/* =============================================================================
 * M02_MasterTemplete_Hopyo_Side.ts
 * 좌측 「일위대가 실무자료」 컨테이너(PLAN 324-4 · 일위대가 사전조합 아래) — 층 = 구조물 조합 층(화면 층) ·
 * [엑셀 올리기](숨은 file 입력 .xls · .xlsx · 쓰기 권한 없으면 꺼짐) + 파일 줄 → 누르면 본 화면
 * (`M02_MasterTemplete_Hopyo_View`) · 고름 표시 = 본 화면이 메인 칸에 붙어 있는 동안만.
 * ========================================================================== */

import { createButton, el, showToast } from "@ui/ui_template_elements";
import { listHopyo, pageScope, uploadHopyo, type HopyoFile } from "./M02_MasterTemplete_Hopyo_Api";
import { buildHopyoView } from "./M02_MasterTemplete_Hopyo_View";

export const HOPYO_TITLE = "일위대가 실무자료";

export interface HopyoSectionOptions {
  /** 이 층 쓰기 권한 — 없으면 올리기 꺼짐 · 본 화면 확정 · 만들기 없음 */
  canWrite: boolean;
  /** 저장 안 한 고침을 버릴지 확인 — 취소면 false */
  confirmLeave: () => Promise<boolean>;
  /** 메인 칸에 화면을 띄움 */
  show: (label: string, node: HTMLElement) => (dirty: boolean) => void;
  /** 화면을 열었음 — 좌측 다른 고름 표시를 지움 */
  onOpen: () => void;
}

export interface HopyoSection {
  title: string;
  body: HTMLElement;
  /** 다른 화면이 열렸으면 고름 표시를 지움 */
  paint: () => void;
  refresh: () => Promise<void>;
}

const why = (error: unknown): string => (error instanceof Error ? error.message : String(error));

export function buildHopyoSection(opt: HopyoSectionOptions): HopyoSection {
  const scope = pageScope();
  const list = el("div", { className: "m02-side__items ui-sidebar-list" });
  const input = el("input", {
    attrs: { type: "file", accept: ".xls,.xlsx", "data-hopyo-file": "" },
  }) as HTMLInputElement;
  input.hidden = true;
  const upload = createButton({
    label: "엑셀 올리기",
    variant: "filled",
    size: "sm",
    disabled: !opt.canWrite,
    onClick: () => input.click(),
  });
  upload.title = opt.canWrite ? "설계내역서 엑셀(일위대가 시트)" : "이 층 쓰기 권한 없음";
  const body = el("div", {
    className: "m02-hopyo-side",
    children: [el("div", { className: "m02-side__row", children: [upload, input] }), list],
  });
  let files: HopyoFile[] = [];
  let open: { key: string; view: HTMLElement } | null = null;
  let seq = 0;

  input.addEventListener("change", () => {
    const file = input.files?.[0];
    input.value = "";
    if (!file) return;
    upload.disabled = true;
    uploadHopyo(scope, file)
      .then(async (got) => {
        const wrong = got.어긋남 ? ` · 검산 어긋남 ${got.어긋남}` : "";
        showToast(`올림 — 호표 ${got.호표수}${wrong}`, got.어긋남 ? "warning" : "success");
        await refresh();
        await show(got);
      })
      .catch((error) => showToast(why(error), "error"))
      .finally(() => (upload.disabled = !opt.canWrite));
  });

  function paintList(): void {
    list.replaceChildren(
      ...(files.length
        ? files.map((f) => {
            const row = el("button", {
              className: `m02-side__item ui-sidebar-row${open?.key === f.키 ? " is-active" : ""}`,
              text: `${f.파일} · 호표 ${f.호표수}`,
              attrs: { type: "button", title: `${f.키} · ${f.올린때}`, "data-hopyo-key": f.키 },
            });
            row.addEventListener("click", () => void show(f));
            return row;
          })
        : [el("p", { className: "m02-side__empty", text: "올린 실무자료 없음" })]),
    );
  }

  async function show(file: HopyoFile): Promise<void> {
    if (open?.key === file.키 && open.view.isConnected) return;
    if (!(await opt.confirmLeave())) return;
    const view = buildHopyoView(file.키, {
      scope,
      canWrite: opt.canWrite,
      onDeleted: () => {
        view.replaceChildren(el("p", { className: "m02-side__empty", text: "지운 실무자료" }));
        void refresh();
      },
    });
    opt.show(`${HOPYO_TITLE} — ${file.파일}`, view);
    opt.onOpen();
    open = { key: file.키, view };
    paintList();
  }

  async function refresh(): Promise<void> {
    const mine = ++seq;
    try {
      const got = await listHopyo(scope);
      if (mine === seq) files = got;
    } catch (error) {
      if (mine === seq) files = [];
      showToast(why(error), "error");
    }
    if (mine === seq) paintList();
  }

  const paint = (): void => {
    if (open && !open.view.isConnected) {
      open = null;
      paintList();
    }
  };

  void refresh();
  return { title: HOPYO_TITLE, body, paint, refresh };
}