using System.Collections.Generic;

using Bentley.DgnPlatformNET;
using Bentley.DgnPlatformNET.DgnEC;
using Bentley.DgnPlatformNET.Elements;
using Bentley.ECObjects.Instance;
using Bentley.MstnPlatformNET;

namespace Mstn.Toolkit.Helpers
{
    public class ItemTypesHelper
    {
        /// <summary>
        /// ItemTypeLibrary的获取或创建，表现为一个分组的集合
        /// </summary>
        /// <param name="libName"></param>
        /// <returns></returns>
        public static ItemTypeLibrary GetOrCreateItemTypeLibrary(string libName)
        {
            var dgnFile = Session.Instance.GetActiveDgnFile();
            ItemTypeLibrary itemTypeLibrary = ItemTypeLibrary.FindByName(libName, dgnFile);
            if (itemTypeLibrary != null)
            {
                return itemTypeLibrary;
            }
            return ItemTypeLibrary.Create(libName, dgnFile);
        }
        /// <summary>
        /// 通过名称获取ItemTypes
        /// </summary>
        /// <param name="libName"></param>
        /// <returns></returns>
        public static IEnumerable<ItemType> GetItemTypes(string libName)
        {
            ItemTypeLibrary itemTypeLibrary = GetOrCreateItemTypeLibrary(libName);
            return itemTypeLibrary.ItemTypes;
        }
        /// <summary>
        /// 获取当前DGN文件中的所有ItemTypeLibrary
        /// </summary>
        /// <returns></returns>
        public static IList<ItemTypeLibrary> GetItemTypeLibraries()
        {
            DgnFile dgnFile = Session.Instance.GetActiveDgnFile();
            if (dgnFile != null)
            {
                return ItemTypeLibrary.PopulateListFromFile(dgnFile);
            }
            return null;
        }
        /// <summary>
        /// 获取ItemType，包含多个CustomProperty，表现为属性分组
        /// </summary>
        /// <param name="itemLibName"></param>
        /// <param name="itemTypeName"></param>
        /// <returns></returns>
        public static ItemType GetOrCreateItemType(string itemLibName, string itemTypeName)
        {
            ItemTypeLibrary itemTypeLibrary = GetOrCreateItemTypeLibrary(itemLibName);
            ItemType itemType = itemTypeLibrary.GetItemTypeByName(itemTypeName);
            if (itemType != null)
            {
                return itemType;
            }
            return itemTypeLibrary.AddItemType(itemTypeName);
        }

        public static bool AddPropertyToItemType(ItemType itemType, string propertyName, CustomProperty.TypeKind kind, WorkingUnit unit, object defaultValue)
        {
            CustomProperty property = itemType.AddProperty(propertyName);
            property.Type = kind;
            property.DefaultValue = defaultValue;
            if (property.SupportsUnits)
            {
                property.Units = new DgnECUnit(unit); // 可以根据需要设置单位
            }
            return itemType.Library.Write(); // 确保更改被写入到库中
        }
        /// <summary>
        /// 获取ItemType的所有CustomProperty
        /// </summary>
        /// <param name="itemType"></param>
        /// <returns></returns>
        public static List<CustomProperty> GetProperties(ItemType itemType)
        {
            List<CustomProperty> properties = new List<CustomProperty>();
            var props = itemType.GetEnumerator();
            while (props.MoveNext())
            {
                CustomProperty prop = props.Current;
                if (prop != null)
                {
                    properties.Add(prop);
                }
            }
            return properties;
        }
        /// <summary>
        /// 添加ItemType到Model
        /// </summary>
        /// <param name="itemLibName"></param>
        /// <param name="itemTypeName"></param>
        public static void AttachItemTypeToModel(string itemLibName, string itemTypeName)
        {
            DgnModel dgnModel = Session.Instance.GetActiveDgnModel();//获取当前活动的模型
            CustomItemHost host = new CustomItemHost(dgnModel);//声明元素的CustomItemHost
            DgnFile dgnFile = Session.Instance.GetActiveDgnFile();
            ItemTypeLibrary ITL = ItemTypeLibrary.FindByName(itemLibName, dgnFile);
            ItemType itemtype = ITL.GetItemTypeByName(itemTypeName);
            IDgnECInstance ecIns = host.GetCustomItem(itemLibName, itemTypeName);
            if (null == ecIns)
                ecIns = host.ApplyCustomItem(itemtype, true); //对CustomItemHost应用ItemType得到EC实例
            CustomProperty myProp = itemtype.GetPropertyByName("项目名称");

            ecIns.SetString(myProp.InternalName, "属性值");
            var s = ecIns.WriteChanges();
        }
        /// <summary>
        /// 挂接ItemType到元素
        /// </summary>
        /// <param name="elem"></param>
        /// <param name="itemLibName"></param>
        /// <param name="itemTypeName"></param>
        public static void AttachItemTypeToElement(Element elem, string itemLibName, string itemTypeName)
        {
            DgnFile dgnFile = Session.Instance.GetActiveDgnFile();//获得当前激活的文件
            DgnModel dgnModel = Session.Instance.GetActiveDgnModel();
            //根据声明名称获取对应的ItemType
            ItemType itemType = GetOrCreateItemType(itemLibName, itemTypeName);

            CustomItemHost host = new CustomItemHost(elem, true);//声明元素的CustomItemHost
            //实例化
            IDgnECInstance item = host.ApplyCustomItem(itemType, true);//对CustomItemHost添加ItemType得到EC实例

            //EditParameterDefinitions defs = EditParameterDefinitions.GetForModel(dgnModel);//获得模型中的参数定义
            //DgnECInstanceEnabler enabler = DgnECManager.Manager.ObtainInstanceEnabler(dgnFile, itemType.ECClass);//获得文件中使用指定EC类的EC实例
            //if (null != enabler && enabler.SupportsCreateInstanceOnElement)//判断是否是否支持对元素挂接EC实例
            //    defs.SetDomainParameters(enabler.SharedWipInstance);//对参数定义设置域参数

            item.ScheduleChanges(elem);//对元素更新ItemType信息
            elem.ReplaceInModel(elem);
        }
    }
}