"use client";

import React, { useCallback, useEffect, useMemo, useRef, useState } from "react";
import {
  Alert,
  Box,
  Button,
  Chip,
  FormControl,
  InputLabel,
  MenuItem,
  Select,
  Stack,
  Typography,
  Paper,
  CircularProgress,
  SelectChangeEvent,
  Dialog,
  DialogTitle,
  DialogContent,
  DialogActions,
  TextField,
  Snackbar,
  Switch,
  Table,
  TableBody,
  TableCell,
  TableContainer,
  TableHead,
  TableRow,
  TableSortLabel,
  Tooltip,
} from "@mui/material";
import ChevronLeft from "@mui/icons-material/ChevronLeft";
import ChevronRight from "@mui/icons-material/ChevronRight";
import Settings from "@mui/icons-material/Settings";
import Print from "@mui/icons-material/Print";
import Download from "@mui/icons-material/Download";
import {
  buildOnPackJobOrdersPayload,
  checkPrinterStatus,
  downloadOnPackQrZip,
  downloadOnPackQrZipWithExpiry,
  downloadOnPackTextQrZip,
  downloadOnPackTextQrZipWithExpiry,
  fetchJobOrders,
  fetchOnPackExpiryCodes,
  addOnPackExpiryCode,
  updateOnPackExpiryCode,
  deleteOnPackExpiryCode,
  fetchOnPackSupportedCatalog,
  JobOrderListItem,
  OnPackExpiryItemCodeDto,
} from "@/app/api/bagPrint/actions";
import dayjs from "dayjs";
import { useSession } from "next-auth/react";
import { SessionWithTokens } from "@/config/authConfig";
import { NEXT_PUBLIC_API_URL } from "@/config/api";
import { clientAuthFetch } from "@/app/utils/clientAuthFetch";

// Light blue theme (matching Python Bag1)
const BG_TOP = "#E8F4FC";
const BG_LIST = "#D4E8F7";
const BG_ROW = "#C5E1F5";
const BG_ROW_SELECTED = "#6BB5FF";
const BG_STATUS_ERROR = "#FFCCCB";
const BG_STATUS_OK = "#90EE90";
const FG_STATUS_ERROR = "#B22222";
const FG_STATUS_OK = "#006400";

const PRINTER_OPTIONS = [
  { value: "dataflex", label: "打袋機 DataFlex" },
  { value: "laser", label: "激光機" },
];

const REFRESH_MS = 60 * 1000;
const PRINTER_CHECK_MS = 60 * 1000;
const PRINTER_RETRY_MS = 30 * 1000;
const SETTINGS_KEY = "bagPrint_settings";
const ONPACK_ADMIN_USERNAME = "2fi";

/** Login username from backend JWT `sub` (UserDetails.username). */
function loginUsernameFromSession(session: SessionWithTokens | null | undefined): string {
  const token = session?.accessToken?.trim();
  if (token) {
    try {
      const parts = token.split(".");
      if (parts.length >= 2) {
        const b64 = parts[1].replace(/-/g, "+").replace(/_/g, "/");
        const padded = b64 + "=".repeat((4 - (b64.length % 4)) % 4);
        const payload = JSON.parse(atob(padded)) as { sub?: unknown };
        if (typeof payload.sub === "string" && payload.sub.trim()) {
          return payload.sub.trim();
        }
      }
    } catch {
      // fall through to display name
    }
  }
  return (session?.user?.name ?? "").trim();
}

const DEFAULT_SETTINGS = {
  dabag_ip: "",
  dabag_port: "3008",
  laser_ip: "192.168.17.10",
  laser_port: "45678",
};

function loadSettings(): typeof DEFAULT_SETTINGS {
  if (typeof window === "undefined") return DEFAULT_SETTINGS;
  try {
    const s = localStorage.getItem(SETTINGS_KEY);
    if (s) return { ...DEFAULT_SETTINGS, ...JSON.parse(s) };
  } catch {}
  return DEFAULT_SETTINGS;
}

function saveSettings(s: typeof DEFAULT_SETTINGS) {
  if (typeof window === "undefined") return;
  try {
    localStorage.setItem(SETTINGS_KEY, JSON.stringify(s));
  } catch {}
}

function formatQty(val: number | null | undefined): string {
  if (val == null) return "—";
  try {
    const n = Number(val);
    if (Number.isInteger(n)) return n.toLocaleString();
    return n.toLocaleString(undefined, { minimumFractionDigits: 0, maximumFractionDigits: 2 }).replace(/\.?0+$/, "");
  } catch {
    return String(val);
  }
}

function getBatch(jo: JobOrderListItem): string {
  return (jo.lotNo || "—").trim() || "—";
}

function expiryCodeSet(rows: OnPackExpiryItemCodeDto[]): Set<string> {
  return new Set(rows.map((r) => r.itemCode.trim().toUpperCase()).filter(Boolean));
}

function daysLabel(value: number | null | undefined): string {
  return value == null ? "未設" : String(value);
}

type ExpirySortKey =
  | "itemCode"
  | "name"
  | "defaultDays"
  | "minus18Days"
  | "useMinus18"
  | "effectiveDays";

function displayName(row: OnPackExpiryItemCodeDto): string {
  return (row.printName || row.defaultPrintName || "").trim();
}

function cmpText(a: string, b: string): number {
  return a.localeCompare(b, "zh-Hant", { numeric: true, sensitivity: "base" });
}

