"use client";

import { useCallback, useEffect, useMemo, useRef, useState } from "react";
import {
  Alert,
  Autocomplete,
  Box,
  Button,
  CircularProgress,
  Grid,
  MenuItem,
  Paper,
  Stack,
  TextField,
  Tooltip,
  Typography,
} from "@mui/material";
import ArrowBackIcon from "@mui/icons-material/ArrowBack";
import { DatePicker, LocalizationProvider } from "@mui/x-date-pickers";
import { AdapterDayjs } from "@mui/x-date-pickers/AdapterDayjs";
import dayjs from "dayjs";
import "dayjs/locale/zh-hk";
import * as XLSX from "xlsx-js-style";
import {
  CompletedDoPickOrderResponse,
  fetchCompletedDoPickOrdersAll,
  fetchCompletedDoPickOrdersWorkbenchAll,
} from "@/app/api/pickOrder/actions";
import { OUTPUT_DATE_FORMAT } from "@/app/utils/formatUtil";
import { useTranslation } from "react-i18next";

type FloorFilter = "all" | "2/F" | "4/F";
type BreakdownDimension = "lane" | "shop" | "floor";

type DailySummaryRow = {
  date: string;
  floor2F: number;
  floor4F: number;
  truckX: number;
  total: number;
};

type ShopDailyRow = DailySummaryRow & {
  shopCode: string;
  shopName: string;
};

type ShopQtyRow = {
  code: string;
  name: string;
  qty: number;
};

type BreakdownRow = {
  key: string;
  label: string;
  qty: number;
};

type Props = {
  mode?: "normal" | "workbench";
};

const TRUCK_X_LANE = "車線-X";
const ALL = "all";
const CHART_ROW_H = 38;
/** Jasper / report standard used across FPSMS Excel output. */
const EXCEL_FONT_NAME = "微軟正黑體";
const DAILY_SHEET_LAST_COL = 6;

type FilterOption = { value: string; label: string };

function normalizeTruckLane(raw: string | null | undefined): string {
  const value = String(raw ?? "").trim();
  return value || TRUCK_X_LANE;
}

function shortLaneLabel(raw: string | null | undefined): string {
  const value = normalizeTruckLane(raw);
  const stripped = value
    .replace(/^(車線)[-–—]?\s*/, "")
    .replace(/^(truck)\s*[-–—]?\s*/i, "")
    .trim();
  return stripped || value;
}

function normalizeShopCode(raw: string | null | undefined): string {
  return String(raw ?? "").trim();
}

function shopGroup(raw: string | null | undefined): string {
  const code = normalizeShopCode(raw).toUpperCase();
  if (!code) return "";
  return code.slice(0, 2);
}

function digitsWithoutLeadingZeros(digits: string): string {
  const stripped = digits.replace(/^0+/, "");
  return stripped || (digits ? "0" : "");
}

/** Shop names often already start with the code, sometimes zero-padded (`HP23` vs `HP023`). */
function shopNameWithoutCode(code: string, name: string | null | undefined): string {
  const shopName = String(name ?? "").trim();
  if (!shopName) return "";
  const normalized = normalizeShopCode(code).toUpperCase();
  const codeParts = normalized.match(/^([A-Z]+)(\d*)$/);
  const nameParts = shopName.match(/^([A-Za-z]+)(\d*)(?:\s*[-–—]\s*|\s+)([\s\S]*)$/);
  if (codeParts && nameParts) {
    const sameLetters = nameParts[1].toUpperCase() === codeParts[1];
    const sameDigits =
      !nameParts[2] ||
      digitsWithoutLeadingZeros(nameParts[2]) === digitsWithoutLeadingZeros(codeParts[2]);
    if (sameLetters && sameDigits) return nameParts[3].trim();
  }
  if (normalized && shopName.toUpperCase().startsWith(normalized)) {
    return shopName.slice(normalized.length).replace(/^[\s\-–—]+/, "").trim();
  }
  return shopName;
}

function formatShopLabel(code: string, name: string | null | undefined): string {
  const normalized = normalizeShopCode(code).toUpperCase();
  const displayName = shopNameWithoutCode(normalized, name);
  if (!normalized) return displayName;
  if (!displayName || displayName.toUpperCase() === normalized) return normalized;
  return `${normalized} ${displayName}`;
}

function applyProjectExcelFont(worksheet: XLSX.WorkSheet) {
  if (!worksheet["!ref"]) return;
  const range = XLSX.utils.decode_range(worksheet["!ref"]);
  for (let r = range.s.r; r <= range.e.r; r += 1) {
    for (let c = range.s.c; c <= range.e.c; c += 1) {
      const addr = XLSX.utils.encode_cell({ r, c });
      const cell = worksheet[addr];
      if (!cell) continue;
      const style = (cell.s ?? {}) as XLSX.CellStyle;
      const font = style.font ?? {};
      cell.s = {
        ...style,
        font: {
          ...font,
          name: EXCEL_FONT_NAME,
          sz: font.sz ?? 11,
        },
      };
    }
  }
}

function buildShopQtyRows(source: CompletedDoPickOrderResponse[]): ShopQtyRow[] {
  const grouped = new Map<string, ShopQtyRow>();
  source.forEach((record) => {
    const code = normalizeShopCode(record.shopCode).toUpperCase();
    if (!code) return;
    const name = shopNameWithoutCode(code, record.shopName);
    const current = grouped.get(code) ?? { code, name, qty: 0 };
    if (!current.name && name) current.name = name;
    current.qty += Number(record.numberOfCartons ?? 0);
    grouped.set(code, current);
  });
  return Array.from(grouped.values()).sort(
    (a, b) => b.qty - a.qty || a.code.localeCompare(b.code, "zh-Hant"),
  );
}

