using System;
using System.Text;
using Autodesk.Revit.DB.Events;
using Autodesk.Revit.UI;
using Autodesk.Revit.UI.Events;
using FWindSoft.Events;

namespace FWindSoft.Revit
{
    [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
    [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
    [Autodesk.Revit.Attributes.Journaling(Autodesk.Revit.Attributes.JournalingMode.NoCommandData)]
    public class ExternalApplication : IExternalApplication
    {
        #region 构造函数
        public ExternalApplication()
        {
            Events = new EventsWrapper();
            Registers = new RevitRegisterManager(true);
        } 
        #endregion

        #region 私有相关
        /// <summary>
        /// 事件包装器（不是每一个事件都进行了包装）
        /// </summary>
        public EventsWrapper Events { get;private set; }
        private RevitRegisterManager Registers { get; set; }
        #endregion
        public static ExternalApplication CurrentApp{ get;private set; }
        public virtual Result OnStartup(UIControlledApplication application)
        {
            RevitVersion.AddInManager.CheckCancelAddin();
            CurrentApp = this;
            UIControlApp = application;
            #region 核心区，与ShutDown顺序相反相反
            #region 事件绑定
            Events.AddBindings(application);
            Events.AddBindings(application.ControlledApplication);
            #endregion
            Registers.AddEvents(this);
            AttachExecute(application);
            #endregion
            //加载application
            Idling += ExternalApplication_Idling;
            return Result.Succeeded;
        }

        /*此类由revit初始化
         */
        public virtual Result OnShutdown(UIControlledApplication application)
        {
            CurrentApp = null;
            UIControlApp = application;

            ShutExecute(application);
            Registers.RemoveEvents(this);
            #region 事件绑定
            Events.RemoveBindings(application);
            Events.RemoveBindings(application.ControlledApplication);
            #endregion      
         
            return Result.Succeeded;
        }

        private static void ExternalApplication_Idling(object sender, IdlingEventArgs e)
        {
            RevitCore.InitCore((UIApplication) sender);
            if (CurrentApp != null)
            {
                CurrentApp.Idling -= ExternalApplication_Idling;
            }
        }

        #region 属性相关
        /// <summary>
        /// 关联UIControlApp
        /// </summary>
        public UIControlledApplication UIControlApp { get; private set; }
        #endregion
        #region 事件相关扩展    
        public event EventHandler<IdlingEventArgs> Idling
        {
            add { Events["Idling"]?.AddEventHandler(value); }
            remove { Events["Idling"]?.RemoveEventHandler(value); }
        }
        public event EventHandler<DocumentOpenedEventArgs> DocumentOpened
        {
            add { Events["DocumentOpened"]?.AddEventHandler(value); }
            remove { Events["DocumentOpened"]?.RemoveEventHandler(value); }
        }
        #endregion

        #region 自定义扩展
        /// <summary>
        /// 附加启动时的初始化设置
        /// </summary>
        protected virtual void AttachExecute(UIControlledApplication application)
        {
            //读一个初始化的配置文件，然后顺序执行配置文件中的各项操作
            //1、定义一个命令度配置文件
            //2、根据配置文件中的相关设置，再进行执行
            DockableWindow win = new DockableWindow();
            win.RegisterDockableWindow(CurrentApp.UIControlApp, RevitCustomDockablePanels.Default);
        }

        /// <summary>
        /// 附加启动时的初始化设置
        /// </summary>
        protected virtual void ShutExecute(UIControlledApplication application)
        {
           
        }
        #endregion

        #region 未处理异常捕获
        /// <summary>
        /// 不会未处理异常
        /// </summary>
        protected void CatchUnhandledException()
        {
            AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
        }
        /// <summary>
        /// 去掉捕获未处理异常
        /// </summary>
        protected void NoCatchUnhandledException()
        {
            AppDomain.CurrentDomain.UnhandledException -= CurrentDomain_UnhandledException;
        }
        private static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            StringBuilder builder = new StringBuilder();
            var exception = e.ExceptionObject as Exception;
            if (exception != null)
            {
                builder.AppendLine("Messsage:" + exception.Message);
                builder.AppendLine("Trace:" + exception.StackTrace);
            }
            else
            {
                builder.Append("未处理异常");
            }
            TaskDialog.Show("捕获异常", builder.ToString());
        }
        #endregion
    }
}