using OpenCvSharp;
namespace SHH.CameraSdk
{
    /// <summary>
    /// [图像缩放服务]
    /// 实现：基于基类，专注于将原图缩放并挂载到 TargetMat
    /// </summary>
    public class ImageScaleCluster : BaseFrameProcessor<ScaleWorker>
    {
        public ImageScaleCluster(int count) : base(count, "ScaleCluster") { }

        protected override ScaleWorker CreateWorker(int id) => new ScaleWorker(this);
    }

    public class ScaleWorker : BaseWorker
    {
        private readonly ImageScaleCluster _parent;
        public ScaleWorker(ImageScaleCluster parent) => _parent = parent;

        protected override void PerformAction(SmartFrame frame, FrameDecision decision)
        {
            int targetW = 704;
            int targetH = 576;

            // 算法逻辑：若尺寸符合要求则执行 Resize
            if (frame.InternalMat.Width > targetW)
            {
                Mat targetMat = new Mat();
                Cv2.Resize(frame.InternalMat, targetMat, new Size(targetW, targetH), 0, 0, InterpolationFlags.Linear);

                // 挂载到衍生属性
                frame.AttachTarget(targetMat, FrameScaleType.Shrink);
            }
        }

        protected override void NotifyFinished(long did, SmartFrame frame, FrameDecision dec)
        {
            _parent.PassToNext(did, frame, dec);
        }
    }
}