function isShopGroupValue(shop: string): boolean {
  if (shop === ALL) return false;
  const code = normalizeShopCode(shop).toUpperCase();
  return code.length > 0 && code === shopGroup(code);
}

function recordMatchesShop(
  recordShop: string | null | undefined,
  shop: string,
): boolean {
  if (shop === ALL) return true;
  const code = normalizeShopCode(recordShop).toUpperCase();
  if (!code) return false;
  const selected = normalizeShopCode(shop).toUpperCase();
  if (isShopGroupValue(selected)) {
    return shopGroup(code) === selected;
  }
  return code === selected;
}

function recordMatchesFilters(
  record: CompletedDoPickOrderResponse,
  floor: FloorFilter,
  lane: string,
  shop: string,
): boolean {
  if (floor !== ALL && record.storeId !== floor) return false;
  if (lane !== ALL && normalizeTruckLane(record.truckLanceCode) !== lane) return false;
  if (!recordMatchesShop(record.shopCode, shop)) return false;
  return true;
}

function resolveBreakdownDimension(lane: string, shop: string): BreakdownDimension {
  if (shop !== ALL) return "shop";
  if (lane !== ALL) return "shop";
  return "lane";
}

type SearchableFilterProps = {
  label: string;
  options: FilterOption[];
  value: string;
  onChange: (next: string) => void;
};

function SearchableFilterSelect({ label, options, value, onChange }: SearchableFilterProps) {
  const selectable = options.filter((option) => option.value !== ALL);
  const selected = selectable.find((option) => option.value === value) ?? null;
  const placeholder = options.find((option) => option.value === ALL)?.label ?? "";

  return (
    <Autocomplete
      options={selectable}
      value={selected}
      onChange={(_, option) => onChange(option?.value ?? ALL)}
      getOptionLabel={(option) => option?.label ?? ""}
      isOptionEqualToValue={(a, b) => a?.value === b?.value}
      selectOnFocus
      autoHighlight
      handleHomeEndKeys
      autoComplete
      includeInputInList
      size="small"
      sx={{ width: "100%" }}
      renderInput={(params) => (
        <TextField {...params} label={label} placeholder={placeholder} />
      )}
    />
  );
}

const FinishedGoodCartonDashboardTab: React.FC<Props> = ({ mode = "normal" }) => {
  const { t, i18n } = useTranslation();
  const numberLocale = i18n.language?.startsWith("zh") ? "zh-HK" : "en-US";
  const [floor, setFloor] = useState<FloorFilter>(ALL);
  const [lane, setLane] = useState<string>(ALL);
  const [shop, setShop] = useState<string>(ALL);
  const [date, setDate] = useState<string>(dayjs().format("YYYY-MM-DD"));
  const [loading, setLoading] = useState(false);
  const [isExporting, setIsExporting] = useState(false);
  const [isExportingFiltered, setIsExportingFiltered] = useState(false);
  const exportInFlightRef = useRef(false);
  const filteredExportInFlightRef = useRef(false);
  const [error, setError] = useState<string>("");
  const [records, setRecords] = useState<CompletedDoPickOrderResponse[]>([]);
  const todayDate = dayjs().format("YYYY-MM-DD");
  const filtersAreActive =
    floor !== ALL || lane !== ALL || shop !== ALL || date !== todayDate;

  const resetFilters = useCallback(() => {
    setFloor(ALL);
    setLane(ALL);
    setShop(ALL);
    setDate(dayjs().format("YYYY-MM-DD"));
  }, []);

  const loadData = useCallback(async () => {
    setLoading(true);
    setError("");
    try {
      const data =
        mode === "workbench"
          ? await fetchCompletedDoPickOrdersWorkbenchAll(
              date ? { targetDate: date } : undefined,
            )
          : await fetchCompletedDoPickOrdersAll(
              date ? { targetDate: date } : undefined,
            );
      setRecords(data);
    } catch (err) {
      console.error("Failed to load finished good carton dashboard data", err);
      setError(t("Failed to load FG carton quantity. Please try again later."));
      setRecords([]);
    } finally {
      setLoading(false);
    }
  }, [date, mode, t]);

  useEffect(() => {
    loadData();
  }, [loadData]);

  const laneOptions = useMemo(() => {
    const byRaw = new Map<string, string>();
    records.forEach((record) => {
      if (floor !== ALL && record.storeId !== floor) return;
      if (!recordMatchesShop(record.shopCode, shop)) return;
      const raw = normalizeTruckLane(record.truckLanceCode);
      if (!byRaw.has(raw)) byRaw.set(raw, shortLaneLabel(raw));
    });
    return Array.from(byRaw.entries())
      .map(([value, label]) => ({ value, label }))
      .sort((a, b) => {
        if (a.value === TRUCK_X_LANE) return 1;
        if (b.value === TRUCK_X_LANE) return -1;
        return a.label.localeCompare(b.label, "zh-Hant");
      });
  }, [records, floor, shop]);

