/* =============================================================================
 * common_util/common_util_structure_attach.ts
 * 형상 얹기 한 벌(323-4) — 측점(횡단) + 현황(관 · 구조물) + 구조물 표 → 그 측점 그림 자료.
 *
 * 구조물 열쇠(`SHAPE_KEYS` · 빈칸 경고 `blank`)를 걷고 서버와 같은 차례로 다시 얹음 — 관 세트 → 벽 →
 * 포장 → 맹암거 → 빈칸 경고. 고르기 = 표 형상(322-1). 화면은 초안 ?? 저장분 현황으로 이것 하나를 씀
 * (`B06_Section_Section_Drafts.withDraftShapes`) — 저장 전 그림 = 저장 뒤 그림.
 * 파이썬 짝 = `B06_Section/B06_Section_Engine_Attach.py` `attach_shapes`(서버 상세 읽기 · 재생성 응답) ·
 * 거울 시험 = `resources/tester/test_323_4_attach_mirror.py`.
 * ========================================================================== */

import {
  attachCulvertSets,
  buildCulvertSets,
  registryDefaults,
  type CulvertPipePoint,
} from "./common_util_culvert_sets";
import {
  attachWallSpecs,
  wallSpecsFrom,
  type WallStructureInput,
} from "./common_util_structure_walls";
import {
  attachPavementSpecs,
  pavementSpecsFrom,
  type PavementStructureInput,
} from "./common_util_structure_pavement";
import {
  attachUnderdrainSpecs,
  underdrainSpecsFrom,
  type UnderdrainInput,
} from "./common_util_structure_underdrain";
import { catalogRow, fieldName } from "./common_util_structure_catalog";
import {
  blankKeys,
  planStations,
  SAME_STATION_M,
  type PlanPipe,
  type PlanStructure,
  type PlanType,
} from "./common_util_structure_station";
import { SHAPE_KEYS } from "./common_util_structure_shape_keys";

export { SHAPE_KEYS };

export interface AttachType extends PlanType {
  name: string;
  options: ReadonlyArray<{ key: string; label?: string; default: unknown }>;
}

/** 빈 필수 칸 → 「종류 이름 칸 이름」(칸 이름 = 그 종류 정의 → 다른 종류 정의 → 부품 상자 → 키). */
function blankLabels(
  typeId: string,
  options: Record<string, unknown> | null | undefined,
  types: ReadonlyArray<AttachType>,
): string[] {
  const name = catalogRow(typeId)?.name ?? typeId;
  const ordered = [...types.filter((t) => t.type_id === typeId), ...types];
  return blankKeys(typeId, options).map((key) => {
    const option = ordered.flatMap((t) => t.options).find((o) => o.key === key);
    return `${name} ${option?.label ?? fieldName(key) ?? key}`;
  });
}

/** 빈칸 경고 — 측점 계획 자리마다 덮는 관 · 구조물의 빈 필수 칸(파이썬 `_attach_blanks` 짝). */
function attachBlanks(
  sections: Array<Record<string, unknown>>,
  pipes: ReadonlyArray<PlanPipe>,
  structures: ReadonlyArray<PlanStructure>,
  types: ReadonlyArray<AttachType>,
): void {
  const owners = new Map<string, [string, Record<string, unknown> | null | undefined]>();
  for (const pipe of pipes)
    owners.set(pipe.id ?? `pipe-${pipe.chainage_m.toFixed(2)}`, [
      pipe.facility ?? "pipe",
      pipe.options,
    ]);
  for (const item of structures)
    if (item.structure_id) owners.set(item.structure_id, [item.type_id, item.options]);
  for (const station of planStations(pipes, structures, types)) {
    if (!station.blank.length) continue;
    const labels = [
      ...new Set(
        station.owners.flatMap((owner) => {
          const hit = owners.get(owner);
          return hit ? blankLabels(hit[0], hit[1], types) : [];
        }),
      ),
    ];
    for (const section of sections)
      if (Math.abs(Number(section.chainage_m) - station.chainage_m) < SAME_STATION_M)
        section.blank = labels;
  }
}

