//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;

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.its.ItsFacade;
import com.googlesource.gerrit.plugins.hooks.workflow.action.Action;
import com.googlesource.gerrit.plugins.hooks.workflow.action.AddComment;
import com.googlesource.gerrit.plugins.hooks.workflow.action.AddStandardComment;
import com.googlesource.gerrit.plugins.hooks.workflow.action.AddVelocityComment;
import com.googlesource.gerrit.plugins.hooks.workflow.action.LogEvent;

/**
 * Executes an {@link ActionRequest}
 */
public class ActionExecutor {
  private static final Logger log = LoggerFactory.getLogger(
      ActionExecutor.class);

  private final ItsFacade its;
  private final AddComment.Factory addCommentFactory;
  private final AddStandardComment.Factory addStandardCommentFactory;
  private final AddVelocityComment.Factory addVelocityCommentFactory;
  private final LogEvent.Factory logEventFactory;

  @Inject
  public ActionExecutor(ItsFacade its, AddComment.Factory addCommentFactory,
      AddStandardComment.Factory addStandardCommentFactory,
      AddVelocityComment.Factory addVelocityCommentFactory,
      LogEvent.Factory logEventFactory) {
    this.its = its;
    this.addCommentFactory = addCommentFactory;
    this.addStandardCommentFactory = addStandardCommentFactory;
    this.addVelocityCommentFactory = addVelocityCommentFactory;
    this.logEventFactory = logEventFactory;
  }

  public void execute(String issue, ActionRequest actionRequest,
      Set<Property> properties) {
    try {
      String name = actionRequest.getName();
      Action action = null;
      if ("add-comment".equals(name)) {
        action = addCommentFactory.create();
      } else if ("add-standard-comment".equals(name)) {
          action = addStandardCommentFactory.create();
      } else if ("add-velocity-comment".equals(name)) {
        action = addVelocityCommentFactory.create();
      } else if ("log-event".equals(name)) {
        action = logEventFactory.create();
      }

      if (action == null) {
        its.performAction(issue, actionRequest.getUnparsed());
      } else {
        action.execute(issue, actionRequest, properties);
      }
    } catch (IOException e) {
      log.error("Error while executing action " + actionRequest, e);
    }
  }

  public void execute(String issue, Iterable<ActionRequest> actions,
      Set<Property> properties) {
    for (ActionRequest actionRequest : actions) {
        execute(issue, actionRequest, properties);
    }
  }
}