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/*******************************************************************************
 * Copyright (C) 2020, exense GmbH
 *  
 * This file is part of STEP
 *  
 * STEP is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *  
 * STEP is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *  
 * You should have received a copy of the GNU Affero General Public License
 * along with STEP.  If not, see .
 ******************************************************************************/
package step.core.objectenricher;

import step.core.AbstractContext;
import step.core.collections.Filter;
import step.core.collections.PojoFilter;
import step.core.collections.PojoFilters;
import step.core.ql.OQLFilterBuilder;

import java.util.ArrayList;
import java.util.Objects;
import java.util.stream.Collectors;

public class ObjectHookRegistry extends ArrayList {

	/**
	 * @param context
	 * @return the composed {@link ObjectFilter} based on all the registered hooks
	 */
	public ObjectFilter getObjectFilter(AbstractContext context) {
		return ObjectFilterComposer
				.compose(stream().map(hook -> hook.getObjectFilter(context)).collect(Collectors.toList()));
	}

	/**
	 * @param context
	 * @return the composed {@link ObjectEnricher} based on all the registered hooks
	 */
	public ObjectEnricher getObjectEnricher(AbstractContext context) {
		return ObjectEnricherComposer
				.compose(stream().map(hook -> hook.getObjectEnricher(context)).collect(Collectors.toList()));
	}

	/**
	 * Rebuilds an {@link AbstractContext} based on an object that has been
	 * previously enriched with the composed {@link ObjectEnricher} of this registry
	 * 
	 * @param context the context to be recreated
	 * @param object the object to base the context reconstruction on
	 * @throws Exception
	 */
	public void rebuildContext(AbstractContext context, EnricheableObject object) throws Exception {
		this.forEach(hook->{
			try {
				hook.rebuildContext(context, object);
			} catch (Exception e) {
				throw new RuntimeException(e);
			}
		});
	}
	
	/**
	 * @param context
	 * @param object
	 * @return true if the provided object belongs to the provided context or
	 *         doesn't belong to any context
	 */
	public boolean isObjectAcceptableInContext(AbstractContext context, EnricheableObject object) {
		return this.stream().allMatch(hook -> hook.isObjectAcceptableInContext(context, object));
	}

	public ObjectPredicate getObjectPredicate(AbstractContext context) {
		ObjectFilter objectFilter = getObjectFilter(context);
		String oqlFilter = objectFilter.getOQLFilter();
		PojoFilter