using Autodesk.Revit.DB;

using System;

using System.Linq;

namespace Szmedi.RvKits.Assists
{
    internal static class CADExtensions
    {
        /// <summary>
        /// 获取dwg所在的路径
        /// </summary>
        /// <param name="dwg"></param>
        /// <returns></returns>
        public static string GetDwgPath(this ImportInstance dwg)
        {
            var cadLinkType = dwg.Document.GetElement(dwg.GetTypeId()) as CADLinkType;
            var filePath = cadLinkType?.GetExternalFileReference().GetLinkedFileStatus() == LinkedFileStatus.Loaded
                ? ModelPathUtils.ConvertModelPathToUserVisiblePath(cadLinkType?.GetExternalFileReference().GetAbsolutePath())
                : throw new InvalidOperationException("该dwg不是链接");
            return !File.Exists(filePath) ? throw new InvalidOperationException("链接文件路径不存在") : filePath;
        }
        public static List<KeyValuePair<string, XYZ>> GetTextsByLayer(this ImportInstance dwg, string textLayerName)
        {
            List<KeyValuePair<string, XYZ>> keyValuePairs = [];
            var dwgTransform = dwg!.GetTransform();
            var path = dwg.GetDwgPath();
            using ACadSharp.IO.DwgReader reader = new(path);
            var cadDocument = reader.Read();
            var entities = cadDocument.Entities
                                   .Where(
                                       entity => (entity is ACadSharp.Entities.MText ||
                                               entity is ACadSharp.Entities.TextEntity) &&
                                           entity.Layer.Name == textLayerName)
                                   .ToList();
            foreach (var entity in entities)
            {
                if (entity is ACadSharp.Entities.MText mText)
                {
                    var loc = dwgTransform.OfPoint(new XYZ(mText.InsertPoint.X, mText.InsertPoint.Y, mText.InsertPoint.Z) / 304.8);
                    if (mText.Value.Contains(@"\f") && mText.Value.Contains(@"|b") && mText.Value.Contains(@"i0"))//多行字体编码问题
                    {
                        var str = mText.Value.Split(';').Last().TrimEnd('}');
                        keyValuePairs.Add(new KeyValuePair<string, XYZ>(str, loc));
                    }
                    else
                    {
                        keyValuePairs.Add(new KeyValuePair<string, XYZ>(mText.Value, loc));
                    }
                }
                if (entity is ACadSharp.Entities.TextEntity text)
                {
                    var loc = dwgTransform.OfPoint(new XYZ(text.InsertPoint.X, text.InsertPoint.Y, text.InsertPoint.Z) / 304.8);
                    keyValuePairs.Add(new KeyValuePair<string, XYZ>(text.Value, loc));
                }
            }
            return keyValuePairs;
        }
    }
}