using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;

using Autodesk.Revit.ApplicationServices;
using Autodesk.Revit.DB;

namespace Szmedi.Toolkit.RvAssists
{
    public class SharedParameterAssists
    {
        /// <summary>
        /// 添加或附加绑定自定义共享参数
        /// </summary>
        /// <param name="doc"></param>
        /// <param name="paramName"></param>
        /// <param name="categories"></param>
        public static void AddOrAttachSharedParameter(Document doc, string paramName, BuiltInParameterGroup group = BuiltInParameterGroup.PG_ADSK_MODEL_PROPERTIES, ParameterType parameterType = ParameterType.Text, params Category[] categories)
        {
            if (IsExistProjectParam(doc, paramName, out var def, out var binding))
            {
                foreach (var cate in categories)
                {
                    binding.Categories.Insert(cate);
                }
                doc.ParameterBindings.ReInsert(def, binding, group);
            }
            else
            {
                string addInPath = Assembly.GetExecutingAssembly().Location;
                string dirAssembly = Path.GetDirectoryName(addInPath);

                var filePath = Path.Combine(Path.GetTempPath(), $"TempSharedParameters.txt");
                var app = doc.Application;
                var originSharedParametersFile = app.SharedParametersFilename.Clone().ToString();
                DefinitionFile tempFile = SharedParameterAssists.CreateSharedParameterFile(app, filePath);
                var g = tempFile.Groups.Create("TempGroup");
                var categorySet = app.Create.NewCategorySet();
                foreach (Category item in categorySet)
                {
                    categorySet.Insert(item);
                }
                var newInstanceBinding = app.Create.NewInstanceBinding(categorySet);
                ExternalDefinitionCreationOptions options =
      new(paramName, parameterType);
                try
                {
                    var definition = g.Definitions.Create(options);
                    doc.ParameterBindings.Insert(definition, newInstanceBinding, group);
                }
                finally
                {
                    app.SharedParametersFilename = originSharedParametersFile.ToString();
                    //File.Delete(tempFile.Filename);
                }
            }

        }
        /// <summary>
        /// 获取项目参数的参数实体和元素绑定
        /// </summary>
        /// <param name="doc"></param>
        /// <returns></returns>
        public static Dictionary<ParameterElement, ElementBinding> GetParameterElementBindings(Document doc)
        {
            var parameterElements = new FilteredElementCollector(doc).OfClass(typeof(ParameterElement)).Cast<ParameterElement>().ToList();

            Dictionary<ParameterElement, ElementBinding> dict = [];
            var dep = doc.ParameterBindings.ForwardIterator();
            while (dep.MoveNext())
            {
                if (dep.Key is InternalDefinition definition)
                {
                    var binding = dep.Current as ElementBinding;
                    foreach (var param in parameterElements)
                    {
                        var def = param.GetDefinition();

                        if (def.Id == definition.Id)
                        {
                            dict.Add(param, binding);
                        }
                    }
                }
            }
            return dict;
        }
        //private string tempFolder = Path.GetTempPath();
        /// <summary>
        /// 是否存在该项目参数
        /// </summary>
        /// <param name="doc"></param>
        /// <param name="paramName"></param>
        /// <param name="definition"></param>
        /// <param name="binding"></param>
        /// <returns></returns>
        public static bool IsExistProjectParam(Document doc, string paramName, out Definition definition, out ElementBinding binding)
        {
            DefinitionBindingMap map = doc.ParameterBindings;
            var dep = map.ForwardIterator();
            var isExist = false;
            binding = null;
            definition = null;
            while (dep.MoveNext())
            {
                definition = dep.Key;
                var definitionName = definition.Name;
                binding = dep.Current as ElementBinding;

                if (definitionName == paramName)
                {
                    isExist = true;
                    break;
                }
            }

            return isExist;
        }

        /// <summary>
        /// 创建共享参数文件
        /// </summary>
        /// <param name="revitApp"></param>
        /// <param name="shareFile">共享文件路径</param>
        /// <returns></returns>
        public static DefinitionFile CreateSharedParameterFile(Application revitApp, string shareFile)
        {
            System.Text.StringBuilder contents = new();
            contents.AppendLine("# This is a Revit shared parameter file.");
            contents.AppendLine("# Do not edit manually.");
            contents.AppendLine("*META	VERSION	MINVERSION");
            contents.AppendLine("META	2	1");
            contents.AppendLine("*GROUP	ID	NAME");
            contents.AppendLine("*PARAM	GUID	NAME	DATATYPE	DATACATEGORY	GROUP	VISIBLE");
            File.WriteAllText(shareFile, contents.ToString());
            revitApp.SharedParametersFilename = shareFile;
            return revitApp.OpenSharedParameterFile();
        }
        public static DefinitionGroup GetGroup(DefinitionFile myDefinitionFile, string groupName, string log)
        {
            var groups = myDefinitionFile.Groups;
            DefinitionGroup definitionGroup;
            foreach (var definitionGroup2 in groups)
            {
                if (definitionGroup2.Name == groupName)
                {
                    using (StreamWriter streamWriter = new(log, true))
                    {
                        streamWriter.WriteLine($"参数组 {groupName} 已存在");
                    }

                    definitionGroup = definitionGroup2;
                    return definitionGroup;
                }
            }

            using (StreamWriter streamWriter2 = new(log, true))
            {
                streamWriter2.WriteLine($"参数组 {groupName} 未发现");
            }

            definitionGroup = groups.Create(groupName);
            using (StreamWriter streamWriter3 = new(log, true))
            {
                streamWriter3.WriteLine($"参数组 {definitionGroup.Name} 已创建");
            }

            return definitionGroup;
        }

        public static ExternalDefinition GetDefinition(
            DefinitionFile sharedParamFile,
            string definitionName,
            ParameterType paramType,
            DefinitionGroup group
        )
        {
            foreach (var definitionGroup in sharedParamFile.Groups)
            {
                foreach (var definition in definitionGroup.Definitions)
                {
                    var externalDefinition = (ExternalDefinition)definition;
                    if (externalDefinition.Name == definitionName)
                    {
                        return externalDefinition;
                    }
                }
            }

