/*  
    This file is part of ContrAlto.

    ContrAlto is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    ContrAlto 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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with ContrAlto.  If not, see <http://www.gnu.org/licenses/>.
*/

using Contralto.SdlUI;
using System;
using System.Windows.Forms;

namespace Contralto
{
    class Program
    {
        [STAThread]
        static void Main(string[] args)
        {
            //
            // Check for command-line arguments. 
            // We expect at most one argument, specifying a configuration file to load.
            //
            StartupArgs = args;
            if (args.Length > 1)
            {
                Console.WriteLine("usage: Contralto <config file>");
                return;
            }

            // Handle command-line args
            PrintHerald();           

            _system = new AltoSystem();

            if (!String.IsNullOrEmpty(Configuration.Drive0Image))
            {
                try
                {
                    _system.LoadDrive(0, Configuration.Drive0Image);
                }
                catch(Exception e)
                {
                    Console.WriteLine("Could not load image '{0}' for drive 0.  Error '{1}'.", Configuration.Drive0Image, e.Message);
                    _system.UnloadDrive(0);
                }
            }

            if (!String.IsNullOrEmpty(Configuration.Drive1Image))
            {
                try
                {
                    _system.LoadDrive(1, Configuration.Drive1Image);
                }
                catch (Exception e)
                {
                    Console.WriteLine("Could not load image '{0}' for drive 1.  Error '{1}'.", Configuration.Drive1Image, e.Message);
                    _system.UnloadDrive(1);
                }
            }

            //
            // Attach handlers so that we can properly flush state if we're terminated.
            //
            AppDomain.CurrentDomain.ProcessExit += OnProcessExit;

            //
            // Invoke the main UI window; this will run until the user closes it, at which
            // point we are done.
            //

            if (Configuration.Platform == PlatformType.Windows)
            {
                using (AltoWindow mainWindow = new AltoWindow())
                {
                    mainWindow.AttachSystem(_system);
                    Application.Run(mainWindow);
                }
            }
            else
            {
                using (SdlAltoWindow mainWindow = new SdlAltoWindow())
                {
                    // Invoke the command-line console
                    SdlConsole console = new SdlConsole(_system);
                    console.Run(mainWindow);

                    // Start the SDL display running.
                    mainWindow.AttachSystem(_system);
                    mainWindow.Run();
                }
            }
        }

        public static string[] StartupArgs;

        private static void OnProcessExit(object sender, EventArgs e)
        {
            Console.WriteLine("Exiting...");

            //
            // Save disk contents
            //
            _system.CommitDiskPack(0);
            _system.CommitDiskPack(1);
            
            _system.Shutdown();

            //
            // Commit current configuration to disk
            //
            Configuration.WriteConfiguration();
        }

        private static void PrintHerald()
        {
            Console.WriteLine("ContrAlto v{0} (c) 2015-2017 Living Computers: Museum+Labs.", typeof(Program).Assembly.GetName().Version);
            Console.WriteLine("Bug reports to joshd@livingcomputers.org");
            Console.WriteLine();
        }      
        
        private static AltoSystem _system;
    }
}