from datetime import datetime, timedelta
import bcrypt
from jose import jwt, JWTError

from app.config import settings


def get_password_hash(password: str) -> str:
    pwd_bytes = password.encode("utf-8")[:72]
    salt = bcrypt.gensalt()
    hashed = bcrypt.hashpw(pwd_bytes, salt)
    return hashed.decode("utf-8")


def verify_password(plain_password: str, hashed_password: str) -> bool:
    pwd_bytes = plain_password.encode("utf-8")[:72]
    hashed_bytes = hashed_password.encode("utf-8")
    return bcrypt.checkpw(pwd_bytes, hashed_bytes)


def create_access_token(data: dict, expires_delta: timedelta | None = None) -> str:
    to_encode = data.copy()
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(minutes=settings.access_token_expire_minutes)
    to_encode.update({"exp": expire})
    encoded_jwt = jwt.encode(to_encode, settings.secret_key, algorithm=settings.algorithm)
    return encoded_jwt


def decode_token(token: str) -> dict | None:
    try:
        payload = jwt.decode(token, settings.secret_key, algorithms=[settings.algorithm])
        return payload
    except JWTError as e:
        print(f"JWT decode error: {e}")
        return None