/* =============================================================================
 * B08_Quantity_UI_Earthwork.ts
 * 3탭 토적표(PLAN 61-3) — 줄 = 측점 · 열 = 옛 토적 엔진 출력 칸 그대로 · 맨 아래 합계 줄.
 *
 *   GET …/quantity/earthwork (서버 단독 · 읽기만) — 평균단면적법 · 보정량 = 입적 × 다짐 환산계수
 *   절토 암은 그 측점이 센 갈래(`cut_rock_kind`)대로 리핑암 · 발파암 열에 놓음.
 *   표 모양은 1탭 집계표 것(`b08-summary__*`)을 다시 씀.
 * ========================================================================== */

import { API_BASE_URL } from "@config/config_frontend";
import { stationLabel } from "../common_util/common_util_station";
import { stationInterval } from "./B08_Quantity_UI_Summary";

interface EarthworkRow {
  chainage_m: number;
  distance_m: number;
  cut_soil_area_m2: number;
  cut_soil_volume_m3: number;
  cut_soil_adjusted_m3: number;
  cut_rock_area_m2: number;
  cut_rock_volume_m3: number;
  cut_rock_adjusted_m3: number;
  cut_rock_kind: string;
  ditch_soil_area_m2: number;
  ditch_soil_volume_m3: number;
  ditch_soil_adjusted_m3: number;
  ditch_rock_area_m2: number;
  ditch_rock_volume_m3: number;
  ditch_rock_adjusted_m3: number;
  adjusted_total_m3: number;
  fill_area_m2: number;
  fill_volume_m3: number;
  diverted_m3: number;
  balance_m3: number;
  cumulative_m3: number;
  notes: string[];
}

interface EarthworkTable {
  rows: EarthworkRow[];
  totals: Record<string, number>;
  conversion_factors: Record<string, { compacted: number }>;
  station_count: number;
  route_id: number;
  confirmed: boolean;
}

const ROCKS = ["ripping_rock", "blasting_rock"] as const;
const GROUPS: Array<[string, number]> = [
  ["절토 토사", 3],
  ["절토 리핑암", 3],
  ["절토 발파암", 3],
  ["측구터파기 토사", 3],
  ["측구터파기 암", 3],
];
const TRIPLE = ["단면적", "입적", "보정량"];

const num = (value: number | undefined | null): string =>
  value == null || !Number.isFinite(value) ? "" : value.toFixed(2);

function cell(tag: "th" | "td", text: string, span?: { row?: number; col?: number }) {
  const node = document.createElement(tag);
  node.textContent = text;
  if (span?.row) node.rowSpan = span.row;
  if (span?.col) node.colSpan = span.col;
  return node;
}

function note(text: string): HTMLElement {
  const p = document.createElement("p");
  p.className = "ui-general-block__empty";
  p.textContent = text;
  return p;
}

function head(): HTMLTableSectionElement {
  const top = document.createElement("tr");
  top.append(cell("th", "측점", { row: 2 }), cell("th", "거리", { row: 2 }));
  for (const [label, span] of GROUPS) top.append(cell("th", label, { col: span }));
  top.append(
    cell("th", "보정량계", { row: 2 }),
    cell("th", "성토", { col: 2 }),
    cell("th", "유용토", { row: 2 }),
    cell("th", "차인토량", { row: 2 }),
    cell("th", "누가토량", { row: 2 }),
  );
  top.firstElementChild?.classList.add("b08-summary__station");
  const sub = document.createElement("tr");
  for (const _ of GROUPS) sub.append(...TRIPLE.map((t) => cell("th", t)));
  sub.append(cell("th", "단면적"), cell("th", "입적"));
  const thead = document.createElement("thead");
  thead.append(top, sub);
  return thead;
}

/** 절토 암 세 칸 — 그 측점 갈래 열에만 · 다른 갈래 열은 빈 칸 */
function rockCells(row: EarthworkRow, kind: string): string[] {
  return row.cut_rock_kind === kind
    ? [num(row.cut_rock_area_m2), num(row.cut_rock_volume_m3), num(row.cut_rock_adjusted_m3)]
    : ["", "", ""];
}

