/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2011, 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 java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.slf4j.Marker;

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.classic.spi.IThrowableProxy;
import ch.qos.logback.classic.spi.LoggerContextVO;
import ch.qos.logback.classic.spi.ThrowableProxy;
import ch.qos.logback.core.CoreConstants;
import ch.qos.logback.core.boolex.JaninoEventEvaluatorBase;
import ch.qos.logback.core.boolex.Matcher;

public class JaninoEventEvaluator extends
    JaninoEventEvaluatorBase<ILoggingEvent> {

  public final static String IMPORT_LEVEL = "import ch.qos.logback.classic.Level;\r\n";

  public final static List<String> DEFAULT_PARAM_NAME_LIST = new ArrayList<String>();
  public final static List<Class> DEFAULT_PARAM_TYPE_LIST = new ArrayList<Class>();

  static {
    DEFAULT_PARAM_NAME_LIST.add("DEBUG");
    DEFAULT_PARAM_NAME_LIST.add("INFO");
    DEFAULT_PARAM_NAME_LIST.add("WARN");
    DEFAULT_PARAM_NAME_LIST.add("ERROR");

    DEFAULT_PARAM_NAME_LIST.add("event");
    DEFAULT_PARAM_NAME_LIST.add("message");

    DEFAULT_PARAM_NAME_LIST.add("formattedMessage");
    DEFAULT_PARAM_NAME_LIST.add("logger");
    DEFAULT_PARAM_NAME_LIST.add("loggerContext");
    DEFAULT_PARAM_NAME_LIST.add("level");
    DEFAULT_PARAM_NAME_LIST.add("timeStamp");
    DEFAULT_PARAM_NAME_LIST.add("marker");
    DEFAULT_PARAM_NAME_LIST.add("mdc");
    DEFAULT_PARAM_NAME_LIST.add("throwableProxy");
    DEFAULT_PARAM_NAME_LIST.add("throwable");

    DEFAULT_PARAM_TYPE_LIST.add(int.class);
    DEFAULT_PARAM_TYPE_LIST.add(int.class);
    DEFAULT_PARAM_TYPE_LIST.add(int.class);
    DEFAULT_PARAM_TYPE_LIST.add(int.class);

    DEFAULT_PARAM_TYPE_LIST.add(ILoggingEvent.class);
    DEFAULT_PARAM_TYPE_LIST.add(String.class);
    DEFAULT_PARAM_TYPE_LIST.add(String.class);
    DEFAULT_PARAM_TYPE_LIST.add(String.class);
    DEFAULT_PARAM_TYPE_LIST.add(LoggerContextVO.class);
    DEFAULT_PARAM_TYPE_LIST.add(int.class);
    DEFAULT_PARAM_TYPE_LIST.add(long.class);
    DEFAULT_PARAM_TYPE_LIST.add(Marker.class);
    DEFAULT_PARAM_TYPE_LIST.add(Map.class);
    DEFAULT_PARAM_TYPE_LIST.add(IThrowableProxy.class);
    DEFAULT_PARAM_TYPE_LIST.add(Throwable.class);
  }

  protected String getDecoratedExpression() {
    String expression = getExpression();
    if(!expression.contains("return")) {
      expression = "return "+expression +";";
      addInfo("Adding [return] prefix and a semicolon suffix. Expression becomes ["+expression+"]");
      addInfo("See also "+CoreConstants.CODES_URL+"#block");

    }
    return IMPORT_LEVEL + expression;
  }

  protected String[] getParameterNames() {
    List<String> fullNameList = new ArrayList<String>();
    fullNameList.addAll(DEFAULT_PARAM_NAME_LIST);

    for (int i = 0; i < matcherList.size(); i++) {
      Matcher m = (Matcher) matcherList.get(i);
      fullNameList.add(m.getName());
    }

    return (String[]) fullNameList.toArray(CoreConstants.EMPTY_STRING_ARRAY);
  }

  protected Class[] getParameterTypes() {
    List<Class> fullTypeList = new ArrayList<Class>();
    fullTypeList.addAll(DEFAULT_PARAM_TYPE_LIST);
    for (int i = 0; i < matcherList.size(); i++) {
      fullTypeList.add(Matcher.class);
    }
    return (Class[]) fullTypeList.toArray(CoreConstants.EMPTY_CLASS_ARRAY);
  }

  protected Object[] getParameterValues(ILoggingEvent loggingEvent) {
    final int matcherListSize = matcherList.size();

    int i = 0;
    Object[] values = new Object[DEFAULT_PARAM_NAME_LIST.size()
        + matcherListSize];

    values[i++] = Level.DEBUG_INTEGER;
    values[i++] = Level.INFO_INTEGER;
    values[i++] = Level.WARN_INTEGER;
    values[i++] = Level.ERROR_INTEGER;

    values[i++] = loggingEvent;
    values[i++] = loggingEvent.getMessage();
    values[i++] = loggingEvent.getFormattedMessage();
    values[i++] = loggingEvent.getLoggerName();
    values[i++] = loggingEvent.getLoggerContextVO();
    values[i++] = loggingEvent.getLevel().toInteger();
    values[i++] = loggingEvent.getTimeStamp();
    // In order to avoid NullPointerException, we could push a dummy marker if
    // the event's marker is null. However, this would surprise user who
    // expect to see a null marker instead of a dummy one.
    values[i++] = loggingEvent.getMarker();
    values[i++] = loggingEvent.getMDCPropertyMap();

    IThrowableProxy iThrowableProxy = loggingEvent.getThrowableProxy();

    if (iThrowableProxy != null) {
      values[i++] = iThrowableProxy;
      if (iThrowableProxy instanceof ThrowableProxy) {
        values[i++] = ((ThrowableProxy) iThrowableProxy).getThrowable();
      } else {
        values[i++] = null;
      }
    } else {
      values[i++] = null;
      values[i++] = null;
    }

    for (int j = 0; j < matcherListSize; j++) {
      values[i++] = (Matcher) matcherList.get(j);
    }

    return values;
  }

}
