using System;
using System.Drawing;
using System.Reflection;
using System.Threading;
using System.Windows.Forms;

namespace analog_system_monitor
{
    public class TrayApp : ApplicationContext
    {
        private NotifyIcon trayIcon;
        private Thread workerThread;
        private bool running = true;

        public TrayApp()
        {
            trayIcon = new NotifyIcon()
            {
                Icon = LoadEmbeddedIcon(),
                Text = "Analog System Monitor",
                Visible = true,
                ContextMenuStrip = BuildMenu()
            };

            workerThread = new Thread(WorkerLoop)
            {
                IsBackground = true
            };
            workerThread.Start();
        }

        private Icon LoadEmbeddedIcon()
        {
            var assembly = Assembly.GetExecutingAssembly();
            var resourceName = "analog_system_monitor.telemetry_icon.ico";

            using var stream = assembly.GetManifestResourceStream(resourceName);
            if (stream == null)
            {
                MessageBox.Show("Embedded icon not found: " + resourceName);
                return SystemIcons.Application;
            }

            return new Icon(stream);
        }

        private ContextMenuStrip BuildMenu()
        {
            var menu = new ContextMenuStrip();

            var exitItem = new ToolStripMenuItem("Exit");
            exitItem.Click += (s, e) => ExitApp();

            menu.Items.Add(exitItem);
            return menu;
        }

        private void WorkerLoop()
        {
            var telemetry = new Telemetry();
            telemetry.Initialize();

            while (running)
            {
                telemetry.UpdateAndSend();
                Thread.Sleep(telemetry.UpdateRateMs);
            }
        }

        private void ExitApp()
        {
            running = false;

            try
            {
                workerThread?.Join(500);
            }
            catch { }

            trayIcon.Visible = false;
            trayIcon.Dispose();

            Application.Exit();
        }
    }
}