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package com.oracle.graal.python.nodes.frame;

import com.oracle.graal.python.builtins.objects.common.HashingCollectionNodes;
import com.oracle.graal.python.builtins.objects.dict.PDict;
import com.oracle.graal.python.builtins.objects.function.PArguments;
import com.oracle.graal.python.nodes.expression.ExpressionNode;
import com.oracle.graal.python.nodes.statement.StatementNode;
import com.oracle.graal.python.nodes.subscript.SetItemNode;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.strings.TruffleString;

@NodeChild(value = "rhs", type = ExpressionNode.class)
public abstract class WriteNameNode extends StatementNode implements WriteNode, AccessNameNode {
    protected final TruffleString attributeId;

    protected WriteNameNode(TruffleString attributeId) {
        this.attributeId = attributeId;
    }

    public static WriteNameNode create(TruffleString attributeId, ExpressionNode rhs) {
        return WriteNameNodeGen.create(attributeId, rhs);
    }

    public static WriteNameNode create(TruffleString attributeId) {
        return WriteNameNodeGen.create(attributeId, null);
    }

    public abstract void execute(VirtualFrame frame, Object value);

    @Specialization(guards = "!hasLocals(frame)")
    protected static void writeGlobal(VirtualFrame frame, Object value,
                    @Cached("create(attributeId)") WriteGlobalNode setItem) {
        setItem.executeObject(frame, value);
    }

    @Specialization(guards = "hasLocalsDict(frame)")
    protected void writeLocalsDict(VirtualFrame frame, Object value,
                    @Cached HashingCollectionNodes.SetItemNode setItem) {
        PDict frameLocals = (PDict) PArguments.getSpecialArgument(frame);
        setItem.execute(frame, frameLocals, attributeId, value);
    }

    @Specialization(guards = "hasLocals(frame)")
    protected void writeLocal(VirtualFrame frame, Object value,
                    @Cached SetItemNode setItem) {
        Object frameLocals = PArguments.getSpecialArgument(frame);
        setItem.executeWith(frame, frameLocals, attributeId, value);
    }

    public final TruffleString getAttributeId() {
        return attributeId;
    }
}