            ExternalDefinitionCreationOptions externalDefinitionCreationOptions = new(definitionName, paramType);
            return group.Definitions.Create(externalDefinitionCreationOptions) as ExternalDefinition;
        }

        private void CreateSharedParam(
            Application app,
            Document doc,
            string sharedParametersFilePath,
            string groupName,
            string definitionName
        )
        {
            var parameterType = ParameterType.Text;
            CategorySet categorySet = new();
            var wallCategory = doc.Settings.Categories.get_Item(BuiltInCategory.OST_Walls);
            categorySet.Insert(wallCategory);
            var instanceParameter = true;
            var parameterGroup = BuiltInParameterGroup.PG_DATA;

            if (!File.Exists(sharedParametersFilePath))
            {
                try
                {
                    var sw = File.CreateText(sharedParametersFilePath);
                    sw.Close();
                }
                catch (Exception)
                {
                    throw new Exception("无法创建共享参数文件: " + sharedParametersFilePath);
                }
            }

            // 设置共享参数文件
            app.SharedParametersFilename = sharedParametersFilePath;

            // 打开共享参数文件
            var definitionFile = app.OpenSharedParameterFile();
            if (definitionFile == null)
            {
                throw new Exception("无法打开共享参数文件");
            }

            // 获取参数组的集合
            var groups = definitionFile.Groups;

            // 获取参数组
            var group = groups.get_Item(groupName);
            if (null == group)
            {
                // 如果参数组不存在，则创建一个
                group = groups.Create(groupName);
            }

            if (null == group)
            {
                throw new Exception("获取参数组失败: " + groupName);
            }

            // 获取参数定义
            var definition = group.Definitions.get_Item(definitionName);
            // 如果参数定义不存在，则创建一个
            definition ??= group.Definitions.Create(new ExternalDefinitionCreationOptions(definitionName, parameterType));

            // 调用不同的函数创建类型参数或者实例参数
            ElementBinding binding = instanceParameter
                ? app.Create.NewInstanceBinding(categorySet)
                : app.Create.NewTypeBinding(categorySet);

            // 把参数定义和类别绑定起来（下面的小节会提到“绑定”），元素的新的参数就创建成功了。
            var insertSuccess = doc.ParameterBindings.Insert(definition, binding, parameterGroup);

            if (!insertSuccess)
            {
                throw new Exception("绑定类别失败");
            }
        }

        private void CreateSharedParam(Application app, Document doc)
        {
            // 获取创建共享参数的txt路径
            var txtFile = app.SharedParametersFilename;

            // 判断 路径是否有效，如果为空，读者可以创建一txt文件

            //将路径赋值给app.SharedParametersFilename

            if (!string.IsNullOrEmpty(txtFile))
            {
                // 判断 路径是否有效，如果为空，读者可以创建一txt文件

                //将路径赋值给app.SharedParametersFilename

                if (File.Exists(txtFile))
                {
                    var dfile = app.OpenSharedParameterFile();

                    // 创建一个共享参数分组
                    var dg = dfile.Groups.Create("MyGroup");

                    // 参数创建的选项，包括参数名字，参数类型，用户是不是可以修改。。
                    ExternalDefinitionCreationOptions edco = new("特别注释", ParameterType.Text);

                    // 创建参数
                    var df = dg.Definitions.Create(edco);
                    // 上面就创建了 一个名为“MyGroup” 的分组，并在这个分组下创建了一个名为“特别注释”的参数

                    // 创建一个Category集合

                    var cateSet = app.Create.NewCategorySet();

                    // 获取墙的category
                    var wallCate = Category.GetCategory(doc, BuiltInCategory.OST_Walls);

                    // 在Category集合中加入 墙的category
                    var flag = cateSet.Insert(wallCate);

                    // 给 这个Category集合中的Category 创建一个实例绑定
                    var wallInsBd = app.Create.NewInstanceBinding(cateSet);

                    // 获取当前Document的BindingMap
                    var bmap = doc.ParameterBindings;

                    //创建共享参数和Category之间的Binding
                    bmap.Insert(df, wallInsBd);
                }
            }
        }

        public void GetSharedPara(Application RevitApp)
        {
            // 打开共享参数文件
            var definitionFile = RevitApp.OpenSharedParameterFile();
            // 获取参数组的集合
            var groups = definitionFile.Groups;

            foreach (var group in groups)
            {
                // 获取参数组内的参数定义
                foreach (var definition in group.Definitions)
                {
                    var name = definition.Name;
                    var type = definition.ParameterType;
                    // 对参数定义的其他操作
                }
            }
        }

        /// <summary>
        ///     获取类别和参数的绑定
        /// </summary>
        /// <param name="doc">激活的文档</param>
        public void ShareParameterBinging(Document doc)
        {
            var map = doc.ParameterBindings;
            var dep = map.ForwardIterator();
            while (dep.MoveNext())
            {
                var definition = dep.Key;
                // 获取参数定义的基本信息
                var definitionName = definition.Name;
                var parameterType = definition.ParameterType;
                // 几乎都可以转型为InstanceBinding，笔者没有碰到过其他情况，如有例外，请联系我们。
                if (dep.Current is InstanceBinding instanceBinding)
                {
                    // 获取绑定的类别列表
                    var categorySet = instanceBinding.Categories;
                }
            }
        }
    }
}