
            Expression<Func<V_StudentEducationMissionClass, bool>> exp = (x => x.EducationMissionClassID == EducationMissionClassID);
            return CoursematerialDAL.GetSutdentCoursematerial(exp).FirstOrDefault();
        }

        public List<TreeItem> GetCourseChapterTree(Guid CoursematerialID)
        {
            List<EM_CourseChapter> list = CoursematerialDAL.GetCourseChapterByCoursematerialID(CoursematerialID);

            return CreateCourseChapterTree(list,null);
        }

        public List<TreeItem> CreateCourseChapterTree(List<EM_CourseChapter> list, Guid? ParentId)
        {
            List<TreeItem> rtn = new List<TreeItem>();
            List<EM_CourseChapter> childs = list.Where(w => w.ParentCourseChapterID == ParentId).ToList();
            foreach (EM_CourseChapter e in childs)
            {
                TreeItem item = new TreeItem();
                item.id = e.CourseChapterID.ToString();
                item.text = e.Name;
                item.attributes = null;
                
                //查找视频信息
                var query = from a in CoursematerialDAL.GetCourseVideo(e.CourseChapterID) 
                            where e.VideoTypeID == (int)EM_OnlineVideoType.Local 
                            select new TreeItem
                            {
                                id = a.CourseVideoID.ToString(),
                                text = a.Name,
                                attributes = new { VideoTypeID = (int)EM_OnlineVideoType.Local, a.PlayUrl }
                            };
                var videoInfoList = query.ToList();
                if (e.VideoTypeID == (int)EM_OnlineVideoType.Outer)
                {
                    videoInfoList.Add(new TreeItem { id = Guid.NewGuid().ToString(), text = e.Name, attributes = new { VideoTypeID = (int)EM_OnlineVideoType.Outer, PlayUrl = e.OuterVideoUrl } });
                }
                   //var childrenList = videoInfoList.Concat(CreateCourseChapterTree(list, e.CourseChapterID)).ToList();
                   
                if(e.ParentCourseChapterID==null)
                {
                    List<EM_CourseChapter> childList = list.Where(w => w.ParentCourseChapterID == e.CourseChapterID).ToList();
                    foreach (EM_CourseChapter c in childList)
                    {
                        //查找视频信息
                        var childQuery = from a in CoursematerialDAL.GetCourseVideo(c.CourseChapterID)
                                         where c.VideoTypeID == (int)EM_OnlineVideoType.Local
                                    select new TreeItem
                                    {
                                        id = a.CourseVideoID.ToString(),
                                        text = a.Name,
                                        attributes = new { VideoTypeID = (int)EM_OnlineVideoType.Local, a.PlayUrl }
                                    };
                        var childVideoInfoList = childQuery.ToList();
                        if (c.VideoTypeID == (int)EM_OnlineVideoType.Outer)
                        {
                            childVideoInfoList.Add(new TreeItem { id = Guid.NewGuid().ToString(), text = c.Name, attributes = new { VideoTypeID = (int)EM_OnlineVideoType.Outer, PlayUrl = c.OuterVideoUrl } });
                        }
                        var childrensList = childVideoInfoList.ToList();

                        item.children = childVideoInfoList;
                    }
                }
                rtn.Add(item);
            }

            return rtn;
        }

        public EM_CourseStudyStatus GetCourseStudyStatusByUser(Guid CoursematerialID,Guid UserID)
        {
            Expression<Func<EM_CourseStudyStatus, bool>> exp = (x => x.UserID == UserID);
            exp = exp.And(x => x.CoursematerialID == CoursematerialID);

            EM_CourseStudyStatus css = CoursematerialDAL.CourseStudyStatusRepository.GetList(exp).FirstOrDefault();
            if (css == null)
            {
                css = new EM_CourseStudyStatus();
                css.CourseStudyStatusID = Guid.NewGuid();
                css.CoursematerialID = CoursematerialID;
                css.UserID = UserID;
                css.LastVideoTypeID = (int)EM_OnlineVideoType.Local;
                css.ContinuousTime = 0;
                css.LastCourseVideoLength = 0;
                css.LastOuterVideoUrl = "";

                UnitOfWork.Add(css);
                UnitOfWork.Commit();
            }
            return css;
        }

        public void SaveCourseStudyStatusByUser(EM_CourseStudyStatus cstatus)
        {
            EM_CourseStudyStatus css = GetCourseStudyStatusByUser(cstatus.CoursematerialID.Value, cstatus.UserID);
            css.ContinuousTime = cstatus.ContinuousTime;
            css.LastCourseVideoID = cstatus.LastCourseVideoID;
            css.LastCourseVideoLength = cstatus.LastCourseVideoLength;
            UnitOfWork.Update(css);
            UnitOfWork.Commit();
        }

        public EM_CourseVideo GetCourseVideo(Guid CourseVideoID)
        {
            return CoursematerialDAL.CourseVideoRepository.GetList(w => w.CourseVideoID == CourseVideoID).FirstOrDefault();
        }

        public EM_CourseVideo GetFirstCourseVideo(Guid CoursematerialID)
        {
            return CoursematerialDAL.GetCourseVideoByCoursematerialID(CoursematerialID).FirstOrDefault();
        }
        public EM_CourseChapter GetOutPlayUrl(Guid CoursematerialID) 
        {
            return CoursematerialDAL.CourseChapterRepository.GetList(x => x.CoursematerialID == CoursematerialID).FirstOrDefault();
        }
        public ER_ScoreRule getScoreRule()
        {
            return CoursematerialDAL.GetScoreRule();
        }

       
    }
}