/* =============================================================================
 * A00_Common/design/logic/design_calc_node_route.ts
 * 계산 Node 입구(`design_calc_node.ts`)의 노선 몫(PLAN 511-B B-5) — 화면 노선 편집과 같은 TS.
 *
 *   route.polyline  입력 route_polyline { points · curve_flags · radii · locks · arcs · min_radius_m } →
 *                   { cleaned: 겹친 점(0.5 m) 뺀 노드 · nodes: 노드 요약(cleaned 자리) · vertices: 선 ·
 *                   curves: 곡선(node_first · last = cleaned 자리) · edits: 곡선표 편집표 }
 *                   — 서버 노선 저장 `_write_planned_polyline`(편집 갈래 · 파이썬은 파일 꼴 반올림만)
 * ========================================================================== */

import {
  buildEditedPolyline,
  DUPLICATE_TOLERANCE_M,
  type Vertex,
} from "../../../B05_Profile/logic/B05_Profile_UI_RouteEdit_Curve";
import { nodeEdits } from "../../../B05_Profile/logic/B05_Profile_UI_RouteEdit_Edits";

export interface RouteInputs {
  route_polyline?: {
    points: Vertex[];
    curve_flags?: Array<boolean | null> | null;
    radii?: Array<number | null> | null;
    locks?: Array<string | null> | null;
    arcs?: Array<number | null> | null;
    min_radius_m: number;
  };
}

/** id → 셈(입구 `RUNNERS` 에 얹음). */
export function routeRunners(inputs: RouteInputs): Record<string, () => unknown> {
  return {
    "route.polyline": () => {
      const at = inputs.route_polyline;
      if (!at) throw new Error("노선 입력(route_polyline) 없음");
      const flags = at.curve_flags ?? null;
      const radii = at.radii ?? null;
      // 겹친 점을 편집값과 함께 거름 — 곡선 자리 번호 = 저장 노드 자리(파이썬 `build_planned_polyline`)
      const cleaned: Vertex[] = [];
      const on: boolean[] = [];
      const forced: Array<number | null> = [];
      at.points.forEach((point, index) => {
        const last = cleaned[cleaned.length - 1];
        if (last && Math.hypot(point[0] - last[0], point[1] - last[1]) <= DUPLICATE_TOLERANCE_M)
          return;
        cleaned.push(point);
        on.push(flags && index < flags.length ? Boolean(flags[index]) : true);
        forced.push(radii && index < radii.length ? radii[index] : null);
      });
      const line = buildEditedPolyline(cleaned, on, forced, at.min_radius_m);
      return {
        cleaned,
        nodes: line.nodes,
        vertices: line.vertices,
        curves: line.curves,
        edits: nodeEdits(at.points, flags, radii, at.locks ?? null, at.arcs ?? null),
      };
    },
  };
}