/*
 * QQQ - Low-code Application Framework for Engineers.
 * Copyright (C) 2021-2022.  Kingsrook, LLC
 * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
 * contact@kingsrook.com
 * https://github.com/Kingsrook/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package com.kingsrook.sampleapp;


import com.kingsrook.qqq.backend.core.model.metadata.QInstance;
import com.kingsrook.qqq.backend.javalin.QJavalinImplementation;
import io.javalin.Javalin;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;


/*******************************************************************************
 **
 *******************************************************************************/
public class SampleJavalinServer
{
   private static final Logger LOG = LogManager.getLogger(SampleJavalinServer.class);

   private static final int PORT = 8000;

   private QInstance qInstance;

   private Javalin javalinService;



   /*******************************************************************************
    **
    *******************************************************************************/
   public static void main(String[] args)
   {
      new SampleJavalinServer().startJavalinServer();
   }



   /*******************************************************************************
    **
    *******************************************************************************/
   public void startJavalinServer()
   {
      try
      {
         qInstance = SampleMetaDataProvider.defineInstance();

         QJavalinImplementation qJavalinImplementation = new QJavalinImplementation(qInstance);
         javalinService = Javalin.create(config ->
         {
            // todo - not all!!
            config.enableCorsForAllOrigins();
         }).start(PORT);
         javalinService.routes(qJavalinImplementation.getRoutes());

         /////////////////////////////////////////////////////////////////
         // set the server to hot-swap the q instance before all routes //
         /////////////////////////////////////////////////////////////////
         QJavalinImplementation.setQInstanceHotSwapSupplier(() ->
         {
            try
            {
               return (SampleMetaDataProvider.defineInstance());
            }
            catch(Exception e)
            {
               LOG.warn("Error hot-swapping meta data", e);
               return (null);
            }
         });
         javalinService.before(QJavalinImplementation::hotSwapQInstance);

         javalinService.after(ctx ->
            ctx.res.setHeader("Access-Control-Allow-Origin", "http://localhost:3000"));
      }
      catch(Exception e)
      {
         LOG.error("Failed to start javalin server.  See stack trace for details.", e);
      }
   }



   /*******************************************************************************
    **
    *******************************************************************************/
   public void stopJavalinServer()
   {
      if(javalinService != null)
      {
         javalinService.stop();
      }
   }
}