/*
 * Copyright 2017 NAVER Corp.
 *
 * 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.navercorp.pinpoint.profiler.context.id;

import com.google.inject.Inject;
import com.navercorp.pinpoint.bootstrap.context.TraceId;
import com.navercorp.pinpoint.common.util.TransactionId;
import com.navercorp.pinpoint.common.util.TransactionIdUtils;
import com.navercorp.pinpoint.profiler.context.module.AgentId;
import com.navercorp.pinpoint.profiler.context.module.AgentStartTime;

/**
 * @author Woonduk Kang(emeroad)
 */
public class DefaultTraceIdFactory implements TraceIdFactory {

    private final String agentId;
    private final long agentStartTime;
    private final IdGenerator idGenerator;

    @Inject
    public DefaultTraceIdFactory(@AgentId String agentId, @AgentStartTime long agentStartTime, IdGenerator idGenerator) {
        if (agentId == null) {
            throw new NullPointerException("agentId must not be null");
        }
        if (idGenerator == null) {
            throw new NullPointerException("idGenerator must not be null");
        }
        this.agentId = agentId;
        this.agentStartTime = agentStartTime;
        this.idGenerator = idGenerator;
    }

    @Override
    public TraceId newTraceId() {
        final long localTransactionId = idGenerator.nextTransactionId();
        final TraceId traceId = new DefaultTraceId(agentId, agentStartTime, localTransactionId);
        return traceId;
    }

    public TraceId parse(String transactionId, long parentSpanId, long spanId, short flags) {
        if (transactionId == null) {
            throw new NullPointerException("transactionId must not be null");
        }
        final TransactionId parseId = TransactionIdUtils.parseTransactionId(transactionId);
        return new DefaultTraceId(parseId.getAgentId(), parseId.getAgentStartTime(), parseId.getTransactionSequence(), parentSpanId, spanId, flags);
    }
}