"use client";

import React, { useEffect, useRef, useState } from "react";
import {
  Box,
  Stack,
  Typography,
  FormControl,
  InputLabel,
  Select,
  MenuItem,
  CircularProgress,
  Paper,
  Table,
  TableHead,
  TableRow,
  TableCell,
  TableBody,
  Button,
  TextField,
  Checkbox,
  FormControlLabel,
  IconButton,
  Grid,
} from "@mui/material";
import type { BomCombo, BomDetailResponse, BomStatus } from "@/app/api/bom";
import {
  editBomClient,
  saveBomAsNewVersionClient,
  fetchBomComboClient,
  fetchBomVersionsClient,
  fetchBomDetailClient,
  fetchAllEquipmentsMasterClient,
  fetchAllProcessesMasterClient,
  downloadBomDetailExcelClient,
  type EquipmentMasterRow,
  type ProcessMasterRow,
} from "@/app/api/bom/client";
import { useTranslation } from "react-i18next";
import SearchBox, { Criterion } from "../SearchBox";
import { useMemo, useCallback } from "react";
import AddIcon from "@mui/icons-material/Add";
import SaveIcon from "@mui/icons-material/Save";
import CancelIcon from "@mui/icons-material/Cancel";
import DeleteIcon from "@mui/icons-material/Delete";
import EditIcon from "@mui/icons-material/Edit";
import { BomBasicInfoSection, type BomBasicInfoSectionHandle, saveBasicInfoDraft } from "./BomBasicInfoSection";
import { BomVersionControlBar } from "./BomVersionControlBar";
import {
  BomMaterialEditPanel,
  type BomMaterialEditPanelHandle,
} from "./BomMaterialEditPanel";
import {
  BomProcessEditPanel,
  type BomProcessEditPanelHandle,
} from "./BomProcessEditPanel";
import { getAmbiguousBomMatches, pickDefaultBom } from "./bomVersionUtils";
import { materialVersionLinesFromDetail } from "./bomVersionSaveUtils";

/** 以 description + "-" + name 對應 code，或同一筆設備的 description+name。 */
function resolveEquipmentCode(
  list: EquipmentMasterRow[],
  description: string,
  name: string,
): string | null {
  const d = description.trim();
  const n = name.trim();
  if (!d && !n) return null;
  if (!d || !n) return null;
  const composite = `${d}-${n}`;
  const byCode = list.find((e) => e.code === composite);
  if (byCode) return byCode.code;
  const byPair = list.find(
    (e) => e.description === d && e.name === n,
  );
  return byPair?.code ?? null;
}

/** Full BOM field edit (materials/processes) — hidden until re-enabled. */
const SHOW_BOM_FULL_EDIT = false;

type BomSearchKey = "code" | "name";
type BomSearchInputs = Record<BomSearchKey | `${BomSearchKey}To`, string>;

const EMPTY_BOM_SEARCH_INPUTS: BomSearchInputs = {
  code: "",
  name: "",
  codeTo: "",
  nameTo: "",
};

/** FP-MTMS Version Checklist | Functions Ref. No. 16 | v1.0.0 | 2026-07-16 */
const ImportBomDetailTab: React.FC = () => {
    const { t } = useTranslation(["importBom", "common"]);
  const [bomList, setBomList] = useState<BomCombo[]>([]);
  const [selectedBomId, setSelectedBomId] = useState<number | "">("");
  const [detail, setDetail] = useState<BomDetailResponse | null>(null);
  const [loadingList, setLoadingList] = useState(false);
  const [versionsRefreshKey, setVersionsRefreshKey] = useState(0);
  const [filteredBoms, setFilteredBoms] = useState<BomCombo[]>([])
  const [currentBom, setCurrentBom] = useState<BomCombo | null>(null);
  const loadDetailInFlightRef = useRef(false);
  const saveInFlightRef = useRef(false);
  const exportInFlightRef = useRef(false);
  const skipAutoSearchRef = useRef(false);
  const detailIdRef = useRef<number | null>(null);
  const lastSearchInputsRef = useRef<BomSearchInputs>(EMPTY_BOM_SEARCH_INPUTS);

