#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using HeuristicLab.PluginInfrastructure;
using HeuristicLab.PluginInfrastructure.UI;

namespace HeuristicLab {
  static class Program {
    [STAThread]
    /// <summary>
    /// Main entry point of the plugin infrastructure. Loads the starter form.
    /// </summary>
    /// <param name="args">Command line arguments</param>
    static void Main(string[] args) {
      if ((!FrameworkVersionErrorDialog.NET4_5Installed && !FrameworkVersionErrorDialog.MonoInstalled)
        || (FrameworkVersionErrorDialog.MonoInstalled && !FrameworkVersionErrorDialog.MonoCorrectVersionInstalled)) {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new FrameworkVersionErrorDialog());
      } else {
        try {
          Application.EnableVisualStyles();
          Application.SetCompatibleTextRenderingDefault(false);

          string pluginPath = Path.GetFullPath(Application.StartupPath);

          var pluginManager = new PluginManager(pluginPath);

          var splashScreen = new SplashScreen("Loading plugins...", 3000);
          pluginManager.Initializing += (sender, eventArgs) => splashScreen.UpdateMessage("Loading plugins...");
          pluginManager.PluginLoaded += (sender, eventArgs) => splashScreen.UpdateMessage("Loaded " + eventArgs.Entity.ToString());
          pluginManager.ApplicationStarting += (sender, eventArgs) => splashScreen.UpdateMessage("Starting " + eventArgs.Entity.ToString());
          pluginManager.ApplicationStarted += (sender, eventArgs) => splashScreen.UpdateMessage("Started " + eventArgs.Entity.ToString());


          DiscoverPluginsAndRunOptimizerAsync(pluginManager, args);

          Application.Run(splashScreen);
        } catch (Exception ex) {
          MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
      }
    }

    private static void DiscoverPluginsAndRunOptimizerAsync(PluginManager pluginManager, string[] args) {
      // STAThread is necessary for a UI component we are using in the application
      var t = new Thread(() => {
        try {
          pluginManager.DiscoverAndCheckPlugins();
          var optimizerApp = pluginManager.Applications.FirstOrDefault(app => app.Name == "Optimizer");
          pluginManager.Run(optimizerApp, CommandLineArgumentHandling.GetArguments(args));
        } catch (Exception ex) {
          MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
      });

      // cannot use a task because we need to set STA
      t.SetApartmentState(ApartmentState.STA);
      t.Start();
    }
  }
}