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package com.oracle.graal.python.builtins.modules;

import org.junit.Rule;
import org.junit.rules.ExpectedException;

import com.oracle.graal.python.PythonLanguage;
import com.oracle.graal.python.builtins.objects.function.PArguments;
import com.oracle.graal.python.builtins.objects.function.Signature;
import com.oracle.graal.python.nodes.PRootNode;
import com.oracle.graal.python.nodes.call.CallTargetInvokeNode;
import com.oracle.graal.python.nodes.function.builtins.clinic.ArgumentCastNode;
import com.oracle.graal.python.runtime.ExecutionContext.CalleeContext;
import com.oracle.graal.python.runtime.ExecutionContext.IndirectCalleeContext;
import com.oracle.graal.python.runtime.GilNode;
import com.oracle.graal.python.runtime.PythonContext;
import com.oracle.graal.python.runtime.PythonContext.PythonThreadState;
import com.oracle.graal.python.runtime.exception.PException;
import com.oracle.truffle.api.RootCallTarget;
import com.oracle.truffle.api.frame.VirtualFrame;

import static com.oracle.graal.python.util.PythonUtils.tsArray;

public class ConversionNodeTests {
    static final Signature SIGNATURE = new Signature(-1, false, -1, false, tsArray("arg"), null);
    @Rule public ExpectedException expectedException = ExpectedException.none();

    protected static Object call(Object arg, ArgumentCastNode castNode) {
        PythonLanguage language = PythonLanguage.get(castNode);
        final PythonContext pythonContext = PythonContext.get(castNode);

        RootCallTarget callTarget = new PRootNode(language) {
            @Child private CalleeContext calleeContext = CalleeContext.create();
            @Child private ArgumentCastNode node = castNode;

            @Override
            public Object execute(VirtualFrame frame) {
                GilNode gilNode = GilNode.getUncached();
                boolean wasAcquired = gilNode.acquire();
                calleeContext.enter(frame);
                try {
                    return node.execute(frame, PArguments.getArgument(frame, 0));
                } finally {
                    calleeContext.exit(frame, this);
                    gilNode.release(wasAcquired);
                }
            }

            @Override
            public Signature getSignature() {
                return SIGNATURE;
            }

            @Override
            public boolean isPythonInternal() {
                return true;
            }
        }.getCallTarget();
        try {
            Object[] arguments = PArguments.create(1);
            PArguments.setGlobals(arguments, pythonContext.factory().createDict());
            PArguments.setException(arguments, PException.NO_EXCEPTION);
            PArguments.setArgument(arguments, 0, arg);
            PythonThreadState threadState = pythonContext.getThreadState(language);
            Object state = IndirectCalleeContext.enter(threadState, arguments, callTarget);
            try {
                return CallTargetInvokeNode.invokeUncached(callTarget, arguments);
            } finally {
                IndirectCalleeContext.exit(threadState, state);
            }
        } catch (PException e) {
            // materialize PException's error message since we are leaving Python
            PException exceptionForReraise = e.getExceptionForReraise();
            exceptionForReraise.setMessage(exceptionForReraise.getUnreifiedException().getFormattedMessage());
            throw exceptionForReraise;
        }
    }

    protected void expectPythonMessage(String expectedMessage) {
        expectedException.expect(PException.class);
        expectedException.expectMessage(expectedMessage);
    }
}
