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/*-
 * ========================LICENSE_START=================================
 * Scribe :: Core
 * %%
 * 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.scribe.reflection;

import org.smooks.assertion.AssertArgument;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

/**
 * @author maurice
 */
public class LookupWithPositionalQueryMethod {

    enum ParameterType {
        ARRAY,
        LIST
    }

    final Method method;

    final int queryIndex;
    final int parameterIndex;
    final ParameterType parameterType;


    /**
     *
     */
    public LookupWithPositionalQueryMethod(final Method method, final int queryIndex, final int parameterIndex) {

        AssertArgument.isNotNull(method, "method");

        if (queryIndex < 0) {
            throw new IllegalArgumentException("queryIndex can't be smaller then zero");
        }
        if (queryIndex > 1) {
            throw new IllegalArgumentException("queryIndex can't be bigger then one");
        }
        if (parameterIndex < 0) {
            throw new IllegalArgumentException("queryIndex can't be smaller then zero");
        }
        if (parameterIndex > 1) {
            throw new IllegalArgumentException("queryIndex can't be bigger then one");
        }
        if (queryIndex == parameterIndex) {
            throw new IllegalArgumentException("queryIndex and parameterIndex can't be the same");
        }

        if (method.getParameterTypes()[parameterIndex].isAssignableFrom(List.class)) {
            parameterType = ParameterType.LIST;
        } else if (method.getParameterTypes()[parameterIndex].isAssignableFrom(Object[].class)) {
            parameterType = ParameterType.ARRAY;
        } else {
            throw new IllegalArgumentException("The parameter parameter isn't assigable with a List or Object Array");
        }

        this.method = method;
        this.queryIndex = queryIndex;
        this.parameterIndex = parameterIndex;

    }

    /* (non-Javadoc)
     * @see org.smooks.scribe.method.DAOMethod#invoke()
     */
    public Collection invoke(final Object obj, final String query, final Object[] parameters) {
        final Object[] args = new Object[2];
        args[queryIndex] = query;

        if (parameterType == ParameterType.LIST) {
            args[parameterIndex] = Arrays.asList(parameters);
        } else {
            args[parameterIndex] = parameters;
        }

        try {
            return (Collection) method.invoke(obj, args);
        } catch (final IllegalArgumentException e) {
            throw new RuntimeException("The method [" + method + "] of the class [" + method.getDeclaringClass().getName() + "] threw an exception, while invoking it with the object [" + obj + "].", e);
        } catch (final IllegalAccessException e) {
            throw new RuntimeException("The method [" + method + "] of the class [" + method.getDeclaringClass().getName() + "] threw an exception, while invoking it with the object [" + obj + "].", e);
        } catch (final InvocationTargetException e) {
            throw new RuntimeException("The method [" + method + "] of the class [" + method.getDeclaringClass().getName() + "] threw an exception, while invoking it with the object [" + obj + "].", e);
        }
    }

}