/*
    * MoneyWise: Finance Application
    * 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.moneywise.views;
  
  import io.github.tonywasher.joceanus.oceanus.date.OceanusDate;
  import io.github.tonywasher.joceanus.oceanus.decimal.OceanusRatio;
  import io.github.tonywasher.joceanus.metis.data.MetisDataEditState;
  import io.github.tonywasher.joceanus.metis.data.MetisDataState;
  import io.github.tonywasher.joceanus.metis.field.MetisFieldSet;
  import io.github.tonywasher.joceanus.metis.field.MetisFieldVersionValues;
  import io.github.tonywasher.joceanus.moneywise.data.basic.MoneyWiseBasicDataType;
  import io.github.tonywasher.joceanus.moneywise.data.basic.MoneyWiseBasicResource;
  import io.github.tonywasher.joceanus.moneywise.data.basic.MoneyWiseDataSet;
  import io.github.tonywasher.joceanus.moneywise.data.basic.MoneyWiseExchangeRate;
  import io.github.tonywasher.joceanus.moneywise.data.statics.MoneyWiseCurrency;
  import io.github.tonywasher.joceanus.moneywise.data.statics.MoneyWiseCurrency.MoneyWiseCurrencyList;
  import io.github.tonywasher.joceanus.moneywise.data.statics.MoneyWiseStaticDataType;
  import io.github.tonywasher.joceanus.prometheus.data.PrometheusDataItem;
  import io.github.tonywasher.joceanus.prometheus.data.PrometheusDataValues;
  
  import java.util.Iterator;
  import java.util.ListIterator;
  
  /**
   * Extension of ExchangeRate to cater for spot rates.
   */
  public final class MoneyWiseSpotExchangeRate
          extends MoneyWiseExchangeRate {
      /**
       * Object name.
       */
      public static final String OBJECT_NAME = MoneyWiseSpotExchangeRate.class.getSimpleName();
  
      /**
       * List name.
       */
      public static final String LIST_NAME = OBJECT_NAME + "s";
  
      /**
       * Report fields.
       */
      @SuppressWarnings("rawtypes")
      private static final MetisFieldSet<MoneyWiseSpotExchangeRate> FIELD_DEFS = MetisFieldSet.newFieldSet(MoneyWiseSpotExchangeRate.class);
  
      /*
       * The fields.
       */
      static {
          FIELD_DEFS.declareLocalField(MoneyWiseViewResource.SPOTEVENT_PREVDATE, MoneyWiseSpotExchangeRate::getPrevDate);
          FIELD_DEFS.declareLocalField(MoneyWiseViewResource.SPOTRATE_PREVRATE, MoneyWiseSpotExchangeRate::getPrevRate);
      }
  
      /**
       * the previous date.
       */
      private OceanusDate thePrevDate;
  
      /**
       * the previous rate.
       */
      private OceanusRatio thePrevRate;
  
      /**
       * Constructor for a new SpotRate where no rate data exists.
       *
       * @param pList     the Spot Rate List
       * @param pCurrency the currency
       */
      private MoneyWiseSpotExchangeRate(final MoneyWiseSpotExchangeList pList,
                                        final MoneyWiseCurrency pCurrency) {
          super(pList);
  
          /* Store base values */
          setDate(pList.theDate);
          setFromCurrency(pList.getCurrency());
          setToCurrency(pCurrency);
      }
  
      @Override
      public MetisFieldSetDef getDataFieldSet() {
          return FIELD_DEFS;
      }
  
      /**
       * Obtain previous rate.
      *
      * @return the rate.
      */
     public OceanusRatio getPrevRate() {
         return thePrevRate;
     }
 
     /**
      * Obtain previous date.
      *
      * @return the date.
      */
     public OceanusDate getPrevDate() {
         return thePrevDate;
     }
 
     /**
      * Validate the line.
      */
     @Override
     public void validate() {
         setValidEdit();
     }
 
     /* Is this row locked */
     @Override
     public boolean isLocked() {
         return isDeleted();
     }
 
