"""JWT token generation and validation."""

from datetime import datetime, timedelta, timezone
from uuid import UUID

from jose import JWTError, jwt

from app.core.config import settings


def create_access_token(user_id: UUID, email: str, expires_delta: timedelta | None = None) -> str:
    """
    Create a new JWT access token.

    Args:
        user_id: User's UUID
        email: User's email address
        expires_delta: Optional custom expiration time

    Returns:
        Encoded JWT token string
    """
    if expires_delta:
        expire = datetime.now(timezone.utc) + expires_delta
    else:
        expire = datetime.now(timezone.utc) + timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)

    to_encode = {"sub": str(user_id), "email": email, "exp": expire, "iat": datetime.now(timezone.utc), "type": "access"}

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


def decode_access_token(token: str) -> dict | None:
    """
    Decode and validate a JWT access token.

    Args:
        token: JWT token string to decode

    Returns:
        Decoded token payload if valid, None otherwise
    """
    try:
        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
        return payload
    except JWTError:
        return None