using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EMISOnline.Entities;
using EMISOnline.DataLogic.Educational;
using EMISOnline.ViewModel.Educational;
using Bowin.Common.Linq.Entity;
using Bowin.Common.Linq;
using System.Linq.Expressions;
using System.Web.Script.Serialization;
using EMISOnline.ViewModel;

namespace EMISOnline.CommonLogic.EducationalServices
{
    public class CourseBuildServices : BaseServices, ICourseBuildServices
    {
        public CourseDAL CourseDAL { get; set; }
        public CourseBuildDAL CourseBuildDAL { get; set; }

        public IGridResultSet<CoursematerView> GetCoursematerList(int pageIndex, int pageSize, string courseName, string CourseCode)
        {
            Expression<Func<CoursematerView, bool>> exp = (e => true);
            if (!string.IsNullOrEmpty(courseName))
            {
                exp = exp.And(e => e.CourseName.Contains(courseName.Trim()));
            }
            if (!string.IsNullOrEmpty(CourseCode))
            {
                exp = exp.And(e => e.CourseCode.Contains(CourseCode.Trim()));
            }
            var list = CourseDAL.GetCourseList().Where(exp).OrderByDescending(r => r.CreateTime).ToGridResultSet(pageIndex, pageSize);

            return list;
        }

        public IGridResultSet<CourseChapterView> GetCourseChapterList(int pageIndex, int pageSize, string chapterName, Guid? CoursematerialID)
        {
            Expression<Func<CourseChapterView, bool>> exp = (e => true);
            if (!string.IsNullOrEmpty(chapterName))
            {
                exp = exp.And(e => e.Name.Contains(chapterName.Trim()));
            }
            if (CoursematerialID.HasValue)
            {
                exp = exp.And(e => e.CoursematerialID == CoursematerialID);
            }

            var list = CourseBuildDAL.GetCourseChapterList().Where(exp).OrderByDescending(r => r.CreateTime).ToGridResultSet(pageIndex, pageSize);

            return list;
        }

        public IList<CourseChapterView> GetCourseChapterList(Guid? CoursematerialID)
        {
            Expression<Func<CourseChapterView, bool>> exp = (e => true);
            if (CoursematerialID.HasValue)
            {
                exp = exp.And(e => e.CoursematerialID == CoursematerialID);
            }

            var list = CourseBuildDAL.GetCourseChapterList().Where(exp).OrderBy(r => r.OrderID).ToList();

            return list;
        }

        public IGridResultSet<CourseVideoView> GetChaperVideoList(Guid? CourseChapterID)
        {
            Expression<Func<CourseVideoView, bool>> exp = (e => true);
            if (CourseChapterID.HasValue)
            {
                exp = exp.And(e => e.CourseChapterID == CourseChapterID);
            }

            var list = CourseBuildDAL.GetChaperVideoList().Where(exp).OrderBy(r => r.CreateTime).ToList();
            var result = new GridResultSet<CourseVideoView>
            {
                rows = list
            };

            result.total = list.Count;
            return result;
        }

        public IGridResultSet<CourseVideoView> GetVideoList(int pageIndex, int pageSize, string videoName)
        {
            Expression<Func<CourseVideoView, bool>> exp = (e => true);
            if (!string.IsNullOrEmpty(videoName))
            {
                exp = exp.And(e => e.Name.Contains(videoName.Trim()));
            }
            var list = CourseBuildDAL.GetVideoList().Where(exp).OrderByDescending(r => r.CreateTime).ToGridResultSet(pageIndex, pageSize);

            return list;
        }

        public void AddChapter(Guid? ParentCourseChapterID, Guid? CourseChapterID, string Name, int? OrderID,
            int VideoTypeID, Guid? CourseVideoID, string OuterVideoUrl,
            Guid CoursematerialID)
        {
            EM_CourseChapter chapter = new EM_CourseChapter();
            if (CourseChapterID.HasValue && CourseChapterID != Guid.Empty)//修改
            {
                chapter = CourseBuildDAL.GetChapterSingle(CourseChapterID.Value);

                chapter.ParentCourseChapterID = ParentCourseChapterID;
                chapter.Name = Name;
                chapter.OrderID = OrderID;
                chapter.CoursematerialID = CoursematerialID;
                chapter.VideoTypeID = VideoTypeID;
                chapter.OuterVideoUrl = OuterVideoUrl;
                UnitOfWork.Update(chapter);
            }
            else//新增
            {
                chapter.CourseChapterID = Guid.NewGuid();
                chapter.ParentCourseChapterID = ParentCourseChapterID;
                chapter.Name = Name;
                chapter.OrderID = OrderID;
                chapter.CreateTime = DateTime.Now;
                chapter.CoursematerialID = CoursematerialID;
                chapter.VideoTypeID = VideoTypeID;
                chapter.OuterVideoUrl = OuterVideoUrl;
                chapter.RecordStatus = 1;
                UnitOfWork.Add(chapter);
            }
            if (CourseVideoID.HasValue && VideoTypeID == (int)EM_OnlineVideoType.Local)
            {
                CourseBuildDAL.DelChapterVideo(chapter.CourseChapterID);

                EM_CourseChapter_Video chapterVideo = new EM_CourseChapter_Video();
                chapterVideo.CourseChapterID = chapter.CourseChapterID;
                chapterVideo.CourseVideoID = CourseVideoID.Value;
                UnitOfWork.Add(chapterVideo);
            }

            UnitOfWork.Commit();
        }

        public void DeleteChapter(Guid CourseChapterID)
        {
            CourseBuildDAL.DelChapter(CourseChapterID);

            UnitOfWork.Commit();
        }

        public bool IsAnySubChapter(Guid ParentCourseChapterID)
        {
            return CourseBuildDAL.IsAnySubChapter(ParentCourseChapterID);
        }
    }
}