/** 안 얹은 관 · 시설 누가거리(458) — 시종점 밖으로 밀림 · 주인 측점이 0.51 m 넘게 멂. */
export interface AttachMisses {
  outside: number[];
  far: number[];
}

/** 주인 측점 거리 상한(m) — `design_selection.PIPE_MATCH_M` · 파이썬 `PIPE_MATCH_M` 짝. */
const PIPE_MATCH_M = 0.51;

/** 시종점 밖으로 밀린 관인가(458) — 시종점 측점 자리인데 좌표가 노선 진행 반대쪽으로 0.51 m 넘게 바깥
 *  (따라감이 누가거리를 0 · 끝에 붙여 둠 · 옆 거리는 안 봄 · 좌표 없으면 아님 · 파이썬 `_outside_route` 짝). */
function outsideRoute(
  pipe: { chainage_m: number; x?: number | null; y?: number | null },
  sections: ReadonlyArray<Record<string, unknown>>,
): boolean {
  const placed = sections
    .filter((s) => [s.chainage_m, s.center_x, s.center_y].every(Number.isFinite))
    .sort((a, b) => Number(a.chainage_m) - Number(b.chainage_m));
  if (placed.length < 2 || !Number.isFinite(pipe.x) || !Number.isFinite(pipe.y)) return false;
  const ends: Array<[Record<string, unknown>, Record<string, unknown>]> = [
    [placed[0], placed[1]],
    [placed[placed.length - 1], placed[placed.length - 2]],
  ];
  return ends.some(([end, next]) => {
    if (Math.abs(Number(end.chainage_m) - pipe.chainage_m) >= PIPE_MATCH_M) return false;
    const [ex, ey] = [Number(end.center_x), Number(end.center_y)];
    const [dx, dy] = [Number(next.center_x) - ex, Number(next.center_y) - ey];
    const span = Math.hypot(dx, dy);
    return span > 0 && ((pipe.x! - ex) * dx + (pipe.y! - ey) * dy) / span <= -PIPE_MATCH_M;
  });
}

/** 측점마다 그림 자료를 걷고 현황으로 다시 얹음(파이썬 `attach_shapes` 짝 · 제자리 고침) ·
 *  시종점 밖 관 · 주인 측점 먼 관은 안 얹고 돌려줌(458 · 경고는 부르는 쪽). */
export function attachShapes(
  sections: Array<Record<string, unknown>>,
  allPipes: ReadonlyArray<PlanPipe>,
  structures: ReadonlyArray<PlanStructure>,
  types: ReadonlyArray<AttachType>,
): AttachMisses {
  for (const section of sections) for (const key of [...SHAPE_KEYS, "blank"]) delete section[key];
  const misses: AttachMisses = { outside: [], far: [] };
  const pipes = allPipes.filter((pipe) => {
    const out = outsideRoute(pipe as Parameters<typeof outsideRoute>[0], sections);
    if (out) misses.outside.push(pipe.chainage_m);
    return !out;
  });
  const registry = registryDefaults(types);
  attachCulvertSets(
    sections,
    buildCulvertSets(pipes as readonly CulvertPipePoint[], registry),
    misses.far,
  );
  const shaped = (shape: string) => types.filter((t) => catalogRow(t.type_id)?.shape === shape);
  // 관 세트가 선 측점은 벽을 안 얹음(`attachWallSpecs`) — 차례 = 서버와 같음
  attachWallSpecs(
    sections,
    wallSpecsFrom(
      structures as unknown as WallStructureInput[],
      new Map(shaped("wall").map((t) => [t.type_id, t.name] as const)),
    ),
  );
  attachPavementSpecs(
    sections,
    pavementSpecsFrom(
      structures as unknown as PavementStructureInput[],
      new Set(shaped("pavement").map((t) => t.type_id)),
    ),
  );
  attachUnderdrainSpecs(sections, underdrainSpecsFrom(structures as UnderdrainInput[]));
  attachBlanks(sections, pipes, structures, types);
  return misses;
}