import threading
from types import TracebackType
from typing import Protocol
from uuid import UUID

from usecase.interface import LockContext, SandboxLifecycleLocker


class _SyncLock(Protocol):
    def acquire(self, blocking: bool = True, timeout: float = -1) -> bool: ...

    def release(self) -> None: ...


class _ChatLock(LockContext):
    def __init__(self, lock: _SyncLock) -> None:
        self._lock = lock

    def __enter__(self) -> None:
        self._lock.acquire()

    def __exit__(
        self,
        exc_type: type[BaseException] | None,
        exc: BaseException | None,
        traceback: TracebackType | None,
    ) -> bool | None:
        self._lock.release()
        return None


class ProcessLocalSandboxLifecycleLocker(SandboxLifecycleLocker):
    def __init__(self) -> None:
        self._registry_lock = threading.Lock()
        self._locks_by_chat_id: dict[UUID, _SyncLock] = {}

    def lock(self, chat_id: UUID) -> LockContext:
        with self._registry_lock:
            lock = self._locks_by_chat_id.get(chat_id)
            if lock is None:
                lock = threading.Lock()
                self._locks_by_chat_id[chat_id] = lock

        return _ChatLock(lock)