from passlib.context import CryptContext
from jose import jwt, JWTError
from datetime import datetime, timedelta, timezone
from core.config import settings
import uuid

pwd_context = CryptContext(schemes=["argon2"], 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_access_token(user_id: str) -> str:
    expire = datetime.now(timezone.utc) + timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
    payload = {
        "sub": user_id,
        "type": "access",
        "iat": datetime.now(timezone.utc),
        "exp": expire,
        "jti": str(uuid.uuid4())
    }
    return jwt.encode(payload, settings.SECRET_KEY, algorithm="HS256")

def create_refresh_token(user_id: str) -> str:
    expire = datetime.now(timezone.utc) + timedelta(days=settings.REFRESH_TOKEN_EXPIRE_DAYS)
    payload = {
        "sub": user_id,
        "type": "refresh",
        "iat": datetime.now(timezone.utc),
        "exp": expire,
        "jti": str(uuid.uuid4())
    }
    return jwt.encode(payload, settings.SECRET_KEY, algorithm="HS256")

def decode_token(token: str):
    try:
        return jwt.decode(token, settings.SECRET_KEY, algorithms=["HS256"])
    except JWTError:
        return None