  type EditMaterialRow = {
    key: string;
    id?: number;
    itemCode?: string;
    itemName?: string;
    qty: number;
    isConsumable: boolean;

    baseUom?: string;
    stockQty?: number;
    stockUom?: string;
    salesQty?: number;
    salesUom?: string;
  };

  type EditProcessRow = {
    key: string;
    id?: number;
    seqNo?: number;
    processCode?: string;
    processName?: string;
    description: string;
    /** 設備主檔 description（下拉），與 equipmentName 一併解析為 equipment.code */
    equipmentDescription: string;
    equipmentName: string;
    durationInMinute: number;
    prepTimeInMinute: number;
    postProdTimeInMinute: number;
  };

  const [isEditing, setIsEditing] = useState(false);
  const [editLoading, setEditLoading] = useState(false);
  const [editError, setEditError] = useState<string | null>(null);
  const [editBasic, setEditBasic] = useState<{
    description: string;
    outputQty: number;
    outputQtyUom: string;

    isDark: number;
    isFloat: number;
    isDense: number;
    scrapRate: number;
    allergicSubstances: number;
    timeSequence: number;
    complexity: number;
    isDrink: boolean;
    isPowderMixture: boolean;
  } | null>(null);

  const [editMaterials, setEditMaterials] = useState<EditMaterialRow[]>([]);
  const [editProcesses, setEditProcesses] = useState<EditProcessRow[]>([]);

  const [equipmentMasterList, setEquipmentMasterList] = useState<
    EquipmentMasterRow[]
  >([]);
  const [processMasterList, setProcessMasterList] = useState<
    ProcessMasterRow[]
  >([]);
  const [editMasterLoading, setEditMasterLoading] = useState(false);
  const [saving, setSaving] = useState(false);
  const [exporting, setExporting] = useState(false);
  const [saveError, setSaveError] = useState<string | null>(null);
  const [versionId, setVersionId] = useState<number | "">("");
  const [compareMode, setCompareMode] = useState(false);
  const [compareToId, setCompareToId] = useState<number | "">("");
  const [compareOldDetail, setCompareOldDetail] = useState<BomDetailResponse | null>(null);
  const materialEditRef = useRef<BomMaterialEditPanelHandle>(null);
  const processEditRef = useRef<BomProcessEditPanelHandle>(null);
  const basicInfoRef = useRef<BomBasicInfoSectionHandle>(null);
  const [materialDirty, setMaterialDirty] = useState(false);
  const [processDirty, setProcessDirty] = useState(false);
  const [basicInfoDirty, setBasicInfoDirty] = useState(false);

  // Process add form (uses dropdown selections from master tables).
  const [processAddForm, setProcessAddForm] = useState<{
    processCode: string;
    equipmentDescription: string;
    equipmentName: string;
    description: string;
    durationInMinute: number;
    prepTimeInMinute: number;
    postProdTimeInMinute: number;
  }>({
    processCode: "",
    equipmentDescription: "",
    equipmentName: "",
    description: "",
    durationInMinute: 0,
    prepTimeInMinute: 0,
    postProdTimeInMinute: 0,
  });

  const processCodeOptions = useMemo(() => {
    const codes = new Set<string>();
    processMasterList.forEach((p) => {
      if (p.code) codes.add(p.code);
    });
    return Array.from(codes).sort();
  }, [processMasterList]);

  const equipmentDescriptionOptions = useMemo(() => {
    const s = new Set<string>();
    equipmentMasterList.forEach((e) => {
      if (e.description) s.add(e.description);
    });
    return Array.from(s).sort();
  }, [equipmentMasterList]);

  const equipmentNameOptions = useMemo(() => {
    const s = new Set<string>();
    equipmentMasterList.forEach((e) => {
      if (e.name) s.add(e.name);
    });
    return Array.from(s).sort();
  }, [equipmentMasterList]);