  const shopOptions = useMemo(() => {
    const groups = new Set<string>();
    records.forEach((record) => {
      if (floor !== ALL && record.storeId !== floor) return;
      if (lane !== ALL && normalizeTruckLane(record.truckLanceCode) !== lane) return;
      const group = shopGroup(record.shopCode);
      if (group) groups.add(group);
    });
    return Array.from(groups)
      .sort((a, b) => a.localeCompare(b, "zh-Hant"))
      .map((group) => ({ value: group, label: group }));
  }, [records, floor, lane]);

  const laneFilterOptions = useMemo<FilterOption[]>(() => {
    const options: FilterOption[] = [{ value: ALL, label: t("All lanes") }, ...laneOptions];
    if (lane !== ALL && !options.some((option) => option.value === lane)) {
      options.splice(1, 0, { value: lane, label: shortLaneLabel(lane) });
    }
    return options;
  }, [laneOptions, lane, t]);

  const shopFilterValue = shop === ALL ? ALL : shopGroup(shop);

  const shopFilterOptions = useMemo<FilterOption[]>(() => {
    const options: FilterOption[] = [{ value: ALL, label: t("All shops") }, ...shopOptions];
    if (
      shopFilterValue !== ALL &&
      !options.some((option) => option.value === shopFilterValue)
    ) {
      options.splice(1, 0, { value: shopFilterValue, label: shopFilterValue });
    }
    return options;
  }, [shopOptions, shopFilterValue, t]);

  const filteredRecords = useMemo(
    () => records.filter((record) => recordMatchesFilters(record, floor, lane, shop)),
    [records, floor, lane, shop],
  );

  const rows = useMemo<DailySummaryRow[]>(() => {
    const summary = new Map<string, DailySummaryRow>();

    filteredRecords.forEach((record) => {
      const day = dayjs(record.deliveryDate).isValid()
        ? dayjs(record.deliveryDate).format("YYYY-MM-DD")
        : "-";
      const cartonQty = Number(record.numberOfCartons ?? 0);

      const current = summary.get(day) ?? {
        date: day,
        floor2F: 0,
        floor4F: 0,
        truckX: 0,
        total: 0,
      };

      if (record.storeId === "2/F") {
        current.floor2F += cartonQty;
      }
      if (record.storeId === "4/F") {
        current.floor4F += cartonQty;
      }
      if (normalizeTruckLane(record.truckLanceCode) === TRUCK_X_LANE) {
        current.truckX += cartonQty;
      }

      current.total += cartonQty;
      summary.set(day, current);
    });

    return Array.from(summary.values()).sort((a, b) => b.date.localeCompare(a.date));
  }, [filteredRecords]);

  const breakdownDimension = resolveBreakdownDimension(lane, shop);

  const breakdownRows = useMemo<BreakdownRow[]>(() => {
    const toSorted = (slices: BreakdownRow[]) =>
      slices.sort((a, b) => b.qty - a.qty || a.label.localeCompare(b.label, "zh-Hant"));

    if (breakdownDimension === "floor") {
      let floor2F = 0;
      let floor4F = 0;
      let truckX = 0;
      filteredRecords.forEach((record) => {
        const cartonQty = Number(record.numberOfCartons ?? 0);
        if (record.storeId === "2/F") floor2F += cartonQty;
        if (record.storeId === "4/F") floor4F += cartonQty;
        if (normalizeTruckLane(record.truckLanceCode) === TRUCK_X_LANE) truckX += cartonQty;
      });
      return toSorted(
        [
          { key: "2/F", label: "2/F", qty: floor2F },
          { key: "4/F", label: "4/F", qty: floor4F },
          { key: TRUCK_X_LANE, label: shortLaneLabel(TRUCK_X_LANE), qty: truckX },
        ].filter((row) => {
          if (row.qty > 0) return true;
          if (row.key === "2/F" || row.key === "4/F") return floor === row.key;
          return lane === TRUCK_X_LANE && row.key === TRUCK_X_LANE;
        }),
      );
    }

    const grouped = new Map<string, BreakdownRow>();
    filteredRecords.forEach((record) => {
      const cartonQty = Number(record.numberOfCartons ?? 0);
      if (breakdownDimension === "lane") {
        const key = normalizeTruckLane(record.truckLanceCode);
        const current = grouped.get(key) ?? {
          key,
          label: shortLaneLabel(key),
          qty: 0,
        };
        current.qty += cartonQty;
        grouped.set(key, current);
        return;
      }

      const code = normalizeShopCode(record.shopCode).toUpperCase();
      const name = String(record.shopName ?? "").trim();
      const key = shop !== ALL ? code : shopGroup(record.shopCode);
      if (!key) return;
      const label = shop !== ALL ? formatShopLabel(code, name) : key;
      const current = grouped.get(key) ?? { key, label, qty: 0 };
      if (shop !== ALL && name) current.label = formatShopLabel(code, name);
      current.qty += cartonQty;
      grouped.set(key, current);
    });

    return toSorted(
      Array.from(grouped.values()).filter((row) => {
        if (row.qty > 0) return true;
        if (breakdownDimension === "shop") return shop !== ALL && row.key === shop;
        return lane !== ALL && row.key === lane;
      }),
    );
  }, [breakdownDimension, filteredRecords, floor, lane, shop]);

  const breakdownCaption =
    breakdownDimension === "shop"
      ? shop !== ALL
        ? t("Cartons by shop")
        : t("Cartons by shop group")
      : breakdownDimension === "floor"
        ? t("Cartons by floor")
        : t("Cartons by lane");

