package org.infinispan.test.integration.security.utils;

import java.net.URL;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.SystemUtils;
import org.jboss.as.arquillian.container.ManagementClient;
import org.jboss.as.test.integration.security.common.CoreUtils;
import org.jboss.logging.Logger;

/**
 * Common utilities for JDG security tests.
 *
 * @author Jan Lanik
 * @author Josef Cacek
 * @author Vitalii Chepeliuk
 */
public class Utils extends CoreUtils {

    private static final Logger LOGGER = Logger.getLogger(Utils.class);

    public static final boolean IBM_JDK = StringUtils.startsWith(SystemUtils.JAVA_VENDOR, "IBM");

    public static URL getResource(String name) {
        ClassLoader tccl = Thread.currentThread().getContextClassLoader();
        return tccl.getResource(name);
    }

    private static final long STOP_DELAY_DEFAULT = 0;

    /**
     * stops execution of the program indefinitely useful in testsuite debugging
     */
    public static void stop() {
        stop(STOP_DELAY_DEFAULT);
    }

    /**
     * stop test execution for a given time interval useful for debugging
     *
     * @param delay interval (milliseconds), if delay<=0, interval is considered to be infinite (Long.MAX_VALUE)
     */
    public static void stop(long delay) {
        long currentTime = System.currentTimeMillis();
        long remainingTime = 0 < delay ? currentTime + delay - System.currentTimeMillis() : Long.MAX_VALUE;
        while (remainingTime > 0) {
            try {
                Thread.sleep(remainingTime);
            } catch (InterruptedException ex) {
                remainingTime = currentTime + delay - System.currentTimeMillis();
                continue;
            }
        }
    }

    /**
     * Sets or removes (in case value==null) a system property. It's only a helper method, which avoids
     * {@link NullPointerException} thrown from {@link System#setProperty(String, String)} method, when the value is
     * <code>null</code>.
     *
     * @param key property name
     * @param value property value
     * @return the previous string value of the system property
     */
    public static String setSystemProperty(final String key, final String value) {
        return value == null ? System.clearProperty(key) : System.setProperty(key, value);
    }

    /**
     * Returns canonical hostname retrieved from management address of the givem
     * {@link org.jboss.as.arquillian.container.ManagementClient}.
     *
     * @param managementClient
     * @return
     */
    public static final String getCannonicalHost(final ManagementClient managementClient) {
        return getCannonicalHost(managementClient.getMgmtAddress());
    }
}