# modules/crypto_engine.py

import hashlib
import secrets
from typing import Dict, Any


class CryptoEngine:

    def __init__(self):

        print("CryptoEngine geladen")

        self.algorithm = "sha256"

    def hash_text(self, text: str) -> str:

        return hashlib.sha256(
            text.encode("utf-8")
        ).hexdigest()

    def generate_token(
        self,
        length: int = 32
    ) -> str:

        return secrets.token_hex(length)

    def verify_hash(
        self,
        text: str,
        hashed: str
    ) -> bool:

        new_hash = self.hash_text(text)

        return new_hash == hashed

    def secure_payload(
        self,
        payload: Dict[str, Any]
    ) -> Dict[str, Any]:

        payload_string = str(payload)

        payload_hash = self.hash_text(payload_string)

        return {
            "payload": payload,
            "hash": payload_hash,
            "algorithm": self.algorithm
        }

    def create_session_key(self) -> str:

        return secrets.token_urlsafe(64)