from typing import Optional
import numpy as np


class FaissIndexManager:
    def __init__(self, dimension: int, index_type: str = "IVF"):
        self._dimension = dimension
        self._index_type = index_type
        self._index = None
        self._id_map: dict[int, str] = {}

    def build_index(self, vectors: np.ndarray, ids: list[str]) -> bool:
        raise NotImplementedError

    def add_vectors(self, vectors: np.ndarray, ids: list[str]) -> bool:
        raise NotImplementedError

    def search(
        self, query: np.ndarray, top_k: int = 10
    ) -> list[tuple[str, float]]:
        raise NotImplementedError

    def remove_vectors(self, ids: list[str]) -> bool:
        raise NotImplementedError

    def save_index(self, path: str) -> bool:
        raise NotImplementedError

    def load_index(self, path: str) -> bool:
        raise NotImplementedError

    def get_vector_count(self) -> int:
        raise NotImplementedError