package com.ghoststeam.kbsurate;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class pointsFragment extends Fragment {
    private RecyclerView cardList;
    private Runnable getInfoFrom;
    private Thread studInfo;
    private Handler setMyAdapter;
    private List<Bundle> bundles = new ArrayList<>();
    private int size;
    private String link;
    private static final int TIMEOUT = 200000;
    private static final String userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36";
    private boolean generated = false;

    public pointsFragment (String link)
    {
        this.link = link;
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
            View pointsView = inflater.inflate(R.layout.points_fragment, container, false);
        if (!generated) {
            cardList = pointsView.findViewById(R.id.cardlist_view);
            cardList.setLayoutManager(new LinearLayoutManager(getActivity()));
            cardList.setHasFixedSize(true);

            setMyAdapter = new Handler() {
                public void handleMessage(Message msg) {
                    cardsAdapter card = new cardsAdapter(size);
                    card.getBundlesFrom(bundles);
                    cardList.setAdapter(card);
                }
            };


            getInfoFrom = new Runnable() {
                @Override
                public void run() {
                    getInfoFromServer(link);
                }
            };

            studInfo = new Thread(getInfoFrom);
            studInfo.start();

        }
        return pointsView;
    }

    private void getInfoFromServer(String link) {
            Bundle bundle = new Bundle();
            Document doc = null;
            try {
                doc = Jsoup.connect(link).timeout(TIMEOUT).userAgent(userAgent).get();
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (doc == null) {
                return;
            }
            Elements mainTable = doc.select("table");
            Elements mainRows = mainTable.select("tr");
            Elements mainCols = mainRows.select("td");
            Element subTable = mainCols.select("table").first();
            Elements rows = subTable.select("tr");
            size = rows.size() - 2;
            for (int i = 2; i < rows.size(); i++) {
                ArrayList<String> firstPoint = new ArrayList<>();
                ArrayList<String> secondPoint = new ArrayList<>();
                ArrayList<String> thirdPoint = new ArrayList<>();
                Element row = rows.get(i);
                Elements cols = row.select("td");
                cols.get(1).select("b");
                String exam = cols.get(1).select("b").text();
                bundle.putString("Examination", exam);
                cols.get(1).select("b").remove();
                bundle.putString("Subject", cols.get(1).text());
                bundle.putString("Value", cols.get(21).text());
                for (int j = 3; j < 7; j++)
                    firstPoint.add(cols.get(j).text());
                for (int k = 8; k < 12; k++)
                    secondPoint.add(cols.get(k).text());
                for (int l = 13; l < 17; l++)
                    thirdPoint.add(cols.get(l).text());
                bundle.putStringArrayList("First point", firstPoint);
                bundle.putStringArrayList("Second point", secondPoint);
                bundle.putStringArrayList("Third point", thirdPoint);
                bundles.add(new Bundle(bundle));
            }
            generated = !generated;
            setMyAdapter.sendEmptyMessage(1);
        }
}