using Autodesk.Revit.UI;
using Autodesk.Revit.UI.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FWindSoft.Revit
{
    /// <summary>
    /// 守护命令【该命令队列，可控制是否移除】
    /// </summary>
    public class GuardianIdlingCommand : IRevitRegister
    {
        public  List<IdlingCommand> Commands { get; private set; }
        public  GuardianIdlingCommand()
        {
            Commands = new List<IdlingCommand>();
        }
        #region 关联命令
        /// <summary>
        /// 对接事件绑定
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public void ApplicaionIdling(object sender, IdlingEventArgs e)
        {
            var application = sender as UIApplication;
            foreach (var command in Commands)
            {
                command.Raise(application);
            }          
            e.SetRaiseWithoutDelay();
        }
        #endregion

        #region 操作命令
        //添加，移除
        public IdlingCommand AddExecute(Func<RevitEventArgs, HandlerResult> handler)
        {
            IdlingCommand command = new IdlingCommand(RevitHandlerFactory.CreateOnceHandler(handler));
            Commands.Add(command);
            return command;
        }
        public IdlingCommand AddExecute(IdlingCommand command)
        {
            if (command == null)
                return null;
            Commands.Add(command);
            return command;
        }

        public void RemoveExecute(IdlingCommand command)
        {
            if (command == null)
                return;
            Commands.Remove(command);
        }
        public void RemoveExecute(string commandName)
        {
            if (string.IsNullOrWhiteSpace(commandName))
                return;
            Commands.RemoveAll(command=>command.Handler?.Name==commandName);
        }
        #endregion


        #region 事件注册相关
        public void Register(ExternalApplication application)
        {
            application.Idling += ApplicaionIdling;
        }

        public void Unregister(ExternalApplication application)
        {
            application.Idling -= ApplicaionIdling;
        }
        #endregion
    }
}