  const applyBreakdownClick = useCallback(
    (row: BreakdownRow) => {
      if (breakdownDimension === "lane") {
        setLane((prev) => (prev === row.key ? ALL : row.key));
        return;
      }
      if (breakdownDimension === "shop") {
        setShop((prev) => {
          if (prev === row.key) {
            const group = shopGroup(row.key);
            return group && group !== row.key ? group : ALL;
          }
          return row.key;
        });
      }
    },
    [breakdownDimension],
  );

  const viewingSpecificShop = shop !== ALL && !isShopGroupValue(shop);
  const chartClicksEnabled = !viewingSpecificShop;
  const chartCanGoBack = lane !== ALL || shop !== ALL;

  const goBackChartLevel = useCallback(() => {
    if (shop !== ALL && !isShopGroupValue(shop)) {
      setShop(shopGroup(shop) || ALL);
      return;
    }
    if (shop !== ALL) {
      setShop(ALL);
      return;
    }
    if (lane !== ALL) setLane(ALL);
  }, [lane, shop]);

  const isBreakdownRowActive = useCallback(
    (row: BreakdownRow) => {
      if (breakdownDimension === "lane") return lane === row.key;
      if (breakdownDimension === "shop") return shop === row.key;
      if (row.key === "2/F" || row.key === "4/F") return floor === row.key;
      return lane === TRUCK_X_LANE && row.key === TRUCK_X_LANE;
    },
    [breakdownDimension, floor, lane, shop],
  );

  const summary = useMemo(() => {
    return rows.reduce(
      (acc, row) => {
        acc.floor2F += row.floor2F;
        acc.floor4F += row.floor4F;
        acc.truckX += row.truckX;
        acc.total += row.total;
        return acc;
      },
      { floor2F: 0, floor4F: 0, truckX: 0, total: 0 },
    );
  }, [rows]);

  const chartMaxQty = Math.max(1, ...breakdownRows.map((row) => row.qty));

  const buildDailyRowsFromRecords = useCallback(
    (
      sourceRecords: CompletedDoPickOrderResponse[],
      startDate: dayjs.Dayjs,
      endDate: dayjs.Dayjs,
      selectedFloor: FloorFilter,
      selectedLane: string,
      selectedShop: string,
    ): ShopDailyRow[] => {
      const summaryMap = new Map<string, ShopDailyRow>();
      const start = startDate.startOf("day");
      const end = endDate.endOf("day");

      sourceRecords.forEach((record) => {
        if (!recordMatchesFilters(record, selectedFloor, selectedLane, selectedShop)) {
          return;
        }

        const deliveryDay = dayjs(record.deliveryDate, ["YYYY-MM-DD", "YYYYMMDD"], true);
        if (!deliveryDay.isValid() || deliveryDay.isBefore(start) || deliveryDay.isAfter(end)) {
          return;
        }

        const dayKey = deliveryDay.format("YYYY-MM-DD");
        const shopCode = normalizeShopCode(record.shopCode).toUpperCase() || "-";
        const shopName = shopNameWithoutCode(shopCode, record.shopName);
        const mapKey = `${dayKey}|${shopCode}`;
        const cartonQty = Number(record.numberOfCartons ?? 0);
        const current = summaryMap.get(mapKey) ?? {
          date: dayKey,
          shopCode,
          shopName,
          floor2F: 0,
          floor4F: 0,
          truckX: 0,
          total: 0,
        };
        if (!current.shopName && shopName) current.shopName = shopName;

        if (record.storeId === "2/F") current.floor2F += cartonQty;
        if (record.storeId === "4/F") current.floor4F += cartonQty;
        if (normalizeTruckLane(record.truckLanceCode) === TRUCK_X_LANE) current.truckX += cartonQty;

        current.total += cartonQty;
        summaryMap.set(mapKey, current);
      });

      return Array.from(summaryMap.values()).sort(
        (a, b) =>
          a.date.localeCompare(b.date) || a.shopCode.localeCompare(b.shopCode, "zh-Hant"),
      );
    },
    [],
  );

  const calcSummary = useCallback((dailyRows: DailySummaryRow[]) => {
    return dailyRows.reduce(
      (acc, row) => {
        acc.floor2F += row.floor2F;
        acc.floor4F += row.floor4F;
        acc.truckX += row.truckX;
        acc.total += row.total;
        return acc;
      },
      { floor2F: 0, floor4F: 0, truckX: 0, total: 0 },
    );
  }, []);

  const styleWorksheet = useCallback((worksheet: XLSX.WorkSheet, dataRowsCount: number) => {
    const summaryTitleRow = 4 + dataRowsCount;
    const summaryStartRow = 5 + dataRowsCount;

    worksheet["!cols"] = [
      { wch: 14 },
      { wch: 14 },
      { wch: 28 },
      { wch: 16 },
      { wch: 16 },
      { wch: 18 },
      { wch: 14 },
    ];
    worksheet["!merges"] = [
      { s: { r: 0, c: 0 }, e: { r: 0, c: DAILY_SHEET_LAST_COL } },
      { s: { r: summaryTitleRow, c: 0 }, e: { r: summaryTitleRow, c: DAILY_SHEET_LAST_COL } },
    ];

