/* =============================================================================
 * M02_DF_Material.ts
 * 검증 칸이 쓰는 재료 찾기 · 이름 · 단가 — 서버 `GET /api/m02/df/materials?q&sub&detail&page&size`
 * → {total, page, size, items}(아직 없으면 M01 재료 찾기로 대신) · 단가는 `cfValues`(재료 ref = 키)
 * 모양은 docs/raw/M01_쉬운단가/흐름도_정함.md 5. 이 폴더째 지워도 됨.
 * ========================================================================== */

import { API_BASE_URL } from "@config/config_frontend";
import { searchElements } from "../../M01_MasterData/M01_MasterData_UI_Logic_Api";
import { cfValues } from "./M02_DF_Api";

export interface CfMat {
  ref: string;
  name: string;
  spec: string;
  unit: string;
}

export interface CfMatPage {
  total: number;
  page: number;
  size: number;
  items: CfMat[];
}

const text = (v: unknown): string =>
  typeof v === "string" || typeof v === "number" ? String(v) : "";

const norm = (it: Record<string, unknown>): CfMat => ({
  ref: text(it.ref ?? it.키),
  name: text(it.이름 ?? it.name),
  spec: text(it.규격 ?? it.spec),
  unit: text(it.단위 ?? it.unit),
});

/** 재료 찾기 — q = 찾는 말 · sub = 구분 · detail = 상세구분 · page 는 1 부터 */
export async function findMaterials(cond: {
  q?: string;
  sub?: string;
  detail?: string;
  page?: number;
  size?: number;
}): Promise<CfMatPage> {
  const page = cond.page ?? 1;
  const size = cond.size ?? 10;
  try {
    const qs = new URLSearchParams({
      q: cond.q ?? "",
      sub: cond.sub ?? "",
      detail: cond.detail ?? "",
      page: String(page),
      size: String(size),
    });
    const r = await fetch(`${API_BASE_URL}/m02/df/materials?${qs.toString()}`, {
      credentials: "include",
    });
    if (r.ok) {
      const d = (await r.json()) as {
        total: number;
        page?: number;
        size?: number;
        items: Record<string, unknown>[];
      };
      return {
        total: d.total,
        page: d.page ?? page,
        size: d.size ?? size,
        items: d.items.map(norm),
      };
    }
  } catch {
    /* 서버 길이 아직 없으면 M01 재료 찾기로 */
  }
  const got = await searchElements("재료", cond.q ?? "");
  const all = got.items.filter((it) => {
    const x = it as unknown as Record<string, unknown>;
    return (!cond.sub || x.구분 === cond.sub) && (!cond.detail || x.상세구분 === cond.detail);
  });
  const from = (page - 1) * size;
  return {
    total: all.length,
    page,
    size,
    items: all.slice(from, from + size).map((it) => norm(it as unknown as Record<string, unknown>)),
  };
}

const names = new Map<string, CfMat | null>();

/** 재료 키 → 이름 · 규격 (한 번 물은 것은 다시 안 물음) */
export async function materialOf(key: string): Promise<CfMat | null> {
  if (!key) return null;
  if (names.has(key)) return names.get(key) ?? null;
  let hit: CfMat | null = null;
  try {
    const got = await searchElements("재료", key);
    const it = got.items.find((x) => x.ref === key);
    hit = it ? norm(it as unknown as Record<string, unknown>) : null;
  } catch {
    hit = null;
  }
  names.set(key, hit);
  return hit;
}

const prices = new Map<string, number | null>();

/** 재료 키 → 단가(원) — 못 구하면 null */
export async function priceOf(key: string): Promise<number | null> {
  if (!key) return null;
  if (prices.has(key)) return prices.get(key) ?? null;
  let v: number | null = null;
  try {
    const a = (await cfValues([{ id: "p", group: "재료", ref: key }]))[0];
    v = a?.ok && typeof a.value === "number" ? a.value : null;
  } catch {
    v = null;
  }
  prices.set(key, v);
  return v;
}