"""
JWT authentication service
"""
from datetime import datetime, timedelta
from typing import Optional
from jose import JWTError, jwt
import bcrypt
from app.config import settings


def verify_password(plain_password: str, hashed_password: str) -> bool:
    """Verify a password against a hash"""
    return bcrypt.checkpw(plain_password.encode('utf-8'), hashed_password.encode('utf-8'))


def hash_password(password: str) -> str:
    """Hash a password"""
    salt = bcrypt.gensalt()
    hashed = bcrypt.hashpw(password.encode('utf-8'), salt)
    return hashed.decode('utf-8')


def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
    """Create a JWT access token"""
    to_encode = data.copy()
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(minutes=settings.jwt_access_token_expire_minutes)

    to_encode.update({"exp": expire})
    encoded_jwt = jwt.encode(to_encode, settings.jwt_secret_key, algorithm=settings.jwt_algorithm)
    return encoded_jwt


def decode_access_token(token: str) -> Optional[dict]:
    """Decode and verify a JWT access token"""
    try:
        payload = jwt.decode(token, settings.jwt_secret_key, algorithms=[settings.jwt_algorithm])
        return payload
    except JWTError:
        return None