/*
    * (c) Copyright 2006-2020 by rapiddweller GmbH & Volker Bergmann. All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, is permitted under the terms of the
    * GNU General Public License.
    *
    * For redistributing this software or a derivative work under a license other
    * than the GPL-compatible Free Software License as defined by the Free
   * Software Foundation or approved by OSI, you must first obtain a commercial
   * license to this software product from rapiddweller GmbH & Volker Bergmann.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
   * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
   * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  package com.rapiddweller.benerator.main;
  
  import com.rapiddweller.benerator.template.TemplateInputReader;
  import com.rapiddweller.common.BeanUtil;
  import com.rapiddweller.common.ConfigurationError;
  import com.rapiddweller.common.Context;
  import com.rapiddweller.common.StringUtil;
  import com.rapiddweller.common.context.DefaultContext;
  import com.rapiddweller.common.ui.ConsoleInfoPrinter;
  import com.rapiddweller.format.script.Script;
  import com.rapiddweller.format.script.freemarker.FreeMarkerScriptFactory;
  
  import java.io.FileWriter;
  import java.io.IOException;
  import java.io.Writer;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Anonymizes XML files homogeneously based on generator and XPath definitions in an Excel sheet.<br/><br/>
   * Created: 27.02.2014 10:04:58
   *
   * @author Volker Bergmann
   * @since 0.9.0
   */
  public class TemplateRunner {
  
    /**
     * The entry point of application.
     *
     * @param args the input arguments
     * @throws Exception the exception
     */
    public static void main(String[] args) throws Exception {
      // extract possible VM params from argument list
      List<String> params = processCmdLineArgs(args);
  
  
      // check preconditions
      if (params.size() < 3 || params.size() > 4) {
        printHelpAndExit();
      }
  
      // parse parameters
      String configFile = params.get(0);
      String configParserClass = params.get(1);
      String templateFile = params.get(2);
      String generatedFile = (params.size() == 4 ? params.get(3) : "benerator.xml");
  
      // generate descriptor file
      TemplateInputReaderom/rapiddweller/benerator/template/TemplateInputReader.html#TemplateInputReader">TemplateInputReader reader = (TemplateInputReader) BeanUtil.newInstance(configParserClass);
      Context context = new DefaultContext();
      reader.parse(configFile, context);
      createDescriptor(context, templateFile, generatedFile);
  
      // run descriptor file
      runDescriptor(generatedFile);
    }
  
    private static List<String> processCmdLineArgs(String[] args) {
      List<String> params = new ArrayList<>();
      for (String arg : args) {
        if (arg.startsWith("-D")) {
          String[] tokens = StringUtil.splitOnFirstSeparator(arg.substring(2), '=');
          if (tokens.length == 2) {
            System.setProperty(tokens[0], tokens[1]);
          }
        } else {
          params.add(arg);
        }
      }
      return params;
    }
 
   @SuppressWarnings("checkstyle:FileTabCharacter")
   private static void printHelpAndExit() {
     ConsoleInfoPrinter.printHelp(
         "The class " + TemplateRunner.class.getName(),
         "creates and runs Benerator descriptor files from custom templates. It has the following parameters:",
         "<config_file> <config_parser_class> <template_file> [<generated_file>]",
         "	config_file:         Path of an individual data file to provide configuration",
         "	config_parser_class: Fully qualified name of a Java class which is able to parse the config_file",
         "	template file:       File path of a FreeMarker template to generate a Benerator descriptor file",
         "	generated_file:      File path of the generated Benerator descriptor file"
     );
     System.exit(-1);
   }
 
   private static void createDescriptor(Context context, String templateUri, String targetUri) {
     try {
       Script script = new FreeMarkerScriptFactory().readFile(templateUri);
       Writer out = new FileWriter(targetUri);
       script.execute(context, out);
     } catch (Exception e) {
       throw new ConfigurationError("Error generating descriptor file " + targetUri, e);
     }
   }
 
   private static void runDescriptor(String descriptorUri) throws IOException {
     Benerator.main(new String[] {descriptorUri});
   }
 
 }