/*
    * Copyright 2010 Capgemini and Contributors
    *
    * 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 net.sf.appstatus.core.check.impl;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Properties;
  
  import net.sf.appstatus.core.AppStatus;
  import net.sf.appstatus.core.check.AbstractCheck;
  import net.sf.appstatus.core.check.IAppStatusAware;
  import net.sf.appstatus.core.check.ICheckResult;
  import net.sf.appstatus.core.services.IService;
  
  import org.apache.commons.lang3.StringUtils;
  
  /**
   * @author Nicolas Richeton
   *
   */
  public class ServicesFailureCheck extends AbstractCheck implements IAppStatusAware {
  
  	private AppStatus appStatus;
  	private int limitError = 10;
  	private int limitWarn = 5;
  
  	@Override
  	public ICheckResult checkStatus() {
  		List<IService> services = appStatus.getServiceManager().getServices();
  		List<String> warns = new ArrayList<String>();
  		List<String> errors = new ArrayList<String>();
  
  		for (IService s : services) {
  			if (s.getHits() == 0) {
  				continue;
  			}
  
  			long failureRatio = (s.getFailures() * 100) / s.getHits();
  			if (failureRatio > limitError) {
  				errors.add("Service <b>" + s.getGroup() + "#" + s.getName() + "</b> failure ratio (" + failureRatio
  						+ "%) is over error limit (" + limitError + "%)");
  			} else if (failureRatio > limitWarn) {
  				warns.add("Service <b>" + s.getGroup() + "#" + s.getName() + "</b> failure ratio (" + failureRatio
  						+ "%) is over warn limit (" + limitWarn + "%)");
  			}
  		}
  
  		ICheckResult result = null;
  		if (errors.size() > 0) {
  			String description = StringUtils.join(errors, "<br/>");
  			if (warns.size() > 0) {
  				description = description + " <br/>Additional warnings: " + StringUtils.join(warns, "<br/>");
  			}
  			result = result(this).code(ICheckResult.ERROR).fatal().description(description).build();
  		} else if (warns.size() > 0) {
  			result = result(this).code(ICheckResult.ERROR).description(StringUtils.join(warns, "<br/>")).build();
  		} else {
  			result = result(this).code(ICheckResult.OK).description("All failure ratios under " + limitWarn + "%")
  					.build();
  		}
  		return result;
  	}
  
  	public String getGroup() {
  		return "Services";
  	}
  
  	public String getName() {
  		return "Failures";
  	}
  
  	public void setAppStatus(AppStatus appStatus) {
  		this.appStatus = appStatus;
  
  	}
  
  	@Override
  	public void setConfiguration(Properties configuration) {
  		super.setConfiguration(configuration);
  
  		String error = getConfiguration().getProperty("serviceFailureCheck.limitError");
  		if (error != null) {
  			limitError = Integer.valueOf(error);
  		}
  
  		String warn = getConfiguration().getProperty("serviceFailureCheck.limitWarn");
 		if (warn != null) {
 			limitWarn = Integer.valueOf(warn);
 		}
 	}
 }