/*
    * Prometheus: Application Framework
    * 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.prometheus.maps;
  
  import io.github.tonywasher.joceanus.oceanus.format.OceanusDataFormatter;
  import io.github.tonywasher.joceanus.metis.field.MetisFieldItem;
  import io.github.tonywasher.joceanus.metis.field.MetisFieldSet;
  import io.github.tonywasher.joceanus.prometheus.data.PrometheusDataItem;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * InstanceMap Elements.
   */
  public interface PrometheusMapsInstanceElement
          extends MetisFieldItem {
      /**
       * Obtain the list of items.
       *
       * @return the list
       */
      List<PrometheusDataItem> getList();
  
      /**
       * Instance Element Item.
       */
      class PrometheusMapsInstanceElementItem
              implements PrometheusMapsInstanceElement {
          /**
           * Report fields.
           */
          private static final MetisFieldSet<PrometheusMapsInstanceElementItem> FIELD_DEFS
                  = MetisFieldSet.newFieldSet(PrometheusMapsInstanceElementItem.class);
  
          /*
           * Declare Fields.
           */
          static {
              FIELD_DEFS.declareLocalField(PrometheusMapsResource.MAPS_ITEM, PrometheusMapsInstanceElementItem::getItem);
          }
  
          /**
           * The item.
           */
          private final PrometheusDataItem theItem;
  
          /**
           * Constructor.
           *
           * @param pItem the item
           */
          PrometheusMapsInstanceElementItem(final PrometheusDataItem pItem) {
              theItem = pItem;
          }
  
          @Override
          public MetisFieldSetDef getDataFieldSet() {
              return FIELD_DEFS;
          }
  
          @Override
          public String formatObject(final OceanusDataFormatter pFormatter) {
              return pFormatter.formatObject(theItem);
          }
  
          /**
           * Obtain the item.
           *
           * @return the item
           */
          PrometheusDataItem getItem() {
              return theItem;
          }
  
          @Override
          public List<PrometheusDataItem> getList() {
              /* Obtain the item as a list */
              final List<PrometheusDataItem> myList = new ArrayList<>();
              myList.add(theItem);
              return myList;
          }
      }
  
      /**
      * Instance Element List.
      */
     class PrometheusMapsInstanceElementList
             implements PrometheusMapsInstanceElement {
         /**
          * Report fields.
          */
         private static final MetisFieldSet<PrometheusMapsInstanceElementList> FIELD_DEFS
                 = MetisFieldSet.newFieldSet(PrometheusMapsInstanceElementList.class);
 
         /*
          * Declare Fields.
          */
         static {
             FIELD_DEFS.declareLocalField(PrometheusMapsResource.MAPS_ITEMLIST, PrometheusMapsInstanceElementList::getList);
         }
 
         /**
          * The list.
          */
         private final List<PrometheusDataItem> theList;
 
         /**
          * Constructor.
          *
          * @param pPrevious the previous element
          * @param pItem     the item
          */
         PrometheusMapsInstanceElementList(final PrometheusMapsInstanceElement pPrevious,
                                           final PrometheusDataItem pItem) {
             /* Create the new list */
             theList = new ArrayList<>(pPrevious.getList());
             theList.add(pItem);
         }
 
         @Override
         public MetisFieldSetDef getDataFieldSet() {
             return FIELD_DEFS;
         }
 
         @Override
         public String formatObject(final OceanusDataFormatter pFormatter) {
             return PrometheusMapsInstanceElementList.class.getSimpleName();
         }
 
         @Override
         public List<PrometheusDataItem> getList() {
             return theList;
         }
     }
 }