package app.updates;

import app.entities.server.Server;
import app.services.io.GeoIP;
import app.entities.Stats;
import com.maxmind.geoip2.exception.GeoIp2Exception;
import jakarta.annotation.PostConstruct;
import jakarta.persistence.EntityManager;
import jakarta.persistence.PersistenceContext;
import org.jobrunr.jobs.annotations.Job;
import org.jobrunr.scheduling.JobScheduler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.net.UnknownHostException;
import java.util.Map;

@Component
public class CountriesUpdater {
    Stats stats;
    GeoIP geoIP;
    JobScheduler jobScheduler;
    @PersistenceContext
    EntityManager entityManager;

    @Value("${backend.updates.countries}")
    private boolean update;

    private final String countries_in_current_year = "SELECT DISTINCT `connect_ip` FROM `%s`.`user_connections` WHERE connection_type LIKE 'connect' AND `timestamp` > CAST(DATE_FORMAT(NOW() ,'%%Y-01-01') as DATE) UNION\n";

    @Autowired
    public CountriesUpdater(Stats stats,
                            GeoIP geoIP,
                            JobScheduler jobScheduler) {
        this.stats = stats;
        this.geoIP = geoIP;
        this.jobScheduler = jobScheduler;
    }

    @PostConstruct
    public void UpdateCountries(){
        if (update) {
            jobScheduler.enqueue(() -> UpdateCountriesStatistic());
            jobScheduler.scheduleRecurrently("backend.stats.countries.update", "*/15 * * * *", () -> UpdateCountriesStatistic());
        }
    }

    @Job(name = "Update countries statistic", retries = 0)
    public void UpdateCountriesStatistic() {
        stats.getCountries().clear();

        String query = "";
        for (Map.Entry<String, Server> stringServerEntry : stats.getServers().entrySet()) {
            query += countries_in_current_year.formatted(stringServerEntry.getValue().getDb());
        }
        query = query.substring(0, query.length()-7) + ";";
        for(Object ip:entityManager.createNativeQuery(query).getResultList()) {
            try {
                stats.getCountries().merge(geoIP.GetCountry(String.valueOf(ip)), 1, (x, y) -> x+y);
            } catch (UnknownHostException e) {
            } catch (IOException e) {
            } catch (GeoIp2Exception e) {
            }
        }
    }
}