/**
 * SmartEdge — React Flow custom edge that renders:
 *   - smoothstep path (same look as the default smoothstep edge)
 *   - crow's-foot / one / triangle markers at source + target based on
 *     `data.cardinality` (§3.6 item 2)
 *   - dashed stroke when `data.onDelete === 'SET NULL'` (§3.9 integration)
 *
 * Reference: `docs/plans/20260501-universal-wysiwyg-schema-ux-v1.00W.md`
 * §3.6 items 2 + 5.
 *
 * Each edge defines its own `<marker>` elements inline with IDs prefixed by
 * the edge `id` so multiple edges on the same canvas cannot collide on SVG
 * `<defs>` IDs.
 */
import type { CSSProperties, ReactElement } from 'react';
import type { EdgeProps } from '@xyflow/react';
import type { Cardinality, ReferentialAction } from '../../schemas.js';
export interface SmartEdgeData {
    cardinality?: Cardinality;
    onDelete?: ReferentialAction | null;
    stroke?: string;
    [key: string]: unknown;
}
/**
 * Resolve the marker IDs for a given edge. Exported so tests can assert the
 * cardinality → marker mapping without mounting the full edge.
 */
export declare function getMarkerIdsForCardinality(edgeId: string, cardinality: Cardinality | undefined): {
    markerStartId?: string;
    markerEndId?: string;
};
/**
 * Build the edge style object. Pure so tests can assert the dashed-stroke and
 * accent-color logic without rendering.
 */
export declare function buildSmartEdgeStyle(cardinality: Cardinality | undefined, onDelete: ReferentialAction | null | undefined, override?: CSSProperties): CSSProperties;
/**
 * Subcomponent that renders just the `<defs>` with the appropriate markers
 * for a given cardinality. Exposed separately so tests can mount it inside a
 * plain `<svg>` without needing React Flow's edge context.
 */
export declare function SmartEdgeMarkers({ edgeId, cardinality, color, }: {
    edgeId: string;
    cardinality: Cardinality | undefined;
    color: string;
}): ReactElement;
/**
 * React Flow custom edge. Reads `data.cardinality` / `data.onDelete` to pick
 * markers and stroke style.
 */
export declare function SmartEdge(props: EdgeProps & {
    data?: SmartEdgeData;
}): ReactElement;
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