  useEffect(() => {
    const loadList = async () => {
      setLoadingList(true);
      try {
        const list = await fetchBomComboClient({ includeInactive: true });
        setBomList(list);
      } finally {
        setLoadingList(false);
      }
    };
    loadList();
  }, []);
  const searchCriteria: Criterion<BomSearchKey>[] = useMemo(
    () => [
      { label: t("Code"), paramName: "code", type: "text" },
      { label: t("Name"), paramName: "name", type: "text" },
    ],
    [t],
  );
  useEffect(() => {
    setFilteredBoms([]);
  }, [bomList]);
  useEffect(() => {
    detailIdRef.current = detail?.id ?? null;
  }, [detail?.id]);

  const recomputeFilteredBoms = useCallback(
    (list: BomCombo[], inputs: BomSearchInputs) => {
      const code = (inputs.code ?? "").trim().toLowerCase();
      const name = (inputs.name ?? "").trim().toLowerCase();
      const matched = list.filter((b) => {
        const label = String(b.label ?? "").toLowerCase();
        const okCode = !code || label.includes(code);
        const okName = !name || label.includes(name);
        return okCode && okName;
      });
      setFilteredBoms(getAmbiguousBomMatches(matched));
      return matched;
    },
    [],
  );

  const loadBomDetail = useCallback(
    async (id: number, options?: { resetVersionIds?: boolean }) => {
      if (!id || loadDetailInFlightRef.current) return;
      loadDetailInFlightRef.current = true;
      setSelectedBomId(id);
      setCurrentBom(bomList.find((b) => b.id === id) ?? null);

      try {
        const d = await fetchBomDetailClient(id);
        setDetail(d);
        setSaveError(null);
        if (options?.resetVersionIds !== false) {
          setVersionId(id);
          setCompareMode(false);
          setCompareToId(id);
          setCompareOldDetail(null);
        }
      } finally {
        loadDetailInFlightRef.current = false;
      }
    },
    [bomList],
  );

  useEffect(() => {
    if (
      !compareMode ||
      !compareToId ||
      !versionId ||
      compareToId === versionId
    ) {
      setCompareOldDetail(null);
      return;
    }
    let cancelled = false;
    void fetchBomDetailClient(compareToId).then((d) => {
      if (!cancelled) setCompareOldDetail(d);
    });
    return () => {
      cancelled = true;
    };
  }, [compareMode, compareToId, versionId]);

  const handleSearchBom = useCallback(
    (inputs: BomSearchInputs) => {
      lastSearchInputsRef.current = inputs;
      const code = (inputs.code ?? "").trim().toLowerCase();
      const name = (inputs.name ?? "").trim().toLowerCase();

      const matched = bomList.filter((b) => {
        const label = String(b.label ?? "").toLowerCase();
        const okCode = !code || label.includes(code);
        const okName = !name || label.includes(name);
        return okCode && okName;
      });

      const picked = pickDefaultBom(matched);
      setFilteredBoms(getAmbiguousBomMatches(matched));

      if (picked) {
        if (picked.id === detailIdRef.current) return;
        void loadBomDetail(picked.id);
      } else if (matched.length === 0) {
        setSelectedBomId("");
        setCurrentBom(null);
        setDetail(null);
      } else {
        setSelectedBomId("");
        setCurrentBom(null);
        setDetail(null);
      }
    },
    [bomList, loadBomDetail],
  );

  useEffect(() => {
    if (bomList.length === 0 || skipAutoSearchRef.current) return;
    const inputs = lastSearchInputsRef.current;
    const hasQuery = Boolean((inputs.code ?? "").trim() || (inputs.name ?? "").trim());
    if (!hasQuery) return;

    const code = (inputs.code ?? "").trim().toLowerCase();
    const name = (inputs.name ?? "").trim().toLowerCase();
    const matched = bomList.filter((b) => {
      const label = String(b.label ?? "").toLowerCase();
      const okCode = !code || label.includes(code);
      const okName = !name || label.includes(name);
      return okCode && okName;
    });
    const picked = pickDefaultBom(matched);
    setFilteredBoms(getAmbiguousBomMatches(matched));
    if (!picked || picked.id === detailIdRef.current) return;
    void loadBomDetail(picked.id);
  }, [bomList, loadBomDetail]);
  const renderBomStatus = (v?: BomStatus | string) => {
    if (v === "active") return t("BOM Status Active");
    if (v === "inactive") return t("BOM Status Inactive");
    return "-";
  };

