/**
 * Edge Styling Utility
 *
 * Standalone functions for determining edge categories and applying
 * visual styling to workflow edges based on source port data types.
 * Used by both the visual editor and the command DSL system.
 */
import type { WorkflowNode as WorkflowNodeType, WorkflowEdge, EdgeCategory } from '../types/index.js';
/**
 * Check if a port ID matches a dynamic branch in a Gateway node.
 * Gateway nodes store branches in config.branches array.
 */
export declare function isGatewayBranch(node: WorkflowNodeType, portId: string): boolean;
/**
 * Get the data type of a port from a node's metadata.
 * Also handles dynamic ports like Gateway branches.
 */
export declare function getPortDataType(node: WorkflowNodeType, portId: string, portType: 'input' | 'output'): string | null;
/**
 * Determine the edge category based on source port data type.
 * Note: This does not check for loopback edges — use getEdgeCategoryWithLoopback() for that.
 */
export declare function getEdgeCategory(sourcePortDataType: string | null): EdgeCategory;
/**
 * Determine the full edge category including loopback detection.
 * Loopback edges take precedence over source port data type.
 */
export declare function getEdgeCategoryWithLoopback(edge: WorkflowEdge, sourcePortDataType: string | null): EdgeCategory;
/**
 * Apply custom styling to a connection edge based on its source/target nodes.
 *
 * Sets:
 * - edge.data.metadata.edgeType (trigger/tool/loopback/data)
 * - edge.style, edge.class, edge.markerEnd based on category
 * - edge.data.targetNodeType and edge.data.targetCategory
 */
export declare function applyConnectionStyling(edge: WorkflowEdge, sourceNode: WorkflowNodeType, targetNode: WorkflowNodeType): void;
/**
 * Update existing edges with custom styling rules.
 * Batch operation that applies styling to all edges using a node map for O(1) lookup.
 */
export declare function updateEdgeStyles(edges: WorkflowEdge[], nodes: WorkflowNodeType[]): WorkflowEdge[];