from __future__ import annotations

from datetime import date, datetime, timedelta
from typing import Optional

from jose import JWTError, jwt
from passlib.context import CryptContext
from sqlalchemy.orm import Session

from app.config import settings
from app.models import Profile, User

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


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


def verify_password(password: str, password_hash: str) -> bool:
    return pwd_context.verify(password, password_hash)


def create_access_token(subject: str = "user") -> str:
    expire = datetime.utcnow() + timedelta(minutes=settings.access_token_expire_minutes)
    return jwt.encode(
        {"sub": subject, "exp": expire},
        settings.secret_key,
        algorithm="HS256",
    )


def decode_token(token: str) -> Optional[str]:
    try:
        payload = jwt.decode(token, settings.secret_key, algorithms=["HS256"])
        return payload.get("sub")
    except JWTError:
        return None


def get_or_create_profile(db: Session) -> Profile:
    profile = db.query(Profile).first()
    if not profile:
        profile = Profile()
        db.add(profile)
        db.commit()
        db.refresh(profile)
    return profile


def has_password(db: Session) -> bool:
    return db.query(User).first() is not None


def get_user(db: Session) -> Optional[User]:
    return db.query(User).first()