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package com.oracle.graal.python.builtins.modules.bz2;

import static com.oracle.graal.python.builtins.PythonBuiltinClassType.BZ2Compressor;
import static com.oracle.graal.python.builtins.PythonBuiltinClassType.ValueError;
import static com.oracle.graal.python.builtins.modules.bz2.Bz2Nodes.BZ_OK;
import static com.oracle.graal.python.builtins.modules.bz2.Bz2Nodes.errorHandling;
import static com.oracle.graal.python.nodes.ErrorMessages.COMPRESSLEVEL_MUST_BE_BETWEEN_1_AND_9;
import static com.oracle.graal.python.nodes.ErrorMessages.COMPRESSOR_HAS_BEEN_FLUSHED;
import static com.oracle.graal.python.nodes.ErrorMessages.REPEATED_CALL_TO_FLUSH;
import static com.oracle.graal.python.nodes.SpecialMethodNames.__INIT__;

import java.util.List;

import com.oracle.graal.python.annotations.ArgumentClinic;
import com.oracle.graal.python.annotations.ArgumentClinic.ClinicConversion;
import com.oracle.graal.python.builtins.Builtin;
import com.oracle.graal.python.builtins.CoreFunctions;
import com.oracle.graal.python.builtins.PythonBuiltins;
import com.oracle.graal.python.builtins.objects.PNone;
import com.oracle.graal.python.builtins.objects.bytes.BytesNodes;
import com.oracle.graal.python.builtins.objects.bytes.PBytes;
import com.oracle.graal.python.builtins.objects.bytes.PBytesLike;
import com.oracle.graal.python.builtins.objects.common.SequenceStorageNodes;
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.PythonBinaryClinicBuiltinNode;
import com.oracle.graal.python.nodes.function.builtins.PythonUnaryBuiltinNode;
import com.oracle.graal.python.nodes.function.builtins.clinic.ArgumentClinicProvider;
import com.oracle.graal.python.runtime.NFIBz2Support;
import com.oracle.graal.python.runtime.NativeLibrary;
import com.oracle.graal.python.runtime.PythonContext;
import com.oracle.graal.python.runtime.GilNode;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Cached.Shared;
import com.oracle.truffle.api.dsl.Fallback;
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;
import com.oracle.truffle.api.profiles.ConditionProfile;

@CoreFunctions(extendClasses = BZ2Compressor)
public class BZ2CompressorBuiltins extends PythonBuiltins {
    @Override
    protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
        return BZ2CompressorBuiltinsFactory.getFactories();
    }

    @Builtin(name = __INIT__, minNumOfPositionalArgs = 1, parameterNames = {"$self", "compresslevel"})
    @ArgumentClinic(name = "compresslevel", conversion = ClinicConversion.Int, defaultValue = "9", useDefaultForNone = true)
    @GenerateNodeFactory
    public abstract static class InitNode extends PythonBinaryClinicBuiltinNode {

        @Override
        protected ArgumentClinicProvider getArgumentClinic() {
            return BZ2CompressorBuiltinsClinicProviders.InitNodeClinicProviderGen.INSTANCE;
        }

        @Specialization(guards = {"compresslevel >= 1", "compresslevel <= 9"})
        PNone init(BZ2Object.BZ2Compressor self, int compresslevel,
                        @Cached NativeLibrary.InvokeNativeFunction createStream,
                        @Cached NativeLibrary.InvokeNativeFunction compressInit,
                        @Cached ConditionProfile errProfile,
                        @Cached GilNode gil) {
            gil.release(true);
            try {
                NFIBz2Support bz2Support = PythonContext.get(this).getNFIBz2Support();
                Object bzst = bz2Support.createStream(createStream);
                int err = bz2Support.compressInit(bzst, compresslevel, compressInit);
                if (errProfile.profile(err != BZ_OK)) {
                    errorHandling(err, getRaiseNode());
                }
                self.init(bzst, bz2Support);
                return PNone.NONE;
            } finally {
                gil.acquire();
            }
        }

        @SuppressWarnings("unused")
        @Fallback
        Object err(Object self, Object compresslevel) {
            throw raise(ValueError, COMPRESSLEVEL_MUST_BE_BETWEEN_1_AND_9);
        }
    }

    @Builtin(name = "compress", minNumOfPositionalArgs = 2, parameterNames = {"$self", "$data"})
    @GenerateNodeFactory
    abstract static class CompressNode extends PythonBinaryBuiltinNode {

        @Specialization(guards = {"!self.isFlushed()"})
        PBytes doNativeBytes(BZ2Object.BZ2Compressor self, PBytesLike data,
                        @Cached SequenceStorageNodes.GetInternalByteArrayNode toBytes,
                        @Cached SequenceStorageNodes.LenNode lenNode,
                        @Shared("c") @Cached Bz2Nodes.Bz2NativeCompress compress) {
            byte[] bytes = toBytes.execute(data.getSequenceStorage());
            int len = lenNode.execute(data.getSequenceStorage());
            return factory().createBytes(compress.compress(self, PythonContext.get(this), bytes, len));
        }

        @Specialization(guards = {"!self.isFlushed()"})
        PBytes doNativeObject(VirtualFrame frame, BZ2Object.BZ2Compressor self, Object data,
                        @Cached BytesNodes.ToBytesNode toBytes,
                        @Shared("c") @Cached Bz2Nodes.Bz2NativeCompress compress) {
            byte[] bytes = toBytes.execute(frame, data);
            int len = bytes.length;
            return factory().createBytes(compress.compress(self, PythonContext.get(this), bytes, len));
        }

        @SuppressWarnings("unused")
        @Specialization(guards = "self.isFlushed()")
        PNone error(BZ2Object.BZ2Compressor self, Object data) {
            throw raise(ValueError, COMPRESSOR_HAS_BEEN_FLUSHED);
        }
    }

    @Builtin(name = "flush", minNumOfPositionalArgs = 1, parameterNames = {"$self"})
    @GenerateNodeFactory
    abstract static class FlushNode extends PythonUnaryBuiltinNode {

        @Specialization(guards = {"!self.isFlushed()"})
        PBytes doit(BZ2Object.BZ2Compressor self,
                        @Cached Bz2Nodes.Bz2NativeCompress compress) {
            self.setFlushed();
            return factory().createBytes(compress.flush(self, PythonContext.get(this)));
        }

        @SuppressWarnings("unused")
        @Specialization(guards = "self.isFlushed()")
        PNone error(BZ2Object.BZ2Compressor self) {
            throw raise(ValueError, REPEATED_CALL_TO_FLUSH);
        }
    }
}
