/*
    * SPDX-FileCopyrightText: none
    * SPDX-License-Identifier: CC0-1.0
    */
   
   package dev.metaschema.databind.model;
   
   import java.lang.reflect.Field;
   import java.lang.reflect.Type;
  
  import edu.umd.cs.findbugs.annotations.NonNull;
  
  /**
   * Provides access to a Java field that is bound to a Metaschema instance.
   */
  @FunctionalInterface
  public interface IFeatureJavaField extends IValuedMutable {
  
    /**
     * Gets the bound Java field associated with this instance.
     *
     * @return the Java field
     */
    @NonNull
    Field getField();
  
    /**
     * Get the actual Java type of the underlying bound object.
     * <p>
     * This may be the same as the what is returned by {@link #getItemType()}, or
     * may be a Java collection class.
     *
     * @return the raw type of the bound object
     */
    @SuppressWarnings("null")
    @NonNull
    default Type getType() {
      return getField().getGenericType();
    }
  
    /**
     * Get the item type of the bound object. An item type is the primitive or
     * specialized type that represents that data associated with this binding.
     *
     * @return the item type of the bound object
     */
    @NonNull
    default Class<?> getItemType() {
      return (Class<?>) getType();
    }
  
    @Override
    default Object getValue(@NonNull Object parent) {
      Field field = getField();
      // boolean accessable = field.canAccess(parent);
      // field.setAccessible(true);
      Object retval;
      try {
        Object result = field.get(parent);
        retval = result;
      } catch (IllegalArgumentException | IllegalAccessException ex) {
        throw new IllegalArgumentException(
            String.format("Unable to get the value of field '%s' in class '%s'.", field.getName(),
                field.getDeclaringClass().getName()),
            ex);
        // } finally {
        // field.setAccessible(accessable);
      }
      return retval;
    }
  
    @Override
    default void setValue(@NonNull Object parentObject, Object value) {
      Field field = getField();
      // boolean accessable = field.canAccess(parentObject);
      // field.setAccessible(true);
      try {
        field.set(parentObject, value);
      } catch (IllegalArgumentException | IllegalAccessException ex) {
        throw new IllegalArgumentException(
            String.format(
                "Unable to set the value of field '%s' in class '%s'." +
                    " Perhaps this is a data type adapter problem on the declared class?",
                field.getName(),
                field.getDeclaringClass().getName()),
            ex);
        // } finally {
        // field.setAccessible(accessable);
      }
    }
  
  }