/**
 * Editor State Machine for WorkflowEditor (Svelte 5 Runes)
 *
 * Centralizes all reactive guard logic into explicit states and transitions.
 * Replaces scattered boolean flags (isDraggingNode, isRestoringFromHistory,
 * lastEditorStoreValue identity checks) with a single source of truth.
 *
 * @module stores/editorStateMachine
 */
export type EditorState = 'uninitialized' | 'loading' | 'idle' | 'dragging' | 'connecting' | 'dropping' | 'restoring' | 'deleting' | 'updating_node';
export type EditorEvent = 'WORKFLOW_LOADED' | 'LOAD_COMPLETE' | 'START_DRAG' | 'STOP_DRAG' | 'START_CONNECT' | 'CONNECTION_MADE' | 'CONNECTION_CANCELLED' | 'START_DROP' | 'DROP_COMPLETE' | 'DROP_CANCELLED' | 'START_RESTORE' | 'RESTORE_COMPLETE' | 'EXTERNAL_STORE_CHANGE' | 'SYNC_COMPLETE' | 'START_DELETE' | 'DELETE_COMPLETE' | 'START_NODE_UPDATE' | 'UPDATE_COMPLETE' | 'WORKFLOW_SWITCHED' | 'WORKFLOW_CLEARED' | 'RESET';
/** What operations are permitted in the current state */
export interface StatePermissions {
    /** Whether the editor can write to the global workflow store */
    canWriteToStore: boolean;
    /** Whether the editor can push to undo/redo history */
    canPushHistory: boolean;
    /** Suppress the store → flowNodes/flowEdges sync effect */
    suppressEffect: boolean;
}
export interface EditorStateMachine {
    /** Current state (reactive via $state) */
    readonly current: EditorState;
    /** Current permissions (reactive, derived from current state) */
    readonly permissions: StatePermissions;
    /** Attempt a transition. Returns true if the transition was valid. */
    send(event: EditorEvent): boolean;
    /** Check if an event is valid from the current state */
    canSend(event: EditorEvent): boolean;
    /** Subscribe to state changes (for debugging/logging). Returns unsubscribe function. */
    onTransition(callback: (from: EditorState, event: EditorEvent, to: EditorState) => void): () => void;
}
/**
 * Create an editor state machine instance.
 *
 * Uses Svelte 5 `$state` rune for reactivity so that components can
 * read `machine.current` and `machine.permissions` inside `$derived`
 * or `$effect` blocks and react to state changes.
 *
 * Each WorkflowEditor component instance should create its own machine.
 */
export declare function createEditorStateMachine(initialState?: EditorState): EditorStateMachine;