package de.ph87.data.easyEsp;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import de.ph87.data.mqtt.MqttEvent;
import de.ph87.data.series.measure.MeasureEvent;
import lombok.NonNull;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.event.EventListener;
import org.springframework.stereotype.Service;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

@Slf4j
@Service
@RequiredArgsConstructor
public class EasyEspReceiver {

  private static final Pattern REGEX = Pattern.compile("^(?<room>[^/]+)/sensor/(?<property>[^/]+)$");

  private final ApplicationEventPublisher applicationEventPublisher;

  private final ObjectMapper objectMapper;

  @EventListener(MqttEvent.class)
  public void onEvent(@NonNull final MqttEvent event) {
    final Matcher matcher = REGEX.matcher(event.topic);
    if (!matcher.find()) {
      return;
    }

    final EasyEspInbound inbound;
    try {
      inbound = objectMapper.readValue(event.payload, EasyEspInbound.class);
    } catch (JsonProcessingException e) {
      log.error("Failed to parse EasyEspInbound: error={}, event={}", e, event);
      return;
    }

    final String room = matcher.group("room");
    final String property = matcher.group("property");
    final String name = "%s.%s".formatted(room, property);
    applicationEventPublisher.publishEvent(new MeasureEvent(name, inbound.unit, inbound.date, inbound.value));
  }

}