Aislo/B05_Profile/logic/B05_Profile_Pipeline_Detail.ts

/* =============================================================================
 * B05_Profile_Pipeline_Detail.ts
 * 계산 묶음(PLAN 346-1 · 346-2) 출력 → 종단도 · 유토곡선이 읽는 상세 꼴(`SectionDetailResponse`).
 * 노선 초안 동안 종단도가 저장 노선 상세 대신 이 상세를 그림(지반 · 측점 · 횡단 면적이 새 노선 것).
 *
 *   uphillSide      측점 상단측(좌 · 우 지반 평균이 높은 쪽) — 서버 단면 유형 기본값(`{쪽}_cut`) 재료.
 *                   ⚠ ① 짝 — `B05_Profile_Engine_Sections_Core.py` `uphill_side` · 거울 시험
 *                   `resources/tester/test_346_2_pipeline_cross_page.py`.
 *   crossWithUphill cross 단계 입력에 단면 유형 기본값(상단측)을 얹음 — 서버 노선 저장이 단면 유형 ·
 *                   측구 방향을 새 지형으로 정하는 것과 같은 규칙(넘기는 칸 = 부르는 쪽 입력).
 *   draftSectionDetail ground · profile · cross → 상세(측점 · 지반 · 횡단 설계 · 얹힌 시설 제원).
 *
 * 순수 — 화면 · fetch · 세션 없음.
 * ========================================================================== */

import type {
  CrossSection,
  SectionDetailResponse,
  SectionStation,
} from "../../B06_Section/B06_Section_Api_Types";
import type {
  CrossOutput,
  GroundOutput,
  PipelineStation,
} from "../../A00_Common/design/design_pipeline_types";
import type { ProfileAlignment } from "../B05_Profile_UI_Profile_Alignment";
import { stationLabel } from "../../common_util/common_util_station";
import { stationIdOf } from "./B05_Profile_Pipeline_Grade";

/** 측점에 얹힌 시설 제원(저장 상세에서 측점 열쇠로 옮김) — 낡음 판정 · 그림이 읽음. */
export type SectionSpecs = Partial<
  Pick<
    CrossSection,
    | "structure"
    | "culvert"
    | "ford"
    | "box"
    | "ford_pavement"
    | "revetment"
    | "pavement"
    | "underdrain"
  >
>;

/** cross 단계 입력 꼴(`B06_Section_Cross_Stage` `CrossStageInput`) — 칸은 그 단계 몫. */
export interface CrossInput {
  standard: unknown;
  byKey: Record<string, Record<string, unknown>>;
}

const mean = (values: number[]): number => values.reduce((sum, v) => sum + v, 0) / values.length;

/** 상단측 — 좌 · 우 유효 지반 평균이 높은 쪽 · 한쪽이 비거나 차이가 1e-6 안이면 null(서버와 같음). */
export function uphillSide(station: PipelineStation): "left" | "right" | null {
  const valid = (side: "left" | "right"): number[] =>
    (station.ground?.[side] ?? [])
      .filter((sample) => sample.offsetM > 1e-9 && sample.z !== null && Number.isFinite(sample.z))
      .map((sample) => sample.z as number);
  const left = valid("left");
  const right = valid("right");
  if (!left.length || !right.length) return null;
  const gap = mean(left) - mean(right);
  if (Math.abs(gap) <= 1e-6) return null;
  return gap > 0 ? "left" : "right";
}

/** 측점마다 단면 유형 기본값(상단측 깎기 · 모르면 좌) — 입력이 정한 단면 유형은 그대로. */
export function crossWithUphill(
  input: CrossInput | null,
  stations: ReadonlyArray<PipelineStation>,
): CrossInput | null {
  if (!input) return null;
  const byKey: CrossInput["byKey"] = {};
  for (const station of stations)
    byKey[station.key] = {
      sectionMode: `${uphillSide(station) ?? "left"}_cut`,
      ...input.byKey[station.key],
    };
  return { standard: input.standard, byKey };
}

const kindOf = (station: PipelineStation): SectionStation["kind"] =>
  station.key === "end:BP"
    ? "bp"
    : station.key === "end:EP"
      ? "ep"
      : station.kind === "grid"
        ? "regular"
        : "irregular";

/** 묶음 출력 → 상세. 저장 상세의 종단 머리(이름 · 계획선 묶음)는 그대로 · 측점 · 지반 · 횡단은 새 노선. */
export function draftSectionDetail(
  saved: SectionDetailResponse,
  ground: GroundOutput,
  profile: ProfileAlignment,
  cross: CrossOutput | null,
  specs: ReadonlyMap<string, SectionSpecs>,
  intervalM: number,
): SectionDetailResponse {
  const sections: CrossSection[] = ground.stations.map((station) => {
    const own = specs.get(station.key) ?? {};
    const center = station.ground?.centerZ ?? null;
    const head: SectionStation = {
      station_id: stationIdOf(station.chainageM),
      chainage_m: station.chainageM,
      label: stationLabel(station.chainageM, intervalM),
      kind: kindOf(station),
      ...(own.structure ? { structure: own.structure } : {}),
      center_z: center,
      azimuth_deg: station.azimuthDeg,
      plan_radius_m: station.planRadiusM,
      curve_outer_side: station.curveOuterSide,
      curve_widening_m: station.curveWideningM,
      center_x: station.x,
      center_y: station.y,
      uphill_side: uphillSide(station),
      frame: { left_xy: station.left },
    };
    const sample = (offset: number, z: number | null) => ({
      offset_m: offset,
      elevation_m: z,
      valid: z !== null && Number.isFinite(z),
    });
    const samples = [
      ...[...(station.ground?.right ?? [])].reverse().map((s) => sample(-s.offsetM, s.z)),
      sample(0, center),
      ...(station.ground?.left ?? []).map((s) => sample(s.offsetM, s.z)),
    ];
    const design = cross?.byKey[station.key]?.detail as CrossSection["design"] | undefined;
    return { ...head, ...own, samples, ...(design ? { design } : {}), preview: true };
  });
  const { chainageM, z } = ground.longitudinal;
  return {
    longitudinal: {
      ...saved.longitudinal,
      length_m: chainageM[chainageM.length - 1] ?? 0,
      samples: chainageM.map((chainage, index) => ({
        chainage_m: chainage,
        elevation_m: z[index],
        z: z[index],
        valid: z[index] !== null,
      })),
      stations: sections.map(({ samples: _s, design: _d, preview: _p, ...head }) => head),
      profile_alignment: profile,
    },
    cross_sections: sections,
    balloon_offsets: saved.balloon_offsets,
  };
}