package com.thingworx.sdk.simple;

import java.io.BufferedReader;
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.InputStreamReader;
import java.io.UnsupportedEncodingException;

public class FileCompare {
	public static void main(String[] args) throws IOException {
		FileCompare c = new FileCompare();
		File file1 = new File("I:/opt/thingworx/tw_staging/in/hello-edge.txt"); // the old log on thingworx server; here is a copy locally.
		File file2 = new File("I:/opt/thingworx/tw_staging/out/hello-thingworx.txt");// the new log files
		int lineNumber = c.compareFile(file1, file2);
		System.out.println(lineNumber);
	}


	public int compareFile(File file1, File file2) throws IOException {
		BufferedReader br1 = null;
		InputStream is1 = null;
		BufferedReader br2 = null;
		InputStream is2 = null;
		
		int lineNumber = 1;
		try {
			is1 = new FileInputStream(file1);
			br1 = new BufferedReader(new InputStreamReader(is1, "UTF-8"));
			
			is2 = new FileInputStream(file2);
			br2 = new BufferedReader(new InputStreamReader(is2, "UTF-8"));

			String lineStr1 = null;
			String lineStr2 = null;
			while (((lineStr1 = br1.readLine()) != null) && ((lineStr2 = br2.readLine()) != null)&&(lineStr1.equals(lineStr2))) {
				System.out.println(lineStr1);
					lineNumber ++;
					
			}
			if (br1 != null) {
				br1.close();
			}
			if (is1 != null) {
				is1.close();
			}
			if (br2 != null) {
				br2.close();
			}
			if (is2 != null) {
				is2.close();
			}
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (br1 != null) {
				br1.close();
				if (br2 != null) {
					br2.close();
			}
			if (is1 != null) {
				is1.close();
			}if (is2 != null) {
				is2.close();
			}
		 }
	 }
		return lineNumber;
  }
	
	
	public static int copyFile(String src, String dst) {
	    try {
	      int len = 0;
	      byte[] buf = new byte[1024];
	      FileInputStream fis = new FileInputStream(src);
	      FileOutputStream fos = new FileOutputStream(dst);
	      while ( (len = fis.read(buf)) != -1) {
	        fos.write(buf, 0, len);
	      }
	      fis.close();
	      fos.close();
	    }
	    catch (IOException e) {
	      System.out.println(e);
	      return -1;
	    }
	    return 0;
	  }
	 
}