  const isComparingVersions =
    compareMode &&
    Boolean(compareOldDetail) &&
    compareToId !== "" &&
    versionId !== "" &&
    compareToId !== versionId;

  const renderType = (v?: string) => {
    if (v === "FG") return "成品";
    if (v === "WIP") return "半成品";
    return "-";
  };

  const saveDisabled = !materialDirty && !basicInfoDirty && !processDirty;
  const unresolvedMaterialIssueCount = useMemo(
    () =>
      (detail?.materials ?? []).filter(
        (m) =>
          (m.baseQty == null || m.stockQty == null) &&
          (m.recipeQty ?? m.baseQty ?? 0) > 0,
      ).length,
    [detail?.materials],
  );
  const nonMaterialDirty = basicInfoDirty || processDirty;
  const blockedByUnresolvedMaterialIssue =
    unresolvedMaterialIssueCount > 0 && nonMaterialDirty && !materialDirty;
  const unresolvedMaterialIssueMessage =
    unresolvedMaterialIssueCount > 0
      ? t("bomSave_block_unresolvedMaterialIssue", {
          count: unresolvedMaterialIssueCount,
        })
      : null;

  const isFgDetail = useMemo(() => {
    if (!detail) return false;
    const kind = (detail.bomKind ?? detail.description ?? "FG").trim().toUpperCase();
    return kind !== "WIP";
  }, [detail]);
  const putawayLocationMissing = isFgDetail && !(detail?.putawayLocationCode ?? "").trim();
  const headerOutputQtyUnresolved = detail?.outputQtyStockConvertible === false;
  const putawayLocationMissingWarn = putawayLocationMissing
    ? t("bomPutawayLocation_missing_warn")
    : null;
  // Do not hard-disable Save purely from `detail` flags,
  // because user may still be editing draft values (putaway/header fix).
  // We enforce these blockers again in `handleSave()` using draft state.
  const effectiveSaveDisabled =
    saveDisabled || blockedByUnresolvedMaterialIssue;

  const refreshAfterSave = useCallback(async (saved: BomDetailResponse) => {
    const full = await fetchBomDetailClient(saved.id);
    detailIdRef.current = full.id;
    skipAutoSearchRef.current = true;
    setDetail(full);
    setVersionId(full.id);
    setCompareToId(full.id);
    setCompareMode(false);
    setCompareOldDetail(null);
    setVersionsRefreshKey((k) => k + 1);

    try {
      const list = await fetchBomComboClient({ includeInactive: true });
      setBomList(list);
      setCurrentBom(list.find((b) => b.id === full.id) ?? null);
      const inputs = lastSearchInputsRef.current;
      const hasQuery = Boolean(
        (inputs.code ?? "").trim() || (inputs.name ?? "").trim(),
      );
      if (hasQuery) {
        recomputeFilteredBoms(list, inputs);
      }
    } finally {
      skipAutoSearchRef.current = false;
    }
  }, [recomputeFilteredBoms]);

  const handleSave = useCallback(async () => {
    if (!detail?.id || saveInFlightRef.current) return;
    const materialPanel = materialEditRef.current;
    const processPanel = processEditRef.current;
    const basicPanel = basicInfoRef.current;
    const hasMaterialChanges = materialPanel?.hasMaterialChanges() ?? false;
    const hasProcessChanges = processPanel?.hasProcessChanges() ?? false;
    const hasBasicChanges = basicPanel?.hasBasicChanges() ?? false;
    const hasPutawayChanges = basicPanel?.hasPutawayChanges() ?? false;

    if (!hasMaterialChanges && !hasBasicChanges && !hasPutawayChanges && !hasProcessChanges) return;

    const putawayMissing = putawayLocationMissing && !hasPutawayChanges;
    if (putawayMissing) {
      setSaveError(t("bomPutawayLocation_missing_warn"));
      return;
    }

