from typing import Generator, List

from facefusion.typing import QueuePayload, ProcessState

PROCESS_STATE : ProcessState = 'pending'


def get_process_state() -> ProcessState:
	return PROCESS_STATE


def set_process_state(process_state : ProcessState) -> None:
	global PROCESS_STATE

	PROCESS_STATE = process_state


def is_checking() -> bool:
	return get_process_state() == 'checking'


def is_processing() -> bool:
	return get_process_state() == 'processing'


def is_stopping() -> bool:
	return get_process_state() == 'stopping'


def is_pending() -> bool:
	return get_process_state() == 'pending'


def check() -> None:
	set_process_state('checking')


def start() -> None:
	set_process_state('processing')


def stop() -> None:
	set_process_state('stopping')


def end() -> None:
	set_process_state('pending')


def manage(queue_payloads : List[QueuePayload]) -> Generator[QueuePayload, None, None]:
	for query_payload in queue_payloads:
		if is_processing():
			yield query_payload