/*******************************************************************************
    * Copyhacked (H) 2012-2025.
    * This program and the accompanying materials
    * are made available under no term at all, use it like
    * you want, but share and discuss it
    * every time possible with every body.
    * 
    * Contributors:
    *      ron190 at ymail dot com - initial implementation
   ******************************************************************************/
  package com.jsql.view.swing.list;
  
  import com.jsql.util.LogLevelUtil;
  import org.apache.commons.lang3.StringUtils;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  import org.json.JSONArray;
  import org.json.JSONException;
  import org.json.JSONObject;
  
  import javax.swing.*;
  import java.awt.datatransfer.DataFlavor;
  import java.awt.datatransfer.UnsupportedFlavorException;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Handler for processing cut/copy/paste/drag/drop action on a JList items.
   */
  public class ListTransfertHandlerScan extends AbstractListTransfertHandler {
      
      private static final Logger LOGGER = LogManager.getRootLogger();
  
      @Override
      protected List<Integer> initStringPaste(String clipboardText, int selectedIndexFrom, DefaultListModel<ItemList> listModel) {
          int selectedIndexTo = selectedIndexFrom;
          List<Integer> selectedIndexes = new ArrayList<>();
          for (ItemListScan itemListScan: ListTransfertHandlerScan.parse(clipboardText)) {
              selectedIndexes.add(selectedIndexTo);
              listModel.add(selectedIndexTo++, itemListScan);
          }
          return selectedIndexes;
      }
  
      @Override
      protected String initTransferable() {
          List<JSONObject> jsons = new ArrayList<>();
          var stringTransferable = new StringBuilder();
          try {
              for (ItemList itemPath: this.dragPaths) {
                  ItemListScan itemScanPath = (ItemListScan) itemPath;
                  jsons.add(new JSONObject(itemScanPath.getBeanInjectionToJSON()));
              }
              stringTransferable.append(new JSONArray(jsons).toString(4));
          } catch (JSONException e) {
              LOGGER.log(LogLevelUtil.CONSOLE_JAVA, e.getMessage(), e);
          }
          return stringTransferable.toString();
      }
  
      @Override
      protected void parseStringDrop(TransferSupport support, DnDList list, DefaultListModel<ItemList> listModel) {
          var dropLocation = (JList.DropLocation) support.getDropLocation();
          int indexDropLocation = dropLocation.getIndex();
  
          List<Integer> listSelectedIndices = new ArrayList<>();
  
          if (this.dragPaths != null && !this.dragPaths.isEmpty()) {  // DnD from list
              for (ItemList itemPath: this.dragPaths) {
                  if (StringUtils.isNotEmpty(itemPath.toString())) {
                      ItemListScan itemDrag = (ItemListScan) itemPath;  //! FUUuu
                      var itemDrop = new ItemListScan(itemDrag.getBeanInjection());
                      listSelectedIndices.add(indexDropLocation);
                      listModel.add(indexDropLocation++, itemDrop);
                  }
              }
          } else {  // DnD from outside
              try {
                  var importString = (String) support.getTransferable().getTransferData(DataFlavor.stringFlavor);
                  for (ItemListScan itemListScan: ListTransfertHandlerScan.parse(importString)) {
                      listSelectedIndices.add(indexDropLocation);
                      listModel.add(indexDropLocation++, itemListScan);
                  }
              } catch (UnsupportedFlavorException | IOException e) {
                  LOGGER.log(LogLevelUtil.CONSOLE_JAVA, e, e);
              }
          }
  
          var selectedIndices = new int[listSelectedIndices.size()];
          var i = 0;
          for (Integer integer: listSelectedIndices) {
              selectedIndices[i] = integer;
              i++;
          }
          list.setSelectedIndices(selectedIndices);
      }
      
      public static List<ItemListScan> parse(String clipboardText) {
         List<ItemListScan> itemsParsed = new ArrayList<>();
         try {
             ListTransfertHandlerScan.parseJsonArray(clipboardText, itemsParsed);
         } catch (JSONException eJsonArray) {
             ListTransfertHandlerScan.parseJsonObject(clipboardText, itemsParsed);
         }
         return itemsParsed;
     }
 
     private static void parseJsonArray(String clipboardText, List<ItemListScan> itemsParsed) {
         var itemsJsonArray = new JSONArray(clipboardText);
         for (var i = 0; i < itemsJsonArray.length(); i++) {
             var newItem = new ItemListScan(itemsJsonArray.getJSONObject(i));
             itemsParsed.add(newItem);
         }
     }
 
     private static void parseJsonObject(String clipboardText, List<ItemListScan> itemsParsed) {
         try {
             var newItem = new ItemListScan(new JSONObject(clipboardText));
             itemsParsed.add(newItem);
         } catch (JSONException e) {
             for (String url: clipboardText.split("\\n")) {
                 var beanInjection = new BeanInjection(url);
                 var newItem = new ItemListScan(beanInjection);
                 itemsParsed.add(newItem);
             }
         }
     }
 }