/* =============================================================================
 * A00_Common/design/logic/design_calc_node_sections.ts
 * 계산 Node 입구(`design_calc_node.ts`)의 측점 몫(PLAN 511-B B-2) — 화면 묶음 stations 단계와 같은 TS.
 *
 *   stations.list      입력 stations { line · curves · pipes · structures · types · definition? · plus ·
 *                      interval_m · include_endpoint? · station_snap · station_snap_step } →
 *                      측점 목록(`buildStations` · 열쇠 · 종류 · 반경 · 확폭 · 지반 null) — 계산 자리 「서버」 ·
 *                      노선 저장 옛 노선 열쇠
 *   stations.sections  같은 입력 + grid(DTM 격자 이진 경로) · 표본 간격 → 서버 `generate_sections` 꼴
 *                      (`generateSections`) — 서버 측점 생성 길만(창구 `/calc` 는 막음 · 경로 입력)
 *   stations.plan      입력 stations { types · definition? · plan: [{ pipes · structures · plus }] } → 묶음마다
 *                      측점 계획(`planStations`) — 서버 남은 부름(이월 열쇠 주인 · 옛 측점 옮기기 · 511-B B-5)
 * definition = 구조물 정의(`{types, …정의}` · 화면 `fetchStructureTypes` 와 같은 꼴) — 심는 측점 · 카드 이름 표.
 * ========================================================================== */

import { useCatalogDefinition, type CatalogDefinition } from "@util/common_util_structure_catalog";
import {
  planStations,
  type PlanPipe,
  type PlanStructure,
  type PlanType,
} from "@util/common_util_structure_station";
import { buildStations } from "../../../B05_Profile/logic/B05_Profile_Sections_Stations";
import { generateSections } from "../../../B05_Profile/logic/B05_Profile_Sections_Generate";
import type { DesignCurve, Vertex } from "./design_pipeline_types";
import { gridAt } from "./design_calc_node_stages";

export interface SectionsInputs {
  stations?: {
    line: Vertex[];
    curves?: DesignCurve[];
    pipes?: PlanPipe[];
    structures?: PlanStructure[];
    types: PlanType[];
    definition?: CatalogDefinition | null;
    plus?: number[];
    interval_m?: number;
    include_endpoint?: boolean;
    station_snap?: boolean;
    station_snap_step?: number | null;
    grid?: string;
    cross_half_width_m?: number;
    cross_sample_interval_m?: number;
    long_sample_interval_m?: number;
    plan?: Array<{ pipes?: PlanPipe[]; structures?: PlanStructure[]; plus?: number[] }>;
  };
}

/** id → 셈(입구 `RUNNERS` 에 얹음). */
export function sectionsRunners(inputs: SectionsInputs): Record<string, () => unknown> {
  const args = () => {
    const at = inputs.stations;
    if (!at) throw new Error("측점 입력(stations) 없음");
    if (at.definition !== undefined) useCatalogDefinition(at.definition);
    const options = {
      intervalM: at.interval_m,
      includeEndpoint: at.include_endpoint,
      stationSnap: at.station_snap ?? false,
      stationSnapStep: at.station_snap_step ?? null,
      types: at.types,
      plus: at.plus ?? [],
      crossHalfWidthM: at.cross_half_width_m,
      crossSampleIntervalM: at.cross_sample_interval_m,
      longSampleIntervalM: at.long_sample_interval_m,
    };
    return { at, options };
  };
  return {
    "stations.list": () => {
      const { at, options } = args();
      return buildStations(at.line, at.curves ?? [], at.pipes ?? [], at.structures ?? [], options);
    },
    "stations.plan": () => {
      const { at } = args();
      return (at.plan ?? []).map((group) =>
        planStations(
          group.pipes ?? [],
          group.structures ?? [],
          at.types,
          undefined,
          group.plus ?? [],
        ),
      );
    },
    "stations.sections": () => {
      const { at, options } = args();
      if (!at.grid) throw new Error("DTM 격자 없음 — DTM 아닌 지표면은 파이썬 길");
      const grid = gridAt(at.grid);
      return generateSections(
        at.line,
        at.curves ?? [],
        at.pipes ?? [],
        at.structures ?? [],
        grid,
        options,
      );
    },
  };
}