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

import static com.oracle.graal.python.nodes.BuiltinNames.DISPLAYHOOK;

import com.oracle.graal.python.builtins.PythonBuiltinClassType;
import com.oracle.graal.python.builtins.objects.PNone;
import com.oracle.graal.python.builtins.objects.module.PythonModule;
import com.oracle.graal.python.nodes.ErrorMessages;
import com.oracle.graal.python.nodes.PRaiseNode;
import com.oracle.graal.python.nodes.attributes.GetAttributeNode;
import com.oracle.graal.python.nodes.call.CallNode;
import com.oracle.graal.python.nodes.expression.ExpressionNode;
import com.oracle.graal.python.nodes.object.IsBuiltinClassProfile;
import com.oracle.graal.python.runtime.PythonContext;
import com.oracle.graal.python.runtime.exception.PException;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.frame.VirtualFrame;

public class PrintExpressionNode extends ExpressionNode {
    @Child IsBuiltinClassProfile exceptionTypeProfile;
    @Child PRaiseNode raiseNode;
    @Child GetAttributeNode getAttribute = GetAttributeNode.create(DISPLAYHOOK);
    @Child CallNode callNode = CallNode.create();
    @Child ExpressionNode valueNode;

    public PrintExpressionNode(ExpressionNode valueNode) {
        this.valueNode = valueNode;
    }

    @Override
    public Object execute(VirtualFrame frame) {
        Object value = valueNode.execute(frame);
        PythonContext context = PythonContext.get(this);
        PythonModule sysModule = context.lookupBuiltinModule("sys");
        Object displayhook;
        try {
            displayhook = getAttribute.executeObject(frame, sysModule);
        } catch (PException ex) {
            if (ensureExceptionTypeProfile().profileException(ex, PythonBuiltinClassType.AttributeError)) {
                throw ensureRaiseNode().raise(PythonBuiltinClassType.RuntimeError, ErrorMessages.LOST_SYSDISPLAYHOOK);
            } else {
                throw ex;
            }
        }
        callNode.execute(frame, displayhook, value);
        return PNone.NONE;
    }

    public static PrintExpressionNode create(ExpressionNode valueNode) {
        return new PrintExpressionNode(valueNode);
    }

    public IsBuiltinClassProfile ensureExceptionTypeProfile() {
        if (exceptionTypeProfile == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            exceptionTypeProfile = insert(IsBuiltinClassProfile.create());
        }
        return exceptionTypeProfile;
    }

    public PRaiseNode ensureRaiseNode() {
        if (raiseNode == null) {
            CompilerDirectives.transferToInterpreterAndInvalidate();
            raiseNode = insert(PRaiseNode.create());
        }
        return raiseNode;
    }
}
