from passlib.context import CryptContext
from jose import JWTError, jwt
from datetime import datetime, timedelta
import secrets
import string
import bcrypt

# Password hashing
# Use a simpler CryptContext configuration to avoid bcrypt.__about__ error
pwd_context = CryptContext(schemes=["bcrypt"])

# JWT settings
SECRET_KEY = "CHANGE_THIS_TO_A_STRONG_SECRET_KEY_IN_PRODUCTION"
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30

def verify_password(plain_password, hashed_password):
    """Verify if the plain password matches the hashed one."""
    return pwd_context.verify(plain_password, hashed_password)

def get_password_hash(password):
    """Hash a password for storing."""
    return pwd_context.hash(password)

def create_access_token(data: dict, expires_delta: timedelta = None):
    """Create JWT access token."""
    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

def generate_token(length=32):
    """Generate a random token for email verification or password reset."""
    alphabet = string.ascii_letters + string.digits
    return ''.join(secrets.choice(alphabet) for i in range(length))