import type { ReadonlySignal } from '@nonoun/native-core';
import type { CommandBus } from './command-bus.ts';
export interface WorkflowState {
    readonly id: string;
    readonly onEntry?: string;
    readonly onExit?: string;
    readonly initial?: string;
    readonly children?: readonly WorkflowState[];
}
export interface WorkflowTransition {
    readonly from: string;
    readonly event: string;
    readonly to: string;
    readonly guard?: (context: WorkflowContext) => boolean;
    readonly action?: string;
}
export interface WorkflowDefinition {
    readonly id: string;
    readonly initial: string;
    readonly states: readonly WorkflowState[];
    readonly transitions: readonly WorkflowTransition[];
    readonly context?: Record<string, unknown>;
}
export interface WorkflowContext {
    readonly [key: string]: unknown;
}
export interface TransitionRecord {
    readonly id: string;
    readonly timestamp: number;
    readonly event: string;
    readonly from: string;
    readonly to: string;
    readonly guardsPassed: readonly string[];
    readonly guardsBlocked: readonly string[];
    readonly action?: string;
}
export interface WorkflowSnapshot {
    readonly definitionId: string;
    readonly currentState: string;
    readonly context: WorkflowContext;
    readonly history: readonly TransitionRecord[];
    readonly timestamp: number;
}
export interface TransitionExplanation {
    readonly would: boolean;
    readonly from: string;
    readonly to: string | null;
    readonly blockedGuards: readonly string[];
}
export declare class WorkflowEngine {
    #private;
    readonly currentState: ReadonlySignal<string>;
    readonly context: ReadonlySignal<WorkflowContext>;
    readonly history: ReadonlySignal<readonly TransitionRecord[]>;
    readonly running: ReadonlySignal<boolean>;
    constructor(definition: WorkflowDefinition, bus?: CommandBus);
    start(): void;
    send(event: string, data?: unknown): TransitionRecord | null;
    stop(): void;
    setContext(key: string, value: unknown): void;
    getContext<T = unknown>(key: string): T | undefined;
    getAvailableEvents(): readonly string[];
    canSend(event: string): boolean;
    explain(event: string): TransitionExplanation;
    snapshot(): WorkflowSnapshot;
    static restore(snapshot: WorkflowSnapshot, definition: WorkflowDefinition, bus?: CommandBus): WorkflowEngine;
    destroy(): void;
}
export declare function createWorkflowEngine(definition: WorkflowDefinition, bus?: CommandBus): WorkflowEngine;
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