package de.jeyp91.apifootball;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.HashSet;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import de.jeyp91.ResourceProvider;
import de.jeyp91.S3Provider;

public class APIFootballUpdater {

    private static final Logger logger = LoggerFactory.getLogger(APIFootballUpdater.class);
    private static final String BASE_URL = "https://v3.football.api-sports.io/";

    public APIFootballUpdater() {

    }

    public void updateFixtures(int season, int league) {
        String requestPath = "fixtures";
        S3Provider prov = new S3Provider();
        try {
            String content = getRawData(requestPath, season, league);
            prov.writeFixturesToS3(season, league, content);
        } catch (Exception e) {
            if(e.getMessage().toLowerCase().contains("rate limit'")) {
                try {
                    Thread.sleep(1000 * 60);
                    String content = getRawData(requestPath, season, league);
                    prov.writeFixturesToS3(season, league, content);
                } catch (InterruptedException interruptedException) {
                    interruptedException.printStackTrace();
                } catch (Exception exception) {
                    logger.error(e.getMessage());
                }
            } else {
                logger.error(e.getMessage());
            }
        }
    }

    public void updateAllFixtures(int season) {
        HashSet<Integer> leagues = getLeagues();
        for (Integer league : leagues) {
            updateFixtures(season, league);
            try {
                Thread.sleep(1000*6);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
    }

    public void updateAllRounds(int season) {
        HashSet<Integer> leagues = getLeagues();
        for (Integer league : leagues) {
            updateRounds(season, league);
            try {
                Thread.sleep(1000*6);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
    }

    public void updateRounds(int season, int league) {
        String requestPath = "fixtures/rounds";
        S3Provider prov = new S3Provider();
        try {
            String content = getRawData(requestPath, season, league);
            prov.writeRoundsToS3(season, league, content);
        } catch (Exception e) {
            if(e.getMessage().toLowerCase().contains("rate limit'")) {
                try {
                    Thread.sleep(1000 * 60);
                    String content = getRawData(requestPath, season, league);
                    prov.writeRoundsToS3(season, league, content);
                } catch (InterruptedException interruptedException) {
                    interruptedException.printStackTrace();
                } catch (Exception exception) {
                    logger.error(e.getMessage());
                }
            } else {
                logger.error(e.getMessage());
            }
        }
    }

    public String getRawData(String requestPath, int season, int league) throws Exception {
        if(league != 1 && league != 4) {
            /**
             * Season usually is one higher in Tippliga than in API-Football.
             * e.g. 2023/24 is 2024 in Tippliga and 2023 in API-Football.
             * Because Liga Cup in Tippliga is at the end of a season, season does match World Cup (1) and Euro Championship (4)
             */
            season--;
        }

        HttpClient client = HttpClientBuilder.create().build();
        String requestUrl = BASE_URL + requestPath + "?season=" + (season) + "&league=" + league + "&timezone=Europe/Berlin";
        HttpGet request = new HttpGet(requestUrl);

        // add request header
        request.addHeader("x-rapidapi-host", "v3.football.api-sports.io");
        request.addHeader("x-rapidapi-key", "a607e6a7437d9d52f3ac73e0b2704d0b");

        HttpResponse response = client.execute(request);
        BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
        StringBuilder result = new StringBuilder();
        String line;
        while ((line = rd.readLine()) != null) {
            result.append(line);
        }
        checkErrors(requestUrl, result.toString());
        return result.toString();
    }

    public HashSet<Integer> getLeagues() {
        JSONArray leaguesArray = ResourceProvider.getLigenConfig();
        HashSet<Integer> leagues = new HashSet<>();
        for (Object leagueObject : leaguesArray) {
            JSONObject leagueJSONObject = (JSONObject) leagueObject;
            Integer leagueId = ((Long) leagueJSONObject.get("league_id")).intValue();
            leagues.add(leagueId);
        }
        return leagues;
    }

    public void checkErrors(String requestUrl, String result) throws Exception {
        JSONObject resultObject = stringToJSONObject(result);
        boolean containsError = !((JSONArray) resultObject.get("errors")).isEmpty();
        // int results = Integer.parseInt(resultObject.get("results").toString());
        if(containsError) {
            String errorMessage = resultObject.get("errors").toString();
            throw new Exception(requestUrl + " returned error: '" + errorMessage + "'");
        }
        // else if (results == 0) {
        //     throw new Exception(requestUrl + " did not have any results.");
        // }
    }

    private JSONObject stringToJSONObject(String rawData) {

        JSONParser parser = new JSONParser();
        JSONObject data = null;
        try {
            data = (JSONObject) parser.parse(rawData);
        } catch (Exception e) {
            /* TODO */
            e.printStackTrace();
        }
        return data;
    }
}