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package fi.evolver.basics.spring.messaging;

import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.util.Collections;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import fi.evolver.basics.spring.messaging.model.PendingTarget;
import fi.evolver.basics.spring.status.model.ComponentStatus;
import fi.evolver.basics.spring.status.model.Reportable;


@Component
public class MessageSenderTask implements Reportable {
	private static final Logger LOG = LoggerFactory.getLogger(MessageSenderTask.class);

	private final MessageRepository messageRepository;
	private final IMessageSender messageSender;

	private LocalDateTime lastRun;


	@Autowired
	public MessageSenderTask(MessageRepository messageRepository, IMessageSender messageSender) {
		this.messageRepository = messageRepository;
		this.messageSender = messageSender;
	}


    @Scheduled(fixedDelay = 10_000)
	public void sendPendingMessages() {
    	try {
	    	lastRun = LocalDateTime.now();
	    	List targets = messageRepository.findTargetsWithPendingMessages();
	    	for (PendingTarget target: targets)
	    		messageSender.sendPendingMessages(target.getMessageTargetConfigId(), target.getMessageGroupId());
    	}
    	catch (Exception e) {
    		LOG.error("Issues scheduling message sending", e);
    	}
	}


	@Override
	public List getStatus() {
		return Collections.singletonList(new ComponentStatus(
				"Bean",
				getClass().getSimpleName(),
				Collections.singletonMap("LastRunMsAgo", ChronoUnit.MILLIS.between(lastRun, LocalDateTime.now()))));
	}

}