from datetime import datetime, timedelta
from typing import Any, Optional, Union

from jose import jwt
from passlib.context import CryptContext

from app.core.config import settings

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")


def create_access_token(
    subject: Union[str, Any], expires_delta: Optional[timedelta] = None,
) -> str:
    """
    Create a JWT access token.
    """
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(
            minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES,
        )
    to_encode = {"exp": expire, "sub": str(subject)}
    encoded_jwt = jwt.encode(
        to_encode, settings.JWT_SECRET_KEY, algorithm=settings.JWT_ALGORITHM,
    )
    return encoded_jwt


def verify_password(plain_password: str, hashed_password: str) -> bool:
    """
    Verify a password against a hash.
    """
    return pwd_context.verify(plain_password, hashed_password)


def get_password_hash(password: str) -> str:
    """
    Generate a hash for a password.
    """
    return pwd_context.hash(password)