"""Global application state — singletons accessed by routers."""
from __future__ import annotations
from typing import Optional, TYPE_CHECKING

if TYPE_CHECKING:
    import asyncpg

_db_pool: Optional['asyncpg.Pool'] = None
_master_agent = None
_agent_registry = None
_llm_router = None
_sweep_coordinator = None


def set_db_pool(pool) -> None:
    global _db_pool
    _db_pool = pool


def get_db_pool():
    return _db_pool


def set_master_agent(agent) -> None:
    global _master_agent
    _master_agent = agent


def get_master_agent():
    return _master_agent


def set_agent_registry(registry) -> None:
    global _agent_registry
    _agent_registry = registry


def get_agent_registry():
    return _agent_registry


def set_llm_router(router) -> None:
    global _llm_router
    _llm_router = router


def get_llm_router():
    return _llm_router


def set_sweep_coordinator(coordinator) -> None:
    global _sweep_coordinator
    _sweep_coordinator = coordinator


def get_sweep_coordinator():
    return _sweep_coordinator