    const headerUnresolved = headerOutputQtyUnresolved;
    const headerDraft = basicPanel?.getDraft();
    const headerChangedInDraft =
      headerDraft != null &&
      (headerDraft.outputQty !== detail.outputQty ||
        (headerDraft.outputQtyUom ?? "") !== (detail.outputQtyUom ?? ""));
    if (headerUnresolved && !headerChangedInDraft) {
      setSaveError(t("bomHeaderOutputQtyStockConvertFail_warn"));
      return;
    }
    if (unresolvedMaterialIssueCount > 0 && !hasMaterialChanges && (hasBasicChanges || hasProcessChanges || hasPutawayChanges)) {
      setSaveError(
        t("bomSave_block_unresolvedMaterialIssue", {
          count: unresolvedMaterialIssueCount,
        }),
      );
      return;
    }

    const basicValidation = basicPanel?.validate() ?? null;
    if (basicValidation) {
      setSaveError(basicValidation);
      return;
    }

    const processValidation = (await processPanel?.validateAsync()) ?? null;
    if (processValidation) {
      setSaveError(processValidation);
      return;
    }

    saveInFlightRef.current = true;
    setSaving(true);
    setSaveError(null);
    try {
      let currentDetail = detail;
      let sourceDetail = detail;

      if (hasMaterialChanges || hasPutawayChanges || hasProcessChanges) {
        currentDetail = await saveBomAsNewVersionClient(detail.id, {
          materials: hasMaterialChanges
            ? materialPanel!.getMaterialSaveLines()
            : materialVersionLinesFromDetail(detail),
          ...(hasPutawayChanges
            ? {
                putawayLocationCode:
                  basicPanel!.getPutawayLocationCodeForSave() ?? "",
              }
            : {}),
          ...(hasProcessChanges
            ? { processes: processPanel!.getProcessSaveLines() }
            : {}),
        });
        materialPanel?.cancelEdit();
        processPanel?.cancelEdit();
        setMaterialDirty(false);
        setProcessDirty(false);
        if (hasPutawayChanges && !hasBasicChanges) {
          basicPanel?.cancelEdit();
          setBasicInfoDirty(false);
        }
        sourceDetail = currentDetail;
      }

      if (hasBasicChanges) {
        const draft = basicPanel!.getDraft();
        if (draft) {
          currentDetail = await saveBasicInfoDraft(
            currentDetail.id,
            sourceDetail,
            draft,
          );
          basicPanel?.cancelEdit();
          setBasicInfoDirty(false);
        }
      }

      await refreshAfterSave(currentDetail);
    } catch (e: unknown) {
      const message = e instanceof Error ? e.message : "Failed to save BOM";
      setSaveError(message);
    } finally {
      setSaving(false);
      saveInFlightRef.current = false;
    }
  }, [
    detail,
    headerOutputQtyUnresolved,
    putawayLocationMissing,
    refreshAfterSave,
    t,
    unresolvedMaterialIssueCount,
  ]);

  const handleExportExcel = useCallback(async () => {
    if (typeof versionId !== "number" || exportInFlightRef.current) return;
    exportInFlightRef.current = true;
    setExporting(true);
    setSaveError(null);
    try {
      const code = (detail?.itemCode ?? currentBom?.code ?? "BOM").trim() || "BOM";
      const rev = detail?.revisionNo ?? 1;
      const { blob, fileName } = await downloadBomDetailExcelClient(
        versionId,
        `${code}_V${rev}.xlsx`,
      );
      const url = URL.createObjectURL(blob);
      const a = document.createElement("a");
      a.href = url;
      a.download = fileName;
      a.click();
      URL.revokeObjectURL(url);
    } catch (e: unknown) {
      setSaveError(e instanceof Error ? e.message : t("Export excel failed"));
    } finally {
      setExporting(false);
      exportInFlightRef.current = false;
    }
  }, [currentBom?.code, detail?.itemCode, detail?.revisionNo, t, versionId]);

  const handleToggleCompare = useCallback(async () => {
    if (compareMode) {
      setCompareMode(false);
      setCompareToId(versionId);
      setCompareOldDetail(null);
      return;
    }
    if (!currentBom?.code || versionId === "") return;
    const list = await fetchBomVersionsClient(
      currentBom.code,
      detail?.bomKind ?? detail?.description ?? "FG",
    );
    const other = list.find((v) => v.id !== versionId);
    setCompareToId(other?.id ?? versionId);
    setCompareMode(true);
  }, [compareMode, currentBom?.code, detail?.bomKind, detail?.description, versionId]);

