# application/auth/token/token_manager.py
from datetime import datetime, timedelta, timezone
from typing import Dict
from jose import jwt
from infra.config.app_settings import app_settings


class TokenManager:
    def __init__(self):
        self.secret_key = app_settings.JWT_SECRET_KEY
        self.algorithm = "HS256"
        self.access_token_expire_minutes = app_settings.ACCESS_TOKEN_EXPIRE_MINUTES
        self.refresh_token_expire_days = app_settings.REFRESH_TOKEN_EXPIRE_DAYS

    def create_access_token(self, subject: Dict[str, str]) -> str:
        """
        Generates an access token with a short expiration time.
        Args:
            subject (Dict[str, str]): A dictionary containing user information like 'id' and 'role'.

        Returns:
            str: Encoded JWT access token.
        """
        expire = datetime.now(timezone.utc) + timedelta(
            minutes=self.access_token_expire_minutes
        )
        to_encode = subject.copy()
        to_encode.update({"exp": expire})
        return jwt.encode(to_encode, self.secret_key, algorithm=self.algorithm)

    def create_refresh_token(self, subject: Dict[str, str]) -> str:
        """
        Generates a refresh token with a longer expiration time.
        Args:
            subject (Dict[str, str]): A dictionary containing user information like 'id' and 'role'.

        Returns:
            str: Encoded JWT refresh token.
        """
        expire = datetime.now(timezone.utc) + timedelta(
            days=self.refresh_token_expire_days
        )
        to_encode = subject.copy()
        to_encode.update({"exp": expire})
        return jwt.encode(to_encode, self.secret_key, algorithm=self.algorithm)

    def decode_token(self, token: str) -> Dict:
        """
        Decodes a JWT token and returns the payload.
        Args:
            token (str): Encoded JWT token.

        Returns:
            Dict: Decoded token payload.

        Raises:
            JWTError: If the token is invalid or expired.
        """
        return jwt.decode(token, self.secret_key, algorithms=[self.algorithm])