"""
nlt/core.py - Main Nültack engine
"""
import base64
import zlib
import random
import hashlib
from typing import Optional, Dict, Any

class Nültack:
    def __init__(self, version: int = 1):
        self.version = version
        self._magic = b'NLTK'
        self._salt = hashlib.sha256(b'S4tY4_Et3rn4lS').digest()[:16]
        
    def _generate_pad(self, length: int = 16) -> bytes:
        """Generate random XOR pad"""
        return bytes([random.randint(0, 255) for _ in range(length)])
    
    def _apply_xor(self, data: bytes, key: bytes) -> bytes:
        """Apply XOR cipher with rolling key"""
        return bytes([b ^ key[i % len(key)] for i, b in enumerate(data)])
    
    def _validate_python(self, code: str) -> bool:
        """Validate Python syntax"""
        try:
            compile(code, '<nlt_validation>', 'exec')
            return True
        except SyntaxError:
            return False
