/*
 * Copyright 2009 Google Inc.
 * 
 * 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.google.jstestdriver;

import com.google.common.base.Function;
import com.google.common.collect.Lists;
import com.google.inject.Inject;
import com.google.jstestdriver.model.JstdTestCase;
import com.google.jstestdriver.model.RunData;
import com.google.jstestdriver.model.RunDataFactory;
import com.google.jstestdriver.util.StopWatch;

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

import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.util.Iterator;
import java.util.List;

/**
 * @author jeremiele@google.com (Jeremie Lenfant-Engelmann)
 */
public class ActionRunner {
  private static final Logger stopWatchLogger =
      LoggerFactory.getLogger(StopWatch.class);
  private static final Logger logger =
    LoggerFactory.getLogger(ActionRunner.class);

  private final List<Action> actions;

  private final StopWatch stopWatch;
  private final RunDataFactory factory;

  @Inject
  public ActionRunner(List<Action> actions, StopWatch stopWatch, RunDataFactory factory) {
    this.actions = actions;
    this.stopWatch = stopWatch;
    this.factory = factory;
  }

  public void runActions() {
    RunData runData = factory.get();
    logger.info("TestCases {}", runData.getTestCases().size());
    if (logger.isDebugEnabled()) {
      for (JstdTestCase testCase : runData.getTestCases()) {
        if (testCase.getTests().size() == 1) {
          logger.debug("{}:\n{}", testCase.getTests().get(0).getDisplayPath(),
              Lists.transform(testCase.getDependencies(), new Function<FileInfo, String>() {
                @Override
                public String apply(FileInfo f) {
                  return f.getDisplayPath() + "\n";
                }
              }));
        }
      }
    }
    Iterator<Action> iterator = actions.iterator();

    stopWatch.start("runActions");
    try {
      while (iterator.hasNext()) {
        Action action = iterator.next();
        stopWatch.start(action.toString());
        logger.info("Running {}", action);
        try {
          runData = action.run(runData);
        } finally {
          logger.info("Finished {}", action);
          stopWatch.stop(action.toString());
        }
      }
    } finally {
      try {
        stopWatch.stop("runActions");
        Writer writer = new StringWriter();
        stopWatch.print(writer);
        writer.flush();
        stopWatchLogger.info(writer.toString());
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    }
  }
}