const EstEstimate = (() => {
  let page = 0;
  function usage(project) {
    const sources = new Map();
    for (const row of project.tables.EstiMateDat || []) {
      if (!row.Code) continue;
      const rows = sources.get(row.Code) || [];
      rows.push(row);
      sources.set(row.Code, rows);
    }
    return (project.tables.EstMainDat || []).flatMap((row, index) => {
      if (Number(row.Level) > 0 || Number(row.LinkIndex) !== 101) return [];
      const matches = sources.get(row.Code) || [];
      const source =
        matches.length === 1 ? EstNative.price(structuredClone(matches[0]), 101) : null;
      const appliedPrice =
        row.TU == null
          ? EstMath.units.reduce((sum, field) => sum + EstMath.num(row[field]), 0)
          : EstMath.num(row.TU);
      const sourcePrice = source ? EstMath.num(source.TC) : null;
      const canApply =
        matches.length === 1 && sourcePrice != null && Math.abs(appliedPrice - sourcePrice) > 1e-6;
      return [
        {
          index,
          Code: row.Code || "",
          Name: row.Name || "",
          Size: row.Size || "",
          Unite: row.Unite || "",
          GN: EstMath.num(row.GN),
          appliedPrice,
          sourcePrice,
          difference: source ? appliedPrice - sourcePrice : null,
          TC: EstMath.num(row.TC),
          status: !matches.length ? "연결 없음" : matches.length > 1 ? "코드 중복" : "연결됨",
          canApply,
        },
      ];
    });
  }
  function changes(project) {
    const labels = { new: "신규", deleted: "삭제", changed: "변경", unchanged: "동일" };
    return EstBusiness.changes(project)
      .filter((row) => Number(row.LinkIndex) === 101 || Number(row.originalLinkIndex) === 101)
      .map((row) => ({ ...row, status: labels[row.status] || row.status }));
  }
  function applyRowPrice(project, index) {
    index = Number(index);
    const row = project.tables?.EstMainDat?.[index];
    if (!row || Number(row.Level) > 0 || Number(row.LinkIndex) !== 101)
      throw Error("견적단가 내역 행을 찾을 수 없습니다.");
    const sources = (project.tables?.EstiMateDat || []).filter(
      (s) => s.Code && s.Code === row.Code,
    );
    if (!sources.length) throw Error(`견적단가 원천 자료가 없습니다: ${row.Code}`);
    if (sources.length > 1) throw Error(`견적단가 원천 코드가 중복되었습니다: ${row.Code}`);
    const source = EstNative.price(structuredClone(sources[0]), 101);
    const sourcePrice = EstMath.num(source?.TC);
    if (!Number.isFinite(sourcePrice)) throw Error("기초 단가를 계산할 수 없습니다.");

    // 원천 비목 구성 (NC, GC, JC, SC)
    const baseUnits = EstMath.components.map((comp) => EstMath.num(source[comp]));
    // SCheck 재분류가 설정되어 있는 경우 비목 보존
    const scheck = Number(row.SCheck);
    if (scheck > 0) {
      const targetUnit = { 1: "GU", 2: "NU", 3: "JU" }[scheck];
      for (const u of EstMath.units) row[u] = u === targetUnit ? sourcePrice : 0;
    } else {
      // SCheck === 0 이거나 미지정인 경우 원천 비목 분할 유지 (NU, GU, JU, SU)
      EstMath.units.forEach((u, i) => (row[u] = baseUnits[i]));
    }
    // AutoCalc가 비활성화된 수동계산 모드에서는 기존 금액을 보존하고, 활성화된 경우에만 재계산
    if (project.options?.AutoCalc !== false) {
      EstMath.amounts(row, project.options?.EstDigits || 0, project.options?.TotalFit);
    } else {
      row.TU = EstMath.units.reduce((sum, key) => sum + EstMath.num(row[key]), 0);
    }
  }
  function applyAllPrices(project) {
    const list = usage(project).filter((item) => item.canApply);
    if (!list.length) throw Error("적용할 기초 단가 차이가 없습니다.");
    for (const item of list) applyRowPrice(project, item.index);
    return list.length;
  }
  function render() {
    const { state, esc, number, byId } = EstApp,
      isChange = state.view === "estimate-change",
      rows = isChange ? changes(state.project) : usage(state.project);
    page = Math.max(0, Math.min(page, Math.ceil(rows.length / 100) - 1));
