from datetime import datetime, timedelta, timezone
from typing import Optional, Dict, Any

import bcrypt
from jose import jwt, JWTError

from app.core.config import settings

# --- JELSZÓ KEZELÉS ---

def verify_password(plain_password: str, hashed_password: str) -> bool:
    """
    Összehasonlítja a nyers jelszót a hash-elt változattal.
    """
    try:
        if not hashed_password:
            return False
        return bcrypt.checkpw(
            plain_password.encode("utf-8"),
            hashed_password.encode("utf-8")
        )
    except Exception:
        return False

def get_password_hash(password: str) -> str:
    """
    Biztonságos hash-t generál a jelszóból.
    """
    salt = bcrypt.gensalt()
    return bcrypt.hashpw(password.encode("utf-8"), salt).decode("utf-8")

# --- JWT TOKEN KEZELÉS ---

def create_access_token(data: Dict[str, Any], expires_delta: Optional[timedelta] = None) -> str:
    """
    JWT Access tokent generál a megadott adatokkal és lejárati idővel.
    """
    to_encode = dict(data)
    expire = datetime.now(timezone.utc) + (
        expires_delta or timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
    )
    to_encode.update({"exp": expire})
    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)

def decode_token(token: str) -> Dict[str, Any]:
    """
    Dekódolja a JWT tokent.
    """
    return jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])