using System.Collections.Generic;
using System.Text;
using System.Linq;

namespace SlideCombine
{
    public class ContentFormatter
    {
        public static string FormatBookmarks(List<BookmarkItem> bookmarks)
        {
            if (bookmarks == null || bookmarks.Count == 0)
                return string.Empty;

            var sb = new StringBuilder();

            // 添加tableOfContents标记
            sb.AppendLine("tableOfContents:");

            foreach (var bookmark in bookmarks)
            {
                if (!string.IsNullOrEmpty(bookmark.Title))
                {
                    // 每行内容顶格
                    sb.Append(bookmark.Title.Trim());

                    // 单词和页码之间加"----------"
                    if (!string.IsNullOrEmpty(bookmark.Page))
                    {
                        sb.Append("----------");
                        sb.Append(bookmark.Page);
                    }

                    // 页码后加"<br/>"
                    sb.Append("<br/>");
                }
            }

            // 添加subject标记
            sb.AppendLine();
            sb.Append("subject:");

            return sb.ToString();
        }

        public static string FormatMetadataDocument(DocumentMetadata metadata)
        {
            if (metadata == null)
                return string.Empty;

            return metadata.ToFormattedString();
        }

        public static string CombineFormattedMetadataDocuments(List<DocumentMetadata> documents)
        {
            if (documents == null || documents.Count == 0)
                return string.Empty;

            var combined = new StringBuilder();

            for (int i = 0; i < documents.Count; i++)
            {
                var doc = documents[i];

                if (i > 0)
                {
                    // 在不同文档内容之间用"<>"分隔
                    combined.AppendLine();
                    combined.AppendLine("<>");
                    combined.AppendLine();
                }

                combined.Append(doc.ToFormattedString());
            }

            return combined.ToString();
        }

        public static string CombineFormattedContents(List<string> formattedContents)
        {
            if (formattedContents == null || formattedContents.Count == 0)
                return string.Empty;

            var combined = new StringBuilder();

            for (int i = 0; i < formattedContents.Count; i++)
            {
                if (i > 0)
                {
                    // 在不同文件内容之间用"<>"分隔
                    combined.AppendLine();
                    combined.AppendLine("<>");
                    combined.AppendLine();
                }

                combined.Append(formattedContents[i]);
            }

            return combined.ToString();
        }
    }
}