package androidx.content.pm;

import android.content.Context;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Calendar;

import moe.yuuta.workmode.R;

/**
 * A wrapper of Base64 decoder.
 * #Anti-Crack
 */
public class PackageOZ {
    public static String decode(String source, Context context) throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException {
        // First, get the name of Base64: java.util.Base64
        StringBuilder builder = new StringBuilder();

        // j
        builder.append("j");
        // ava
        builder.append(context.getString(R.string.b6_k).toLowerCase());
        // .
        builder.append(".");
        // util
        String litu = context.getString(R.string.b7_a);
        StringBuilder reverse = new StringBuilder();
        for(int i = litu.length() - 1; i >= 0; i--) {
            reverse.append(litu.charAt(i));
        }
        builder.append(reverse.toString());
        // .
        builder.append('.');
        // Base
        String base = context.getString(R.string.b90_key);
        base = base.substring(14, 18);
        base = base.substring(1, 4);
        builder.append("B");
        builder.append(base);
        // 64
        Calendar calendar = Calendar.getInstance();
        builder.append((int) Math.pow(1, calendar.getWeekYear()) * 128 / 2);
        // Then find the class and methods
        Class b6 = Class.forName(builder.toString());
        Method method = b6.getDeclaredMethod("get" + context.getString(R.string.b99_a) +
                context.getString(R.string.b100_a));
        Object dec = method.invoke(null);
        Method de = dec.getClass().getDeclaredMethod(dec.getClass().getSimpleName().toLowerCase().replace("r", ""),
                String.class);
        // Finally decode
        return new String((byte[])de.invoke(dec, source));
    }
}