/* Ribbon.cs
 * part of zaaReloaded2
 * 
 * Copyright 2015 Daniel Kraus
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Windows;
using System.Drawing;
using System.Windows.Resources;
using Office = Microsoft.Office.Core;
using zaaReloaded2.Views;
using zaaReloaded2.ViewModels;
using zaaReloaded2.Importer.ZaaImporter;
using zaaReloaded2.Formatter;
using zaaReloaded2.Controller;
using Word = Microsoft.Office.Interop.Word;
using Bovender.Mvvm.Actions;

// TODO:  Follow these steps to enable the Ribbon (XML) item:

// 1: Copy the following code block into the ThisAddin, ThisWorkbook, or ThisDocument class.

//  protected override Microsoft.Office.Core.IRibbonExtensibility CreateRibbonExtensibilityObject()
//  {
//      return new Ribbon();
//  }

// 2. Create callback methods in the "Ribbon Callbacks" region of this class to handle user
//    actions, such as clicking a button. Note: if you have exported this Ribbon from the Ribbon designer,
//    move your code from the event handlers to the callback methods and modify the code to work with the
//    Ribbon extensibility (RibbonX) programming model.

// 3. Assign attributes to the control tags in the Ribbon XML file to identify the appropriate callback methods in your code.  

// For more information, see the Ribbon XML documentation in the Visual Studio Tools for Office Help.


namespace zaaReloaded2
{
    [ComVisible(true)]
    public class Ribbon : Office.IRibbonExtensibility
    {
        #region Constructor

        public Ribbon()
        {
        }

        #endregion

        #region IRibbonExtensibility Members

        public string GetCustomUI(string ribbonID)
        {
            return GetResourceText("zaaReloaded2.Ribbon.xml");
        }

        #endregion

        #region Ribbon Callbacks
        //Create callback methods here. For more information about adding callback methods, visit http://go.microsoft.com/fwlink/?LinkID=271226

        public void Ribbon_Load(Office.IRibbonUI ribbonUI)
        {
            _ribbon = ribbonUI;
            Microsoft.Office.Interop.Word.Application word = Globals.ThisAddIn.Application;
            word.WindowSelectionChange += Application_WindowSelectionChange;
        }

        /// <summary>
        /// Handles ribbon button clicks. This method also contains the try...catch
        /// structure that invokes the central exception handler in the event of an
        /// exception.
        /// </summary>
        /// <param name="control"></param>
        public void Ribbon_Click(Office.IRibbonControl control)
        {
            try
            {
                switch (control.Id)
                {
                    case "zrlFormat":
                        DoFormat();
                        break;
                    case "zrlSettings":
                        DoChooseSettings();
                        break;
                    case "zrlAbout":
                        ViewModels.AboutViewModel vm = new ViewModels.AboutViewModel();
                        vm.InjectInto<Views.AboutView>().ShowDialog();
                        break;
                    case "zrlDaniel":
                        Formatter.DanielsStyle.Apply(
                            Globals.ThisAddIn.Application.ActiveDocument,
                            Globals.ThisAddIn.Application.Selection);
                        break;
                    case "zrlDemo":
                        DoLoadDemo();
                        break;
                    default:
                        throw new InvalidOperationException("No operation defined for " + control.Id);
                }
            }
            catch (Exception e)
            {
                Bovender.ExceptionHandler.CentralHandler.Manage(this, e);
            }
        }

        /// <summary>
        /// Returns an Image object for the ribbon.
        /// </summary>
        /// <remarks>
        /// The image file is expected to be a WPF resource file, not an embedded resource.
        /// To be consistent accross the application which uses WPF resources for its WPF
        /// windows, all images are to be built as resources rather than embedded resources.
        /// </remarks>
        /// <param name="imageId">The file name (without path) of the image.</param>
        /// <returns>Image object</returns>
        public object Ribbon_LoadImage(string imageId)
        {
            string initPackScheme = System.IO.Packaging.PackUriHelper.UriSchemePack;
            StreamResourceInfo sri = Application.GetResourceStream(
                new Uri(@"pack://application:,,,/zaaReloaded2;component/Icons/" + imageId));
            return Image.FromStream(sri.Stream);
        }

        public bool Daniel_GetVisible(Office.IRibbonControl control)
        {
            switch (Environment.UserName.ToUpper())
            {
                case "DANIEL":
                case "KRAUS_D1":
                    return true;
                default:
                    return false;
            }
        }

        /// <summary>
        /// Returns true if there is at least one paragraph selected.
        /// </summary>
        /// <remarks>
        /// The Selection object in Word is a bit tricky: Its Length property
        /// is never 0, because even if no text passage is selected, the character
        /// after the cursor is the content of the Selection.
        /// </remarks>
        public bool CanFormat(Office.IRibbonControl control)
        {
            return Globals.ThisAddIn.Application.ActiveDocument != null;
            //Word.Selection s = Globals.ThisAddIn.Application.ActiveWindow.Selection;
            //return s.Paragraphs.Count > 1 || 
            //    (s.Text.Length > 1 && s.Text.EndsWith("\r"));
        }