    const visible = rows.slice(page * 100, page * 100 + 100),
      value = (v) => (v == null ? "" : number(v));
    if (isChange) {
      byId("work-content").innerHTML =
        `<div class="business-tools"><b>견적단가 설계변경</b><span>${rows.length}건 · ${page + 1}/${Math.max(1, Math.ceil(rows.length / 100))}쪽</span><button data-estimate-page="-1" ${page === 0 ? "disabled" : ""}>이전</button><button data-estimate-page="1" ${(page + 1) * 100 >= rows.length ? "disabled" : ""}>다음</button></div><table class="sheet"><thead><tr><th>구분</th><th>코드</th><th>품명</th><th>당초 수량</th><th>변경 수량</th><th>당초 금액</th><th>변경 금액</th><th>증감</th><th>작업</th></tr></thead><tbody>${visible.map((row) => `<tr><td>${esc(row.status)}</td><td>${esc(row.Code)}</td><td>${esc(row.Name)}</td><td>${value(row.originalGN)}</td><td>${value(row.GN)}</td><td>${value(row.originalTC)}</td><td>${value(row.TC)}</td><td>${value(row.difference)}</td><td>${row.index == null ? "" : `<button data-estimate-row="${row.index}">내역 열기</button>`}</td></tr>`).join("")}</tbody></table>`;
      return;
    }
    const canApplyCount = rows.filter((r) => r.canApply).length;
    byId("work-content").innerHTML =
      `<div class="business-tools"><b>견적단가 사용 내역</b><span>${rows.length}건 · ${page + 1}/${Math.max(1, Math.ceil(rows.length / 100))}쪽</span><button data-estimate-page="-1" ${page === 0 ? "disabled" : ""}>이전</button><button data-estimate-page="1" ${(page + 1) * 100 >= rows.length ? "disabled" : ""}>다음</button><button data-estimate-apply-all ${canApplyCount ? "" : "disabled"}>기초단가 일괄 적용 (${canApplyCount}건)</button></div><p>내역에 적용된 단가와 현재 견적단가 자료를 비교합니다.</p><table class="sheet"><thead><tr><th>코드</th><th>품명</th><th>규격</th><th>단위</th><th>수량</th><th>내역 단가</th><th>기초 단가</th><th>차이</th><th>금액</th><th>연결</th><th>작업</th></tr></thead><tbody>${visible.map((row) => `<tr><td>${esc(row.Code)}</td><td>${esc(row.Name)}</td><td>${esc(row.Size)}</td><td>${esc(row.Unite)}</td><td>${value(row.GN)}</td><td>${value(row.appliedPrice)}</td><td>${value(row.sourcePrice)}</td><td>${value(row.difference)}</td><td>${value(row.TC)}</td><td>${esc(row.status)}</td><td><button data-estimate-row="${row.index}">내역 열기</button>${row.canApply ? ` <button data-estimate-apply-row="${row.index}">단가 적용</button>` : ""}</td></tr>`).join("")}</tbody></table>`;
  }
  function install() {
    document.addEventListener("click", (event) => {
      const applyAll = event.target.closest("[data-estimate-apply-all]");
      if (applyAll) {
        try {
          EstApp.change((p) => {
            const count = applyAllPrices(p);
            EstApp.state.notice = `견적단가 ${count}건의 기초단가를 일괄 적용했습니다.`;
          });
        } catch (err) {
          EstApp.state.notice = err.message;
          EstApp.render();
        }
        return;
      }
      const applyRow = event.target.closest("[data-estimate-apply-row]");
      if (applyRow) {
        const index = Number(applyRow.dataset.estimateApplyRow);
        try {
          EstApp.change((p) => {
            applyRowPrice(p, index);
            EstApp.state.notice = `행 ${index + 1}에 기초단가를 적용했습니다.`;
          });
        } catch (err) {
          EstApp.state.notice = err.message;
          EstApp.render();
        }
        return;
      }
      const step = event.target.closest("[data-estimate-page]");
      if (step) {
        page += Number(step.dataset.estimatePage);
        render();
        return;
      }
      const node = event.target.closest("[data-estimate-row]");
      if (!node) return;
      const index = Number(node.dataset.estimateRow);
      if (!EstApp.state.project.tables.EstMainDat[index]) return;
      EstApp.navigate("EstMainDat");
      EstApp.state.page = Math.floor(index / 100);
      EstApp.state.selection = new Set([index]);
      EstApp.render();
    });
  }
  return { usage, changes, render, install, applyRowPrice, applyAllPrices };
})();