/*
 *  Copyright (C) 2010-2016 JPEXS, All rights reserved.
 *
 * This library 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 3.0 of the License, or (at your option) any later version.
 *
 * This library 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 library.
 */
package com.jpexs.decompiler.flash.abc.avm2.model;

import com.jpexs.decompiler.flash.helpers.GraphTextWriter;
import com.jpexs.decompiler.graph.GraphSourceItem;
import com.jpexs.decompiler.graph.GraphTargetItem;
import com.jpexs.decompiler.graph.TypeItem;
import com.jpexs.decompiler.graph.model.LocalData;
import java.util.Set;

/**
 *
 * @author JPEXS
 */
public class DecrementAVM2Item extends AVM2Item {

    public DecrementAVM2Item(GraphSourceItem instruction, GraphSourceItem lineStartIns, GraphTargetItem object) {
        super(instruction, lineStartIns, PRECEDENCE_ADDITIVE, object);
    }

    @Override
    public GraphTextWriter appendTo(GraphTextWriter writer, LocalData localData) throws InterruptedException {
        value.toString(writer, localData);
        return writer.append(" - 1");
    }

    @Override
    public boolean isCompileTime(Set<GraphTargetItem> dependencies) {
        if (dependencies.contains(value)) {
            return false;
        }
        dependencies.add(value);
        return value.isCompileTime(dependencies);
    }

    @Override
    public Object getResult() {
        return value.getResultAsNumber() - 1;
    }

    @Override
    public GraphTargetItem returnType() {
        return TypeItem.UNBOUNDED;
    }

    @Override
    public boolean hasReturnValue() {
        return true;
    }
}