  /*
  const handleResetBom = useCallback(() => {
    setFilteredBoms(bomList);
    setSelectedBomId("");
    setDetail(null);
  }, [bomList]);
  */
  const genKey = () => Math.random().toString(36).slice(2);

  const startEdit = useCallback(async () => {
    if (!detail) return;

    setEditError(null);
    setEditMasterLoading(true);
    try {
      const [equipments, processes] = await Promise.all([
        fetchAllEquipmentsMasterClient(),
        fetchAllProcessesMasterClient(),
      ]);
      setEquipmentMasterList(equipments);
      setProcessMasterList(processes);

      setEditBasic({
        description: detail.description ?? "",
        outputQty: detail.outputQty ?? 0,
        outputQtyUom: detail.outputQtyUom ?? "",

        isDark: detail.isDark ?? 0,
        isFloat: detail.isFloat ?? 0,
        isDense: detail.isDense ?? 0,
        scrapRate: detail.scrapRate ?? 0,
        allergicSubstances: detail.allergicSubstances ?? 0,
        timeSequence: detail.timeSequence ?? 0,
        complexity: detail.complexity ?? 0,
        isDrink: detail.isDrink ?? false,
        isPowderMixture: detail.isPowderMixture ?? false,
      });

      setEditMaterials(
        (detail.materials ?? []).map((m) => ({
          key: genKey(),
          id: undefined,
          itemCode: m.itemCode ?? "",
          itemName: m.itemName ?? "",
          qty: m.baseQty ?? 0,
          isConsumable: m.isConsumable ?? false,
          baseUom: m.baseUom,
          stockQty: m.stockQty,
          stockUom: m.stockUom,
          salesQty: m.salesQty,
          salesUom: m.salesUom,
        })),
      );

      setEditProcesses(
        (detail.processes ?? []).map((p) => {
          const code = (p.equipmentCode ?? "").trim();
          const eq = code
            ? equipments.find((e) => e.code === code)
            : undefined;
          return {
            key: genKey(),
            id: undefined,
            seqNo: p.seqNo,
            processCode: p.processCode ?? "",
            processName: p.processName,
            description: p.processDescription ?? "",
            equipmentDescription: eq?.description ?? "",
            equipmentName: eq?.name ?? "",
            durationInMinute: p.durationInMinute ?? 0,
            prepTimeInMinute: p.prepTimeInMinute ?? 0,
            postProdTimeInMinute: p.postProdTimeInMinute ?? 0,
          };
        }),
      );

      setIsEditing(true);
    } catch (e: unknown) {
      const msg =
        e && typeof e === "object" && "message" in e
          ? String((e as { message?: string }).message)
          : "載入製程／設備主檔失敗";
      setEditError(msg);
    } finally {
      setEditMasterLoading(false);
    }
  }, [detail]);

  const cancelEdit = useCallback(() => {
    setIsEditing(false);
    setEditLoading(false);
    setEditError(null);
    setEditBasic(null);
    setEditMaterials([]);
    setEditProcesses([]);
    setProcessAddForm({
      processCode: "",
      equipmentDescription: "",
      equipmentName: "",
      description: "",
      durationInMinute: 0,
      prepTimeInMinute: 0,
      postProdTimeInMinute: 0,
    });
    setEquipmentMasterList([]);
    setProcessMasterList([]);
  }, []);

  const addMaterialRow = useCallback(() => {
    setEditMaterials((prev) => [
      ...prev,
      {
        key: genKey(),
        itemCode: "",
        itemName: "",
        qty: 0,
        isConsumable: false,
        baseUom: "",
        stockQty: undefined,
        stockUom: "",
        salesQty: undefined,
        salesUom: "",
      },
    ]);
  }, []);

