package com.example.flow_free;

import android.content.Context;
import android.content.res.AssetManager;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;

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

public class PuzzleParser {

    public static Puzzle parsePuzzle(Context context, String filename) {
        AssetManager assetManager = context.getAssets();
        try {
            InputStream inputStream = assetManager.open("puzzles/" + filename);
            XmlPullParser parser = XmlPullParserFactory.newInstance().newPullParser();
            parser.setInput(inputStream, "UTF-8");

            int size = -1;
            String name = filename.replace(".xml", "");
            List<int[]> pairs = new ArrayList<>();
            int[] currentPair = new int[4];
            int pointIndex = 0;

            int currentColorId=0; //test pour coleur

            int eventType = parser.getEventType();
            while (eventType != XmlPullParser.END_DOCUMENT) {
                if (eventType == XmlPullParser.START_TAG) {
                    String tagName = parser.getName();
                    if (tagName.equals("puzzle")) {
                        size = Integer.parseInt(parser.getAttributeValue(null, "size"));
                        if (parser.getAttributeValue(null, "nom") != null) {
                            name = parser.getAttributeValue(null, "nom");
                        }
                    } else if (tagName.equals("point")) {
                        int col = Integer.parseInt(parser.getAttributeValue(null, "colonne"));
                        int row = Integer.parseInt(parser.getAttributeValue(null, "ligne"));
                        currentPair[pointIndex * 2] = col;
                        currentPair[pointIndex * 2 + 1] = row;
                        pointIndex++;
                        if (pointIndex == 2) {
                            pairs.add(new int[]{currentPair[0], currentPair[1], currentPair[2], currentPair[3]});

                            currentColorId++;
                            currentPair = new int[4];
                            pointIndex = 0;
                        }
                    }
                }
                eventType = parser.next();
            }

            return new Puzzle(size, name, pairs);
        } catch (IOException | XmlPullParserException | NumberFormatException e) {
            e.printStackTrace();
            return null;
        }
    }
}