// CSE 143, Winter 2011, Marty Stepp
// This program demonstrates input streams by reading from a file and from a URL.
// It also demonstrates the try/catch syntax for handling exceptions.

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

public class ReadFile {
	public static void main(String[] args) {
		// read data from a file
		Scanner console = new Scanner(System.in);
		System.out.print("File name? ");
		String filename = console.nextLine();
		
		try {
			readAll(new FileInputStream(filename));
			System.out.println(countWords(new FileInputStream(filename)));
		} catch (IOException fred) {
			System.out.println("Something went wrong while reading the file: " + fred.getMessage());
		}
		
		// read data from a URL
		try {
			URL u = new URL("http://www.purple.com/");
			InputStream urlInput = u.openStream();
			readAll(urlInput);
			System.out.println(countWords(u.openStream()));
		} catch (IOException ivonna) {
			System.out.println("The URL is bad");
		}
	}
		
	// Reads the entire contents of the given input stream (which could be
	// a file, web site, etc.) and prints them all out to the console.
	// Throws an IOException if anything goes wrong while reading data.
	// Precondition: in != null
	public static void readAll(InputStream in) throws IOException {
		while (true) {
			int b = in.read();
			if (b == -1) {
				break;
			}

			char c = (char) b;
			System.out.print(c);
		}
	}
	
	// Returns a count of the total number of words (delimited by whitespace)
	// found in the given input stream.
	// Precondition: in != null
	public static int countWords(InputStream in) {
		Scanner input = new Scanner(in);
		int count = 0;
		while (input.hasNext()) {
			input.next();
			count++;
		}
		return count;
	}
}