/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.classic.boolex;

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.classic.spi.LoggingEvent;
import ch.qos.logback.core.CoreConstants;
import ch.qos.logback.core.boolex.EvaluationException;
import ch.qos.logback.core.status.StatusChecker;
import ch.qos.logback.core.util.ContextUtil;
import ch.qos.logback.core.util.StatusPrinter;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.slf4j.MDC;
import org.slf4j.Marker;
import org.slf4j.MarkerFactory;
import org.slf4j.helpers.BogoPerf;

import static junit.framework.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

/**
 * @author Ceki G&uuml;lc&uuml;
 */

public class GEventEvaluatorTest {

    LoggerContext context = new LoggerContext();
    StatusChecker statusChecker = new StatusChecker(context);
    int LEN = 100 * 1000;

    Logger logger = context.getLogger(this.getClass());
    Marker markerA = MarkerFactory.getMarker("A");

    GEventEvaluator gee = new GEventEvaluator();

    @Before
    public void setUp() {
        gee.setContext(context);
    }

    LoggingEvent makeEvent(String msg) {
        return makeEvent(Level.DEBUG, msg, null, null);
    }

    LoggingEvent makeEvent(Level level, String msg, Throwable t, Object[] argArray) {
        return new LoggingEvent(this.getClass().getName(), logger, level, msg, t, argArray);
    }

    void doEvaluateAndCheck(String expression, ILoggingEvent event, boolean expected) throws EvaluationException {
        gee.setExpression(expression);
        gee.start();

        StatusPrinter.printInCaseOfErrorsOrWarnings(context);
        assertTrue(statusChecker.isErrorFree(0));

        ContextUtil contextUtil = new ContextUtil(context);
        contextUtil.addGroovyPackages(context.getFrameworkPackages());
        contextUtil.addFrameworkPackage(context.getFrameworkPackages(), "ch.qos.logback.classic.boolex");

        boolean result = gee.evaluate(event);
        assertEquals(expected, result);
    }

    @Test
    public void smoke() throws EvaluationException {
        doEvaluateAndCheck("1==1", null, true);
    }

    @Test
    public void event() throws EvaluationException {
        ILoggingEvent event = makeEvent("x");
        event.getLoggerContextVO();
        doEvaluateAndCheck("e.message == 'x'", event, true);
    }

    @Test
    public void msgRegex() throws EvaluationException {
        LoggingEvent event = makeEvent("Hello world");
        // partial match
        doEvaluateAndCheck("e.message =~ /xyz|wor/", event, true);
        // full match
        doEvaluateAndCheck("e.message ==~ /xyz|wor/", event, false);
    }

    @Test
    public void level() throws EvaluationException {
        LoggingEvent event = makeEvent("x");
        doEvaluateAndCheck("e.level == DEBUG", event, true);
    }

    @Test
    public void nullMarker() throws EvaluationException {
        LoggingEvent event = makeEvent("x");
        doEvaluateAndCheck("e.marker?.name == 'YELLOW'", event, false);
    }

    @Test
    public void marker() throws EvaluationException {
        LoggingEvent event = makeEvent("x");
        event.setMarker(markerA);
        doEvaluateAndCheck("e.marker?.name == 'A'", event, true);
    }

    @Test
    public void nullMDC() throws EvaluationException {
        LoggingEvent event = makeEvent("x");
        doEvaluateAndCheck("e.mdc?.get('key') == 'val'", event, false);
    }

    @Test
    public void mdc() throws EvaluationException {
        MDC.put("key", "val");
        LoggingEvent event = makeEvent("x");
        doEvaluateAndCheck("e.mdc['key'] == 'val'", event, true);
        MDC.clear();
    }

    @Test
    public void callerData() throws EvaluationException {
        LoggingEvent event = makeEvent("x");
        doEvaluateAndCheck("e.callerData.find{ it.className =~ /junit/ }", event, true);
    }

    double loop(GEventEvaluator gee) throws EvaluationException {
        long start = System.nanoTime();
        ILoggingEvent event = makeEvent("x");
        for (int i = 0; i < LEN; i++) {
            gee.evaluate(event);
        }
        long end = System.nanoTime();
        return (end - start) / LEN;
    }

    @Test
    public void startMakesIsStartedReturnTrue() {
        gee.setExpression("return true");
        gee.start();
        assertTrue(gee.isStarted());
    }

    @Test
    @Ignore
    public void MANUAL_perfTest() throws EvaluationException {
        gee.setExpression("event.timeStamp < 100 && event.message != 'xx' ");
        gee.start();

        loop(gee);
        loop(gee);
        double avgDuration = loop(gee);

        long referencePerf = 500;
        BogoPerf.assertDuration(avgDuration, referencePerf, CoreConstants.REFERENCE_BIPS);
        System.out.println("Average duration " + avgDuration);
    }

}