using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using OpenCVForUnity.CoreModule;
using UnityEngine;
using Vuforia;
using Newtonsoft.Json;
using OpenCVForUnity.Calib3dModule;
using OpenCVForUnity.ImgprocModule;
using OpenCVForUnity.ImgcodecsModule;

public class HomographyPoints
{
    public List<List<float>> src_points { get; set; }
    public List<List<float>> dst_points { get; set; }
}

public class python_test : MonoBehaviour
{
    Mat camImageMat;
    readonly int baselineWidth = 1500;
    readonly int baselineHeight = 1500;
    Mat loadedImage;

    // Start is called before the first frame update
    void Start()
    {

        loadedImage = Imgcodecs.imread("/Users/alexandermunch-hansen/projects/chess_stuff/advancedskrald/whole_boards/boards_for_empty/board_1554285984.187497_rank_4.png");

    }


    string runCmd(Mat image)
    {
        var buffer = new MatOfByte();
        OpenCVForUnity.ImgcodecsModule.Imgcodecs.imencode(".png", camImageMat, buffer);
        string base64 = Convert.ToBase64String(buffer.toArray());


        ProcessStartInfo start = new ProcessStartInfo();
        start.FileName = "/Users/alexandermunch-hansen/.virtualenvs/cv/bin/python3";
        var cmd = "/Users/alexandermunch-hansen/projects/chess_stuff/advancedskrald/adapter.py";
        //var cmd = "/Users/alexandermunch-hansen/projects/FuckCSharp/AR-Course/AR-3/Assets/tester.py";
        var args = "";
        start.Arguments = string.Format("\"{0}\" \"{1}\"", cmd, args);
        start.UseShellExecute = false;// Do not use OS shell
        start.CreateNoWindow = true; // We don't need new window
        start.RedirectStandardInput = true;
        start.RedirectStandardOutput = true;// Any output, generated by application will be redirected back
        start.RedirectStandardError = true; // Any error in standard output will be redirected back (for example exceptions)
        using (Process process = Process.Start(start))
        {
            using (StreamWriter writer = process.StandardInput)
            {
                writer.WriteLine(base64);
                //writer.WriteLine("lol" + writer.NewLine);
                writer.Close();
            }

            process.WaitForExit();

            string err = process.StandardError.ReadToEnd();
            print(err);

            using (StreamReader reader = process.StandardOutput)
            {
                string result = reader.ReadLine();

                return (string) result;
            }
        }
    }

    // Update is called once per frame
    void Update()
    {
        Image camImg = CameraDevice.Instance.GetCameraImage(Image.PIXEL_FORMAT.RGBA8888);
        Mat outputMat = null;
        if (camImg != null)
        {
            if (camImageMat == null)
            {
                camImageMat = new Mat(camImg.Height, camImg.Width, CvType.CV_8UC4);
            }
            camImageMat.put(0, 0, camImg.Pixels);
            if (Input.GetKeyDown("space"))
            {

                /*
                var camImgCopy = camImageMat.clone();
                outputMat = camImageMat.clone();
                */

                print("------------------------------------");
                print(loadedImage.size());

                var camImgCopy = loadedImage.clone();
                outputMat = camImgCopy.clone();
                camImageMat = loadedImage.clone();

                print("------------------------------------");


                var pls = runCmd(camImageMat);

                print(pls);

                HomographyPoints homographyPoints = JsonConvert.DeserializeObject<HomographyPoints>(pls);

                print(homographyPoints.src_points);

                MatOfPoint2f imagePoints = new MatOfPoint2f();
                imagePoints.alloc(homographyPoints.src_points.Count);
                print(homographyPoints.src_points.Count);


                MatOfPoint2f dstPoints = new MatOfPoint2f();
                dstPoints.alloc(homographyPoints.dst_points.Count);


                for (int i = 0; i < homographyPoints.src_points.Count; i++)
                {
                    imagePoints.put(i, 0, (int) homographyPoints.src_points[i][0],  (int) homographyPoints.src_points[i][1]);
                }

                for (int i = 0; i < homographyPoints.dst_points.Count; i++)
                {

                    dstPoints.put(i, 0, (int) homographyPoints.dst_points[i][0], (int) homographyPoints.dst_points[i][1]);
                }

                var homography = Calib3d.findHomography(imagePoints, dstPoints, Calib3d.RANSAC);

                Imgproc.warpPerspective(camImgCopy, outputMat, homography, new Size(baselineWidth, baselineHeight));

                imagePoints.Dispose();
                dstPoints.Dispose();

            }

            if (outputMat != null)
                MatDisplay.DisplayMat(outputMat, MatDisplaySettings.FULL_BACKGROUND);
        }
    }


}