     /**
      * Note that this item has been validated.
      */
     @Override
     public void setValidEdit() {
         setEditState(hasHistory()
                 ? MetisDataEditState.VALID
                 : MetisDataEditState.CLEAN);
     }
 
     @Override
     public OceanusRatio getExchangeRate() {
         /* Switch on state */
         switch (getState()) {
             case NEW:
             case CHANGED:
             case RECOVERED:
             case CLEAN:
                 return super.getExchangeRate();
             default:
                 return null;
         }
     }
 
     @Override
     public MetisDataState getState() {
         final MetisFieldVersionValues myCurr = getValues();
         final MetisFieldVersionValues myBase = getOriginalValues();
 
         /* If we have no changes we are CLEAN */
         if (myCurr.getVersion() == 0) {
             return MetisDataState.CLEAN;
         }
 
         /* If the original rate is Null */
         if (myBase.getValue(MoneyWiseBasicResource.XCHGRATE_RATE) == null) {
             /* Return status */
             return myCurr.getValue(MoneyWiseBasicResource.XCHGRATE_RATE) == null
                     ? MetisDataState.DELNEW
                     : MetisDataState.NEW;
         }
 
         /* If we are deleted return so */
         return myCurr.getValue(MoneyWiseBasicResource.XCHGRATE_RATE) == null
                 ? MetisDataState.DELETED
                 : MetisDataState.CHANGED;
     }
 
     /**
      * The Spot Rates List class.
      */
     public static class MoneyWiseSpotExchangeList
             extends MoneyWiseExchangeRateBaseList<MoneyWiseSpotExchangeRate> {
         /**
          * Report fields.
          */
         @SuppressWarnings("rawtypes")
         private static final MetisFieldSet<MoneyWiseSpotExchangeList> FIELD_DEFS = MetisFieldSet.newFieldSet(MoneyWiseSpotExchangeList.class);
 
         /*
          * The currency field Id.
          */
         static {
             FIELD_DEFS.declareLocalField(MoneyWiseStaticDataType.CURRENCY, MoneyWiseSpotExchangeList::getCurrency);
             FIELD_DEFS.declareLocalField(MoneyWiseBasicResource.MONEYWISEDATA_FIELD_DATE, MoneyWiseSpotExchangeList::getDate);
             FIELD_DEFS.declareLocalField(MoneyWiseViewResource.SPOTEVENT_NEXTDATE, MoneyWiseSpotExchangeList::getNext);
             FIELD_DEFS.declareLocalField(MoneyWiseViewResource.SPOTEVENT_PREVDATE, MoneyWiseSpotExchangeList::getPrev);
         }
 
         /**
          * The date.
          */
         private final OceanusDate theDate;
 
         /**
          * The view.
          */
         private final MoneyWiseView theView;
 
         /**
          * The currency.
          */
         private final MoneyWiseCurrency theCurrency;
 
         /**
          * The next date.
          */
         private OceanusDate theNext;
 
         /**
          * The previous date.
          */
         private OceanusDate thePrev;
 
         /**
          * Constructor.
          *
          * @param pView the view
          * @param pDate the date
          */
         public MoneyWiseSpotExchangeList(final MoneyWiseView pView,
                                          final OceanusDate pDate) {
             /* Build initial list */
             super(pView.getData(), MoneyWiseSpotExchangeRate.class, MoneyWiseBasicDataType.SECURITYPRICE);
             setStyle(PrometheusListStyle.EDIT);
             ensureMap();
 
             /* Store parameters */
             theDate = pDate;
             theView = pView;
 
             /* Obtain the portfolio bucket */
             final MoneyWiseDataSet myData = theView.getData();
             theCurrency = myData.getReportingCurrency();
             final MoneyWiseCurrencyList myCurrencies = myData.getAccountCurrencies();
 
             /* Loop through the Currencies */
             final OceanusDate myDate = new OceanusDate(theDate);
             final Iterator<MoneyWiseCurrency> myCurIterator = myCurrencies.iterator();
             while (myCurIterator.hasNext()) {
                 final MoneyWiseCurrency myCurrency = myCurIterator.next();
 
