/**

  * Copyright 2009 Martin Vysny.

  *

  * This file is part of WebVM.

  *

  * WebVM is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, either version 3 of the License, or

  * (at your option) any later version.

  *

  * WebVM is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with WebVM.  If not, see <http://www.gnu.org/licenses/>.

  */

 package sk.baka.webvm;

 import java.lang.reflect.Field;

 import java.util.ArrayList;

 import java.util.EnumSet;

 import org.apache.wicket.MarkupContainer;

 import org.apache.wicket.markup.html.form.Button;

 import org.apache.wicket.markup.html.form.DropDownChoice;

 import org.apache.wicket.markup.html.form.Form;

 import org.apache.wicket.markup.html.form.FormComponent;

 import org.apache.wicket.markup.html.form.PasswordTextField;

 import org.apache.wicket.markup.html.form.TextField;

 import org.apache.wicket.markup.html.panel.FeedbackPanel;

 import org.apache.wicket.model.PropertyModel;

 import org.apache.wicket.validation.IValidator;

 import org.apache.wicket.validation.validator.RangeValidator;

 import sk.baka.webvm.misc.NotificationDelivery;

 import sk.baka.webvm.analyzer.ProblemAnalyzer;

 import sk.baka.webvm.config.Bind;

 import sk.baka.webvm.config.Config;

 /**

  * The WebVM configuration. The configuration is not persistent.

  * @author Martin Vysny

  */

 public final class Configure extends WebVMPage {

     private static final long serialVersionUID = 1L;

     /**

      * Creates the configure page.

      */

     public Configure() {

         // submitting forms in a page with multiple forms fails: http://issues.apache.org/jira/browse/WICKET-2134

         border.add(new ConfigForm("problemsForm", Config.GROUP_PROBLEMS));

         border.add(new MailForm("mailForm"));

         border.add(new JabberForm("jabberForm"));

     }

     @SuppressWarnings("unchecked")

     private static void bind(final MarkupContainer c, final Object bean, final int group) {

         for (final Field field : bean.getClass().getFields()) {

             final Bind annotation = field.getAnnotation(Bind.class);

             if (annotation == null) {

                 continue;

             }

             if (group >= 0 && annotation.group() != group) {

                 continue;

             }

             final FormComponent<?> f;

             if (Enum.class.isAssignableFrom(field.getType())) {

                 final Class<? extends Enum> clazz = field.getType().asSubclass(Enum.class);

                 final EnumSet<? extends Enum> allConstants = EnumSet.allOf(clazz);

                 f = new DropDownChoice<Enum>(annotation.key(), new PropertyModel<Enum>(bean, field.getName()), new ArrayList<Enum>(allConstants));

             } else if (annotation.password()) {

                 f = new PasswordTextField(annotation.key(), new PropertyModel<String>(bean, field.getName()));

             } else {

                 final TextField<Object> tf = new TextField<Object>(annotation.key(), new PropertyModel<Object>(bean, field.getName()));

                 if ((annotation.min() != Integer.MIN_VALUE) || (annotation.max() != Integer.MAX_VALUE)) {

                     // we know there will be only ints annotated

                     tf.add((IValidator) new RangeValidator<Integer>(annotation.min(), annotation.max()));

                 }

                 f = tf;

             }

             f.setRequired(annotation.required());

             c.add(f);

         }

     }

     /**

      * A basic configuration form, handles retrieval of config object.

      */

     protected static class ConfigForm extends Form<Config> {

         private static final long serialVersionUID = 1L;

         /**

          * The configuration object.

          */

         protected final Config config = new Config(WicketApplication.getConfig());

         /**

          * Creates new form.

          * @param componentName wicket id

          * @param group bind only this group to the form, -1 to all groups

          */

         public ConfigForm(final String componentName, final int group) {

             super(componentName);

             add(new FeedbackPanel("feedback"));

             bind(this, config, group);

             add(new Button("submit"));

         }

         @Override

         public final void onSubmit() {

             WicketApplication.setConfig(config);

         }

     }

     /**

      * A mail form, supports sending of a test mail.

      */

     private static class MailForm extends ConfigForm {

         public MailForm(String componentName) {

             super(componentName, Config.GROUP_MAIL);

         }

         private static final long serialVersionUID = 1L;

         {

             add(new Button("sendTestMail") {

                 private static final long serialVersionUID = 1L;

                 @Override

                 public void onSubmit() {

                     if (!NotificationDelivery.isEmailEnabled(config)) {

                         error("No SMTP host name is entered, mail notification is disabled");

                         return;

                     }

                     final ProblemAnalyzer pa = new ProblemAnalyzer();

                     pa.configure(config);

                     try {

                         NotificationDelivery.sendEmail(config, true, pa.getProblems(WicketApplication.getHistory().getVmstatHistory()));

                     } catch (Exception ex) {

                         error("Failed to send a message: " + ex.toString());

                     }

                 }

             });

         }

     }

     /**

      * A Jabber configuration form, supports sending a simple notification Jabber message.

      */

     private static class JabberForm extends ConfigForm {

         public JabberForm(String componentName) {

             super(componentName, Config.GROUP_JABBER);

         }

         private static final long serialVersionUID = 1L;

         {

             add(new Button("sendTestJabber") {

                 private static final long serialVersionUID = 1L;

                 @Override

                 public void onSubmit() {

                     if (!NotificationDelivery.isJabberEnabled(config)) {

                         error("No Jabber server is entered, jabber notification is disabled");

                         return;

                     }

                     final ProblemAnalyzer pa = new ProblemAnalyzer();

                     pa.configure(config);

                     try {

                         NotificationDelivery.sendJabber(config, true, pa.getProblems(WicketApplication.getHistory().getVmstatHistory()));

                     } catch (Exception ex) {

                         error("Failed to send a message: " + ex.toString());

                     }

                 }

             });

         }

     }

 }