using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core;

namespace Tango.FSE.Common.RemoteDesktop
{
    public class VideoRecordingHandler : ExtendedObject
    {
        private IRemoteDesktopProvider _provider;
        private Mp4VideoEncoder _encoder;

        public event EventHandler<TangoProgressChangedEventArgs<double>> Progress;

        private TangoProgress<double> _saveProgress;
        public TangoProgress<double> SaveProgress
        {
            get { return _saveProgress; }
            set { _saveProgress = value; RaisePropertyChangedAuto(); }
        }

        public VideoRecordingHandler(IRemoteDesktopProvider provider)
        {
            _provider = provider;
            provider.FrameReceived += Provider_FrameReceived;
            _encoder = new Mp4VideoEncoder();
            _encoder.Progress += _encoder_Progress;
            _encoder.Start();
        }

        private void Provider_FrameReceived(object sender, DesktopFrameReceivedEventArgs e)
        {
            _encoder.PushFrame(e.Source);
        }

        public void Stop()
        {
            _encoder.Stop();
        }

        public void Cancel()
        {
            _encoder.Cancel();
        }

        public Task Save(String outputFile)
        {
            return _encoder.Save(new VideoConfiguration()
            {
                Quality = VideoQuality.Good,
                FrameWidth = _provider.FrameWidth,
                FrameHeight = _provider.FrameHeight,
                FrameRate = _provider.FrameRate
            }, outputFile);
        }

        private void _encoder_Progress(object sender, TangoProgressChangedEventArgs<double> e)
        {
            SaveProgress = e.Progress;
            Progress?.Invoke(this, e);
        }
    }
}