from passlib.context import CryptContext
from datetime import datetime, timedelta, timezone
from app.core.config import settings
import jwt
from fastapi import HTTPException, status

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 generate_jwt(data: dict, expires: timedelta | None = None):
    to_encode = data.copy()
    if expires:
        expire = datetime.now(timezone.utc) + expires
    else:
        expire = datetime.now(timezone.utc) + timedelta(minutes=15)
    to_encode.update({"exp": expire})
    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
    return encoded_jwt


def verify_jwt(token: str):
    try:
        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
        return payload
    except jwt.PyJWTError:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Token inválido o expirado",
            headers={"WWW-Authenticate": "Bearer"},
        )