/*
 * Copyright 2023 RisingWave Labs
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.risingwave.connector;

import com.risingwave.java.binding.Binding;
import com.risingwave.proto.ConnectorServiceProto;
import io.grpc.Status;
import io.grpc.stub.StreamObserver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class JniSinkWriterResponseObserver
        implements StreamObserver<ConnectorServiceProto.SinkWriterStreamResponse> {
    private static final Logger LOG = LoggerFactory.getLogger(JniSinkWriterResponseObserver.class);
    private long responseTxPtr;

    private boolean success = true;

    public JniSinkWriterResponseObserver(long responseTxPtr) {
        this.responseTxPtr = responseTxPtr;
    }

    @Override
    public void onNext(ConnectorServiceProto.SinkWriterStreamResponse response) {
        if (!Binding.sendSinkWriterResponseToChannel(this.responseTxPtr, response.toByteArray())) {
            throw Status.INTERNAL.withDescription("unable to send response").asRuntimeException();
        }
    }

    @Override
    public void onError(Throwable throwable) {
        LOG.error("JniSinkWriterHandler onError: ", throwable);
        var errMsg = throwable.getMessage() == null ? "unknown error" : throwable.getMessage();
        if (!Binding.sendSinkWriterErrorToChannel(this.responseTxPtr, errMsg)) {
            LOG.warn("unable to send error: {}", throwable.getMessage());
        }
        this.success = false;
    }

    @Override
    public void onCompleted() {
        LOG.debug("JniSinkWriterHandler onCompleted");
    }

    public boolean isSuccess() {
        return success;
    }
}
