/* =============================================================================
 * B09_Estimation_Calc_Total.ts
 * B09 총괄설계내역서 · 공사원가계산서 셈(PLAN 145-4) — 화면 짝.
 *
 * ⚠ 짝 = `B09_Estimation_Calc_Total.py`(같은 식 · 같은 차례 · 같은 끝수) — 한쪽을 고치면 다른 쪽도 ·
 *   거울 시험 `resources/tester/test_145_4_b09_total_calc.py`.
 *   조작 중은 이 파일이 바로 셈 · [저장] 때 서버가 파이썬 짝으로 정본을 다시 셈.
 *
 * 입력 sums = 설계내역서 비목 합(145-3 `sheets.bill.sums`) · estimate = 사용자 값(`user.estimate`)
 * 식 · 끝수 = 엑셀 총괄 49~67 그대로 · 빈칸 규칙 = 파이썬 짝 머리 글 그대로.
 * ========================================================================== */

import { num, rounddown, roundup, total, type Row } from "./B09_Estimation_Calc_Base";

type Num = number | null;

/** 제비율 줄 [키, 이름, M01 요율 후보 키, 산식 글] — 엑셀 총괄 49~58 차례 · 나.소계에 듦 */
export const RATE_LINES: Array<[string, string, string, string]> = [
  ["indirect_labor", "간접노무비", "RT000008", "직접노무비 × 율"],
  ["accident", "산재보험료", "RT000001", "(직접노무비 + 간접노무비) × 율"],
  ["employment", "고용보험료", "RT000002", "(직접노무비 + 간접노무비) × 율"],
  ["health", "건강보험료", "RT000003", "직접노무비 × 율"],
  ["care", "노인장기요양보험료", "RT000005", "건강보험료 × 율"],
  ["pension", "연금보험료", "RT000004", "직접노무비 × 율"],
  ["safety", "산업안전보건관리비", "RT000006", "A · B 중 작은 쪽 + 기초액"],
  ["other", "기타경비", "RT000009", "(직접노무비 + 간접노무비 + 재료비) × 율"],
  ["environment", "환경보전비", "RT000010", "순공사비 × 율"],
  ["machine", "건설기계대여금지급보증", "RT000015", "순공사비 × 율"],
];
/** 엑셀에 없는 현행 비목 — 줄만 두고 빈칸 */
export const CURRENT_ONLY: Array<[string, string, string]> = [
  ["retirement", "퇴직공제부금비", "RT000011"],
  ["wage_claim", "임금채권보장분담금", "RT000012"],
  ["asbestos", "석면피해구제분담금", "RT000013"],
  ["subcontract", "하도급대금지급보증수수료", "RT000014"],
  ["performance", "공사이행보증수수료", "RT000016"],
];
/** 소계 아래 줄 */
export const TAIL_LINES: Array<[string, string, string, string]> = [
  ["overhead", "일반관리비", "RT000017", "나.소계 × 율"],
  ["profit", "이윤", "RT000018", "(다.소계 − 재료비) × 율 − 보정"],
  ["vat", "부가가치세", "RT000019", "공급가액 × 율 + 조정"],
];
const SAFETY_VAT_DIVISOR = 1.1;
const SAFETY_B = 1.2;

/** ROUNDDOWN(밑수 × 율 ÷ 100, 0) — 둘 중 빈칸이면 빈칸 */
const pct = (base: Num, rate: Num): Num =>
  base === null || rate === null ? null : rounddown((base * rate) / 100);

