/*
    * Tethys: GUI Utilities
    * Copyright 2012-2026. Tony Washer
    *
    * 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 io.github.tonywasher.joceanus.tethys.core.chart;
  
  import io.github.tonywasher.joceanus.oceanus.decimal.OceanusDecimalFormatter;
  import io.github.tonywasher.joceanus.oceanus.decimal.OceanusMoney;
  import io.github.tonywasher.joceanus.oceanus.decimal.OceanusRate;
  import io.github.tonywasher.joceanus.oceanus.event.OceanusEventManager;
  import io.github.tonywasher.joceanus.oceanus.event.OceanusEventRegistrar;
  import io.github.tonywasher.joceanus.tethys.api.base.TethysUIEvent;
  import io.github.tonywasher.joceanus.tethys.api.chart.TethysUIPieChart;
  import io.github.tonywasher.joceanus.tethys.core.base.TethysUICoreComponent;
  import io.github.tonywasher.joceanus.tethys.core.factory.TethysUICoreFactory;
  
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.LinkedHashMap;
  import java.util.Map;
  
  /**
   * Pie Chart.
   */
  public abstract class TethysUICorePieChart
          extends TethysUICoreComponent
          implements TethysUIPieChart {
      /**
       * The formatter.
       */
      private final OceanusDecimalFormatter theFormatter;
  
      /**
       * The sectionMap.
       */
      private final Map<String, TethysUIPieChartSection> theSectionMap;
  
      /**
       * The id.
       */
      private final Integer theId;
  
      /**
       * The Event Manager.
       */
      private final OceanusEventManager<TethysUIEvent> theEventManager;
  
      /**
       * The total.
       */
      private OceanusMoney theTotal;
  
      /**
       * Constructor.
       *
       * @param pFactory the Gui factory
       */
      protected TethysUICorePieChart(final TethysUICoreFactory<?> pFactory) {
          /* Build standard fields */
          theId = pFactory.getNextId();
          theEventManager = new OceanusEventManager<>();
          theFormatter = pFactory.getDataFormatter().getDecimalFormatter();
  
          /* Create the section map */
          theSectionMap = new HashMap<>();
      }
  
      @Override
      public Integer getId() {
          return theId;
      }
  
      @Override
      public OceanusEventRegistrar<TethysUIEvent> getEventRegistrar() {
          return theEventManager.getEventRegistrar();
      }
  
      @Override
      public void updatePieChart(final TethysUIPieChartData pData) {
          /* reset the existing data  */
          resetData();
  
          /* Iterate through the sections */
          final Iterator<TethysUIPieChartSection> myIterator = pData.sectionIterator();
          while (myIterator.hasNext()) {
              final TethysUIPieChartSection mySection = myIterator.next();
  
             /* Create the slice */
             createSlice(mySection);
         }
     }
 
     /**
      * Reset chart data.
      */
     protected void resetData() {
         /* Clear existing data  */
         theSectionMap.clear();
         theTotal = null;
     }
 
     /**
      * Add chart section.
      *
      * @param pSection the section to add
      */
     protected void createSlice(final TethysUIPieChartSection pSection) {
         /* Add to the section map */
         theSectionMap.put(pSection.getName(), pSection);
 
         /* Adjust the total */
         if (theTotal == null) {
             theTotal = new OceanusMoney(pSection.getValue());
         } else {
             theTotal.addAmount(pSection.getValue());
         }
     }
 
     /**
      * Obtain tooltip for sectionName.
      *
      * @param pName the section name
      * @return the tooltip
      */
     protected String getToolTip(final String pName) {
         final TethysUIPieChartSection mySection = theSectionMap.get(pName);
         final OceanusMoney myValue = mySection.getValue();
         final OceanusRate myPerCent = new OceanusRate(myValue, theTotal);
         return pName + ": ("
                 + theFormatter.formatMoney(myValue) + ", "
                 + theFormatter.formatRate(myPerCent) + ")";
     }
 
     /**
      * handle selection.
      *
      * @param pName the section name
      */
     protected void selectSection(final String pName) {
         final TethysUIPieChartSection mySection = theSectionMap.get(pName);
         theEventManager.fireEvent(TethysUIEvent.PRESSED, mySection);
     }
 
     /**
      * PieChart Data.
      */
     public static final class TethysUICorePieChartData
             implements TethysUIPieChartData {
         /**
          * The Chart Title.
          */
         private final String theTitle;
 
         /**
          * The SectionMap.
          */
         private final Map<String, TethysUIPieChartSection> theSectionMap;
 
         /**
          * Constructor.
          *
          * @param pTitle the title
          */
         TethysUICorePieChartData(final String pTitle) {
             theTitle = pTitle;
             theSectionMap = new LinkedHashMap<>();
         }
 
         @Override
         public String getTitle() {
             return theTitle;
         }
 
         @Override
         public Iterator<TethysUIPieChartSection> sectionIterator() {
             return theSectionMap.values().iterator();
         }
 
         @Override
         public void addSection(final String pName,
                                final OceanusMoney pValue,
                                final Object pSource) {
             final TethysUIPieChartSection mySection = new TethysUICorePieChartSection(pName, pValue, pSource);
             theSectionMap.put(pName, mySection);
         }
     }
 
     /**
      * The Section definition.
      */
     public static final class TethysUICorePieChartSection
             implements TethysUIPieChartSection {
         /**
          * The name of the section.
          */
         private final String theName;
 
         /**
          * The value of the section.
          */
         private final OceanusMoney theValue;
 
         /**
          * The source of the section.
          */
         private final Object theSource;
 
         /**
          * Constructor.
          *
          * @param pName   the name
          * @param pValue  the value
          * @param pSource the source
          */
         private TethysUICorePieChartSection(final String pName,
                                             final OceanusMoney pValue,
                                             final Object pSource) {
             theName = pName;
             theValue = pValue;
             theSource = pSource;
         }
 
         @Override
         public String getName() {
             return theName;
         }
 
         @Override
         public OceanusMoney getValue() {
             return theValue;
         }
 
         @Override
         public Object getSource() {
             return theSource;
         }
     }
 }