/*
    * SPDX-FileCopyrightText: none
    * SPDX-License-Identifier: CC0-1.0
    */
   
   package dev.metaschema.core.metapath.item.atomic.impl;
   
   import java.math.BigDecimal;
   import java.math.BigInteger;
  import java.util.Objects;
  
  import dev.metaschema.core.datatype.adapter.DecimalAdapter;
  import dev.metaschema.core.datatype.adapter.MetaschemaDataTypeProvider;
  import dev.metaschema.core.metapath.item.atomic.IDecimalItem;
  import edu.umd.cs.findbugs.annotations.NonNull;
  
  /**
   * An implementation of a Metapath atomic item containing a decimal data value.
   */
  public class DecimalItemImpl
      extends AbstractDecimalItem<BigDecimal> {
    @NonNull
    private static final BigDecimal BOOLEAN_TRUE = new BigDecimal("1.0");
    @NonNull
    private static final BigDecimal BOOLEAN_FALSE = new BigDecimal("0.0");
  
    /**
     * Get the equivalent decimal value for the provided boolean value.
     *
     * @param value
     *          the boolean value
     * @return the equivalent decimal value
     */
    @NonNull
    public static BigDecimal toBigDecimal(boolean value) {
      return value ? BOOLEAN_TRUE : BOOLEAN_FALSE;
    }
  
    /**
     * Construct a new item with the provided {@code value}.
     *
     * @param value
     *          the value to wrap
     */
    public DecimalItemImpl(@NonNull BigDecimal value) {
      super(value);
    }
  
    @Override
    public DecimalAdapter getJavaTypeAdapter() {
      return MetaschemaDataTypeProvider.DECIMAL;
    }
  
    @Override
    public BigDecimal asDecimal() {
      return getValue();
    }
  
    @SuppressWarnings("null")
    @Override
    public String asString() {
      BigDecimal decimal = getValue();
      // if the fractional part is empty, render as an integer
      return decimal.scale() <= 0 ? decimal.toBigIntegerExact().toString() : decimal.toPlainString();
    }
  
    @SuppressWarnings("null")
    @Override
    public BigInteger asInteger() {
      return getValue().toBigInteger();
    }
  
    @Override
    public int hashCode() {
      return Objects.hash(asDecimal());
    }
  
    @Override
    public boolean equals(Object obj) {
      return this == obj
          || obj instanceof IDecimalItem && compareTo((IDecimalItem) obj) == 0;
    }
  }