package fr.xephi.authme.security.crypts;

import fr.xephi.authme.security.HashUtils;
import fr.xephi.authme.security.MessageDigestAlgorithm;

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;

public class CRAZYCRYPT1 extends UsernameSaltMethod {

    private static final char[] CRYPTCHARS =
        {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

    private static String byteArrayToHexString(final byte... args) {
        final char[] chars = new char[args.length * 2];
        for (int i = 0; i < args.length; i++) {
            chars[i * 2] = CRYPTCHARS[(args[i] >> 4) & 0xF];
            chars[i * 2 + 1] = CRYPTCHARS[(args[i]) & 0xF];
        }
        return new String(chars);
    }

    @Override
    public HashedPassword computeHash(String password, String name) {
        final String text = "ÜÄaeut//&/=I " + password + "7421€547" + name + "__+IÄIH§%NK " + password;
        final MessageDigest md = HashUtils.getDigest(MessageDigestAlgorithm.SHA512);
        md.update(text.getBytes(StandardCharsets.UTF_8), 0, text.length());
        return new HashedPassword(byteArrayToHexString(md.digest()));
    }

}