        #endregion

        #region Private methods

        void DoFormat()
        {
            // If no "real" selection exists, attempt to auto-detect the lab data.
            // (NB Technically, there is never _no_ selection in a document.)
            Word.Window activeWindow = Globals.ThisAddIn.Application.ActiveWindow;
            Word.Selection sel = activeWindow.Selection;
            if (!(sel.Paragraphs.Count > 1
                || (sel.Text.Length > 1 && sel.Text.EndsWith("\r"))))
            {
                if (!AutoDetect.Detect(activeWindow.Document))
                {
                    NotificationAction a = new NotificationAction();
                    a.Caption = "Formatieren nicht möglich";
                    a.Message = "Das Dokument scheint keine Lauris-Labordaten zu enthalten.";
                    a.OkButtonLabel = "Schließen";
                    a.Invoke();
                    return;
                }
            }

            if (CanFormat(null))
            {
                SettingsRepository repository = SettingsRepository.Load();
                Guid lastSettingsUid = Properties.Settings.Default.LastSettings;
                Settings lastSettings = repository.FindByGuid(lastSettingsUid);
                if (lastSettings != null)
                {
                    DoFormat(lastSettings);
                }
                else
                {
                    DoChooseSettings();
                }
            }
        }

        void DoFormat(Settings settings)
        {
            ZaaImporter importer = new ZaaImporter();
            importer.Import(Globals.ThisAddIn.Application.ActiveWindow.Selection.Text);
            Formatter.Formatter formatter = new Formatter.Formatter(
                Globals.ThisAddIn.Application.ActiveDocument);
            formatter.Settings = settings;
            formatter.Laboratory = importer.Laboratory;
            try
            {
                formatter.Run();
            }
            catch (NoLaboratoryDataException)
            {
                NotificationAction a = new NotificationAction();
                a.Caption = "Formatieren nicht möglich";
                a.Message = "Die aktuelle Markierung scheint keine Labordaten zu enthalten.";
                a.OkButtonLabel = "Schließen";
                a.Invoke();
            }
        }

        void DoChooseSettings()
        {
            SettingsRepository repository = SettingsRepository.Load();
            SettingsRepositoryViewModel vm = new SettingsRepositoryViewModel(repository);
            vm.UseSettingsMessage.Sent += (sender, args) =>
            {
                SettingsViewModel settingsVM = args.Content.ViewModel as SettingsViewModel;
                Settings settings = settingsVM.RevealModelObject() as Settings;
                DoFormat(settings);
                Properties.Settings.Default.LastSettings = settings.Uid;
                Properties.Settings.Default.Save();
            };
            vm.InjectInto<SettingsRepositoryView>().ShowDialog();
        }

        /// <summary>
        /// Loads the embedded demo document.
        /// </summary>
        /// <remarks>
        /// If Word is running in an embedded environment (e.g. in the ZAA),
        /// adding a document causes a COMException. Unfortunately, it is
        /// not trivial to test if Word is running embedded, so we use a
        /// try...catch structure and catch all COMExceptions. The error
        /// message might be not quite right if the exception was caused by
        /// a different problem.
        /// See http://davecra.com/2013/04/10/how-to-determine-if-an-excel-workbook-is-embedded-and-more
        /// </remarks>
        void DoLoadDemo()
        {
            try
            {
                Demo.Demo.OpenDemoDocument();
            }
            catch (System.Runtime.InteropServices.COMException e)
            {
                // HRESULT comparison according to http://stackoverflow.com/a/1426198/270712
                // Fix for exception ID 65a5c34e
                if (e.ErrorCode == unchecked((int)0x800A11FD))
                {
                    NotificationAction a = new NotificationAction();
                    a.Caption = "Kann Demo-Dokument nicht laden";
                    a.Message = "Das Demo-Dokument kann nicht geladen werden, "
                        + "wenn Word in der Zentralen Arztbriefablage ausgeführt wird.\r"
                        + "Bitte Word als eigenständige Anwendung starten und dann "
                        + "noch einmal versuchen.";
                    a.OkButtonLabel = "Schließen";
                    a.Invoke();
                }
                else
                {
                    throw;
                }
            }

        }

        public void Application_WindowSelectionChange(Microsoft.Office.Interop.Word.Selection Sel)
        {
            _ribbon.Invalidate();
        }

        #endregion

        #region Helpers

        private static string GetResourceText(string resourceName)
        {
            Assembly asm = Assembly.GetExecutingAssembly();
            string[] resourceNames = asm.GetManifestResourceNames();
            for (int i = 0; i < resourceNames.Length; ++i)
            {
                if (string.Compare(resourceName, resourceNames[i], StringComparison.OrdinalIgnoreCase) == 0)
                {
                    using (StreamReader resourceReader = new StreamReader(asm.GetManifestResourceStream(resourceNames[i])))
                    {
                        if (resourceReader != null)
                        {
                            return resourceReader.ReadToEnd();
                        }
                    }
                }
            }
            return null;
        }

        #endregion

        #region Fields

        private Office.IRibbonUI _ribbon;

        #endregion
    }
}