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/**
 *
 *  @author Grzegorczyk Jakub S20813
 *
 */


package zad2;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.annotation.*;
import com.sun.media.jfxmediaimpl.HostUtils;


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import java.util.HashMap;
import java.util.*;
import java.util.Locale;
import java.util.Map;
import java.util.function.DoubleToIntFunction;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Service {
    Map<String, String> countries = new HashMap<>();
    Map<String, String> currencies = new HashMap<>();

    private String country;
    private String currency;
    private String countryCode;
    private String apiKey = "bc61c0fbfb7db10e88608ab42731a230";

    public Service(String country) {
        this.country = country;
        // Generate the Map with the iso and country name
        for (String iso : Locale.getISOCountries()) {
            Locale l = new Locale("", iso);
            countries.put(l.getDisplayCountry(Locale.ENGLISH), iso);
        }
        countryCode = countries.get(country);
    }

    public String getWeather(String cityWeather){
        String urlFormat = String.format("https://api.openweathermap.org/data/2.5/weather?q=%s,%s&appid=%s",cityWeather, countryCode, apiKey); // Prepare the URL with all needed stuff
        return getStringFromUrl(urlFormat);

    };

    public static String getCurrencyCode(String countryCode) {
        return Currency.getInstance(new Locale("", countryCode)).getCurrencyCode();
    }

    public Double getRateFor(String currency) {
        try {
            String apiKey = "5912e69ce275f1d1b111672201532740";
            String currencyCode = getCurrencyCode(countryCode);
            String currencyFormat = String.format("http://api.exchangeratesapi.io/latest?access_key=%s&symbols=%s,%s",apiKey,currencyCode,currency);
            String stringJson = getStringFromUrl(currencyFormat);

            ObjectMapper objectMapper = new ObjectMapper(); // Create objectMapper
            JsonNode jsonNode = objectMapper.readTree(stringJson); // Get the tree from the String
            JsonNode rates = jsonNode.get("rates"); // Get the rates map from the json object

            double currencyCodeRate = rates.get(currencyCode).asDouble();
            double currencyRate = rates.get(currency).asDouble();
            double result = (double) Math.round(currencyCodeRate / currencyRate * 100000d) / 100000d;
            System.out.println(result);
            return result;

        } catch (IOException e) {
            e.printStackTrace();
        }
        return 0.0;
    }

    public String getStringFromUrl(String urlString){
        try {
            URL url = new URL(urlString);
            HttpURLConnection con = (HttpURLConnection) url.openConnection(); // Create/Open the connection
            con.setRequestMethod("GET"); // Setup the request method

            int status = con.getResponseCode();
            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String inputLine;
            StringBuffer content = new StringBuffer();
            while ((inputLine = in.readLine()) != null) {
                content.append(inputLine);
            }
            in.close();
            return content.toString();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (ProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "";
    }

    public Double getNBPRate() {
        String kursyA = getStringFromUrl("https://www.nbp.pl/kursy/kursya.html").replaceAll("\\s", "_");
        String kursyB = getStringFromUrl("https://www.nbp.pl/kursy/kursyb.html").replaceAll("\\s", "_");

        String pattern = String.format("<td_class=\"right\">.*%s</td>_*<td_class=\"right\">([0-9]*,[0-9]*)</td>", getCurrencyCode(countryCode)); // Regex for getting the Kurs
        Pattern pA = Pattern.compile(pattern);
        Pattern pB = Pattern.compile(pattern);
        
        Matcher mA = pA.matcher(kursyA);
        Matcher mB = pB.matcher(kursyB);

        if( mA.find() ){
            return Double.parseDouble(mA.group(1).replaceAll(",","."));
        }else if ( mB.find() ){
            return Double.parseDouble(mB.group(1).replaceAll(",", "."));
        }else{
            return 0.0;
        }
    }
}