package com.wgtgt.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;

public class FileUtils {
	public static void join(String folder){
		try {
			File srcFolder=new File(folder);
			File[]files=srcFolder.listFiles();
			String fileName=getFileName(files);
			OutputStream fos=new FileOutputStream(folder+"/"+fileName);
			for (File file : files) {
				InputStream fis=new FileInputStream(file);
				int len=0;
				byte[]buffer=new byte[1024*8];
				while((len=fis.read(buffer))!=-1){
					fos.write(buffer, 0, len);
				}
				fis.close();
			}
			fos.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	public static String getFileName(File[]files){
		ArrayList<String>list=new ArrayList<String>();
		for (File file : files) {
			list.add(file.getName());
		}
		String[]fileNames=new String[list.size()];
		fileNames=list.toArray(fileNames);
		return join(fileNames);
	}
	public static String join(String[]strs){
		if(strs==null||strs.length==0){
			return "sum";
		}
		StringBuilder start=new StringBuilder();
		StringBuilder end=new StringBuilder();
		String name=null;
		if(strs.length>0){
			name=strs[0];
			char[]chs=name.toCharArray();
	Label1:		for (int i = 0; i < chs.length; i++) {
				for (int j = 0; j < strs.length-1; j++) {
					try {
						if(strs[j].charAt(i)!=strs[j+1].charAt(i)){
							break Label1;
						}
					} catch (StringIndexOutOfBoundsException e) {
						break Label1;
					}
				}
					start.append(chs[i]);
			}
	Label2:		for (int i = 1; i < chs.length; i++) {
				for (int j = 0; j < strs.length-1; j++) {
					try {
						if(strs[j].charAt(strs[j].length()-i)!=strs[j+1].charAt(strs[j+1].length()-i)){
							break Label2;
						}
					} catch (StringIndexOutOfBoundsException e) {
						break Label2;
					}
				}
					end.insert(0,chs[chs.length-i]);
			}
		}
		String mid=name.substring(start.length(),name.length()-end.length());
		try {
			Integer.parseInt(mid);
			String startStr=start.toString();
			String endStr=end.toString();
			if(startStr.endsWith("[")&&endStr.startsWith("]")){
				return startStr.substring(0,startStr.length()-1)+endStr.substring(1);
			}
			if(startStr.endsWith("(")&&endStr.startsWith(")")){
				return startStr.substring(0,startStr.length()-1)+endStr.substring(1);
			}
			if(startStr.endsWith("{")&&endStr.startsWith("}")){
				return startStr.substring(0,startStr.length()-1)+endStr.substring(1);
			}
		} catch (NumberFormatException e) {
			
		}
		String startStr=start.toString();
		if(startStr.endsWith(".")){
			startStr=startStr.substring(0,startStr.length()-1);
		}
		String result=startStr+end.toString();
		return result;
	}
}