    const titleStyle = {
      font: { bold: true, sz: 14, color: { rgb: "1F2D3D" } },
      alignment: { horizontal: "center", vertical: "center" },
      fill: { fgColor: { rgb: "EAF3FF" } },
    };
    const headerStyle = {
      font: { bold: true, color: { rgb: "FFFFFF" } },
      fill: { fgColor: { rgb: "1976D2" } },
      alignment: { horizontal: "center", vertical: "center" },
      border: {
        top: { style: "thin", color: { rgb: "B0BEC5" } },
        bottom: { style: "thin", color: { rgb: "B0BEC5" } },
        left: { style: "thin", color: { rgb: "B0BEC5" } },
        right: { style: "thin", color: { rgb: "B0BEC5" } },
      },
    };
    const cellStyle = {
      alignment: { vertical: "center" },
      border: {
        top: { style: "thin", color: { rgb: "D0D7DE" } },
        bottom: { style: "thin", color: { rgb: "D0D7DE" } },
        left: { style: "thin", color: { rgb: "D0D7DE" } },
        right: { style: "thin", color: { rgb: "D0D7DE" } },
      },
    };
    const numberStyle = {
      ...cellStyle,
      alignment: { horizontal: "right", vertical: "center" },
      numFmt: "#,##0",
    };
    const summaryTitleStyle = {
      font: { bold: true, color: { rgb: "1F2D3D" } },
      fill: { fgColor: { rgb: "F1F8E9" } },
      alignment: { horizontal: "left", vertical: "center" },
    };

    for (let c = 0; c <= DAILY_SHEET_LAST_COL; c += 1) {
      const headerCell = XLSX.utils.encode_cell({ r: 2, c });
      if (worksheet[headerCell]) worksheet[headerCell].s = headerStyle;
    }

    for (let r = 3; r < 3 + dataRowsCount; r += 1) {
      for (let c = 0; c <= DAILY_SHEET_LAST_COL; c += 1) {
        const addr = XLSX.utils.encode_cell({ r, c });
        if (!worksheet[addr]) continue;
        worksheet[addr].s = c < 3 ? cellStyle : numberStyle;
      }
    }

    for (let r = summaryStartRow; r <= summaryStartRow + 3; r += 1) {
      for (let c = 0; c <= DAILY_SHEET_LAST_COL; c += 1) {
        const addr = XLSX.utils.encode_cell({ r, c });
        const cell = worksheet[addr];
        if (!cell) continue;
        cell.s = typeof cell.v === "number" ? numberStyle : cellStyle;
      }
    }

    if (worksheet["A1"]) worksheet["A1"].s = titleStyle;
    const summaryTitleAddr = XLSX.utils.encode_cell({ r: summaryTitleRow, c: 0 });
    if (worksheet[summaryTitleAddr]) worksheet[summaryTitleAddr].s = summaryTitleStyle;
    applyProjectExcelFont(worksheet);
  }, []);

  const addReportSheet = useCallback(
    (
      workbook: XLSX.WorkBook,
      sheetName: string,
      reportTitle: string,
      dailyRows: ShopDailyRow[],
    ) => {
      const reportSummary = calcSummary(dailyRows);
      const blank = ["", "", "", "", "", "", ""];
      const aoa: (string | number)[][] = [
        [reportTitle, ...blank.slice(1)],
        [...blank],
        [
          t("Date"),
          t("Shop code"),
          t("Shop Name"),
          t("2/F carton qty"),
          t("4/F carton qty"),
          t("Truck X carton qty"),
          t("Total carton qty"),
        ],
        ...dailyRows.map((row) => [
          row.date,
          row.shopCode,
          row.shopName,
          row.floor2F,
          row.floor4F,
          row.truckX,
          row.total,
        ]),
        [...blank],
        [t("Summary"), ...blank.slice(1)],
        [t("2/F carton qty"), "", "", reportSummary.floor2F, "", "", ""],
        [t("4/F carton qty"), "", "", "", reportSummary.floor4F, "", ""],
        [t("Truck X carton qty"), "", "", "", "", reportSummary.truckX, ""],
        [t("Total carton qty"), "", "", "", "", "", reportSummary.total],
      ];

      const worksheet = XLSX.utils.aoa_to_sheet(aoa);
      styleWorksheet(worksheet, dailyRows.length);
      XLSX.utils.book_append_sheet(workbook, worksheet, sheetName);
    },
    [calcSummary, styleWorksheet, t],
  );

  const addBreakdownSheet = useCallback(
    (
      workbook: XLSX.WorkBook,
      sheetName: string,
      reportTitle: string,
      shops: ShopQtyRow[],
      totalQty: number,
    ) => {
      const aoa: (string | number)[][] = [
        [reportTitle, "", "", ""],
        ["", "", "", ""],
        [t("Shop code"), t("Shop Name"), t("Cartons"), t("Share")],
        ...shops.map((row) => {
          const share = totalQty > 0 ? (row.qty / totalQty) * 100 : 0;
          return [row.code, row.name, row.qty, `${share.toFixed(1)}%`];
        }),
        ["", "", "", ""],
        [t("Total carton qty"), "", totalQty, ""],
      ];

      const worksheet = XLSX.utils.aoa_to_sheet(aoa);
      worksheet["!cols"] = [{ wch: 14 }, { wch: 28 }, { wch: 14 }, { wch: 12 }];
      worksheet["!merges"] = [{ s: { r: 0, c: 0 }, e: { r: 0, c: 3 } }];

