# SPDX-License-Identifier: Apache-2.0

from collections import deque
from dataclasses import dataclass
from typing import Deque, Dict, Iterable, List, Optional, Protocol, Tuple

from vllm.core.block.interfaces import Block, BlockAllocator

BlockId = int
RefCount = int

class BlockList:
    def append_token_ids(self, block_index: int, token_ids: List[int], seq_id: Optional[int]=None) -> None:
        block = self._blocks[block_index]
        prev_block_id = block.block_id

        block.append_token_ids(token_ids, seq_id=seq_id)

        # CoW or promotion may update the internal block_id
        if prev_block_id != block.block_id:
            self._update_block_id(block_index, block.block_id)