using UnityEngine;
using UnityEngine.SceneManagement;
using System.Collections.Generic;
using OpenCVForUnity.CoreModule;
using OpenCVForUnity.ImgprocModule;
using OpenCVForUnity.UnityUtils;

namespace OpenCVForUnityExample
{
    /// <summary>
    /// MatchShapes Example
    /// http://docs.opencv.org/3.1.0/d5/d45/tutorial_py_contours_more_functions.html
    /// </summary>
    public class MatchShapesExample : MonoBehaviour
    {
        // Use this for initialization
        void Start()
        {
            //srcMat
            Texture2D srcTexture = Resources.Load("matchshapes") as Texture2D;
            Mat srcMat = new Mat(srcTexture.height, srcTexture.width, CvType.CV_8UC1);
            Utils.texture2DToMat(srcTexture, srcMat);
            Debug.Log("srcMat.ToString() " + srcMat.ToString());
            Imgproc.threshold(srcMat, srcMat, 127, 255, Imgproc.THRESH_BINARY);

            //dstMat
            Texture2D dstTexture = Resources.Load("matchshapes") as Texture2D;
            Mat dstMat = new Mat(dstTexture.height, dstTexture.width, CvType.CV_8UC3);
            Utils.texture2DToMat(dstTexture, dstMat);
            Debug.Log("dstMat.ToString() " + dstMat.ToString());


            List<MatOfPoint> srcContours = new List<MatOfPoint>();
            Mat srcHierarchy = new Mat();

            /// Find srcContours
            Imgproc.findContours(srcMat, srcContours, srcHierarchy, Imgproc.RETR_CCOMP, Imgproc.CHAIN_APPROX_NONE);

            Debug.Log("srcContours.Count " + srcContours.Count);

            for (int i = 0; i < srcContours.Count; i++)
            {
                Imgproc.drawContours(dstMat, srcContours, i, new Scalar(255, 0, 0), 2, 8, srcHierarchy, 0, new Point());
            }

            for (int i = 0; i < srcContours.Count; i++)
            {
                double returnVal = Imgproc.matchShapes(srcContours[1], srcContours[i], Imgproc.CV_CONTOURS_MATCH_I1, 0);
                Debug.Log("returnVal " + i + " " + returnVal);

                Point point = new Point();
                float[] radius = new float[1];
                Imgproc.minEnclosingCircle(new MatOfPoint2f(srcContours[i].toArray()), point, radius);
                Debug.Log("point.ToString() " + point.ToString());
                Debug.Log("radius.ToString() " + radius[0]);

                Imgproc.circle(dstMat, point, 5, new Scalar(0, 0, 255), -1);
                Imgproc.putText(dstMat, " " + returnVal, point, Imgproc.FONT_HERSHEY_SIMPLEX, 0.4, new Scalar(0, 255, 0), 1, Imgproc.LINE_AA, false);
            }


            Texture2D texture = new Texture2D(dstMat.cols(), dstMat.rows(), TextureFormat.RGBA32, false);

            Utils.matToTexture2D(dstMat, texture);

            gameObject.GetComponent<Renderer>().material.mainTexture = texture;
        }

        // Update is called once per frame
        void Update()
        {

        }

        /// <summary>
        /// Raises the back button click event.
        /// </summary>
        public void OnBackButtonClick()
        {
            SceneManager.LoadScene("OpenCVForUnityExample");
        }
    }
}