using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using bbiwarg.Recognition.HandRecognition;
using bbiwarg.Utility;
using Emgu.CV.Structure;
using Emgu.CV;

namespace bbiwarg.Recognition.PalmRecognition
{
    class PalmDetector
    {
        private List<Hand> hands;
        private List<Hand> palmHands;

        public List<Palm> Palms { get; private set; }

        public PalmDetector(List<Hand> hands)
        {
            this.hands = hands;

            findPalmHands();
            createPalms();
        }

        private void findPalmHands()
        {
            palmHands = new List<Hand>();

            foreach (Hand hand in hands)
            {
                if (hand.ThumbDefect != null)
                    palmHands.Add(hand);
            }
        }

        private void createPalms()
        {
            Palms = new List<Palm>();
            foreach (Hand palmHand in palmHands)
            {
                ConvexityDefect thumbDefect = palmHand.ThumbDefect;

                Vector2D handLength = 1.5f*thumbDefect.VectorLong;
                Vector2D handWidth = 0.45f*handLength.getOrthogonal(palmHand.Side == HandSide.Right);

                Vector2D fingersUpper = thumbDefect.Inner + 0.75f*handLength;
                Vector2D wristUpper = thumbDefect.Inner - 0.25f*handLength;
                Vector2D wristLower = wristUpper + handWidth;
                Vector2D fingersLower = wristLower + 0.75f * handLength - 0.2f * handWidth;

                Palm palm = new Palm(palmHand, wristUpper, wristLower, fingersLower, fingersUpper);
                Palms.Add(palm);
                palmHand.setPalm(palm);

            }
        }
    }
}