from datetime import datetime, timedelta
from typing import Optional

import jwt
import bcrypt

from app.config.settings import settings


def hash_password(password: str) -> str:
    return bcrypt.hashpw(password.encode(), bcrypt.gensalt()).decode()


def verify_password(password: str, hashed: str) -> bool:
    return bcrypt.checkpw(password.encode(), hashed.encode())


def create_access_token(user_id: str) -> str:
    expire = datetime.utcnow() + timedelta(minutes=settings.jwt_access_expire_minutes)
    payload = {"sub": user_id, "exp": expire, "type": "access"}
    return jwt.encode(payload, settings.jwt_secret, algorithm=settings.jwt_algorithm)


def create_refresh_token(user_id: str) -> str:
    expire = datetime.utcnow() + timedelta(days=settings.jwt_refresh_expire_days)
    payload = {"sub": user_id, "exp": expire, "type": "refresh"}
    return jwt.encode(payload, settings.jwt_secret, algorithm=settings.jwt_algorithm)


def create_reset_token(user_id: str) -> str:
    expire = datetime.utcnow() + timedelta(hours=1)
    payload = {"sub": user_id, "exp": expire, "type": "reset"}
    return jwt.encode(payload, settings.jwt_secret, algorithm=settings.jwt_algorithm)


def decode_token(token: str) -> Optional[dict]:
    try:
        return jwt.decode(token, settings.jwt_secret, algorithms=[settings.jwt_algorithm])
    except jwt.PyJWTError:
        return None