"""Security utilities for authentication and authorization."""

from datetime import datetime, timedelta
from typing import Optional, Dict, Any
from jose import JWTError, jwt
from passlib.context import CryptContext

from app.config import settings


# Password hashing context
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")


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

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

    Returns:
        True if password matches, False otherwise
    """
    return pwd_context.verify(plain_password, hashed_password)


def get_password_hash(password: str) -> str:
    """
    Hash a password using bcrypt.

    Args:
        password: The plain text password to hash

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


def create_access_token(
    data: Dict[str, Any],
    expires_delta: Optional[timedelta] = None
) -> str:
    """
    Create a JWT access token.

    Args:
        data: Dictionary containing claims to encode in the token
        expires_delta: Optional expiration time delta

    Returns:
        Encoded JWT token string
    """
    to_encode = data.copy()

    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(
            minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
        )

    to_encode.update({"exp": expire})

    encoded_jwt = jwt.encode(
        to_encode,
        settings.SECRET_KEY,
        algorithm=settings.ALGORITHM
    )

    return encoded_jwt


def decode_access_token(token: str) -> Dict[str, Any]:
    """
    Decode and validate a JWT access token.

    Args:
        token: The JWT token string to decode

    Returns:
        Dictionary containing the decoded token payload

    Raises:
        JWTError: If token is invalid or expired
    """
    payload = jwt.decode(
        token,
        settings.SECRET_KEY,
        algorithms=[settings.ALGORITHM]
    )
    return payload