#region Disclaimer / License

// Copyright (C) 2010, Jackie Ng
// http://trac.osgeo.org/mapguide/wiki/maestro, jumpinjackie@gmail.com
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//

#endregion Disclaimer / License

using ICSharpCode.Core;
using Maestro.Base.Services;
using Maestro.Base.UI;
using Maestro.Base.UI.Preferences;
using Maestro.Editors.Generic;
using Maestro.Editors.LayerDefinition;
using Maestro.Editors.Preview;
using Maestro.Shared.UI;
using System;
using System.Diagnostics;
using System.Windows.Forms;

namespace Maestro.Base.Events
{
    internal static class EventWatcher
    {
        private static Timer _keepAliveTimer;

        internal static void Initialize()
        {
            _keepAliveTimer = new Timer();
            _keepAliveTimer.Interval = 60000;
            _keepAliveTimer.Tick += OnKeepAliveTimerElapsed;
            var svc = ServiceRegistry.GetService<ServerConnectionManager>();
            Debug.Assert(svc != null);
            PropertyService.PropertyChanged += OnAppPropertyChanged;

            svc.ConnectionAdded += new ServerConnectionEventHandler(OnConnectionAdded);
            svc.ConnectionRemoved += new ServerConnectionEventHandler(OnConnectionRemoved);

            //Apply initial settings
            PreviewSettings.UseLocalPreview = PropertyService.Get(ConfigProperties.UseLocalPreview, ConfigProperties.DefaultUseLocalPreview);
            PreviewSettings.AddDebugWatermark = PropertyService.Get(ConfigProperties.AddDebugWatermark, ConfigProperties.DefaultAddDebugWatermark);
            PreviewSettings.UseAjaxViewer = PropertyService.Get(ConfigProperties.PreviewViewerType, ConfigProperties.DefaultPreviewViewerType) == "AJAX";
            LayerEditorSettings.UseGridEditor = PropertyService.Get(ConfigProperties.UseGridStyleEditor, ConfigProperties.DefaultUseGridStyleEditor);
            XmlEditorSettings.XsdPath = PropertyService.Get(ConfigProperties.XsdSchemaPath, ConfigProperties.DefaultXsdSchemaPath);

            LoggingService.Info("Starting session keep-alive timer"); //NOXLATE
            _keepAliveTimer.Start();
        }

        private static void OnAppPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            switch (e.Key)
            {
                case ConfigProperties.UseLocalPreview:
                    PreviewSettings.UseLocalPreview = Convert.ToBoolean(e.NewValue);
                    LoggingService.Info($"Use Local Preview setting is now: {PreviewSettings.UseLocalPreview}"); //NOXLATE
                    break;

                case ConfigProperties.AddDebugWatermark:
                    PreviewSettings.AddDebugWatermark = Convert.ToBoolean(e.NewValue);
                    LoggingService.Info($"Add Debug Watermark setting is now: {PreviewSettings.AddDebugWatermark}"); //NOXLATE
                    break;

                case ConfigProperties.PreviewViewerType:
                    PreviewSettings.UseAjaxViewer = (e.NewValue.ToString() == "AJAX"); //NOXLATE
                    LoggingService.Info($"Use AJAX Viewer setting is now: {PreviewSettings.UseAjaxViewer}"); //NOXLATE
                    break;

                case ConfigProperties.UseGridStyleEditor:
                    LayerEditorSettings.UseGridEditor = Convert.ToBoolean(e.NewValue);
                    LoggingService.Info($"Use Grid Style Editor is now: {LayerEditorSettings.UseGridEditor}"); //NOXLATE
                    break;

                case ConfigProperties.XsdSchemaPath:
                    XmlEditorSettings.XsdPath = e.NewValue.ToString();
                    LoggingService.Info($"XSD path is now: {XmlEditorSettings.XsdPath}"); //NOXLAT
                    break;
            }
        }

        private static bool smShowingError = false;

        private static void OnKeepAliveTimerElapsed(object sender, EventArgs e)
        {
            var svc = ServiceRegistry.GetService<ServerConnectionManager>();
            foreach (var name in svc.GetConnectionNames())
            {
                var conn = svc.GetConnection(name);
                if (conn.ProviderName.ToUpper().Equals("MAESTRO.LOCAL")) //NOXLATE
                    continue;

                string sessionId = conn.SessionID;
                if (!string.IsNullOrEmpty(sessionId))
                {
                    try
                    {
                        conn.FeatureService.GetProviderCapabilities("OSGeo.SDF"); //NOXLATE
                        LoggingService.Info($"Session kept alive: {sessionId}"); //NOXLATE
                    }
                    catch (Exception)
                    {
                        if (smShowingError)
                            return;

                        try
                        {
                            smShowingError = true;
                            MessageService.ShowError(string.Format(Strings.KeepAliveFailed, sessionId));
                        }
                        finally
                        {
                            smShowingError = false;
                        }
                    }
                }
            }
        }

        private static void OnConnectionRemoved(object sender, ServerConnectionEventArgs e)
        {
            Workbench wb = Workbench.Instance;
            Debug.Assert(wb.ActiveSiteExplorer != null);
            var svc = ServiceRegistry.GetService<ServerConnectionManager>();
            LoggingService.Info($"There are now {svc.GetConnectionNames().Count} active connections");  //NOXLATE
            //Debug.Assert(wb.ActiveSiteExplorer.ConnectionName == name);
        }

        private static void OnConnectionAdded(object sender, ServerConnectionEventArgs e)
        {
            var wb = Workbench.Instance;
            if (wb.ActiveSiteExplorer == null)
            {
                var viewMgr = ServiceRegistry.GetService<ViewContentManager>();

                wb.ActiveSiteExplorer = viewMgr.OpenContent(Strings.Content_SiteExplorer,
                                        Strings.Content_SiteExplorer,
                                        ViewRegion.Left,
                                        () => { return new SiteExplorer(); });

                wb.ActiveSiteExplorer.ActiveConnectionChanged += new EventHandler(OnActiveConnectionChanged);

                var connMgr = ServiceRegistry.GetService<ServerConnectionManager>();
                var openMgr = ServiceRegistry.GetService<OpenResourceManager>();
                var siteExp = wb.ActiveSiteExplorer;

                var nav = new ResourceIdNavigator(connMgr, openMgr, viewMgr, siteExp);
                wb.AddToolbar("Resource ID Bar", nav.NavigatorToolStrip, ToolbarRegion.Top, true);
            }

            wb.ActiveSiteExplorer.RefreshModel(e.ConnectionName);

            var svc = ServiceRegistry.GetService<ServerConnectionManager>();
            var conn = svc.GetConnection(e.ConnectionName);

            LoggingService.Info($"There are now {svc.GetConnectionNames().Count} active connections"); //NOXLATE
        }

        private static void OnActiveConnectionChanged(object sender, EventArgs e)
        {
            var wb = Workbench.Instance;
            var exp = wb.ActiveSiteExplorer;
            if (exp != null)
            {
                wb.SetStatusLabel(string.Format(Strings.StatusActiveConnection, exp.ConnectionName));
            }
            else
            {
                wb.SetStatusLabel(string.Empty);
            }
        }
    }
}