import { Result } from './result.js';
/**
 * Generates DOT graph visualizations of routing results.
 *
 * The generated graph shows:
 * - Stations as rectangular nodes (origin=blue, destination=violet)
 * - Vehicle edges as ovals with route info
 * - Transfer edges as dashed ovals
 * - Continuation edges (same-station transfers) as bold yellow ovals
 *
 * @example
 * ```typescript
 * const plotter = new Plotter(routingResult);
 * const dotGraph = plotter.plotDotGraph();
 * // Use with Graphviz: dot -Tpng -o graph.png
 * ```
 */
export declare class Plotter {
    private result;
    constructor(result: Result);
    /**
     * Generates a unique node ID for a station.
     */
    private stationNodeId;
    /**
     * Generates a unique node ID for a vehicle edge oval.
     */
    private vehicleEdgeNodeId;
    /**
     * Generates a unique node ID for a transfer edge oval.
     */
    private transferEdgeNodeId;
    /**
     * Generates a unique node ID for a walking access edge oval.
     */
    private accessEdgeNodeId;
    /**
     * Generates a unique node ID for a continuation edge oval.
     */
    private continuationNodeId;
    /**
     * Gets the color for a round based on the configured palette.
     */
    private getRoundColor;
    /**
     * Gets the appropriate fill color for a station based on its type.
     */
    private getStationFillColor;
    /**
     * Escapes special characters in DOT strings to prevent syntax errors.
     */
    private escapeDotString;
    /**
     * Formats a stop name for display, including platform information.
     */
    private formatStopName;
    /**
     * Determines station type (origin/destination) information.
     */
    private getStationInfo;
    /**
     * Resolves the actual StopId from a VehicleEdge's stopIndex.
     */
    private getVehicleEdgeFromStopId;
    /**
     * Resolves the actual StopId from a VehicleEdge's hopOffStopIndex.
     */
    private getVehicleEdgeToStopId;
    /**
     * Creates a DOT node for a station.
     */
    private createStationNode;
    /**
     * Creates a vehicle edge with route information oval in the middle.
     */
    private createVehicleEdge;
    /**
     * Creates a walking access leg as a dashed oval connecting the query origin
     * to the initial boarding stop.
     */
    private createAccessEdge;
    /**
     * Creates a transfer edge with transfer information oval in the middle.
     */
    private createTransferEdge;
    /**
     * Creates a continuation edge to visually link trip continuations.
     */
    private createContinuationEdge;
    /**
     * Collects all stations that appear in the routing graph.
     */
    private collectStations;
    /**
     * Collects all continuation edges from a vehicle edge chain.
     */
    private collectContinuationChain;
    /**
     * Collects all edges for the routing graph.
     */
    private collectEdges;
    /**
     * Plots the routing graph as a DOT graph for visualization.
     *
     * @returns A string containing the DOT graph representation.
     */
    plotDotGraph(): string;
}