using IRaCIS.Core.Domain.Share;
using NPOI.XWPF.UserModel;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xceed.Document.NET;
using Xceed.Words.NET;

namespace IRaCIS.Core.Application.Helper
{
    /// <summary>
    /// 利用DocX 库 处理word国际化模板
    /// </summary>
    public static class WordTempleteHelper
    {
        public static void DocX_GetInternationalTempleteStream(string filePath, Stream memoryStream)
        {

            var isEn_US = CultureInfo.CurrentCulture.Name == StaticData.CultureInfo.en_US;

            using (DocX document = DocX.Load(filePath))
            {
                // 查找书签
                var bookmarkEn_Start = document.Bookmarks.FirstOrDefault(b => b.Name == StaticData.CultureInfo.en_US_bookMark);

                if (bookmarkEn_Start != null)
                {
                    // 获取书签的起始位置
                    //int bookmarkCNStartPos = bookmarkCn_Start.Paragraph.StartIndex;

                    var bookmarkENStartPos = bookmarkEn_Start.Paragraph.StartIndex;

                    // 创建一个要删除段落的列表
                    List<Paragraph> paragraphsToRemove = new List<Paragraph>();

                    foreach (var item in document.Paragraphs)
                    {
                        //中文模板在前，英文在后，英文模板，就删除英文之前的，中文模板就删除英文之后的

                        if (isEn_US ? item.EndIndex < bookmarkENStartPos : item.StartIndex >= bookmarkENStartPos)
                        {
                            paragraphsToRemove.Add(item);
                        }
                    }

                    foreach (var paragraph in paragraphsToRemove)
                    {
                        document.RemoveParagraph(paragraph);
                    }

                }

                // 保存修改
                document.SaveAs(memoryStream);
            }
        }


        public static void Npoi_GetInternationalTempleteStream(string filePath, Stream memoryStream)
        {

            var isEn_US = CultureInfo.CurrentCulture.Name == StaticData.CultureInfo.en_US;

            using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
            {
                XWPFDocument doc = new XWPFDocument(fs);

                // 查找包含指定书签的段落及其索引
                var bookmarkParagraph = doc.Paragraphs
                    .FirstOrDefault(p => p.GetCTP().GetBookmarkStartList().Any(b => b.name == StaticData.CultureInfo.en_US_bookMark));

                if (bookmarkParagraph != null)
                {
                    int bookmarkIndex = doc.Paragraphs.IndexOf(bookmarkParagraph);

                    if (isEn_US)
                    {
                        // 从书签所在段落开始，删除之前的所有段落
                        for (int i = bookmarkIndex - 1; i >= 0; i--)
                        {
                            doc.RemoveBodyElement(i);
                        }
                    }
                    else
                    {
                        // 删除书签之后的所有段落
                        for (int i = doc.Paragraphs.Count - 1; i >= bookmarkIndex; i--)
                        {
                            doc.RemoveBodyElement(i);
                        }
                    }
                }
                doc.Write(memoryStream);
            }
        }

    }
}