/*
 * index.ts — the public API surface of @araharah/routing (D-01, D-03, D-07).
 * ---------------------------------------------------------------------------
 * Named exports ONLY (no default export). The package has NO exports /
 * main field (the @araharah/theme + @araharah/search precedent), so
 * consumers import the EXPLICIT SUBPATH WITH EXTENSION —
 *   import { snapToGraph } from "@araharah/routing/src/index.ts";
 * (both tsconfigs carry allowImportingTsExtensions + bundler resolution;
 * esbuild and Vite compile the .ts source; Node 24 type-stripping handles
 * the corpus runner's relative form). A bare "@araharah/routing" specifier
 * resolves to NOTHING — never use it.
 *
 * THE BACKEND LADDER (D-01 supersedes the phase-5 "wasm-router" note):
 *   #1  "fixture"   — createFixtureRoutingSource: the golden-pairs demo
 *                     corpus (15 committed KL pairs).
 *   #2  "engine-a"  — LIVE (plan 06-04): the Worker-side router built on
 *                     THIS package's data plane (decodeGraph + snapToGraph +
 *                     routeAstar over an R2-hosted CSR graph), consumed
 *                     client-side through createHttpRoutingSource (the
 *                     Bearer-gated POST /api/route seam). Engine B (a fully
 *                     client-side webview router — graph on the phone) is
 *                     engine A's documented post-v1 evolution (D-02). The
 *                     Valhalla-to-JS port was ruled infeasible and
 *                     geojson-path-finder rejected (demo-grade: no
 *                     alternatives/one-ways) — recorded so neither is ever
 *                     re-proposed (D-02).
 *   Engine B remains the documented future rung; nothing else is planned.
 *
 * The module reads NO environment, NO secrets, and NO network (D-05/D-12):
 * the whole routing stack is V8-native and dependency-free — fixtures ride
 * the bundle, requests never leave the caller's frame.
 */

export type {
  RoutePoint, RouteRequest, RouteSummary, RouteStep,
  RouteGeometry, RouteOption, RouteResult, RoutingSource,
  FixturePair, FixtureRoute,
} from "./types.ts";
export { decodePolyline6, encodePolyline6 } from "./polyline.ts";
export { haversineM, deriveCumulativeDistanceM } from "./geo.ts";
export {
  ORIGIN_TOLERANCE_M,
  createFixtureRoutingSource,
  getPairOrigin,
  getPairs,
} from "./fixture-source.ts";
export { createHttpRoutingSource } from "./http-source.ts";
export type { HttpRoutingSourceOptions } from "./http-source.ts";
export type { RoadGraph, GraphEdgeInput, GraphInput } from "./graph.ts";
export {
  decodeGraph,
  encodeGraph,
  GRAPH_MAGIC,
  GRAPH_VERSION,
  UNNAMED_NAME_ID,
} from "./graph.ts";
export type { SnapResult } from "./snap.ts";
export { snapToGraph, SNAP_BBOX_MARGIN_DEG } from "./snap.ts";
export type { AstarResult, GuidanceTurnKind } from "./astar.ts";
export {
  routeAstar,
  deriveSteps,
  classifyTurn,
  TURN_STRAIGHT_MAX_DEG,
  TURN_SLIGHT_MAX_DEG,
  TURN_UTURN_MIN_DEG,
} from "./astar.ts";