import { SessionStateControllerAction } from './SessionStateControllerAction';
import { SessionStateControllerState } from './SessionStateControllerState';
import { SessionStateControllerTransitionResult } from './SessionStateControllerTransitionResult';
/**
 * Manages [[SessionStateControllerState]] state transitions via
 * [[SessionStateControllerAction]] actions and ensures that the work functions
 * attached to the transition are sequenced properly.
 */
export default interface SessionStateController {
    /**
     * Performs the state transition action and if the transition is possible calls
     * the work function. If the transition is not currently possible, but could
     * become possible after the next transition then the action may be deferred.
     * For example, while in the Connecting state, if Stop is called this action
     * will be deferred until the Connected state is reached.
     */
    perform(action: SessionStateControllerAction, work: () => void): SessionStateControllerTransitionResult;
    /**
     * Gets the current state.
     */
    state(): SessionStateControllerState;
}