from datetime import datetime, timedelta, timezone
from typing import Optional
from jose import JWTError, jwt
from passlib.context import CryptContext
from app.core.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_password: str, hashed_password: str) -> bool:
    return pwd_context.verify(plain_password, hashed_password)


def create_access_token(subject: str | int, expires_delta: Optional[timedelta] = None) -> str:
    expire = datetime.now(timezone.utc) + (
        expires_delta or timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
    )
    payload = {"sub": str(subject), "exp": expire, "type": "access"}
    return jwt.encode(payload, settings.SECRET_KEY, algorithm=settings.ALGORITHM)


def create_refresh_token(subject: str | int) -> str:
    expire = datetime.now(timezone.utc) + timedelta(days=settings.REFRESH_TOKEN_EXPIRE_DAYS)
    payload = {"sub": str(subject), "exp": expire, "type": "refresh"}
    return jwt.encode(payload, settings.SECRET_KEY, algorithm=settings.ALGORITHM)


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