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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
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 * without restriction, including without limitation the rights to copy, create
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
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 * This license is subject to the following condition:
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 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
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package com.oracle.graal.python.builtins.objects.getsetdescriptor;

import static com.oracle.graal.python.nodes.SpecialMethodNames.__DELETE__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.__GET__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.__REDUCE__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.__REPR__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.__SET__;

import java.util.List;

import com.oracle.graal.python.builtins.Builtin;
import com.oracle.graal.python.builtins.CoreFunctions;
import com.oracle.graal.python.builtins.PythonBuiltinClassType;
import com.oracle.graal.python.builtins.PythonBuiltins;
import com.oracle.graal.python.builtins.objects.getsetdescriptor.DescriptorBuiltins.DescrDeleteNode;
import com.oracle.graal.python.builtins.objects.getsetdescriptor.DescriptorBuiltins.DescrGetNode;
import com.oracle.graal.python.builtins.objects.getsetdescriptor.DescriptorBuiltins.DescrSetNode;
import com.oracle.graal.python.builtins.objects.getsetdescriptor.DescriptorBuiltins.DescriptorCheckNode;
import com.oracle.graal.python.builtins.objects.object.ObjectNodes.GetIdNode;
import com.oracle.graal.python.builtins.objects.type.TypeNodes;
import com.oracle.graal.python.nodes.BuiltinNames;
import com.oracle.graal.python.nodes.attributes.ReadAttributeFromObjectNode;
import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
import com.oracle.graal.python.nodes.function.builtins.PythonBinaryBuiltinNode;
import com.oracle.graal.python.nodes.function.builtins.PythonTernaryBuiltinNode;
import com.oracle.graal.python.nodes.function.builtins.PythonUnaryBuiltinNode;
import com.oracle.graal.python.util.PythonUtils;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.GenerateNodeFactory;
import com.oracle.truffle.api.dsl.NodeFactory;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;

/**
 * Built-in functions that are only used for {@link PythonBuiltinClassType#MemberDescriptor}.
 */
@CoreFunctions(extendClasses = PythonBuiltinClassType.MemberDescriptor)
public class MemberDescriptorBuiltins extends PythonBuiltins {
    @Override
    protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
        return MemberDescriptorBuiltinsFactory.getFactories();
    }

    @Builtin(name = __REPR__, minNumOfPositionalArgs = 1)
    @GenerateNodeFactory
    abstract static class MemberDescriptorReprNode extends PythonUnaryBuiltinNode {
        @Specialization
        static Object repr(GetSetDescriptor descr,
                        @Cached TypeNodes.GetNameNode getName) {
            return PythonUtils.format("<member '%s' of '%s' objects>", descr.getName(), getName.execute(descr.getType()));
        }
    }

    @Builtin(name = __REDUCE__, minNumOfPositionalArgs = 1)
    @GenerateNodeFactory
    abstract static class MemberDescriptorReduceNode extends PythonUnaryBuiltinNode {
        @Specialization
        Object doGeneric(GetSetDescriptor descr,
                        @Cached ReadAttributeFromObjectNode readAttributeFromObjectNode,
                        @Cached GetIdNode getIdNode) {
            Object getattr = readAttributeFromObjectNode.execute(getContext().getBuiltins(), BuiltinNames.GETATTR);
            Object id = getIdNode.execute(getattr);
            return factory().createTuple(new Object[]{id, factory().createTuple(new Object[]{descr.getType(), descr.getName()})});
        }
    }

    @Builtin(name = __GET__, minNumOfPositionalArgs = 2, maxNumOfPositionalArgs = 3)
    @GenerateNodeFactory
    abstract static class MemberGetNode extends PythonTernaryBuiltinNode {
        // https://github.com/python/cpython/blob/e8b19656396381407ad91473af5da8b0d4346e88/Objects/descrobject.c#L149
        @Specialization
        static Object doGetSetDescriptor(VirtualFrame frame, GetSetDescriptor descr, Object obj, @SuppressWarnings("unused") Object type,
                        @Cached DescriptorCheckNode descriptorCheckNode,
                        @Cached DescrGetNode getNode) {
            if (descriptorCheckNode.execute(descr.getType(), descr.getName(), obj)) {
                return descr;
            }
            // TODO(fa): READ_RESTRICTED (see descrobject.c: member_get)
            return getNode.execute(frame, descr, obj);
        }
    }

    @Builtin(name = __SET__, minNumOfPositionalArgs = 3)
    @GenerateNodeFactory
    abstract static class MemberSetNode extends PythonTernaryBuiltinNode {
        @Specialization
        static Object doGetSetDescriptor(VirtualFrame frame, GetSetDescriptor descr, Object obj, Object value,
                        @Cached DescriptorCheckNode descriptorCheckNode,
                        @Cached DescrSetNode setNode) {
            if (descriptorCheckNode.execute(descr.getType(), descr.getName(), obj)) {
                return descr;
            }
            return setNode.execute(frame, descr, obj, value);
        }
    }

    @Builtin(name = __DELETE__, minNumOfPositionalArgs = 2)
    @GenerateNodeFactory
    abstract static class GetSetDeleteNode extends PythonBinaryBuiltinNode {
        @Specialization
        static Object doGetSetDescriptor(VirtualFrame frame, GetSetDescriptor descr, Object obj,
                        @Cached DescriptorCheckNode descriptorCheckNode,
                        @Cached DescrDeleteNode deleteNode) {
            if (descriptorCheckNode.execute(descr.getType(), descr.getName(), obj)) {
                return descr;
            }
            return deleteNode.execute(frame, descr, obj);
        }
    }
}
