"""Shared sampler types for the open-source release."""
from __future__ import annotations

from dataclasses import dataclass, field
from typing import Callable

from torch import Tensor


@dataclass
class SamplerState:
    step: int
    total_steps: int
    t: float
    x_t: Tensor
    logits: Tensor
    remain_before: int
    remain_after: int
    selected: int
    prefix_len: int
    mask_token_id: int
    metadata: dict = field(default_factory=dict)


StepCallback = Callable[[SamplerState], None]