private static void unscramble(int scriptID, byte[] data, byte[] scrambledData) throws IOException {
        if (data.length != scrambledData.length) {
            return;
        }
        ByteBuffer buffer = new ByteBuffer(data);
        ByteBuffer scrambled = new ByteBuffer(scrambledData);
        boolean hasSwitches = true; //old OSRS doesnt have switches
        boolean newFormat = true;

        buffer.setPosition(data.length - 2);
        scrambled.setPosition(scrambledData.length - 2);
        int switchBlocksSize = buffer.readUnsignedShort();
        if (scrambled.readUnsignedShort() != switchBlocksSize) {
            return;
        }

        int codeBlockEnd = data.length - switchBlocksSize - 16 - 2;
        buffer.setPosition(codeBlockEnd);
        scrambled.setPosition(codeBlockEnd);

        int codeSize = buffer.readInt();
        if (scrambled.readInt() != codeSize) {
            return;
        }
        int intLocalsCount = buffer.readUnsignedShort();
        if (scrambled.readUnsignedShort() != intLocalsCount) {
            return;
        }
        int stringLocalsCount = buffer.readUnsignedShort();
        if (scrambled.readUnsignedShort() != stringLocalsCount) {
            return;
        }
        int longLocalsCount = buffer.readUnsignedShort();
        if (scrambled.readUnsignedShort() != longLocalsCount) {
            return;
        }
        int intArgsCount = buffer.readUnsignedShort();
        if (scrambled.readUnsignedShort() != intArgsCount) {
            return;
        }
        int stringArgsCount = buffer.readUnsignedShort();
        if (scrambled.readUnsignedShort() != stringArgsCount) {
            return;
        }
        int longArgsCount = buffer.readUnsignedShort();
        if (scrambled.readUnsignedShort() != longArgsCount) {
            return;
        }
        int switchesCount = buffer.readUByte();
        if (scrambled.readUByte() != switchesCount) {
            return;
        }
        Map[] switches = new HashMap[switchesCount];
        for (int i = 0; i < switchesCount; i++) {
            int numCases = buffer.readUnsignedShort();
            if (scrambled.readUnsignedShort() != numCases) {
                return;
            }
            switches[i] = new HashMap<Integer, Integer>(numCases);
            while (numCases-- > 0) {
                switches[i].put(buffer.readInt(), buffer.readInt());
            }
        }
        buffer.setPosition(0);
        scrambled.setPosition(0);
        String scriptName = buffer.readNullString();
        scrambled.readNullString();
        Map<Integer, Integer> s = new HashMap<>();
        Map<Integer, Integer> r = new HashMap<>();
        while (buffer.getPosition() < codeBlockEnd) {
            int opcode = buffer.readUnsignedShort();
            int scrambledOp = scrambled.readUnsignedShort();
            if (opcode == Opcodes.PUSH_STRING) {
                if (!scrambled.readString().equals(buffer.readString())) {
//                   throw new RuntimeException("Script different");
                }
            } else if (opcode == Opcodes.PUSH_LONG) {
                long i = buffer.readLong();
                long j = scrambled.readLong();
                if (i != j) {
                    return;
                }
            } /*else if (opcode == Opcodes.SWITCH) { // switch
                buffer.readInt();
                scrambled.readInt();
            }*/ else if (opcode == Opcodes.RETURN || opcode == Opcodes.POP_INT || opcode == Opcodes.POP_STRING || opcode >= 150) {
                int i = buffer.readUByte();
                int j = scrambled.readUByte();
                if (i != j) {
                    return;
                }
            }/* else if (opcode == Opcodes.GOTO || opcode == Opcodes.INT_NE || opcode == Opcodes.INT_EQ || opcode == Opcodes.INT_LT || opcode == Opcodes.INT_GT || opcode == Opcodes.INT_LE || opcode == Opcodes.INT_GE || opcode == Opcodes.LONG_NE || opcode == Opcodes.LONG_EQ || opcode == Opcodes.LONG_LT || opcode == Opcodes.LONG_GT || opcode == Opcodes.LONG_LE || opcode == Opcodes.LONG_GE || opcode == Opcodes.EQ1 || opcode == Opcodes.EQ0) {
                buffer.readInt();
                scrambled.readInt();
            }*/ else {
                int i = buffer.readInt();
                int j = scrambled.readInt();
                if (i != j) {
                    return;
                }
            }
            s.put(opcode, scrambledOp);
            r.put(scrambledOp, opcode);
//            if (unsure.contains(opcode)) {
//
//            }
//            if (unscrambled.containsKey(opcode)) {
//                if (unscrambled.get(opcode) != scrambledOp) {
//                    System.err.println("Duplicate scrambling found!!!");
//                }
//            } else if (unscrambled.containsValue(scrambledOp)) {
//                System.err.println("Duplicate value " + opcode + " & .. -> " + scrambledOp);
//            } else {
//                unscrambled.put(opcode, scrambledOp);
//            }
        }
        scramble.putAll(s);
        unscramble.putAll(r);
//        System.out.println("Script ok");
    }