using Microsoft.AspNetCore.Mvc;
using rPiNVR.Models;
using System.Diagnostics;
using System.Diagnostics.Metrics;
using System.IO;

namespace rPiNVR.Controllers
{
    public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;
        private List<Camera> _avail;

        public HomeController(ILogger<HomeController> logger)
        {
            _logger = logger;
            string[] lines = System.IO.File.ReadAllLines("available.list");
            _avail = new List<Camera>();
            _avail.Add(new Camera(9999, "Empty"));
            foreach (var line in lines)
            {
                string[] cameraDetails = line.Split(',');
                _avail.Add(new Camera(int.Parse(cameraDetails[0]), cameraDetails[1]));
            }
    }

        

        [HttpGet]

        public IActionResult Index()
        {
            /*AvailableCameras avail = new AvailableCameras();
             ViewData["available"] = avail.Cameras*/
            ViewData["available"] = _avail;
            List<int> cams = new List<int>();
            using (StreamReader file = new StreamReader("cam.list"))
            {
                string ln;
                while ((ln = file.ReadLine()) != null)
                {
                    int cam;
                    bool b = int.TryParse(ln, out cam);
                    if (!b)
                    {
                        _logger.LogError("Invalid file format of cam.list", file);
                        break;
                    }

                    cams.Add(cam);

                }
                file.Close();
            }
            return View(cams);
        }

        [HttpPost]
        public IActionResult Index(List<int> cams)
        {
            /*AvailableCameras avail = new AvailableCameras();
            ViewData["available"] = avail.Cameras;*/
            ViewData["available"] = _avail;

            using (StreamWriter file = new StreamWriter("cam.list"))
            {
                foreach (int cam in cams)
                {
                    file.WriteLine(cam);
                }
                file.Flush();
                file.Close();
            }

            using (StreamWriter file = new StreamWriter("cam.cfg"))
            {
                int numCols = 1;
                int numRows = 1;
                if (cams.Count > 1)
                {
                    numCols = cams.Count / 2;
                    numRows = 2;
                }

                file.WriteLine($"NUM_COLS={numCols}");
                file.WriteLine($"NUM_ROWS={numRows}");

                file.Flush();
                file.Close();
            }

            ProcessStartInfo startInfo = new ProcessStartInfo() { FileName = "/bin/bash", Arguments = "rtspnvr.sh start", };
            Process proc = new Process() { StartInfo = startInfo, };
            proc.Start();

            return View(cams);
        }
        
        public IActionResult StopCameras()
        {
            ProcessStartInfo startInfo = new ProcessStartInfo() { FileName = "/bin/bash", Arguments = "rtspnvr.sh stop", };
            Process proc = new Process() { StartInfo = startInfo, };
            proc.Start();
            return RedirectToAction("Index");
        }

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