/* =============================================================================
 * B09_Estimation_UI_DetailEdit.ts
 * 호표 본표 **편집** — 일위대가 구성행 수정(`wM_Edit_iLWi`) · 단가산출 Q 식 편집(`wM_Edit_San`) (PLAN 12장 2차)
 *
 *   - 전부 프로젝트 단위(브레인 판정) — 칸 하나 고칠 때마다 서버에 고친 값만 보내고, 금액은 서버가 다시 셈.
 *   - 줄마다: 수량 칸 · ✕(줄 빼기) · D 의 기계 줄은 Q 식 칸 · 고친 줄 = 「사용자」 + ↺(계산값으로).
 *   - 아래: 줄 더하기 — 단가표 고르개(이름으로 찾기) + 수량.
 *   - ⚠ 화면이 값을 만들지 않음 — 입력한 글을 그대로 보내고, 받을 수 없는 값은 서버가 까닭과 함께 거절.
 * ========================================================================== */

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

/** 서버가 줄마다 붙이는 고친 값 표시. */
export interface RowEditDto {
  key: string;
  user: boolean;
  removed?: boolean;
  added?: boolean;
  was_quantity?: string;
  output?: string;
  q_formula?: string;
}

interface SearchRowDto {
  code: string;
  name: string;
  spec: string;
  unit: string;
  kind_label: string;
}

export const ROWS_SECTION = "sheet_rows";
export const Q_SECTION = "price_basis_q";

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

/** 수량 칸 — Enter·칸 나가기에 보냄(바뀐 때만). */
export function quantityInput(
  projectId: string,
  edit: RowEditDto,
  quantity: string,
  reload: () => void,
): HTMLElement {
  const input = el("input", "b09s-edit-input");
  input.type = "text";
  input.inputMode = "decimal";
  input.value = quantity;
  const send = (): void => {
    const text = input.value.trim();
    if (text === quantity) return;
    save(projectId, [{ section: ROWS_SECTION, key: edit.key, value: { quantity: text } }], reload);
  };
  input.addEventListener("click", (event) => event.stopPropagation());
  input.addEventListener("keydown", (event) => {
    if (event.key === "Enter") input.blur();
  });
  input.addEventListener("change", send);
  return input;
}

/** 줄 끝 조작 — ✕(빼기) · 고친 줄이면 「사용자」 + ↺. */
export function rowControls(
  projectId: string,
  edit: RowEditDto,
  reload: () => void,
  editing: boolean,
): HTMLElement {
  const box = el("span", "b09s-inline");
  if (editing && !edit.removed && !edit.added) {
    const remove = el("button", "b09s-undo", "✕");
    remove.type = "button";
    remove.title = L("B09_Sheet_RemoveRow");
    remove.addEventListener("click", (event) => {
      event.stopPropagation();
      save(projectId, [{ section: ROWS_SECTION, key: edit.key, value: { removed: true } }], reload);
    });
    box.append(remove);
  }
  if (edit.user) {
    box.append(
      userMark(() =>
        save(projectId, [{ section: ROWS_SECTION, key: edit.key, value: null }], reload),
      ),
    );
  }
  return box;
}

/** D 기계 줄의 Q 식 칸 — 식을 글로 넣으면 서버가 셈 → 소수 2자리 확정 → 줄 수량 = 몫 ÷ Q. */
export function qFormulaInput(
  projectId: string,
  edit: RowEditDto,
  reload: () => void,
): HTMLElement {
  const box = el("div", "b09s-inline");
  const input = el("input", "b09s-edit-input b09s-edit-formula");
  input.type = "text";
  input.placeholder = `Q = ${edit.output ?? ""}`;
  input.value = edit.q_formula ?? "";
  input.addEventListener("click", (event) => event.stopPropagation());
  input.addEventListener("keydown", (event) => {
    if (event.key === "Enter") input.blur();
  });
  input.addEventListener("change", () => {
    const text = input.value.trim();
    const value = text ? { q_formula: text } : null;
    save(projectId, [{ section: Q_SECTION, key: edit.key, value }], reload);
  });
  box.append(el("span", "b09s-head", "Q"), input);
  if (edit.q_formula) {
    box.append(
      userMark(() => save(projectId, [{ section: Q_SECTION, key: edit.key, value: null }], reload)),
    );
  }
  return box;
}

/** 줄 더하기 — 단가표에서 이름으로 찾아 고르고 수량을 넣음. */
export function addRowForm(
  projectId: string,
  code: string,
  nextKey: string,
  reload: () => void,
): HTMLElement {
  const box = el("div", "b09s-bar");
  const search = el("input", "b09s-edit-input b09s-edit-formula");
  search.type = "text";
  search.placeholder = L("B09_Sheet_SearchTitle");
  const pick = el("select");
  const amount = el("input", "b09s-edit-input");
  amount.type = "text";
  amount.inputMode = "decimal";
  amount.placeholder = L("B09_Sheet_Col_Quantity");
  const add = el("button", "b09s-undo", L("B09_Sheet_AddRow"));
  add.type = "button";
  let timer = 0;
  search.addEventListener("input", () => {
    window.clearTimeout(timer);
    timer = window.setTimeout(() => {
      const query = search.value.trim();
      if (!query) return;
      void fetch(
        `${API_BASE_URL}/projects/${encodeURIComponent(projectId)}/estimation/edits/search?q=${encodeURIComponent(query)}&parent=${encodeURIComponent(code)}`,
        { credentials: "include" },
      )
        .then((response) => response.json() as Promise<{ rows: SearchRowDto[] }>)
        .then((data) => {
          pick.replaceChildren(
            ...data.rows.map((row) => {
              const option = el(
                "option",
                "",
                `[${row.kind_label}] ${row.name} ${row.spec} (${row.unit})`.trim(),
              );
              option.value = row.code;
              return option;
            }),
          );
        })
        .catch(() => pick.replaceChildren());
    }, 250);
  });
  add.addEventListener("click", () => {
    if (!pick.value || !amount.value.trim()) return;
    save(
      projectId,
      [
        {
          section: ROWS_SECTION,
          key: nextKey,
          value: { ref: pick.value, quantity: amount.value.trim() },
        },
      ],
      reload,
    );
  });
  box.append(el("span", "b09s-head", L("B09_Sheet_AddRow")), search, pick, amount, add);
  return box;
}