      const titleStyle = {
        font: { bold: true, sz: 14, color: { rgb: "1F2D3D" } },
        alignment: { horizontal: "center", vertical: "center" },
        fill: { fgColor: { rgb: "EAF3FF" } },
      };
      const headerStyle = {
        font: { bold: true, color: { rgb: "FFFFFF" } },
        fill: { fgColor: { rgb: "1976D2" } },
        alignment: { horizontal: "center", vertical: "center" },
      };
      const cellStyle = {
        alignment: { vertical: "center" },
        border: {
          top: { style: "thin", color: { rgb: "D0D7DE" } },
          bottom: { style: "thin", color: { rgb: "D0D7DE" } },
          left: { style: "thin", color: { rgb: "D0D7DE" } },
          right: { style: "thin", color: { rgb: "D0D7DE" } },
        },
      };
      const numberStyle = {
        ...cellStyle,
        alignment: { horizontal: "right", vertical: "center" },
        numFmt: "#,##0",
      };

      if (worksheet["A1"]) worksheet["A1"].s = titleStyle;
      for (let c = 0; c <= 3; c += 1) {
        const headerCell = XLSX.utils.encode_cell({ r: 2, c });
        if (worksheet[headerCell]) worksheet[headerCell].s = headerStyle;
      }
      shops.forEach((_, index) => {
        const r = 3 + index;
        const codeAddr = XLSX.utils.encode_cell({ r, c: 0 });
        const nameAddr = XLSX.utils.encode_cell({ r, c: 1 });
        const qtyAddr = XLSX.utils.encode_cell({ r, c: 2 });
        const shareAddr = XLSX.utils.encode_cell({ r, c: 3 });
        if (worksheet[codeAddr]) worksheet[codeAddr].s = cellStyle;
        if (worksheet[nameAddr]) worksheet[nameAddr].s = cellStyle;
        if (worksheet[qtyAddr]) worksheet[qtyAddr].s = numberStyle;
        if (worksheet[shareAddr]) worksheet[shareAddr].s = cellStyle;
      });
      const totalRow = 4 + shops.length;
      const totalLabelAddr = XLSX.utils.encode_cell({ r: totalRow, c: 0 });
      const totalValueAddr = XLSX.utils.encode_cell({ r: totalRow, c: 2 });
      if (worksheet[totalLabelAddr]) worksheet[totalLabelAddr].s = cellStyle;
      if (worksheet[totalValueAddr]) worksheet[totalValueAddr].s = numberStyle;
      applyProjectExcelFont(worksheet);

      XLSX.utils.book_append_sheet(workbook, worksheet, sheetName.slice(0, 31));
    },
    [t],
  );

  const handleDownloadExcel = useCallback(async () => {
    if (exportInFlightRef.current || filteredExportInFlightRef.current) return;
    exportInFlightRef.current = true;
    setIsExporting(true);
    try {
      const allRecords =
        mode === "workbench"
          ? await fetchCompletedDoPickOrdersWorkbenchAll()
          : await fetchCompletedDoPickOrdersAll();

      const baseDate = dayjs(date || undefined).isValid() ? dayjs(date) : dayjs();
      const floorLabel = floor === ALL ? t("All floors") : floor;
      const laneLabel = lane === ALL ? t("All lanes") : lane;
      const shopLabel = shop === ALL ? t("All shops") : shop;
      const dateLabel = baseDate.format("YYYY-MM-DD");
      const monthPeriod = i18n.language?.startsWith("zh")
        ? baseDate.format("YYYY年MM月")
        : baseDate.format("YYYY-MM");
      const yearPeriod = i18n.language?.startsWith("zh")
        ? baseDate.format("YYYY年")
        : baseDate.format("YYYY");

      const last7Rows = buildDailyRowsFromRecords(
        allRecords,
        baseDate.subtract(6, "day"),
        baseDate,
        floor,
        lane,
        shop,
      );
      const monthRows = buildDailyRowsFromRecords(
        allRecords,
        baseDate.startOf("month"),
        baseDate.endOf("month"),
        floor,
        lane,
        shop,
      );
      const yearRows = buildDailyRowsFromRecords(
        allRecords,
        baseDate.startOf("year"),
        baseDate.endOf("year"),
        floor,
        lane,
        shop,
      );

      const workbook = XLSX.utils.book_new();
      addReportSheet(
        workbook,
        t("Last 7 days"),
        t("FG carton qty last 7 days title", { floor: floorLabel, date: dateLabel }),
        last7Rows,
      );
      addReportSheet(
        workbook,
        t("This month"),
        t("FG carton qty this month title", { floor: floorLabel, period: monthPeriod }),
        monthRows,
      );
      addReportSheet(
        workbook,
        t("This year"),
        t("FG carton qty this year title", { floor: floorLabel, period: yearPeriod }),
        yearRows,
      );

      const fileBits = [
        "FG_carton_qty",
        floorLabel.replace("/", ""),
        lane === ALL ? "" : laneLabel,
        shop === ALL ? "" : shopLabel,
        dateLabel,
      ].filter(Boolean);

