package ESU.encoding;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;

//
// 确定一个文件夹子，循环递归便利将里面的 java文件 进行 utf8 保存
// 稍后并到德塔 data swap 工程 
// 作者 罗瑶光

//作者+ 著作权人： 罗瑶光，浏阳，
public class Coding_ESU{
  public static void main(String[] argv) throws IOException, InterruptedException {
    String category= new String("C:/Users/yaogu/Desktop/project/开源门户/HRJ_YLJ_18111");
    String decoding= "GBK";//解码读档
    String encoding= "UTF8";//新文件编码
    String fileTail= ".java";
    String target= "Swapped";
    //String targetType= "addTail";//addTail, deleteTail
    Coding_ESU codingSwap= new Coding_ESU();
    codingSwap.codingSwap(category, decoding, encoding, fileTail, target, "addTail");
    Thread.sleep(1000);
    codingSwap.codingSwap(category, decoding, encoding, fileTail, target, "deleteTail");

  }

  private void codingSwap(String category, String decoding, String encoding
      , String fileTail, String target, String targetType) throws IOException
  , InterruptedException {
    File file= new File(category);
    if(file.isDirectory()) {
      doInnerSwap(file, decoding, encoding, fileTail, target, targetType);
    }
    if(targetType.contains("addTail")) {
      doCodingSwapAddTail(file, decoding, encoding, fileTail, target, targetType);
    }
    if(targetType.contains("deleteTail")) {
      doCodingSwapDeleteTail(file, decoding, decoding, fileTail, target, targetType);
    }
  }

  private void doCodingSwapDeleteTail(File file, String decoding, String encoding
      , String fileTail, String target,
      String targetType) throws IOException, InterruptedException {
    
    String string= file.getAbsolutePath();
    String stringPath= file.getPath();
    if(!string.contains(fileTail)) {
      return;
    }
    if(!string.contains(target)) {
      return;
    }
    //delete original file
    File nameTofile= new File(stringPath.replace(target, ""));
    if(nameTofile.exists()) {
      nameTofile.delete();
      System.out.println("deleted:"+ string);  
    }
    Thread.sleep(2);
    if(!nameTofile.exists()) {
      file.renameTo(nameTofile);
    }
    //delete target file
  }

  private void doCodingSwapAddTail(File file, String decoding, String encoding
      , String fileTail, String target, String targetType) 
          throws IOException, InterruptedException {
    String string= file.getAbsolutePath();
    System.out.println(string);  
    if(!string.contains(fileTail)) {
      return;
    }
    if(string.contains(target)) {
      return;
    }
    //read GBK
    InputStream inputStream= new FileInputStream(file);
    BufferedReader bufferedReader= new BufferedReader(new InputStreamReader
        (inputStream, decoding));  
    //save as UTF8
    OutputStream outputStream= new FileOutputStream(file.getPath()+ target);
    BufferedWriter bufferedWriter= new BufferedWriter(new OutputStreamWriter
        (outputStream, encoding)); 
    String stringLine;
    while((stringLine= bufferedReader.readLine())!= null) {
      bufferedWriter.write(stringLine);
      bufferedWriter.write("\r\n");
      Thread.sleep(1);
    }
    bufferedWriter.close();
    bufferedReader.close();
  }

  private void doInnerSwap(File file, String decoding, String encoding
      , String fileTail, String target, String targetType)
          throws IOException, InterruptedException {
    
    String[] fileStrings= file.list();
    for(String fileString: fileStrings) {
      File fileOfFileString= new File(file.getPath()+ "/"+ fileString);
      if(fileOfFileString.isDirectory()) {
        doInnerSwap(fileOfFileString, decoding, encoding, fileTail
            , target, targetType);
      }
      if(targetType.contains("addTail")) {
        doCodingSwapAddTail(fileOfFileString, decoding, encoding, fileTail
            , target, targetType);
      }
      if(targetType.contains("deleteTail")) {
        doCodingSwapDeleteTail(fileOfFileString, encoding, encoding, fileTail
            , target, targetType);
      }
    }
  }
}
//