/**
    * Copyright 2010-2013 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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 org.kuali.common.util.execute;
  
  import org.kuali.common.util.Assert;
  import org.kuali.common.util.CollectionUtils;
  import org.kuali.common.util.FormatUtils;
  import org.kuali.common.util.ScmUtils;
  import org.kuali.common.util.scm.ScmRequest;
  import org.kuali.common.util.service.ScmService;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class ScmExecutable implements Executable {
  
  	private static final Logger logger = LoggerFactory.getLogger(ScmExecutable.class);
  
  	boolean skip;
  	boolean logConfiguration;
  	ScmService service;
  	ScmRequest request;
  
  	@Override
  	public void execute() {
  
  		// Show our current configuration
  		if (logConfiguration) {
  			log(this);
  		}
  
  		// They have explicitly asked that execution be skipped
  		if (skip) {
  			logger.info("Skipping execution");
  			return;
  		}
  
  		// The SCM request is not allowed to be null here
  		Assert.notNull(request);
  
  		// There are no files to add/delete/commit, no point in going further.
  		if (isEmpty(request)) {
  			logger.info("Skipping execution.  Nothing to do!");
  			return;
  		}
  
  		// Make sure we are configured correctly
  		validateConfiguration(service, request);
  
  		// Add files as needed
  		if (!CollectionUtils.isEmpty(request.getAdds())) {
  			service.add(request.getAdds());
  		}
  
  		// Delete files as needed
  		if (!CollectionUtils.isEmpty(request.getDeletes())) {
  			service.delete(request.getDeletes());
  		}
  
  		// Commit files as needed
  		if (!CollectionUtils.isEmpty(request.getCommits())) {
  			service.commit(request.getCommits(), request.getCommitMessage());
  		}
  	}
  
  	protected void validateConfiguration(ScmService service, ScmRequest request) {
  		// Make sure we are configured correctly
  		Assert.notNull(service, "service is null");
  		if (!CollectionUtils.isEmpty(request.getCommits())) {
  			Assert.hasText(request.getCommitMessage(), "commitMessage has no text");
  		}
  	}
  
  	protected void log(ScmExecutable exec) {
  		ScmRequest request = ScmUtils.cloneOrNew(exec.getRequest());
  		String adds = FormatUtils.getCount(CollectionUtils.toEmptyList(request.getAdds()).size());
  		String deletes = FormatUtils.getCount(CollectionUtils.toEmptyList(request.getDeletes()).size());
  		String commits = FormatUtils.getCount(CollectionUtils.toEmptyList(request.getCommits()).size());
  
  		logger.info(" -- SCM --");
  		logger.info("Adds: {}", adds);
  		logger.info("Deletes: {}", deletes);
  		logger.info("Commits: {}", commits);
  		logger.info("Skip: {}", skip);
  	}
  
  	public boolean isEmpty(ScmRequest request) {
 		if (!CollectionUtils.isEmpty(request.getAdds())) {
 			return false;
 		}
 		if (!CollectionUtils.isEmpty(request.getDeletes())) {
 			return false;
 		}
 		if (!CollectionUtils.isEmpty(request.getCommits())) {
 			return false;
 		}
 		return true;
 	}
 
 	public ScmService getService() {
 		return service;
 	}
 
 	public void setService(ScmService service) {
 		this.service = service;
 	}
 
 	public boolean isSkip() {
 		return skip;
 	}
 
 	public void setSkip(boolean skip) {
 		this.skip = skip;
 	}
 
 	public ScmRequest getRequest() {
 		return request;
 	}
 
 	public void setRequest(ScmRequest request) {
 		this.request = request;
 	}
 
 	public boolean isLogConfiguration() {
 		return logConfiguration;
 	}
 
 	public void setLogConfiguration(boolean logConfiguration) {
 		this.logConfiguration = logConfiguration;
 	}
 
 }