using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using FRT.Models;
using FaceRecognitionDotNet;
using Microsoft.AspNetCore.Hosting;
using System.IO;

namespace FRT.Controllers
{
    public class HomeController : Controller
    {
        private readonly IHostingEnvironment _env;
        private FaceRecognition _FaceRecognition;

        public HomeController(IHostingEnvironment env)
        {
            this._env = env;
        }

        public IActionResult Index(string s, string t, int f = 1)
        {
            var result = 0;
            DateTime start;
            DateTime end;
            this._FaceRecognition = FaceRecognition.Create(Path.Combine(this._env.WebRootPath, "face"));
            //
            using (var image1 = FaceRecognition.LoadImageFile(Path.Combine(this._env.WebRootPath, "TestImages", $"{s}.jpg")))
            {
                using (var image2 = FaceRecognition.LoadImageFile(Path.Combine(this._env.WebRootPath, "TestImages", $"{t}.jpg")))
                {
                    var endodings1 = this._FaceRecognition.FaceEncodings(image1).ToArray();
                    var endodings2 = this._FaceRecognition.FaceEncodings(image2).ToArray();
                    start = DateTime.Now;
                    foreach (var encoding in endodings1)
                    {
                        for (int i = 0; i < f; i++)
                        {
                            foreach (var compareFace in FaceRecognition.CompareFaces(endodings2, encoding, 0.6))
                            {
                                result += compareFace ? 1 : 0;
                            }
                        }
                    }
                    end = DateTime.Now;
                    foreach (var encoding in endodings1)
                    {
                        encoding.Dispose();
                    }
                    foreach (var encoding in endodings2)
                    {
                        encoding.Dispose();
                    }
                }
            }

            //
            this._FaceRecognition.Dispose();
            return Content((end - start).TotalSeconds + " : " + result.ToString());
        }

        public IActionResult Privacy()
        {
            return View();
        }

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }
}