  const addProcessRow = useCallback(() => {
    setEditProcesses((prev) => [
      ...prev,
      {
        key: genKey(),
        seqNo: undefined,
        processCode: "",
        processName: "",
        description: "",
        equipmentDescription: "",
        equipmentName: "",
        durationInMinute: 0,
        prepTimeInMinute: 0,
        postProdTimeInMinute: 0,
      },
    ]);
  }, []);

  const addProcessFromForm = useCallback(() => {
    const pCode = processAddForm.processCode.trim();
    if (!pCode) {
      setEditError("請先選擇工序 Process Code");
      return;
    }

    const ed = processAddForm.equipmentDescription.trim();
    const en = processAddForm.equipmentName.trim();
    if ((ed && !en) || (!ed && en)) {
      setEditError("設備描述與名稱需同時選取，或同時留空（不適用）");
      return;
    }
    if (ed && en) {
      const resolved = resolveEquipmentCode(equipmentMasterList, ed, en);
      if (!resolved) {
        setEditError(
          `設備組合「${ed}-${en}」在主檔中找不到對應設備代碼，請確認後再試`,
        );
        return;
      }
    }

    setEditProcesses((prev) => [
      ...prev,
      {
        key: genKey(),
        seqNo: undefined,
        processCode: pCode,
        processName: "",
        description: processAddForm.description ?? "",
        equipmentDescription: ed,
        equipmentName: en,
        durationInMinute: processAddForm.durationInMinute ?? 0,
        prepTimeInMinute: processAddForm.prepTimeInMinute ?? 0,
        postProdTimeInMinute: processAddForm.postProdTimeInMinute ?? 0,
      },
    ]);

    setProcessAddForm({
      processCode: "",
      equipmentDescription: "",
      equipmentName: "",
      description: "",
      durationInMinute: 0,
      prepTimeInMinute: 0,
      postProdTimeInMinute: 0,
    });
    setEditError(null);
  }, [processAddForm, equipmentMasterList]);

  const deleteMaterialRow = useCallback((key: string) => {
    setEditMaterials((prev) => prev.filter((r) => r.key !== key));
  }, []);

  const deleteProcessRow = useCallback((key: string) => {
    setEditProcesses((prev) => prev.filter((r) => r.key !== key));
  }, []);

  const handleSaveEdit = useCallback(async () => {
    if (!detail || !editBasic) return;
    setEditLoading(true);
    setEditError(null);

    try {
      for (const p of editProcesses) {
        if (!p.processCode?.trim()) {
          throw new Error("工序行 Process Code 不能为空");
        }
        const ed = p.equipmentDescription.trim();
        const en = p.equipmentName.trim();
        if ((ed && !en) || (!ed && en)) {
          throw new Error("各製程行的設備描述與名稱需同時填寫或同時留空");
        }
        if (ed && en) {
          const resolved = resolveEquipmentCode(equipmentMasterList, ed, en);
          if (!resolved) {
            throw new Error(
              `設備「${ed}-${en}」在主檔中無對應設備代碼，請修正後再儲存`,
            );
          }
        }
      }

      const payload: any = {
        description: editBasic.description || undefined,
        outputQty: editBasic.outputQty,
        outputQtyUom: editBasic.outputQtyUom || undefined,

        isDark: editBasic.isDark,
        isFloat: editBasic.isFloat,
        isDense: editBasic.isDense,
        scrapRate: editBasic.scrapRate,
        allergicSubstances: editBasic.allergicSubstances,
        timeSequence: editBasic.timeSequence,
        complexity: editBasic.complexity,
        isDrink: editBasic.isDrink,
        isPowderMixture: editBasic.isPowderMixture,
        processes: editProcesses.map((p) => {
          const ed = p.equipmentDescription.trim();
          const en = p.equipmentName.trim();
          const equipmentCode =
            ed && en
              ? resolveEquipmentCode(equipmentMasterList, ed, en) ?? undefined
              : undefined;
          return {
            id: p.id,
            seqNo: p.seqNo,
            processCode: p.processCode?.trim() || undefined,
            equipmentCode,
            description: p.description || undefined,
            durationInMinute: p.durationInMinute,
            prepTimeInMinute: p.prepTimeInMinute,
            postProdTimeInMinute: p.postProdTimeInMinute,
          };
        }),
      };

