package riddle;

import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.util.Random;
import java.util.logging.Logger;
import javax.annotation.PostConstruct;
import javax.ejb.Stateless;

@Stateless
public class RiddleBean {

    private static final Logger logger = Logger.getLogger(RiddleBean.class.getName());

    //copied from /usr/share/games/fortunes/riddles
    private static final String RESOURCE_FILE = "/riddles.txt";

    private static final String DELIM = "%";

    private final Random rand = new Random();

    private String[] riddleData;

    public Riddle getRiddle() {
	String data = riddleData[rand.nextInt(riddleData.length)];
	return new Riddle(data);
    }

    @PostConstruct
    private void postConstruct() {
	InputStreamReader ir = null;
	try {
	    ir = new InputStreamReader(
		getClass().getResourceAsStream(RESOURCE_FILE));
	    char[] buffer = new char[1024];
	    StringWriter sw = new StringWriter();
	    int count = -1;
	    while (ir.read(buffer) != -1) {
		sw.write(buffer);
	    }
	    riddleData = sw.toString().split(DELIM);
	} catch (IOException e) {
	    throw new IllegalStateException("Failed to retrieve riddle data.", e);
	}
	logger.info("Retrieved riddles from " + RESOURCE_FILE);
    }
}