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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.migration;

import java.lang.reflect.Constructor;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.stream.Collectors;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import step.core.Version;
import step.core.collections.CollectionFactory;

public class MigrationManager {
	
	private static final Logger logger = LoggerFactory.getLogger(MigrationManager.class);
	
	private final List> migrationTasks = new ArrayList<>();
	private final Map, Object> bindings = new HashMap<>();
	
	public MigrationManager() {
		super();
	}
	
	public  void addBinding(Class class_, T object) {
		bindings.put(class_, object);
	}

	/**
	 * Register a new migration task
	 * 
	 * @param migrationTask the task to be registered
	 */
	public void register(Class migrationTask) {
		migrationTasks.add(migrationTask);
	}

	/**
	 * Runs all the migration tasks registered to migrate
	 * 
	 * @param from the initial version
	 * @param to the new version
	 * @return true if the migration ran successfully 
	 */
	@SuppressWarnings("unchecked")
	public boolean migrate(CollectionFactory collectionFactory, Version from, Version to) {
		final MigrationContext migrationContext = new MigrationContext();
		bindings.forEach((k, v) -> migrationContext.put((Class