package cn.edu.nwu.io;

import java.util.*;

public class File extends java.io.File {
    

    File(java.io.File file,String str){
        super(file,str);
    } 
    File(String str1,String str2){
        super(str1,str2);
    } 
    File(String str){
        super(str);
    } 
    File(java.net.URI uri){
        super(uri);
    } 
    public static void deleteDirs(java.io.File dir)throws Exception{
        m_root=dir;
        m_dirs= new ArrayList();
        if(!m_root.isDirectory()){
            throw new Exception("Exception:\""+m_root.toString()+"\" is not a director");
        }
        else{
            for(int i=0;i<m_dirs.size();i++){
                System.out.println(((File)m_dirs.get(i)).toString());
            }
            //delete all director 
            try{
                m_dirs.add(m_root);
                myDelete();
            }
            catch(Exception e){
                e.printStackTrace();
            }   
        }   
    }
    /**
     * 
     * @param dirPath  String a director file path;
     * @throws IOException if dirPath is not a director file path 
     */
    public static void deleteDirs(String dirPath)throws Exception{
        m_root=new java.io.File(dirPath);
        deleteDirs(m_root);
    }
    
    public static void deleteSubDirs(String dirPath)throws Exception{
        m_root=new java.io.File(dirPath);
        deleteSubDirs(m_root);    
    }
    
    
    public static void deleteSubDirs(java.io.File dir)throws Exception{
        m_root=dir;
        m_dirs= new ArrayList();
        //deleteDirs(m_root);
        if(!m_root.isDirectory()){
            throw new Exception("Exception:\""+m_root.toString()+"\" is not a director");
        }
        
        else{
            for(int i=0;i<m_dirs.size();i++){
                System.out.println(((File)m_dirs.get(i)).toString());
            }
            try{
                myDelete();
           }
           catch(Exception e){
                   e.printStackTrace();
           }
           }    
    }
    /*
     *  visit all a director and save them in a list
     */
    private static void visitAll(java.io.File tempRoot){
        //m_dirs.add(tempRoot);
        //System.out.println("函數(shù)開始處："+m_dirs.size());
        
        java.io.File[] dirs=tempRoot.listFiles();
        if(dirs!=null){
        
        List dirsList=Arrays.asList(dirs);
        //while(dirsList!=null){
            if(dirsList==null){
                try{
                    tempRoot.delete();
                }
                catch(Exception e){
                    e.printStackTrace();
                }
            }
            else{
                
                m_dirs.addAll(dirsList);    
                //System.out.println(m_dirs.size());
                /*
                for(int i=0;i<dirs.length;i++){//print dirs
                    System.out.println("NO."+ ++counter+":"+dirs[i].toString());
                }
                */
                //System.out.println(m_dirs.size());
                
                for(int i=0;i<dirsList.size();i++){
                    tempRoot=(java.io.File)dirsList.get(i);
                    visitAll(tempRoot);
                    /*
                    dirs=tempRoot.listFiles();
                    List dirsList= Arrays.asList(dirs);
                    */
                    //System.out.println(tempRoot.toString());
                }   
            }
            //return true;
        //}
        }
    }
    /*
     * do delete
     */
    private static void myDelete()throws Exception{
        //m_dirs.add(m_root);
        visitAll(m_root);
        
        if(m_dirs!=null){
            
            //System.out.println("刪除前:"+m_dirs.size());
            //System.out.println(m_dirs.size());
            for(int i=m_dirs.size()-1;i>=0;i--){
                java.io.File f= (java.io.File)m_dirs.remove(i);
                //File f= (File)m_dirs.get(i);
                //System.out.println(f.toString());
                String fileName=f.toString();
                
                if(!f.delete()){
                    throw new Exception("Exception: delete file "+ fileName+" false!");
                    //System.out.println("刪除文件/文件夾"+fileName+"失敗!");
                }
            }
        }
        else{
            throw new Exception("Exception: read file list of "+m_root.toString()+"false!");
            //System.out.println("ArrayList==null");
        }
    }
    /*
     * root director 
     */
    private static java.io.File m_root;
    
    private static ArrayList m_dirs;
    //private static int counter=0;

    public static void main(String[] args) {//測試類
        
        File file =new File("J:/畢業(yè)設(shè)計/測試類/測試文件");
        try{
            File.deleteDirs("J:/畢業(yè)設(shè)計/測試類/測試文件");
            //File.deleteDirs(file);
            //File.deleteSubDirs("J:/畢業(yè)設(shè)計/測試類/測試文件");
            //File.deleteSubDirs(file);
            //File f=new File("F:/test.txt");
            //f.delete();
        }
        catch(Exception e){
            e.printStackTrace();
        }
        System.out.println("刪除成功~");
    }    
}//:~