package hw1;

import java.io.*; 
import java.util.*; 
import java.net.*; 
import java.awt.*; 

// Contains code for getting the HTML page, parsing it and getting the 
// stock quote
public class GetQuoteInfo { 
  
  public static float getQuoteFromURL(URLConnection u) throws IOException { 

    String line=""; 
    DataInputStream in = new DataInputStream(u.getInputStream()); 
    
    // Look for "Last Trade"  
    boolean lastTradeFound = false; 
    while (lastTradeFound == false) { 
      line = in.readLine(); 
      if (line.regionMatches(21, "Last Trade", 0, 10) == true)
	lastTradeFound = true; 
    } 
    
    // Look for the first tr
    int numTR = 0; 
    while (numTR < 1) { 
      line = in.readLine(); 
      if (line.startsWith("<tr") == true)
	numTR ++; 
    }
    
    // Look for the third td
    int numTD = 0; 
    while (numTD < 3) { 
      line = in.readLine(); 
      if (line.startsWith("<td") == true) { 
	numTD ++; 
      }
    }
    
    System.out.println(line);
    // Get the stock quote 
    float quote = 0; 
    int num =0, den=0;
    int currIndex=0;
    int lenLine = line.length(); 
    while (currIndex<lenLine&&Character.isDigit(line.charAt(currIndex))== false) 
      currIndex++;
    while (currIndex<lenLine&&Character.isDigit(line.charAt(currIndex))== true) { 
      quote = quote*10 + Character.digit(line.charAt(currIndex), 10); 
      currIndex++;
    }

    while (currIndex<lenLine&&Character.isDigit(line.charAt(currIndex))== false) 
      currIndex++;
    while (currIndex<lenLine&&Character.isDigit(line.charAt(currIndex))== true) { 
      num = num*10 + Character.digit(line.charAt(currIndex), 10); 
      currIndex++;
    }

    while (currIndex<lenLine&&Character.isDigit(line.charAt(currIndex))== false) 
      currIndex++;
    while (currIndex<lenLine&&Character.isDigit(line.charAt(currIndex))== true) { 
      den = den*10 + Character.digit(line.charAt(currIndex), 10); 
      currIndex++;
    }
    if (num != 0)
      quote = quote + (float)num/(float)den;

    return quote;
  }
}