from datetime import datetime, timedelta, timezone
from jose import JWTError, jwt
from passlib.context import CryptContext
from app.core.config import get_settings

settings = get_settings()
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")

ALGORITHM = "HS256"


def hash_password(password: str) -> str:
    return pwd_context.hash(password)


def verify_password(plain: str, hashed: str) -> bool:
    return pwd_context.verify(plain, hashed)


def create_token(data: dict, expires_delta: timedelta | None = None) -> str:
    to_encode = data.copy()
    expire = datetime.now(timezone.utc) + (expires_delta or timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES))
    to_encode.update({"exp": expire})
    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)


def create_access_token(user_id: int) -> str:
    return create_token({"sub": str(user_id), "type": "access"}, timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES))


def create_refresh_token(user_id: int) -> str:
    return create_token({"sub": str(user_id), "type": "refresh"}, timedelta(days=settings.REFRESH_TOKEN_EXPIRE_DAYS))


def decode_token(token: str) -> dict | None:
    try:
        return jwt.decode(token, settings.SECRET_KEY, algorithms=[ALGORITHM])
    except JWTError:
        return None