"""
Security utilities for authentication and authorization.
"""
from datetime import datetime, timedelta
from typing import Optional
from passlib.context import CryptContext
import jwt
from src.core.config import settings

# Password hashing context - use argon2 for Python 3.13 compatibility
pwd_context = CryptContext(schemes=["argon2"], deprecated="auto")


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

    Args:
        plain_password: Plain text password
        hashed_password: Hashed password to verify against

    Returns:
        bool: 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 argon2.

    Args:
        password: Plain text password to hash

    Returns:
        str: Hashed password
    """
    return pwd_context.hash(password)
    password = password[:72]
    return pwd_context.hash(password)


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

    Args:
        data: Dictionary containing token payload
        expires_delta: Optional custom expiration time

    Returns:
        str: Encoded JWT token
    """
    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) -> Optional[dict]:
    """
    Decode and verify a JWT access token.

    Args:
        token: JWT token string to decode

    Returns:
        Optional[dict]: Decoded token payload or None if invalid
    """
    try:
        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
        return payload
    except jwt.PyJWTError:
        return None