using System;
using System.IO;
using System.Linq;

using JD.Timeline.Model;

using TeaBox;
using TeaBox.ObjectModel;
using JD.Serialization;

namespace JD.Timeline
{
    public class MashupVideosDocument : MashupDocument
    {
        public MashupVideosDocument(DocumentCreationContext context, Tape tape, bool fromFile = false)
            : base(context, tape, fromFile)
        { }

        protected override void LoadImpl(string filename, DocumentLoadingContext context, bool isReloading)
        {
            base.LoadImpl(filename, context, isReloading);

            GenerateVideoClips();
            foreach (var track in Tape.Tracks)
            {
                track.Height = 96;
            }
        }

        private void GenerateVideoClips()
        {
            if (!Tape.Clips.Any())
            {
                var signatures = LoadSignatures();
                var track = new TapeTrack();
                Tape.Tracks.Add(track);

                foreach (var signature in signatures.Clips.OfType<MashupClip>())
                {
                    var video = new VideoClip();
                    signature.CopyTo(video);
                    video.RegenerateId();
                    video.Track = track;
                    Tape.Clips.Add(video);
                }
            }
        }

        private Tape LoadSignatures()
        {
            var map = Tape.Map().SignatureTapeFile;
            Tape mashupTape = null;
            if (!File.Exists(map))
            {
                mashupTape = new Tape { Id = map };
            }
            else
            {
                mashupTape = LoadTape(map);
            }

            mashupTape.GenerateBlocks();
            return mashupTape;
        }
    }
}