      XLSX.writeFile(workbook, `${fileBits.join("_")}.xlsx`);
    } finally {
      setIsExporting(false);
      exportInFlightRef.current = false;
    }
  }, [mode, date, floor, lane, shop, buildDailyRowsFromRecords, addReportSheet, t, i18n.language]);

  const handleDownloadFilteredExcel = useCallback(async () => {
    if (filteredExportInFlightRef.current || exportInFlightRef.current) return;
    filteredExportInFlightRef.current = true;
    setIsExportingFiltered(true);
    try {
      const baseDate = dayjs(date || undefined).isValid() ? dayjs(date) : dayjs();
      const floorLabel = floor === ALL ? t("All floors") : floor;
      const laneLabel = lane === ALL ? t("All lanes") : shortLaneLabel(lane);
      const shopLabel =
        shop === ALL ? t("All shops") : isShopGroupValue(shop) ? shop : formatShopLabel(shop, "");
      const dateLabel = baseDate.format("YYYY-MM-DD");
      const reportTitle = t("FG carton qty filtered title", {
        floor: floorLabel,
        lane: laneLabel,
        shop: shopLabel,
        date: dateLabel,
      });

      const dailyRows = buildDailyRowsFromRecords(
        records,
        baseDate.startOf("day"),
        baseDate.endOf("day"),
        floor,
        lane,
        shop,
      );
      const filteredTotal = calcSummary(dailyRows).total;
      const shopRows = buildShopQtyRows(
        records.filter((record) => recordMatchesFilters(record, floor, lane, shop)),
      );

      const workbook = XLSX.utils.book_new();
      addReportSheet(workbook, t("Filtered"), reportTitle, dailyRows);
      addBreakdownSheet(
        workbook,
        t("Breakdown"),
        t("Cartons by shop"),
        shopRows,
        filteredTotal,
      );

      const fileBits = [
        "FG_carton_qty_filtered",
        floorLabel.replace("/", ""),
        lane === ALL ? "" : laneLabel,
        shop === ALL ? "" : shopLabel,
        dateLabel,
      ].filter(Boolean);

      XLSX.writeFile(workbook, `${fileBits.join("_")}.xlsx`);
    } finally {
      setIsExportingFiltered(false);
      filteredExportInFlightRef.current = false;
    }
  }, [
    date,
    floor,
    lane,
    shop,
    records,
    buildDailyRowsFromRecords,
    addReportSheet,
    addBreakdownSheet,
    calcSummary,
    t,
  ]);

  const isAnyExporting = isExporting || isExportingFiltered;

  return (
    <Box sx={{ width: "100%" }}>
      <Stack direction="row" alignItems="center" justifyContent="space-between" sx={{ mb: 2 }}>
        <Typography variant="h6">{t("FG Carton Qty")}</Typography>
        <Stack direction="row" spacing={1} alignItems="center" flexWrap="wrap" useFlexGap>
          <Button
            variant="outlined"
            onClick={resetFilters}
            disabled={loading || !filtersAreActive}
          >
            {t("Reset filters")}
          </Button>
          <Tooltip title={t("Download this view Excel hint")}>
            <span>
              <Button
                variant="outlined"
                onClick={handleDownloadFilteredExcel}
                disabled={loading || isAnyExporting}
              >
                {isExportingFiltered ? t("Exporting...") : t("Download this view Excel")}
              </Button>
            </span>
          </Tooltip>
          <Tooltip title={t("Download period Excel hint")}>
            <span>
              <Button
                variant="contained"
                onClick={handleDownloadExcel}
                disabled={loading || isAnyExporting}
              >
                {isExporting ? t("Exporting...") : t("Download period Excel")}
              </Button>
            </span>
          </Tooltip>
        </Stack>
      </Stack>

      {error && (
        <Alert severity="error" sx={{ mb: 2 }}>
          {error}
        </Alert>
      )}

      <Stack spacing={2}>
        <Grid container spacing={1.5}>
          <Grid item xs={12} sm={6} md={3}>
            <TextField
              select
              fullWidth
              size="small"
              label={t("Floor")}
              value={floor}
              onChange={(event) => setFloor(event.target.value as FloorFilter)}
            >
              <MenuItem value={ALL}>{t("All")}</MenuItem>
              <MenuItem value="2/F">2/F</MenuItem>
              <MenuItem value="4/F">4/F</MenuItem>
            </TextField>
          </Grid>
          <Grid item xs={12} sm={6} md={3}>
            <SearchableFilterSelect
              label={t("Lane")}
              options={laneFilterOptions}
              value={lane}
              onChange={setLane}
            />
          </Grid>
          <Grid item xs={12} sm={6} md={3}>
            <SearchableFilterSelect
              label={t("Shop Code")}
              options={shopFilterOptions}
              value={shopFilterValue}
              onChange={setShop}
            />
          </Grid>
          <Grid item xs={12} sm={6} md={3}>
            <LocalizationProvider
              dateAdapter={AdapterDayjs}
              adapterLocale={i18n.language?.startsWith("zh") ? "zh-hk" : "en"}
            >
              <DatePicker
                label={t("Date")}
                format={OUTPUT_DATE_FORMAT}
                value={dayjs(date).isValid() ? dayjs(date) : null}
                onChange={(newValue) => {
                  if (newValue && dayjs(newValue).isValid()) {
                    setDate(dayjs(newValue).format(OUTPUT_DATE_FORMAT));
                  }
                }}
                slotProps={{
                  textField: { size: "small", fullWidth: true },
                }}
              />
            </LocalizationProvider>
          </Grid>
        </Grid>

