// Copyright (C) 2013 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.googlesource.gerrit.plugins.hooks.workflow.action;

import java.io.IOException;
import java.util.Set;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.inject.Inject;
import com.googlesource.gerrit.plugins.hooks.workflow.ActionRequest;
import com.googlesource.gerrit.plugins.hooks.workflow.Property;

/**
 * Dumps the event's properties to the log.
 *
 * This event helps when developing rules as available properties become
 * visible.
 */
public class LogEvent implements Action {
  private static final Logger log = LoggerFactory.getLogger(LogEvent.class);

  private enum Level { ERROR, WARN, INFO, DEBUG };

  public interface Factory {
    LogEvent create();
  }

  @Inject
  public LogEvent() {
  }

  private void logProperty(Level level, Property property) {
    String message = property.toString();
    switch (level) {
      case ERROR:
        log.error(message);
        break;
      case WARN:
        log.warn(message);
        break;
      case INFO:
        log.info(message);
        break;
      case DEBUG:
        log.debug(message);
        break;
      default:
        log.error("Undefined log level.");
    }
  }

  @Override
  public void execute(String issue, ActionRequest actionRequest,
      Set<Property> properties) throws IOException {
    String levelParameter = actionRequest.getParameter(1);
    if (levelParameter != null) {
      levelParameter = levelParameter.toLowerCase();
    }
    Level level = Level.INFO;
    if ("error".equals(levelParameter)) {
      level = Level.ERROR;
    } else if ("warn".equals(levelParameter)) {
      level = Level.WARN;
    } else if ("info".equals(levelParameter)) {
      level = Level.INFO;
    } else if ("debug".equals(levelParameter)) {
      level = Level.DEBUG;
    }

    for (Property property : properties) {
      logProperty(level, property);
    }
  }
}