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 * The Universal Permissive License (UPL), Version 1.0
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 * unmodified Software as contributed to or provided by such licensor, or (ii)
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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.
 *
 * This license is subject to the following condition:
 *
 * 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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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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package com.oracle.graal.python.builtins.objects.cext.capi;

import static com.oracle.graal.python.builtins.objects.cext.capi.NativeMember.SQ_CONCAT;
import static com.oracle.graal.python.builtins.objects.cext.capi.NativeMember.SQ_ITEM;
import static com.oracle.graal.python.builtins.objects.cext.capi.NativeMember.SQ_LENGTH;
import static com.oracle.graal.python.builtins.objects.cext.capi.NativeMember.SQ_REPEAT;
import static com.oracle.graal.python.nodes.SpecialMethodNames.T___ADD__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.T___GETITEM__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.T___LEN__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.T___MUL__;

import com.oracle.graal.python.builtins.objects.cext.capi.CExtNodes.ToSulongNode;
import com.oracle.graal.python.builtins.objects.cext.capi.CExtNodes.TransformExceptionToNativeNode;
import com.oracle.graal.python.builtins.objects.type.PythonManagedClass;
import com.oracle.graal.python.nodes.SpecialMethodNames;
import com.oracle.graal.python.nodes.attributes.LookupAttributeInMRONode;
import com.oracle.graal.python.runtime.GilNode;
import com.oracle.graal.python.runtime.PythonContext;
import com.oracle.graal.python.runtime.exception.PException;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Cached.Exclusive;
import com.oracle.truffle.api.dsl.ImportStatic;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.UnknownIdentifierException;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.library.CachedLibrary;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
import com.oracle.truffle.api.profiles.BranchProfile;
import com.oracle.truffle.llvm.spi.NativeTypeLibrary;

/**
 * Wraps a PythonObject to provide a native view with a shape like {@code PySequenceMethods}.
 */
@ExportLibrary(InteropLibrary.class)
@ExportLibrary(value = NativeTypeLibrary.class, useForAOT = false)
@ImportStatic(SpecialMethodNames.class)
public class PySequenceMethodsWrapper extends PythonNativeWrapper {

    public PySequenceMethodsWrapper(PythonManagedClass delegate) {
        super(delegate);
    }

    public PythonManagedClass getPythonClass(PythonNativeWrapperLibrary lib) {
        return (PythonManagedClass) lib.getDelegate(this);
    }

    @ExportMessage
    protected boolean hasMembers() {
        return true;
    }

    @ExportMessage
    protected boolean isMemberReadable(String member) {
        return SQ_REPEAT.getMemberNameJavaString().equals(member) || SQ_ITEM.getMemberNameJavaString().equals(member) || SQ_CONCAT.getMemberNameJavaString().equals(member) ||
                        SQ_LENGTH.getMemberNameJavaString().equals(member);
    }

    @ExportMessage
    protected Object getMembers(@SuppressWarnings("unused") boolean includeInternal) throws UnsupportedMessageException {
        throw UnsupportedMessageException.create();
    }

    @ExportMessage
    protected Object readMember(String member,
                    @CachedLibrary("this") PythonNativeWrapperLibrary lib,
                    @Cached LookupAttributeInMRONode.Dynamic lookup,
                    @Cached ToSulongNode toSulongNode,
                    @Cached BranchProfile errorProfile,
                    @Cached TransformExceptionToNativeNode transformExceptionToNativeNode,
                    @Exclusive @Cached GilNode gil) throws UnknownIdentifierException {
        boolean mustRelease = gil.acquire();
        try {
            Object result;
            try {
                if (SQ_REPEAT.getMemberNameJavaString().equals(member)) {
                    result = toSulongNode.execute(lookup.execute(getPythonClass(lib), T___MUL__));
                } else if (SQ_ITEM.getMemberNameJavaString().equals(member)) {
                    return PyProcsWrapper.createSsizeargfuncWrapper(lookup.execute(getPythonClass(lib), T___GETITEM__), true);
                } else if (SQ_CONCAT.getMemberNameJavaString().equals(member)) {
                    result = toSulongNode.execute(lookup.execute(getPythonClass(lib), T___ADD__));
                } else if (SQ_LENGTH.getMemberNameJavaString().equals(member)) {
                    result = PyProcsWrapper.createLenfuncWrapper(lookup.execute(getPythonClass(lib), T___LEN__));
                } else {
                    // TODO extend list
                    throw UnknownIdentifierException.create(member);
                }
            } catch (PException e) {
                errorProfile.enter();
                transformExceptionToNativeNode.execute(null, e);
                result = PythonContext.get(gil).getNativeNull();
            }
            return result;
        } finally {
            gil.release(mustRelease);
        }
    }

    @ExportMessage
    @SuppressWarnings("static-method")
    protected boolean hasNativeType() {
        // TODO implement native type
        return false;
    }

    @ExportMessage
    @SuppressWarnings("static-method")
    public Object getNativeType() {
        // TODO implement native type
        return null;
    }

}
