using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using HStation.RevitDev.RevitDataExport.Common;
using HStation.RevitDev.RevitDataExport.Service;
using System;
using System.IO;
using System.Linq;
using System.Windows;

namespace HStation.RevitDev.RevitDataExport.Entity
{
    public class ExternalEvent_CreateInstance : IExternalEventHandler
    {
        public string RfaPath { get; set; } = null;

        private bool m_isFirstTrigger = true;

        private UIApplication m_app = null;

        public void Execute(UIApplication app)
        {
            if (app == null || RfaPath == null || !File.Exists(RfaPath)) { return; }
            m_app = app;
            m_app.Idling += App_Idling;
            UIDocument uiDoc = app.ActiveUIDocument;
            Document doc = uiDoc.Document;
            Family family = null;
            FamilySymbol symbol = null;

            LoadFamilyFile(doc, ref family, ref symbol);
            if (family == null || symbol == null) { return; }

            PlacementFamilyInstance(uiDoc, symbol);
        }

        private void App_Idling(object sender, Autodesk.Revit.UI.Events.IdlingEventArgs e)
        {
            if (m_isFirstTrigger)
            {
                m_isFirstTrigger = false;
            }
            else
            {
                GlobalResource.PlacingType = Model.ModelEnum.RevitType.RFT_Unknown;
                m_app.Idling -= App_Idling;
                m_isFirstTrigger = true;
            }
        }

        private static void PlacementFamilyInstance(UIDocument uiDoc, FamilySymbol symbol)
        {
            if (uiDoc.CanPlaceElementType(symbol))
            {
                try
                {
                    uiDoc.PromptForFamilyInstancePlacement(symbol, new PromptForFamilyInstancePlacementOptions());
                }
                catch (Autodesk.Revit.Exceptions.OperationCanceledException e)
                {
                    return;
                }
            }
            else
            {
                MessageBox.Show("无法放置此类族!");
            }
        }

        private void LoadFamilyFile(Document doc, ref Family family, ref FamilySymbol symbol)
        {
            using (Transaction trans = new Transaction(doc, "创建族实例"))
            {
                trans.Start();
                try
                {
                    if (!doc.LoadFamily(RfaPath, new FamilyLoadOption(), out family))
                    {
                        //说明文档中已经存在, 需要搜索整个文档
                        var elems = SearchService.SearchElements(doc, typeof(Family), Path.GetFileNameWithoutExtension(RfaPath));
                        if (elems != null && elems.Count > 0)
                        {
                            family = elems[0] as Family;
                        }
                    }
                    if (family == null)
                    {
                        trans.Commit();
                        return;
                    }

                    var symbolId = family.GetFamilySymbolIds().FirstOrDefault();
                    symbol = doc.GetElement(symbolId) as FamilySymbol;
                    if (symbol == null)
                    {
                        trans.Commit();
                        return;
                    }
                    symbol.Activate();
                }
                catch (Exception ex)
                {

                }
                trans.Commit();
            }
        }

        public string GetName()
        {
            return "Create Family Instance";
        }
    }

    public class ExternalEvent_CreatePipe : IExternalEventHandler
    {
        UIApplication m_app = null;
        bool m_isFirstTrigger = true;

        public void Execute(UIApplication app)
        {
            m_app = app;
            app.Idling += App_Idling;

            RevitCommandId id = RevitCommandId.LookupPostableCommandId(PostableCommand.Pipe);
            if (m_app.CanPostCommand(id))
            {
                m_app.PostCommand(id);
            }
        }

        private void App_Idling(object sender, Autodesk.Revit.UI.Events.IdlingEventArgs e)
        {
            if (m_isFirstTrigger)
            {
                m_isFirstTrigger = false;
            }
            else
            {
                GlobalResource.PlacingType = Model.ModelEnum.RevitType.RFT_Unknown;
                m_app.Idling -= App_Idling;
                m_isFirstTrigger = true;
            }
        }

        public string GetName()
        {
            return "Create Pipe";
        }
    }
}