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/*-
 * ========================LICENSE_START=================================
 * smooks-persistence-cartridge
 * %%
 * Copyright (C) 2020 Smooks
 * %%
 * Licensed under the terms of the Apache License Version 2.0, or
 * the GNU Lesser General Public License version 3.0 or later.
 *
 * SPDX-License-Identifier: Apache-2.0 OR LGPL-3.0-or-later
 *
 * ======================================================================
 *
 * 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.
 *
 * ======================================================================
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * =========================LICENSE_END==================================
 */
package org.smooks.cartridges.persistence.parameter;

import org.smooks.api.ApplicationContext;
import org.smooks.api.ExecutionContext;
import org.smooks.api.TypedKey;
import org.smooks.cartridges.persistence.ParameterListType;

/**
 * @author [email protected]
 */
public class ParameterManager {

    private static final String PARAMETER_CONTAINER_CONTEXT_KEY = ParameterContainer.class.getName() + "#CONTEXT_KEY";

    private static final String PARAMETER_INDEX_CONTEXT_KEY = ParameterIndex.class.getName() + "#CONTEXT_KEY";


    public static String getParameterIndexName(int id) {
        return PARAMETER_INDEX_CONTEXT_KEY + "#" + id;
    }

    public static String getParameterContainerName(int id) {
        return PARAMETER_CONTAINER_CONTEXT_KEY + "#" + id;
    }

    public static ParameterIndex initializeParameterIndex(int id, ParameterListType type, ApplicationContext applicationContext) {
        ParameterIndex index = applicationContext.getRegistry().lookup(getParameterIndexName(id));
        if (index == null) {
            switch (type) {
                case NAMED:
                    index = new NamedParameterIndex();
                    break;
                case POSITIONAL:
                    index = new PositionalParameterIndex();
                    break;
                default:
                    throw new IllegalStateException("Unknown ParameterListType '" + type + "'.");
            }
            applicationContext.getRegistry().registerObject(getParameterIndexName(id), index);
        }

        return index;
    }

    public static ParameterIndex> getParameterIndex(int id, ApplicationContext applicationContext) {
        return applicationContext.getRegistry().lookup(getParameterIndexName(id));
    }

    public static void initializeParameterContainer(int id, ParameterListType type, ExecutionContext executionContext) {
        ParameterContainer container = getParameterContainer(id, executionContext);

        if (container == null) {

            switch (type) {
                case NAMED:
                    container = new NamedParameterContainer((NamedParameterIndex) getParameterIndex(id, executionContext.getApplicationContext()));
                    break;
                case POSITIONAL:
                    container = new PositionalParameterContainer((PositionalParameterIndex) getParameterIndex(id, executionContext.getApplicationContext()));
                    break;
                default:
                    throw new IllegalStateException("Unknown ParameterListType '" + type + "'.");
            }

            executionContext.put(TypedKey.of(getParameterContainerName(id)), container);

        } else {
            container.clear();
        }

    }

    @SuppressWarnings("unchecked")
    public static ParameterContainer> getParameterContainer(int id, ExecutionContext executionContext) {
        return executionContext.get(TypedKey.of(getParameterContainerName(id)));
    }


    private ParameterManager() {
    }

}