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from datetime import datetime, timedelta
from jose import JWTError, jwt
from typing import Any, Union
#from tinydb import TinyDB, Query
#from tinydb.storages import MemoryStorage
# Secret key to encode JWT tokens. In production, use a more secure key and keep it secret!
SECRET_KEY = "a_very_secret_key"
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30 # The expiration time for the access token
# db = TinyDB(storage=MemoryStorage)
# tokens_table = db.table('tokens')
# def insert_token(user_id: str, token: str, expires_in: timedelta):
# expiration = datetime.utcnow() + expires_in
# tokens_table.insert({'user_id': user_id, 'token': token, 'expires_at': expiration.isoformat()})
# def validate_token(user_id: str, token: str) -> bool:
# User = Query()
# result = tokens_table.search((User.user_id == user_id) & (User.token == token))
# if not result:
# return False
# # Check token expiration
# expires_at = datetime.fromisoformat(result[0]['expires_at'])
# if datetime.utcnow() > expires_at:
# return False
# return True
def create_access_token(data: dict, expires_delta: Union[timedelta, None] = None) -> str:
"""
Creates a JWT access token.
:param data: A dictionary of claims (e.g., {"sub": user_id}) to include in the token.
:param expires_delta: A timedelta object representing how long the token is valid.
:return: A JWT token as a string.
"""
to_encode = data.copy()
if expires_delta:
expire = datetime.utcnow() + expires_delta
else:
expire = datetime.utcnow() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
to_encode.update({"exp": expire})
encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
return encoded_jwt
# Additional functions can be added here for verifying tokens, decoding tokens, etc.
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