/** 조달수수료 = ROUNDDOWN(관급 순자재대 × 율 ÷ 100, 0) */
export const procurementFee = (net: Num, rate: Num): Num => pct(net, rate);

export function computeTotal(sums: Row | null | undefined, estimate: Row | null | undefined): Row {
  const s: Row = sums && typeof sums === "object" ? sums : {};
  const est: Row = estimate && typeof estimate === "object" ? estimate : {};
  const ratesIn: Row = est.rates && typeof est.rates === "object" ? est.rates : {};
  const rate: Record<string, Num> = {};
  for (const [key] of [...RATE_LINES, ...TAIL_LINES]) rate[key] = num(ratesIn[key]);
  const hand = (key: string): number => num(est[key]) || 0;

  const material = num(s.material);
  const labor = num(s.labor);
  const expense = num(s.expense);
  const supplyNet = num(s.supply_net);
  const direct = total([material, labor, expense]);

  const line: Record<string, Num> = {};
  line.indirect_labor = pct(labor, rate.indirect_labor);
  const totalLabor = total([labor, line.indirect_labor]);
  line.accident = pct(totalLabor, rate.accident);
  line.employment = pct(totalLabor, rate.employment);
  line.health = pct(labor, rate.health);
  line.care = pct(line.health, rate.care);
  line.pension = pct(labor, rate.pension);
  let safetyA: Num = null;
  let safetyB: Num = null;
  const laborMaterial = total([labor, material]);
  if (laborMaterial !== null && rate.safety !== null) {
    const base = hand("safety_base");
    const target = laborMaterial + (supplyNet ?? 0) / SAFETY_VAT_DIVISOR;
    safetyA = rounddown((target * rate.safety) / 100 + base);
    safetyB = rounddown(((laborMaterial * rate.safety) / 100 + base) * SAFETY_B);
  }
  line.safety = safetyA === null || safetyB === null ? null : Math.min(safetyA, safetyB);
  line.other = pct(total([labor, line.indirect_labor, material]), rate.other);
  line.environment = pct(direct, rate.environment);
  line.machine = pct(direct, rate.machine);
  const netCost = total([direct, ...RATE_LINES.map(([key]) => line[key])]);
  line.overhead = pct(netCost, rate.overhead);
  const da = total([netCost, line.overhead]);
  const profitRaw = pct(da === null || material === null ? null : da - material, rate.profit);
  line.profit = profitRaw === null ? null : profitRaw - hand("profit_adjust");
  const supplyPrice = total([da, line.profit]);
  const vat = pct(supplyPrice, rate.vat);
  line.vat = vat === null ? null : vat + hand("vat_adjust");
  const contract = total([supplyPrice, line.vat]);
  const fee = supplyNet === 0 ? 0 : procurementFee(supplyNet, num(est.procurement_fee_pct));
  const supplyRaw = total([supplyNet, fee]);
  line.supply = supplyRaw === null ? null : roundup(supplyRaw, -3);
  const grand = total([contract, line.supply]);

  const indirectMaterial = hand("indirect_material");
  const scrap = hand("scrap");
  const cost: Record<string, Num> = {
    direct_material: material === null ? null : material - indirectMaterial + scrap,
    indirect_material: indirectMaterial,
    scrap,
    material,
    direct_labor: labor,
    indirect_labor: line.indirect_labor,
    labor: totalLabor,
    expense,
    accident: line.accident,
    employment: line.employment,
    health: line.health,
    care: line.care,
    pension: line.pension,
    safety: line.safety,
    other: line.other,
    environment: line.environment,
    machine: line.machine,
    expense_sum: total([
      expense,
      ...RATE_LINES.filter(([key]) => key !== "indirect_labor").map(([key]) => line[key]),
    ]),
    overhead: line.overhead,
    profit: line.profit,
    supply_price: supplyPrice,
    vat: line.vat,
    contract,
    supply: line.supply,
    grand,
  };
  const share: Record<string, Num> = {};
  for (const [key, value] of Object.entries(cost))
    share[key] = value === null || !grand ? null : (value / grand) * 100;
  return {
    sums: { material, labor, expense, direct },
    lines: line,
    subtotals: { net_cost: netCost, da, supply_price: supplyPrice, contract, grand },
    safety: { a: safetyA, b: safetyB },
    profit_raw: profitRaw,
    supply: { net: supplyNet, fee, raw: supplyRaw },
    cost,
    share,
  };
}