                 /* Ignore deleted/disabled and default currency */
                 boolean bIgnore = myCurrency.isDeleted() || myCurrency.isDisabled();
                 bIgnore |= myCurrency.equals(theCurrency);
                 if (bIgnore) {
                     continue;
                 }
 
                 /* Create a SpotRate entry */
                 final MoneyWiseSpotExchangeRate mySpot = new MoneyWiseSpotExchangeRate(this, myCurrency);
                 mySpot.setIndexedId(myCurrency.getIndexedId());
                 mySpot.setDate(myDate);
                 add(mySpot);
             }
 
             /* Set the base for this list */
             final MoneyWiseExchangeRateList myRates = myData.getExchangeRates();
             setBase(myRates);
 
             /* Loop through the rates */
             final ListIterator<MoneyWiseExchangeRate> myIterator = myRates.listIterator(myRates.size());
             while (myIterator.hasPrevious()) {
                 final MoneyWiseExchangeRate myRate = myIterator.previous();
 
                 /* Ignore deleted rates */
                 if (myRate.isDeleted()) {
                     continue;
                 }
 
                 /* Test the Date */
                 final int iDiff = theDate.compareTo(myRate.getDate());
 
                 /* If we are past the date */
                 if (iDiff < 0) {
                     /* Record the next date and break the loop */
                     theNext = myRate.getDate();
                     break;
                 }
 
                 /* Access the Spot Rate and ignore if not relevant */
                 final MoneyWiseCurrency myCurrency = myRate.getToCurrency();
                 final MoneyWiseSpotExchangeRate mySpot = findItemById(myCurrency.getIndexedId());
                 if (mySpot == null) {
                     continue;
                 }
 
                 /* If we are exactly the date */
                 if (iDiff == 0) {
                     /* Set rate */
                     mySpot.setValueExchangeRate(myRate.getExchangeRate());
 
                     /* Link to base and re-establish state */
                     mySpot.setBase(myRate);
 
                     /* else we are a previous date */
                 } else {
                     /* Set previous date and value */
                     mySpot.thePrevDate = myRate.getDate();
                     mySpot.thePrevRate = myRate.getExchangeRate();
 
                     /* Record the latest previous date */
                     thePrev = myRate.getDate();
                 }
             }
         }
 
         @SuppressWarnings("rawtypes")
         @Override
         public MetisFieldSet<MoneyWiseSpotExchangeList> getDataFieldSet() {
             return FIELD_DEFS;
         }
 
         @Override
         public String listName() {
             return MoneyWiseSpotExchangeList.class.getSimpleName();
         }
 
         @Override
         public MetisFieldSetDef getItemFields() {
             return MoneyWiseSpotExchangeRate.FIELD_DEFS;
         }
 
         @Override
         protected MoneyWiseSpotExchangeList getEmptyList(final PrometheusListStyle pStyle) {
             throw new UnsupportedOperationException();
         }
 
         @Override
         public MoneyWiseDataSet getDataSet() {
             return (MoneyWiseDataSet) super.getDataSet();
         }
 
         /**
          * Obtain the currency.
          *
          * @return the currency
          */
         private MoneyWiseCurrency getCurrency() {
             return theCurrency;
         }
 
         /**
          * Obtain the date.
          *
          * @return the date
          */
         private OceanusDate getDate() {
             return theDate;
         }
 
         /**
          * Obtain the next date.
          *
          * @return the date
          */
         public OceanusDate getNext() {
             return theNext;
         }
 
         /**
          * Obtain the previous date.
          *
          * @return the date
          */
         public OceanusDate getPrev() {
             return thePrev;
         }
 
         /* Is this list locked */
         @Override
         public boolean isLocked() {
             return false;
         }
 
         /* Disable Add a new item */
         @Override
         public MoneyWiseSpotExchangeRate addCopyItem(final PrometheusDataItem pElement) {
             throw new UnsupportedOperationException();
         }
 
         @Override
         public MoneyWiseSpotExchangeRate addNewItem() {
             throw new UnsupportedOperationException();
         }
 
         @Override
         public MoneyWiseSpotExchangeRate addValuesItem(final PrometheusDataValues pValues) {
             throw new UnsupportedOperationException();
         }
     }
 }