/*
 * Copyright (c) 2022-2023 nosqlbench
 *
 * 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 io.nosqlbench.adapter.pulsar.dispensers;

import io.nosqlbench.adapter.pulsar.PulsarSpace;
import io.nosqlbench.adapter.pulsar.ops.MessageReaderOp;
import io.nosqlbench.adapter.pulsar.util.PulsarAdapterUtil;
import io.nosqlbench.adapters.api.activityimpl.uniform.DriverAdapter;
import io.nosqlbench.adapters.api.templating.ParsedOp;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.pulsar.client.api.Reader;

import java.util.function.LongFunction;

public class MessageReaderOpDispenser extends PulsarClientOpDispenser {

    private final static Logger logger = LogManager.getLogger("MessageReaderOpDispenser");

    private final LongFunction<String> cycleReaderNameFunc;
    private final LongFunction<String> msgStartPosStrFunc;
    private final LongFunction<Reader> readerFunc;

    public MessageReaderOpDispenser(DriverAdapter adapter,
                                    ParsedOp op,
                                    LongFunction<String> tgtNameFunc,
                                    PulsarSpace pulsarSpace) {
        super(adapter, op, tgtNameFunc, pulsarSpace);

        this.cycleReaderNameFunc =
            lookupMandtoryStrOpValueFunc(PulsarAdapterUtil.READER_CONF_STD_KEY.readerName.label);
        this.msgStartPosStrFunc = lookupOptionalStrOpValueFunc(
            "start_msg_position", PulsarAdapterUtil.READER_MSG_POSITION_TYPE.earliest.label);
        this.readerFunc = (l) -> getReader(
            tgtNameFunc.apply(l),
            cycleReaderNameFunc.apply(l),
            msgStartPosStrFunc.apply(l));
    }

    @Override
    public MessageReaderOp getOp(long cycle) {

        return new MessageReaderOp(
            pulsarAdapterMetrics,
            pulsarClient,
            pulsarSchema,
            asyncApiFunc.apply(cycle),
            readerFunc.apply(cycle));
    }
}
