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package com.hazelcast.stabilizer.coordinator;

import com.hazelcast.logging.ILogger;
import com.hazelcast.logging.Logger;
import com.hazelcast.stabilizer.Utils;
import com.hazelcast.stabilizer.coordinator.remoting.AgentsClient;
import com.hazelcast.stabilizer.worker.commands.GetOperationCountCommand;

import java.util.List;

public class PerformanceMonitor extends Thread {
    private final ILogger log = Logger.getLogger(PerformanceMonitor.class);

    private final AgentsClient client;
    private final Coordinator coordinator;
    private long previousCount = 0;
    public long previousTime = System.currentTimeMillis();

    public PerformanceMonitor(Coordinator coordinator) {
        this.client = coordinator.agentsClient;
        this.coordinator = coordinator;
    }

    @Override
    public void run() {
        for (; ; ) {
            Utils.sleepSeconds(10);

            try {
                checkPerformance();
            } catch (Throwable t) {
                log.severe(t);
            }
        }
    }

    private void checkPerformance() {
        GetOperationCountCommand getOperationCountTestCommand = new GetOperationCountCommand();
        List> result = client.executeOnAllWorkers(getOperationCountTestCommand);
        long currentCount = 0;
        for (List list : result) {
            for (Long item : list) {
                if (item != null) {
                    currentCount += item;
                }
            }
        }

        long delta = currentCount - previousCount;
        long currentMs = System.currentTimeMillis();
        long durationMs = currentMs - previousTime;

        coordinator.performance = (delta * 1000d) / durationMs;
        coordinator.operationCount = currentCount;
        previousTime = currentMs;
        previousCount = currentCount;
    }
}