from datetime import datetime, timedelta
from typing import Any, 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: timedelta = None
) -> str:
    """
    Create a new access token for a user.

    Args:
        subject: The subject of the token (typically the user ID)
        expires_delta: Optional expiration time for the token

    Returns:
        The encoded JWT 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.SECRET_KEY, algorithm="HS256")
    return encoded_jwt


def verify_password(plain_password: str, hashed_password: str) -> bool:
    """
    Verify that a plain password matches a hashed password.

    Args:
        plain_password: The plain text password to check
        hashed_password: The hashed password to compare against

    Returns:
        True if the passwords match, False otherwise
    """
    return pwd_context.verify(plain_password, hashed_password)


def get_password_hash(password: str) -> str:
    """
    Hash a password using the configured password context.

    Args:
        password: The plain text password to hash

    Returns:
        The hashed password
    """
    return pwd_context.hash(password)