from datetime import datetime, timedelta, timezone  # ใช้ timezone เพื่อความแม่นยำ
from typing import Any, Union
from jose import jwt
import bcrypt
from app.core.config import settings


def create_access_token(
    subject: Union[str, Any],
    role: str,
    expires_delta: timedelta = None,
) -> str:
    if expires_delta:
        expire = datetime.now(timezone.utc) + expires_delta
    else:
        expire = datetime.now(timezone.utc) + timedelta(
            minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
        )

    to_encode = {
        "exp": expire,
        "sub": str(subject),
        "role": str(role),
        "type": "access",
    }

    encoded_jwt = jwt.encode(
        to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM
    )
    return encoded_jwt


def create_refresh_token(
    subject: Union[str, Any], expires_delta: timedelta = None
) -> str:
    if expires_delta:
        expire = datetime.now(timezone.utc) + expires_delta
    else:
        expire = datetime.now(timezone.utc) + timedelta(
            days=settings.REFRESH_TOKEN_EXPIRE_DAYS
        )

    to_encode = {"exp": expire, "sub": str(subject), "type": "refresh"}
    encoded_jwt = jwt.encode(
        to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM
    )
    return encoded_jwt


def verify_password(plain_password: str, hashed_password: str) -> bool:
    return bcrypt.checkpw(
        plain_password.encode("utf-8"), hashed_password.encode("utf-8")
    )


def get_password_hash(password: str) -> str:
    return bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt()).decode("utf-8")