/*
 * WPAPIView.java
 */
import java.io.*;
import java.net.URL;

public class WPAPISearch 
{        
    public static void main(String [] args) 
    {
      if (args.length < 3)
      {
         System.out.println("Usage: java WPAPISearch Areacode Exchange LineNumber");
         System.out.println("Where Areacode is a 3 digit number");
         System.out.println("Where Exchange is a 3 digit number");
         System.out.println("...and LineNumber is a 4 digit number");
         System.out.println("Enter spaces between Areacode and Exchange and LineNumber");
         System.exit(0);
      }
      byte [] crlf = new byte[]{13,10};
      String testStr = "";
      int AreaCodeInt = Integer.parseInt(args[0]);     
      int ExchangeInt = Integer.parseInt(args[1]);
      int LineInt = Integer.parseInt(args[2]);                     
      InputStream  whiteIn = null;  //input stream from WhitePages API page
      OutputStream whiteOut = null; //output stream to capture returned XML
      String urlStrFront = "http://api.whitepages.com/reverse_phone/1.0/?phone=";
      String urlStrEnd = ";api_key=ANumberYouGetByRegisteringWithTheWhitepages";
      //     http://developer.whitepages.com/
      String phone = null;
      OutputStream People = null;

      try
      {
         People = new FileOutputStream("people.txt"); //store information about people in this file
      }
      catch (IOException e)
      {
         System.out.println("Failed to create People.txt\n");
      }
        
           for (int exNum = ExchangeInt; exNum > 99; exNum--)
           {                        
              for (int lineNum = LineInt; lineNum >= 0; lineNum--)
              {                 
                 String exNumStr;
                 String lineNumStr;
                 if (exNum < 10)
                 {                         
                    exNumStr = "00" + exNum;
                 }
                 else if (exNum < 100)
                 {
                    exNumStr = "0" + exNum;
                 }
                 else
                 {
                    exNumStr = Integer.toString(exNum);
                 }
                 if (lineNum < 10)
                 {
                    lineNumStr = "000" + lineNum;
                 }
                 else if (lineNum < 100)
                 {
                    lineNumStr = "00" + lineNum;
                 }
                 else if (lineNum < 1000)
                 {
                    lineNumStr = "0" + lineNum;
                 }
                 else
                 {
                    lineNumStr = Integer.toString(lineNum);
                 }   
                 String npa = args[0];
                 phone = npa + exNumStr;
                 phone = phone + lineNumStr;  //phone number to check
                 String urlStr = urlStrFront + phone + urlStrEnd;
                 URL url = null;
                 try
                 {
                    url = new URL(urlStr);   //call to WhitePAges API
                 }
                 catch (IOException IOe)
                 {                                            
                    continue;
                 }
                 try
                 {
                    boolean noname = true;   //set to false if we find a name
                    whiteIn = url.openStream();  //create a stream to it
                    whiteOut = new FileOutputStream(phone); //name XML file the same as the phone number being tested
                    byte[] buffer = new byte[4096];  //will hold XML output
                    int bytes_read;
                    while((bytes_read = whiteIn.read(buffer)) != -1)
                    {
                       testStr = new String(buffer);
                       if (testStr.indexOf("name") != -1)
                       {
                          noname = false;
                       }
                       whiteOut.write(buffer,0,bytes_read); //write XML                        
                    }
                    whiteIn.close();
                    whiteOut.close();
                    //if there is no string "name" in this file, delete it                   
                    if (noname)
                    {
                       File f = new File(phone);
                       if (f.exists())
                       {
                          f.delete();
                       }
                    }
                    else
                    {
                       String firstname = "";
                       String middlename = "";
                       String lastname = "";
                       int indexOpen = 0;
                       int indexClose = 0;
                       indexOpen = testStr.indexOf("<wp:firstname>");
                       if (indexOpen != -1)
                       {
                          indexClose = testStr.indexOf("</wp:firstname>");
                          firstname =  testStr.substring(indexOpen + 14, indexClose);
                          System.out.println(firstname);
                       }

                       indexOpen = testStr.indexOf("<wp:middlename>");                       
                       if (indexOpen != -1)
                       {                       
                          indexClose = testStr.indexOf("</wp:middlename>");
                          middlename =  testStr.substring(indexOpen + 15, indexClose);
                       }

                       indexOpen = testStr.indexOf("<wp:lastname>");                       
                       if (indexOpen != -1)
                       {                          
                          indexClose = testStr.indexOf("</wp:lastname>");
                          lastname =  testStr.substring(indexOpen + 13, indexClose);
                       }

                       if ((firstname.length() > 0) && (lastname.length() > 0))
                       {
                          String fullName = firstname + " " + lastname;
                          byte[] nameArray = fullName.getBytes();
                          People.write(nameArray); //write name to people.txt
                          People.write(crlf);
                       }
                    }
                    try
                    {
                       Thread.sleep(1000);
                    }
                    catch (Exception e)
                    {
                       System.out.println("Failed to sleep for 1 second\n");
                    }
                 }
                 catch (IOException IOe)
                 {
                    continue;   //skip to next phone number
                 }
              }
              try
              {
                 People.close();
              }
              catch (IOException e)
              {
                 System.out.println("People.txt is still in use at the end of the program\n");
              }
           }

        }
      }