using Sarand.PatientMgr.Core.App;
using Sarand.Core.App;
using Sarand.Core.Base;
using Sarand.PatientMgr.App.Forms;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
using Sarand.PatientMgr.Win.Forms.App;

namespace Sarand.PatientMgr.App
{
	//=======================================================================
	static class Program
	{
		//-------------------------------------------------------------------
		// Definitions.
		[System.Runtime.InteropServices.DllImport("user32.dll")]
		private static extern bool SetProcessDPIAware ();

		//-------------------------------------------------------------------
		// Data members.
		private static Form mainForm = null;

		//-------------------------------------------------------------------
		/// <summary>The main entry point for the application.</summary>
		[STAThread]
		static void Main (string[] args)
		{
			bool runningProcesses = false;
			try
			{
				// Parse command line.
				SacsCommandLineInfo CmdLineInfo = new SacsCommandLineInfo(args);
				bool runProcesses = (CmdLineInfo.ProcessDefinitions.Count > 0);

				// PatientMgr Application.
				String logMessageSuffix = (runProcesses ? " [auto]" : "");
				using (var app = new SaPatientMgrApp(Spm.ApplicationCaption + " Start v" + Spm.Version + logMessageSuffix))
				{
					// Check for startup error.
					if (app.HasErrorState())
					{
						MessageBox.Show("Startup error: " + app.ErrorStateMessage, Spm.ApplicationCaption, MessageBoxButtons.OK, MessageBoxIcon.Error);
						return;
					}

					// Trap thread and unhandled exceptions.
					var threadExceptionHandler = new ThreadExceptionEventHandler(Application_ThreadException);
					Application.ThreadException += threadExceptionHandler;
					var unhandledExceptionHandler = new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
					AppDomain.CurrentDomain.UnhandledException += unhandledExceptionHandler;

					if (runProcesses)
					{
						// Run specified processes and close application.
						runningProcesses = true;
						/*
						foreach (SacsProcessDefinition processDfn in CmdLineInfo.ProcessDefinitions)
							SpmProcessConsole.InvokeProcessDefinition(app.SessionContext, processDfn, app.UserContext.DbUpdateInfo);
						*/
					}
					else
					{
						// Configure application.
						SetProcessDPIAware();
						Application.EnableVisualStyles();
						Application.SetCompatibleTextRenderingDefault(false);

						Application.EnableVisualStyles();
						Application.SetCompatibleTextRenderingDefault(false);

						// Main form.
						SaPatientMgrForm.Config configMainForm = new SaPatientMgrForm.Config();
						using (Form form = new SaPatientMgrForm(configMainForm))
						{
							mainForm = form;
							Application.Run(form);
							mainForm = null;
						}
						Application.ThreadException -= threadExceptionHandler;
						Logger.Info(Spm.ApplicationCaption + " End" + logMessageSuffix, true);
					}
				}
			}
			catch (Exception exc)
			{
				String exceptionName = exc.GetType().Name + (exc.InnerException != null ? " (" + exc.InnerException.GetType().Name + ")" : "");
				if (!runningProcesses)
					MessageBox.Show(exceptionName + " encountered:\n\n" + exc.Message + "\n\nApplication will close.");
				Logger.Warn(exceptionName + ": " + exc.Message + exc.GetStackEntries(6).Concat("", "\n\t"), true);
			}
			finally
			{
				Application.Exit();
			}
		}

		//-------------------------------------------------------------------
		// Trap thread exceptions.
		// Ref: https://stackoverflow.com/questions/36014/why-is-net-exception-not-caught-by-try-catch-block
		// See: References to Application.ThreadException above.
		public class ThreadException : Exception
		{
			public ThreadException (String message, Exception innerException) :
				base(message, innerException)
			{ }
		}
		public static void Application_ThreadException (object sender, ThreadExceptionEventArgs e)
		{
			Exception exc = e.Exception;
			Logger.Error("Application_ThreadException " + exc.GetType().Name + ": " + exc.Message + ExceptionUtil.GetStackEntries(exc, 20).Concat("", "\n\t"), true);
			if (!SacsSystem.DebugMode)
			{
				// Throw on main thread.
				if (mainForm != null && mainForm.InvokeRequired) mainForm.Invoke((MethodInvoker)delegate { throw exc; });
				else throw exc; // new ThreadException(exc.Message, exc);
			}
		}

		//-------------------------------------------------------------------
		// Trap unhandled exceptions.
		// Ref: https://msdn.microsoft.com/en-us/library/system.windows.forms.application.threadexception(v=vs.110).aspx
		// See: References to Application.ThreadException above.
		public class UnhandledException : Exception
		{
			public UnhandledException (String message, Exception innerException) :
				base(message, innerException)
			{ }
		}
		public static void CurrentDomain_UnhandledException (object sender, UnhandledExceptionEventArgs e)
		{
			Exception exc = e.ExceptionObject as Exception;
			Logger.Error("CurrentDomain_UnhandledException " + exc.GetType().Name + ": " + exc.Message + ExceptionUtil.GetStackEntries(exc, 20).Concat("", "\n\t"));
			if (!SacsSystem.DebugMode)
			{
				// Throw on main thread.
				if (mainForm != null && mainForm.InvokeRequired) mainForm.Invoke((MethodInvoker)delegate { throw exc; });
				else throw exc; // new UnhandledException(exc.ToString(), exc);
			}
		}

		//-------------------------------------------------------------------
	}
	//=======================================================================
}