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package com.oracle.graal.python.builtins.objects.tuple;

import static com.oracle.graal.python.nodes.ErrorMessages.CANT_DELETE_ATTRIBUTE;
import static com.oracle.graal.python.nodes.ErrorMessages.CANT_SET_ATTRIBUTE;
import static com.oracle.graal.python.nodes.ErrorMessages.DESC_FOR_INDEX_S_FOR_S_DOESNT_APPLY_TO_P;
import static com.oracle.graal.python.nodes.ErrorMessages.TUPLE_OUT_OF_BOUNDS;
import static com.oracle.graal.python.nodes.SpecialAttributeNames.__DOC__;
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.__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.PNone;
import com.oracle.graal.python.lib.PyObjectSizeNode;
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.nodes.object.GetClassNode;
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;

@CoreFunctions(extendClasses = PythonBuiltinClassType.PTupleGetter)
public final class TupleGetterBuiltins extends PythonBuiltins {
    @Override
    protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
        return TupleGetterBuiltinsFactory.getFactories();
    }

    @Builtin(name = __REDUCE__, minNumOfPositionalArgs = 1)
    @GenerateNodeFactory
    public abstract static class ReduceNode extends PythonUnaryBuiltinNode {
        @Specialization
        Object reduce(PTupleGetter self,
                        @Cached GetClassNode getClassNode) {
            PTuple args = factory().createTuple(new Object[]{self.getIndex(), self.getDoc()});
            return factory().createTuple(new Object[]{getClassNode.execute(self), args});
        }
    }

    @Builtin(name = __GET__, minNumOfPositionalArgs = 2, maxNumOfPositionalArgs = 3)
    @GenerateNodeFactory
    abstract static class TupleGetterGetNode extends PythonTernaryBuiltinNode {
        @Specialization()
        Object getTuple(VirtualFrame frame, PTupleGetter self, PTuple instance, @SuppressWarnings("unused") Object owner,
                        @Cached PyObjectSizeNode sizeNode,
                        @Cached TupleBuiltins.GetItemNode getItemNode) {
            final int index = self.getIndex();
            if (index >= sizeNode.execute(frame, instance)) {
                throw raise(PythonBuiltinClassType.IndexError, TUPLE_OUT_OF_BOUNDS);
            }

            return getItemNode.execute(frame, instance, index);
        }

        @Specialization
        Object getNone(@SuppressWarnings("unused") VirtualFrame frame, PTupleGetter self, @SuppressWarnings("unused") PNone instance, @SuppressWarnings("unused") Object owner) {
            return self;
        }

        @Specialization(guards = {"!isPTuple(instance)", "!isNone(instance)"})
        Object getOthers(@SuppressWarnings("unused") VirtualFrame frame, PTupleGetter self, Object instance, @SuppressWarnings("unused") Object owner) {
            final int index = self.getIndex();
            throw raise(PythonBuiltinClassType.TypeError, DESC_FOR_INDEX_S_FOR_S_DOESNT_APPLY_TO_P,
                            index, "tuple subclasses", instance);
        }
    }

    @Builtin(name = __SET__, minNumOfPositionalArgs = 3)
    @GenerateNodeFactory
    abstract static class TupleGetterSetNode extends PythonTernaryBuiltinNode {
        @Specialization
        @SuppressWarnings("unused")
        Object set(PTupleGetter self, Object instance, Object value) {
            throw raise(PythonBuiltinClassType.AttributeError, CANT_SET_ATTRIBUTE);
        }
    }

    @Builtin(name = __DELETE__, minNumOfPositionalArgs = 2)
    @GenerateNodeFactory
    abstract static class TupleGetterDeleteNode extends PythonBinaryBuiltinNode {
        @Specialization
        @SuppressWarnings("unused")
        Object delete(PTupleGetter self, Object instance) {
            throw raise(PythonBuiltinClassType.AttributeError, CANT_DELETE_ATTRIBUTE);
        }
    }

    @Builtin(name = __DOC__, minNumOfPositionalArgs = 1, maxNumOfPositionalArgs = 2, isGetter = true, isSetter = true)
    @GenerateNodeFactory
    abstract static class TupleGetterDocNode extends PythonBinaryBuiltinNode {
        @Specialization(guards = "!isNoValue(value)")
        Object set(PTupleGetter self, Object value) {
            self.setDoc(value);
            return PNone.NONE;
        }

        @Specialization(guards = "isNoValue(value)")
        Object get(PTupleGetter self, @SuppressWarnings("unused") PNone value) {
            return self.getDoc();
        }
    }
}
