/* =============================================================================
 * B09_Estimation_UI_BillRates.ts
 * 설계내역서 **할증율·일괄보정** 칸 — STmate `wBoqRate`·`wM_Rate` 본 (PLAN 12장 2차 ④)
 *
 *   - 범위: 선택 항목만(줄마다 한 칸) / 내역서 전체(`*`) · 방식: 같은 비율 / 비목별(재·노·경)
 *   - 비목마다 절사·반올림 × 소수 0~4 자리(안 고르면 원 미만 절사).
 *   - ⚠ 여러 줄을 한꺼번에 바꾸므로 「할증 전부 되돌리기」를 둠 — 줄마다 ↺ 도 있음.
 *   - 화면은 고른 값만 보냄 — 금액은 서버가 다시 셈(내역 한 벌을 새로 받음).
 * ========================================================================== */

import { showToast } from "@ui/ui_template_elements";
import { L, el, userMark } from "./B09_Estimation_UI_Sheet";
import { loadEdits, saveEdits, type BillRowDto, type EditChange } from "./B09_Estimation_UI_Store";

const SECTION = "bill_rates";
const PARTS = [
  ["material", "B09_Sheet_Col_Material"],
  ["labor", "B09_Sheet_Col_Labor"],
  ["expense", "B09_Sheet_Col_Expense"],
] as const;

function save(projectId: string, changes: EditChange[], reload: () => void): void {
  if (changes.length === 0) return;
  void saveEdits(projectId, changes)
    .then(() => {
      showToast(L("B09_Sheet_Saved"), "success");
      reload();
    })
    .catch((error: Error) => showToast(`${L("B09_Sheet_SaveFailed")} ${error.message}`, "error"));
}

function numberBox(placeholder: string): HTMLInputElement {
  const input = el("input", "b09s-edit-input");
  input.type = "text";
  input.inputMode = "decimal";
  input.placeholder = placeholder;
  return input;
}

function choice(options: Array<[string, string]>): HTMLSelectElement {
  const select = el("select");
  for (const [value, label] of options) {
    const option = el("option", "", label);
    option.value = value;
    select.append(option);
  }
  return select;
}

/** 할증·일괄보정 칸 한 벌 — `selected` = 고른 줄의 할증 칸 이름. */
export function rateForm(
  projectId: string,
  selected: Set<string>,
  reload: () => void,
): HTMLElement {
  const box = el("div", "b09s-group");
  const scope = choice([
    ["selected", L("B09_Sheet_Rate_Selected")],
    ["all", L("B09_Sheet_Rate_All")],
  ]);
  const way = choice([
    ["same", L("B09_Sheet_Rate_Same")],
    ["parts", L("B09_Sheet_Rate_Parts")],
  ]);
  const same = numberBox("%");
  const parts = PARTS.map(([key, label]) => {
    const rate = numberBox("%");
    const mode = choice([
      ["floor", L("B09_Sheet_Rate_Floor")],
      ["round", L("B09_Sheet_Rate_Round")],
    ]);
    const digits = choice(
      [0, 1, 2, 3, 4].map((n): [string, string] => [
        String(n),
        `${L("B09_Sheet_Rate_Digits")} ${n}`,
      ]),
    );
    const line = el("span", "b09s-inline");
    line.append(el("span", "b09s-head", L(label)), rate, mode, digits);
    return { key, rate, mode, digits, line };
  });

  const apply = el("button", "b09s-undo", L("B09_Sheet_Apply"));
  apply.type = "button";
  apply.addEventListener("click", () => {
    const rounding = Object.fromEntries(
      parts.map((part) => [part.key, { mode: part.mode.value, digits: Number(part.digits.value) }]),
    );
    const value =
      way.value === "same"
        ? { all: same.value.trim() || "0", rounding }
        : {
            ...Object.fromEntries(parts.map((part) => [part.key, part.rate.value.trim() || "0"])),
            rounding,
          };
    const keys = scope.value === "all" ? ["*"] : [...selected];
    if (keys.length === 0) {
      showToast(L("B09_Sheet_Rate_PickRows"), "info");
      return;
    }
    save(
      projectId,
      keys.map((key) => ({ section: SECTION, key, value })),
      reload,
    );
  });

  const clear = el("button", "b09s-undo", L("B09_Sheet_Rate_ClearAll"));
  clear.type = "button";
  clear.addEventListener("click", () => {
    void loadEdits(projectId).then((stored) =>
      save(
        projectId,
        Object.keys(stored.edits[SECTION] ?? {}).map((key) => ({
          section: SECTION,
          key,
          value: null,
        })),
        reload,
      ),
    );
  });

  const head = el("div", "b09s-bar");
  head.append(
    el("span", "b09s-head", L("B09_Sheet_Rate")),
    scope,
    way,
    same,
    apply,
    clear,
    el("span", "b09s-hint", `${L("B09_Sheet_Rate_SelectedCount")} ${selected.size}`),
  );
  const partLine = el("div", "b09s-bar");
  partLine.append(...parts.map((part) => part.line));
  box.append(head, partLine);
  return box;
}

/** 줄 비고의 할증 표시 — 그 줄 칸으로 얹혔으면 「사용자」+↺, 내역서 전체로 얹혔으면 표시만. */
export function rateMark(
  projectId: string,
  row: BillRowDto,
  reload: () => void,
): HTMLElement | null {
  if (!row.rate) return null;
  if (row.rate.source === "*")
    return el("span", "b09s-badge b09s-badge--user", L("B09_Sheet_Rate_AllBadge"));
  return userMark(() =>
    save(projectId, [{ section: SECTION, key: row.rate_key, value: null }], reload),
  );
}