from datetime import datetime, timedelta, timezone
from typing import Optional

from jose import JWTError, jwt
from passlib.context import CryptContext

from app.config import settings

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


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(user_id: int, admin_id: Optional[int] = None) -> str:
    expire = datetime.now(timezone.utc) + timedelta(minutes=settings.access_token_expire_minutes)
    payload: dict = {"sub": str(user_id), "exp": expire}
    if admin_id is not None:
        payload["admin_id"] = admin_id
    return jwt.encode(payload, settings.secret_key, algorithm=settings.algorithm)


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


def decode_token_full(token: str) -> Optional[dict]:
    try:
        return jwt.decode(token, settings.secret_key, algorithms=[settings.algorithm])
    except JWTError:
        return None