package com.github.catvod.utils;

import android.graphics.Bitmap;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;

import java.util.EnumMap;
import java.util.Map;

public class QRCode {

    private static final int WHITE = 0xFFFFFFFF;
    private static final int BLACK = 0xFF000000;

    public static Bitmap createBitmap(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        int[] pixels = new int[width * height];
        for (int y = 0; y < height; y++) {
            int offset = y * width;
            for (int x = 0; x < width; x++) {
                pixels[offset + x] = matrix.get(x, y) ? BLACK : WHITE;
            }
        }
        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return bitmap;
    }

    public static Bitmap getBitmap(String contents, int size, int margin) {
        try {
            Map<EncodeHintType, Object> hints = new EnumMap<>(EncodeHintType.class);
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            hints.put(EncodeHintType.MARGIN, margin);
            return createBitmap(new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, size, size, hints));
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}