using System;
using System.Collections.Generic;
using System.Text;

using Autodesk.Revit.DB;

namespace ShrlAlgoToolkit.RevitCore.Base
{
    public abstract class BaseCommand : IExternalCommand
    {
        // 封装常用属性，方便直接调用
        public ExternalCommandData CommandData { get; private set; }
        public UIApplication UiApplication => CommandData?.Application;
        public UIDocument UiDocument => UiApplication?.ActiveUIDocument;
        public Autodesk.Revit.ApplicationServices.Application Application => UiApplication?.Application;
        public Document Document => UiDocument?.Document;

        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            CommandData = commandData;

            try
            {
                ExecuteCommand();
                return Result.Succeeded;
            }
            catch (OperationCanceledException)
            {
                return Result.Cancelled;
            }
            catch (Exception ex)
            {
                message = ex.Message;
                TaskDialog.Show("Command Error", ex.ToString());
                return Result.Failed;
            }
        }

        // 留给具体命令去实现的核心方法
        protected abstract void ExecuteCommand();
    }
}