package eu.dnetlib.dnetexploremetrics.dao;

import eu.dnetlib.dnetexploremetrics.model.Metrics;
import eu.dnetlib.dnetexploremetrics.utils.PrometheusMetricsFormatter;
import org.apache.commons.io.IOUtils;
import org.apache.log4j.Logger;

import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;

public class MetricsFileDAO implements MetricsDAO {

    private final Logger logger = Logger.getLogger(this.getClass());
    private String fileName;

    @Override
    public void save(Metrics metrics) {
        try {
            Files.write(Paths.get("fileName"), PrometheusMetricsFormatter.formatMetrics(metrics).getBytes());

            ClassLoader classLoader = getClass().getClassLoader();
            File file = new File(classLoader.getResource(".").getFile() +"/metrics.txt");

            FileWriter fileWriter = new FileWriter(file);
            PrintWriter printWriter = new PrintWriter(fileWriter);
            printWriter.print(PrometheusMetricsFormatter.formatMetrics(metrics));
            printWriter.close();

        } catch (IOException ioe) {
            logger.error("Error writing metrics to file " + fileName + ".", ioe);
        }

    }

    @Override
    public String getMetrics() {

        String metrics="";
        try {
            FileInputStream inputStream = new FileInputStream(getClass().getClassLoader().getResource(".").getFile() +"/metrics.txt");
            metrics = IOUtils.toString(inputStream, "UTF-8");
            // do something with everything string
        } catch (IOException ioe) {
            logger.error("Error reading metrics to file " + fileName + ".", ioe);
        }

        return metrics;
    }
}