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/*
 * Copyright 2017 David Naramski.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by the
 * European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *      http://joinup.ec.europa.eu/software/page/eupl/licence-eupl
 *
 * 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.
 */
package net.nowina.cadmelia.script.module;

import net.nowina.cadmelia.construction.FactoryBuilder;
import net.nowina.cadmelia.construction.Construction;
import net.nowina.cadmelia.construction.Shape;
import net.nowina.cadmelia.script.Command;
import net.nowina.cadmelia.script.Expression;
import net.nowina.cadmelia.script.ScriptContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class OffsetModule extends UnionModule {

    private static final Logger LOGGER = LoggerFactory.getLogger(OffsetModule.class);

    public static final String MODULE_NAME = "offset";

    private FactoryBuilder factory;

    public OffsetModule(FactoryBuilder factory) {
        super(MODULE_NAME);
        this.factory = factory;
    }

    @Override
    public Construction execute(Command op, ScriptContext context) {

        Construction composition = super.execute(op, context);

        Expression exp = op.getArg("r");
        if(exp==null) {
            exp = op.getFirstUnamedArg();
        }
        Double delta = exp.evaluateAsDouble(context);

        Shape shape = (Shape) composition;

        return factory.createShapeFactory().offset(shape, delta);

    }

}