using PamhagenSysCtrl.Helpers;
using System.IO;
using System.Reflection;
using System.Windows;
using System.Windows.Threading;

namespace PamhagenSysCtrl {
    public partial class App : Application {

        public static PamhagenPlant? Plant;
        public static Dispatcher? MainDispatcher;

        public static readonly string DataPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), "Anlagensteuerung Pamhagen");
        public static readonly string ConfigPath = Path.Combine(DataPath, "config.ini");
        public static readonly string InstallPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles), "Anlagensteuerung Pamhagen");
        public static readonly string TempPath = Path.Combine(Path.GetTempPath(), "Anlagensteuerung Pamhagen");

        public static Config Config { get; private set; } = new(ConfigPath);
        public static Version Version { get; private set; } = new();

        public App() :
            base() {
            Directory.CreateDirectory(TempPath);
            Directory.CreateDirectory(DataPath);
            MainDispatcher = Dispatcher;

            var args = Environment.GetCommandLineArgs();
            if (args.Length >= 2) {
                Config = new(Path.GetFullPath(args[1]));
            }
        }

        protected override async void OnStartup(StartupEventArgs evt) {
            Version = new Version(typeof(App).GetTypeInfo().Assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion.Split('+')[0] ?? "0.0.0");

            try {
                Plant = new(Config.PlcPort);
                await Plant.StartThread();
            } catch (Exception exc) {
                Plant?.Dispose();
                Plant = null;
                var str = $"Beim Aufbauen einer Verbindung zur SPS ist ein Fehler aufgetreten:\n\n{exc.GetType().Name}: {exc.Message}";
                if (exc.InnerException != null) str += $"\n\n{exc.InnerException.GetType().Name}: {exc.InnerException.Message}";
                MessageBox.Show(str, "SPS-Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
            }

            base.OnStartup(evt);
        }

        protected async void Application_Exit(object sender, ExitEventArgs evt) {
            Plant?.Dispose();
        }
    }
}