/*

 *

 * ====================================================================

 *

 * Copyright 2004 The Apache Software Foundation 

 *

 * 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 org.apache.commons.contract.util;

 import java.util.HashMap;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Locale;

 import java.util.Map;

 import org.apache.commons.contract.Context;

 import org.apache.commons.contract.ContractViolationException;

 import org.apache.commons.contract.Executor;

 import org.apache.commons.contract.Information;

 import org.apache.commons.contract.Processor;

 import org.apache.commons.contract.Result;

 import org.apache.commons.contract.context.VMContext;

 import org.apache.commons.contract.descriptor.ParameterDescriptor;

 import org.apache.commons.i18n.LocalizedException;

 import org.apache.commons.i18n.XMLMessageProvider;

 import org.apache.commons.i18n.bundles.MessageBundle;

 public class MainWrapper {

     static {

         // FIXME - install() method has been removed

         //XMLMessageProvider.install("contract/util", Thread.currentThread().getContextClassLoader().getResourceAsStream("util.xml"));

     }

     private static MessageBundle usage = new MessageBundle("usage");

     public static Result main(String []args, Processor processor) {

         Context context = new VMContext();

         ParameterDescriptor[] parameterDescriptors = processor.getParameterDescriptors();

         Map parameters = new HashMap();

         for ( int i = 0; i < parameterDescriptors.length; i++ ) {

             if ( i < args.length ) {

                 parameters.put(parameterDescriptors[i].getName(), args[i]);

             }

         }

         try {

             return Executor.process(processor, parameters, context);

         } catch ( ContractViolationException exception ) {

             System.out.println(exception.getErrorMessage().getTitle(Locale.getDefault()));

             System.out.print(exception.getErrorMessage().getDetails(Locale.getDefault()));

             Throwable throwable = (Throwable)exception;

             while ( throwable.getCause() != null ) {

                 throwable = throwable.getCause();

                 if ( throwable instanceof LocalizedException ) { 

                    System.out.print(" "+((LocalizedException)throwable).getErrorMessage().getDetails(Locale.getDefault()));

                 } else {

                     System.out.print(" "+throwable.getMessage());

                 }

             }

             System.out.println();

             System.out.println();

             printUsage(processor);

         } catch ( Exception exception ) {

             exception.printStackTrace();

         }

         return null;

     }

     public static void printUsage(Processor processor) {

         System.out.println(usage.getTitle(Locale.getDefault()));

         System.out.println(usage.getText(Locale.getDefault()));

         ParameterDescriptor[] parameterDescriptors = processor.getParameterDescriptors();

         for ( int i = 0; i < parameterDescriptors.length; i++ ) {

             System.out.print((i+1)+". ");

             printParameterInfo(parameterDescriptors[i]);

         }

     }

     public static void printParameterInfo(ParameterDescriptor parameterDescriptor) {

         System.out.println(parameterDescriptor.getDescription().getTitle(Locale.getDefault()));

         System.out.println(parameterDescriptor.getDescription().getText(Locale.getDefault()));

         System.out.println(parameterDescriptor.getConstraints().verboseConstraints().getText(Locale.getDefault()));

     }

     public static void printException(ContractViolationException exception) {

         System.out.println(exception.getErrorMessage().getTitle(Locale.getDefault()));

         System.out.print(exception.getErrorMessage().getDetails(Locale.getDefault()));

         Throwable throwable = (Throwable)exception;

         while ( throwable.getCause() != null ) {

             throwable = throwable.getCause();

             if ( throwable instanceof LocalizedException ) { 

                 System.out.print(" "+((LocalizedException)throwable).getErrorMessage().getDetails(Locale.getDefault()));

             } else {

                 System.out.print(" "+throwable.getMessage());

             }

         }

         System.out.println();

     }

     public static void printInformations(List informations) {

         for ( Iterator i = informations.iterator(); i.hasNext(); ) {

             Information information = (Information)i.next();

             System.out.println("Folgendes: "+information.getErrorBundle().getText(Locale.getDefault()));

         }

     }

 }