        {loading ? (
          <Box sx={{ py: 6, display: "flex", justifyContent: "center" }}>
            <CircularProgress />
          </Box>
        ) : (
          <Stack spacing={1.5}>
            <Paper sx={{ px: 1, py: 1 }}>
              <Grid container>
                {[
                  { label: t("2/F carton qty"), value: summary.floor2F },
                  { label: t("4/F carton qty"), value: summary.floor4F },
                  { label: t("Truck X carton qty"), value: summary.truckX },
                  { label: t("Total carton qty"), value: summary.total },
                ].map((kpi, index) => (
                  <Grid
                    item
                    xs={6}
                    md={3}
                    key={kpi.label}
                    sx={{
                      px: 1.5,
                      py: 0.5,
                      borderRight: { md: index < 3 ? "1px solid" : "none" },
                      borderBottom: { xs: index < 2 ? "1px solid" : "none", md: "none" },
                      borderColor: { xs: "divider", md: "divider" },
                    }}
                  >
                    <Typography variant="caption" color="text.secondary">
                      {kpi.label}
                    </Typography>
                    <Typography variant="h6" sx={{ fontVariantNumeric: "tabular-nums", lineHeight: 1.3 }}>
                      {kpi.value.toLocaleString(numberLocale)}
                    </Typography>
                  </Grid>
                ))}
              </Grid>
            </Paper>

            <Paper sx={{ p: 1.5 }}>
              <Stack
                direction="row"
                alignItems="center"
                justifyContent="space-between"
                spacing={1}
                sx={{ mb: 1 }}
              >
                <Box sx={{ minWidth: 0 }}>
                  <Typography variant="subtitle2" color="text.secondary">
                    {breakdownCaption}
                  </Typography>
                  {chartClicksEnabled && (
                    <Typography variant="caption" color="text.secondary" sx={{ display: "block" }}>
                      {t("Click a row to filter")}
                    </Typography>
                  )}
                </Box>
                <Button
                  size="small"
                  variant="outlined"
                  startIcon={<ArrowBackIcon />}
                  onClick={goBackChartLevel}
                  disabled={!chartCanGoBack}
                >
                  {t("Back to previous level")}
                </Button>
              </Stack>
              {breakdownRows.length === 0 ? (
                <Typography sx={{ py: 3 }} color="text.secondary">
                  {t("No data available")}
                </Typography>
              ) : (
                <Box>
                  {breakdownRows.map((row) => {
                    const active = isBreakdownRowActive(row);
                    const share = summary.total > 0 ? (row.qty / summary.total) * 100 : 0;
                    const barWidth =
                      row.qty <= 0 ? "0%" : `${(row.qty / chartMaxQty) * 100}%`;
                    return (
                      <Box
                        key={row.key}
                        role={chartClicksEnabled ? "button" : undefined}
                        tabIndex={chartClicksEnabled ? 0 : undefined}
                        onClick={() => {
                          if (chartClicksEnabled) applyBreakdownClick(row);
                        }}
                        onKeyDown={(event) => {
                          if (!chartClicksEnabled) return;
                          if (event.key === "Enter" || event.key === " ") {
                            event.preventDefault();
                            applyBreakdownClick(row);
                          }
                        }}
                        title={`${row.label}: ${row.qty.toLocaleString(numberLocale)} (${share.toFixed(1)}%)`}
                        sx={{
                          height: CHART_ROW_H,
                          display: "grid",
                          gridTemplateColumns: {
                            xs: "132px minmax(0, 1fr) 84px",
                            sm: "200px minmax(0, 1fr) 84px",
                            md: "280px minmax(0, 1fr) 84px",
                          },
                          columnGap: 1,
                          alignItems: "center",
                          minWidth: 0,
                          cursor: chartClicksEnabled ? "pointer" : "default",
                          borderRadius: 1,
                          px: 0.5,
                          bgcolor: active ? "action.selected" : "transparent",
                          "&:hover": chartClicksEnabled ? { bgcolor: "action.hover" } : undefined,
                        }}
                      >
                        <Typography
                          component="span"
                          noWrap
                          title={row.label}
                          sx={{
                            minWidth: 0,
                            width: "100%",
                            fontWeight: 700,
                            fontSize: 13,
                            lineHeight: `${CHART_ROW_H}px`,
                            color: "text.primary",
                            textAlign: "left",
                          }}
                        >
                          {row.label}
                        </Typography>
                        <Box
                          sx={{
                            height: "100%",
                            display: "flex",
                            alignItems: "center",
                            minWidth: 0,
                          }}
                        >
                          <Box
                            sx={{
                              height: 22,
                              width: barWidth,
                              minWidth: row.qty > 0 ? 4 : 0,
                              bgcolor: "#1976d2",
                              borderRadius: "4px",
                            }}
                          />
                        </Box>
                        <Box
                          sx={{
                            height: 24,
                            display: "flex",
                            alignItems: "center",
                            justifyContent: "center",
                            px: 0.75,
                            borderRadius: 0.5,
                            bgcolor: "#fff",
                            border: "1px solid #90a4ae",
                            color: "#102a43",
                            fontWeight: 800,
                            fontSize: 15,
                            lineHeight: 1,
                            boxShadow: "0 1px 3px rgba(0,0,0,0.22)",
                          }}
                        >
                          {row.qty.toLocaleString(numberLocale)}
                        </Box>
                      </Box>
                    );
                  })}
                </Box>
              )}
            </Paper>
          </Stack>
        )}
      </Stack>
    </Box>
  );
};

export default FinishedGoodCartonDashboardTab;