function bodyRow(row: EarthworkRow, interval: number): HTMLTableRowElement {
  const tr = document.createElement("tr");
  tr.dataset.b08Earthwork = String(row.chainage_m);
  const station = cell(
    "th",
    stationLabel(row.chainage_m, interval) + (row.notes.length ? " *" : ""),
  );
  station.className = "b08-summary__station";
  if (row.notes.length) station.title = row.notes.join("\n");
  const values = [
    num(row.distance_m),
    num(row.cut_soil_area_m2),
    num(row.cut_soil_volume_m3),
    num(row.cut_soil_adjusted_m3),
    ...ROCKS.flatMap((kind) => rockCells(row, kind)),
    num(row.ditch_soil_area_m2),
    num(row.ditch_soil_volume_m3),
    num(row.ditch_soil_adjusted_m3),
    num(row.ditch_rock_area_m2),
    num(row.ditch_rock_volume_m3),
    num(row.ditch_rock_adjusted_m3),
    num(row.adjusted_total_m3),
    num(row.fill_area_m2),
    num(row.fill_volume_m3),
    num(row.diverted_m3),
    num(row.balance_m3),
    num(row.cumulative_m3),
  ];
  tr.append(station, ...values.map((v) => cell("td", v)));
  return tr;
}

/** 합계 줄 — 단면적은 합이 뜻이 없어 비움(옛 엔진 `totals` 와 같음) · 누가토량 = 마지막 줄 */
function totalRow(table: EarthworkTable): HTMLTableRowElement {
  const t = table.totals;
  const last = table.rows[table.rows.length - 1];
  const values = [
    num(t.distance_m),
    "",
    num(t.cut_soil_volume_m3),
    num(t.cut_soil_adjusted_m3),
    ...ROCKS.flatMap((kind) => [
      "",
      num(t[`cut_${kind}_volume_m3`]),
      num(t[`cut_${kind}_adjusted_m3`]),
    ]),
    "",
    num(t.ditch_soil_volume_m3),
    num(t.ditch_soil_adjusted_m3),
    "",
    num(t.ditch_rock_volume_m3),
    num(t.ditch_rock_adjusted_m3),
    num(t.adjusted_total_m3),
    "",
    num(t.fill_volume_m3),
    num(t.diverted_m3),
    num(t.balance_m3),
    num(last?.cumulative_m3),
  ];
  const tr = document.createElement("tr");
  tr.className = "b08-earthwork__total";
  tr.dataset.b08EarthworkTotal = "";
  const label = cell("th", "합계");
  label.className = "b08-summary__station";
  tr.append(label, ...values.map((v) => cell("td", v)));
  return tr;
}

export async function renderEarthwork(host: HTMLElement, projectId: string): Promise<void> {
  host.replaceChildren(note("토적표를 만드는 중…"));
  let table: EarthworkTable;
  let interval = 20;
  try {
    const [response, gap] = await Promise.all([
      fetch(`${API_BASE_URL}/projects/${projectId}/quantity/earthwork`, { credentials: "include" }),
      stationInterval(projectId).catch(() => 20),
    ]);
    const body = (await response.json().catch(() => null)) as
      (EarthworkTable & { detail?: unknown }) | null;
    if (!response.ok || !body) {
      const detail = body?.detail;
      throw new Error(typeof detail === "string" ? detail : `HTTP ${response.status}`);
    }
    table = body;
    interval = gap;
  } catch (error) {
    host.replaceChildren(note(`토적표를 불러오지 못했습니다 — ${String(error)}`));
    return;
  }
  if (!table.rows.length) {
    host.replaceChildren(note("측점 단면적이 아직 없습니다 — 횡단 설계를 먼저 마치세요."));
    return;
  }
  const c = (kind: string): string => num(table.conversion_factors[kind]?.compacted);
  const info = note(
    `평균단면적법 · 노선 ${table.route_id}${table.confirmed ? "(확정)" : "(확정 전 최신 노선)"} · ` +
      `측점 ${table.station_count} · 다짐 환산계수 토사 ${c("soil")} · 리핑암 ${c("ripping_rock")} · ` +
      `발파암 ${c("blasting_rock")} · 단위 ㎡ · ㎥ · * = 사유 있음(마우스를 올림)`,
  );
  const tbody = document.createElement("tbody");
  tbody.append(...table.rows.map((row) => bodyRow(row, interval)));
  const tfoot = document.createElement("tfoot");
  tfoot.append(totalRow(table));
  const el = document.createElement("table");
  el.className = "ui-general-block__table b08-summary__table b08-earthwork__table";
  el.dataset.b08Earthwork = "table";
  el.append(head(), tbody, tfoot);
  const wrap = document.createElement("div");
  wrap.className = "ui-general-block__table-wrap b08-summary__wrap";
  wrap.append(el);
  host.replaceChildren(info, wrap);
}