using Word = Microsoft.Office.Interop.Word;
using System.Diagnostics;
using Logger = Log.Log;

namespace WordAnalyze
{
    public class Analyze
    {
        public Analyze()
        {

        }

        public static string splitChar = "---";
        public string path = "";

        public void SetPath(string path)
        {
            this.path = path;
        }

        public string AnalyzeFile(string fileName)
        {
            if (!ValidFileName(fileName))
            {
                Logger.D("AnalyzeFile with invalid file name {0}", fileName);
                return "无效的文件名";       
            }

            object fn = fileName;

            Word.ApplicationClass app = new Word.ApplicationClass(); // 打开word应用，只会打开一个，即单例模式
            Word.Document doc = null; // 源word文件对象
            try
            {
                doc = app.Documents.Open(ref fn);

                doc.Paragraphs.Add();

                Word.Paragraphs garapraph = doc.Paragraphs; // 源文件的内容
                bool insert = false; //判断是否有插入数据到新文档中，如果有则保存新word，否则直接关掉新word
                int fileIndex = 1; // 切割后word的文件序号，例子: test1.doc, test2.doc

                Word.Document newDoc = null;
                newDoc = app.Documents.Add();
                // 遍历word，通过 --- 三个横线分割
                for (int index = 1; index < garapraph.Count; index ++)
                {
                    string text = garapraph[index].Range.Text.ToString();
                    // Logger.D("document parapraph with index({0}) get message ({1})", index, garapraph[index].Range.Text.ToString());
                    text = text.Trim();
                    if (splitChar == text)
                    {
                        if (insert)
                        {
                            object file = Rename(fileName, fileIndex++);
                            newDoc.SaveAs2(file);
                        }
                        newDoc.Close();
                        newDoc = app.Documents.Add();
                        insert = false;
                        continue;
                    }

                    garapraph[index].Range.Select();
                    app.Selection.Copy();
                    app.Documents[1].Activate();
                    app.Selection.Paste();
                    insert = true;
                }

                if (insert)
                {
                    object file = Rename(fileName, fileIndex++);
                    newDoc.SaveAs2(file);
                }
                newDoc.Close();
                insert = false;
                
            }
            catch (System.Exception e)
            {
                Logger.E("analyze with file name({0}) error ->({1})", fileName, e.Message.ToString());
                return e.Message.ToString();
            }
            finally
            {
                if (doc != null) {
                    doc.Undo();
                    doc.Close();
                }
                if (app != null)
                {
                    app.Quit();
                }
            }

            return "";
        }


        // 判断文件后缀名是否是.doc 或者.docx
        public bool ValidFileName(string fileName)
        {
            if (fileName == null || fileName.Length < 1)
            {
                return false;
            }
            if (!fileName.EndsWith(".doc") && !fileName.EndsWith(".docx"))
            {
                return false;
            }
            return true;
        }

        // 用设定的目录当做子word的目录，默认为选择文件的目录
        public string Rename(string filename, int index)
        {
            var filePathIndex = filename.LastIndexOf('\\');
            string name = "";
            string tempPath = "";
            if (-1 != filePathIndex)
            {
                name = filename.Substring(filePathIndex);
                if (name.Length > 0)
                {
                    name = name.Substring(1);
                }
                tempPath = filename.Substring(0, filePathIndex);
            }

            if ("" == path)
            {
                path = tempPath;
            }

            string newFilename = name;
            newFilename = path + "\\" + name;
            int lastIndex = newFilename.LastIndexOf('.');
            string newName = "";
            if (-1 != lastIndex)
            {
                newName = string.Format("{0}{1}{2}", newFilename.Substring(0, lastIndex), index, newFilename.Substring(lastIndex));
            }
            else
            {
                newName = string.Format("{0}{1}", newFilename, index);
            }
            return newName;
        }
    }
}