using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Autodesk.Revit.DB;
using Autodesk.Revit.DB.Architecture;
using Autodesk.Revit.UI;
using Autodesk.Revit.UI.Selection;
using Sai.RvWrapper.Shared;

namespace SZBIM.StandardTools.ParameterManager
{
    /// <summary>
    ///     项目参数（共享参数）
    /// </summary>
    public class AddProjectParamsHandler : IExternalEventHandler
    {
        private string transName;
        public List<ParamModel> ParameterList { get; set; }
        public List<SharedParamModel> SharedParameters { get; set; }

        public void Execute(UIApplication uiapp)
        {
            Autodesk.Revit.ApplicationServices.Application app = uiapp.Application;
            Document doc = uiapp.ActiveUIDocument.Document;
            StringBuilder sb = new StringBuilder();

            transName = "添加项目参数（共享参数）";
            //IList<Reference> elementReferences = uidoc.Selection.PickObjects(ObjectType.Element,
            //    new TypesSelectionFilter(doc, typeof(FamilyInstance), typeof(HostObject), typeof(Railing)), "请选择需要添加参数的元素");
            //var familyInstancesSelected = from reference in elementReferences
            //                              select doc.GetElement(reference);
            var references = uiapp.ActiveUIDocument.Selection.PickObjects(ObjectType.Element, new TypesSelectionFilter(typeof(FamilyInstance), typeof(HostObject), typeof(Railing)), "请选择需要添加参数的元素，并完成选择").ToList();
            var instancesSelected = references.Select(refer => doc.GetElement(refer));
            var categoryList = instancesSelected.GroupBy(ins => ins.Category.Id.IntegerValue)
                .Select(g => g.FirstOrDefault()?.Category)
                .ToList();
            if (!instancesSelected.Any())
            {
                return;
            }

            SharedParamsUtil util = new SharedParamsUtil();
            var originSharedParametersFile = uiapp.Application.SharedParametersFilename.Clone();
            var tempFile = util.CreateTempSharedParameterFile(app, "TempSharedParameters");
            doc.Invoke(ts =>
            {
                var g = tempFile.Groups.Create("TempGroup");
                var paramDatas = ParameterList.Where(p => p.IsChecked == true);
                foreach (ParamModel paramData in paramDatas)
                {
                    bool isExist = util.IsExistSharedParam(doc, paramData.FullProperty, out Definition def, out ElementBinding binding);
                    //如果共享参数已经绑定了
                    if (isExist)
                    {
                        //将类别附加到当前已经存在的共享参数
                        foreach (Category category in categoryList.Where(category => !binding.Categories.Contains(category)))
                        {
                            binding.Categories.Insert(category);
                            doc.ParameterBindings.ReInsert(def, binding, BuiltInParameterGroup.PG_ADSK_MODEL_PROPERTIES);
                        }
                    }
                    else
                    {
                        if (SharedParameters == null)
                        {
                            CategorySet categories = uiapp.Application.Create.NewCategorySet();
                            foreach (var category in categoryList)
                            {
                                categories.Insert(category);
                            }

                            //实例参数绑定
                            InstanceBinding newInstanceBinding = uiapp.Application.Create.NewInstanceBinding(categories);

                            var options =
                                new ExternalDefinitionCreationOptions(paramData.FullProperty, ParameterType.MultilineText)
                                {
                                    GUID = new Guid(paramData.Guid)
                                };
                            try
                            {
                                var definition = g.Definitions.Create(options);
                                doc.ParameterBindings.Insert(definition, newInstanceBinding,
                                    BuiltInParameterGroup.PG_ADSK_MODEL_PROPERTIES);
                            }
                            finally
                            {
                                uiapp.Application.SharedParametersFilename = originSharedParametersFile.ToString();
                            }
                        }
                        else
                        {
                            foreach (var sharedParameter in SharedParameters)
                            {
                                if (sharedParameter.FullParamName == paramData.FullProperty)
                                {
                                    CategorySet categories = uiapp.Application.Create.NewCategorySet();

                                    foreach (var category in categoryList)
                                    {
                                        categories.Insert(category);
                                    }

                                    InstanceBinding newInstanceBinding =
                                        uiapp.Application.Create.NewInstanceBinding(categories);

                                    var definition = g.Definitions.get_Item(sharedParameter.FullParamName);
                                    if (definition == null)
                                    {
                                        var options =
                                            new ExternalDefinitionCreationOptions(sharedParameter.FullParamName,
                                                ParameterType.MultilineText)
                                            {
                                                GUID = new Guid(sharedParameter.Guid)
                                            };
                                        definition = g.Definitions.Create(options);
                                    }

                                    doc.ParameterBindings.Insert(definition, newInstanceBinding,
                                        BuiltInParameterGroup.PG_ADSK_MODEL_PROPERTIES);
                                    break;
                                }
                            }
                        }
                    }
                }

                uiapp.Application.SharedParametersFilename = originSharedParametersFile.ToString();
            }, transName);
            File.Delete(tempFile.Filename);
            if (string.IsNullOrEmpty(sb.ToString()))
            {
                TaskDialog.Show("提示", "添加完成！");
            }
            else
            {
                TaskDialog.Show("警告", sb.ToString());
            }
        }

        public string GetName()
        {
            return transName;
        }
    }
}