      const updated = await editBomClient(detail.id, payload);
      setDetail(updated);
      setIsEditing(false);
    } catch (e: any) {
      setEditError(e?.message || "保存失败");
    } finally {
      setEditLoading(false);
    }
  }, [detail, editBasic, editProcesses, equipmentMasterList]);

  return (
    <Stack spacing={2}>
      <SearchBox<BomSearchKey>
        criteria={searchCriteria}
        onSearch={handleSearchBom}
        //onReset={handleResetBom}
      />
  
      {filteredBoms.length > 1 && (
        <Paper variant="outlined" sx={{ p: 1.5 }}>
          <Typography variant="subtitle2" sx={{ mb: 1 }}>
            找到多筆 BOM，請選擇一筆載入明細
          </Typography>
          <Stack direction="row" spacing={1} flexWrap="wrap">
            {filteredBoms.map((b) => (
              <Button
                key={b.id}
                size="small"
                variant={selectedBomId === b.id ? "contained" : "outlined"}
                onClick={() => void loadBomDetail(b.id)}
              >
                {String(b.label ?? b.id)} ({renderType(b.description)}, {renderBomStatus(b.status)})
              </Button>
            ))}
          </Stack>
        </Paper>
      )}
      {detail && (
        <Stack spacing={2} sx={{ pointerEvents: saving || exporting ? "none" : "auto" }}>
            <Typography variant="subtitle1">
      {detail.itemCode} {detail.itemName}
    </Typography>

          {(currentBom?.code ?? detail.itemCode) && (
            <BomVersionControlBar
              bomCode={currentBom?.code ?? detail.itemCode ?? ""}
              bomKind={detail.bomKind ?? detail.description ?? "FG"}
              versionId={versionId}
              compareMode={compareMode}
              compareToId={compareToId}
              saving={saving}
              exporting={exporting}
              versionsRefreshKey={versionsRefreshKey}
              saveDisabled={effectiveSaveDisabled}
              exportDisabled={typeof versionId !== "number"}
              saveError={
                blockedByUnresolvedMaterialIssue
                  ? unresolvedMaterialIssueMessage
                  : saveError
              }
              onVersionChange={(id) => {
                setVersionId(id);
                void loadBomDetail(id, { resetVersionIds: false });
              }}
              onToggleCompare={() => void handleToggleCompare()}
              onCompareToChange={setCompareToId}
              onExport={() => void handleExportExcel()}
              onSave={() => void handleSave()}
            />
          )}

          {unresolvedMaterialIssueMessage && (
            <Typography variant="body2" color="warning.main" sx={{ mt: -1 }}>
              {unresolvedMaterialIssueMessage}
            </Typography>
          )}

          {putawayLocationMissingWarn && (
            <Typography variant="body2" color="warning.main" sx={{ mt: -1 }}>
              {putawayLocationMissingWarn}
            </Typography>
          )}

          <BomBasicInfoSection
            ref={basicInfoRef}
            detail={detail}
            compareOldDetail={compareOldDetail}
            comparing={isComparingVersions}
            editDisabled={compareMode}
            onDirtyChange={setBasicInfoDirty}
          />

          <BomMaterialEditPanel
            ref={materialEditRef}
            detail={detail}
            compareOldDetail={compareOldDetail}
            comparing={isComparingVersions}
            editDisabled={compareMode}
            onDirtyChange={setMaterialDirty}
          />

          <BomProcessEditPanel
            ref={processEditRef}
            detail={detail}
            compareOldDetail={compareOldDetail}
            comparing={isComparingVersions}
            onDirtyChange={setProcessDirty}
          />
        </Stack>
      )}
    </Stack>
  );
};

export default ImportBomDetailTab;