/** Null (未設) sorts first on asc so unset rows are easy to find. */
function cmpDays(a: number | null | undefined, b: number | null | undefined): number {
  const av = a == null ? Number.NEGATIVE_INFINITY : a;
  const bv = b == null ? Number.NEGATIVE_INFINITY : b;
  return av - bv;
}

function skippedExpirySnackbar(okMessage: string, skipped: string[]): {
  open: true;
  message: string;
  severity: "success" | "warning";
  duration: number;
} {
  if (skipped.length === 0) {
    return { open: true, message: okMessage, severity: "success", duration: 3000 };
  }
  return {
    open: true,
    message: `${okMessage}。以下品號沒有到期日，已略過不入 ZIP：${skipped.join("、")}。請到設定 → 物品預設保質期新增。`,
    severity: "warning",
    duration: 10000,
  };
}

function sortExpiryRows(
  rows: OnPackExpiryItemCodeDto[],
  key: ExpirySortKey,
  dir: "asc" | "desc",
): OnPackExpiryItemCodeDto[] {
  const sign = dir === "asc" ? 1 : -1;
  return [...rows].sort((a, b) => {
    let cmp = 0;
    switch (key) {
      case "itemCode":
        cmp = cmpText(a.itemCode, b.itemCode);
        break;
      case "name":
        cmp = cmpText(displayName(a), displayName(b));
        break;
      case "defaultDays":
        cmp = cmpDays(a.defaultDays, b.defaultDays);
        break;
      case "minus18Days":
        cmp = cmpDays(a.minus18Days, b.minus18Days);
        break;
      case "useMinus18":
        cmp = Number(a.useMinus18 === true) - Number(b.useMinus18 === true);
        break;
      case "effectiveDays":
        cmp = cmpDays(a.effectiveDays, b.effectiveDays);
        break;
    }
    if (cmp === 0) cmp = cmpText(a.itemCode, b.itemCode);
    return cmp * sign;
  });
}

const BagPrintSearch: React.FC = () => {
  const { data: session } = useSession() as { data: SessionWithTokens | null };
  const canSeeOnPackAdmin =
    loginUsernameFromSession(session).toLowerCase() === ONPACK_ADMIN_USERNAME;
  const [planDate, setPlanDate] = useState(() => dayjs().format("YYYY-MM-DD"));
  const [jobOrders, setJobOrders] = useState<JobOrderListItem[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [connected, setConnected] = useState(false);
  const [printer, setPrinter] = useState<string>("dataflex");
  const [selectedId, setSelectedId] = useState<number | null>(null);
  const [printDialogOpen, setPrintDialogOpen] = useState(false);
  const [printTarget, setPrintTarget] = useState<JobOrderListItem | null>(null);
  const [printCount, setPrintCount] = useState(0);
  const [printContinuous, setPrintContinuous] = useState(false);
  const [printing, setPrinting] = useState(false);
  const [settingsOpen, setSettingsOpen] = useState(false);
  const [templatesOpen, setTemplatesOpen] = useState(false);
  const [expiryCodes, setExpiryCodes] = useState<OnPackExpiryItemCodeDto[]>([]);
  const [expiryCodeInput, setExpiryCodeInput] = useState("");
  const [expiryCodesLoading, setExpiryCodesLoading] = useState(false);
  const [nameDrafts, setNameDrafts] = useState<Record<string, string>>({});
  const [expirySortKey, setExpirySortKey] = useState<ExpirySortKey>("itemCode");
  const [expirySortDir, setExpirySortDir] = useState<"asc" | "desc">("asc");
  const [lemonCodeSet, setLemonCodeSet] = useState<Set<string>>(() => new Set());
  const expiryAddRef = useRef(false);
  const expiryDeleteRef = useRef(false);
  const expirySaveRef = useRef<Set<string>>(new Set());
  const expiryToggleRef = useRef<Set<string>>(new Set());
  const [snackbar, setSnackbar] = useState<{
    open: boolean;
    message: string;
    severity?: "success" | "info" | "warning" | "error";
    duration?: number;
  }>({ open: false, message: "" });
  const [settings, setSettings] = useState(DEFAULT_SETTINGS);
  const [printerConnected, setPrinterConnected] = useState(false);
  const [printerMessage, setPrinterMessage] = useState("列印機未連接");
  const [downloadingOnPack, setDownloadingOnPack] = useState(false);
  const [downloadingOnPackExp, setDownloadingOnPackExp] = useState(false);
  const [downloadingOnPackText, setDownloadingOnPackText] = useState(false);
  const [downloadingOnPackTextExp, setDownloadingOnPackTextExp] = useState(false);
  const downloadingOnPackRef = useRef(false);
  const downloadingOnPackExpRef = useRef(false);
  const downloadingOnPackTextRef = useRef(false);
  const downloadingOnPackTextExpRef = useRef(false);

  useEffect(() => {
    setSettings(loadSettings());
  }, []);

  const loadJobOrders = useCallback(async (fromUserChange = false) => {
    setLoading(true);
    setError(null);
    try {
      const data = await fetchJobOrders(planDate);
      setJobOrders(data);
      setConnected(true);
      if (fromUserChange) setSelectedId(null);
    } catch (e) {
      setError(e instanceof Error ? e.message : "連接不到服務器");
      setConnected(false);
      setJobOrders([]);
    } finally {
      setLoading(false);
    }
  }, [planDate]);

  useEffect(() => {
    loadJobOrders(true);
  }, [planDate]);

  useEffect(() => {
    if (!connected) return;
    const id = setInterval(() => loadJobOrders(false), REFRESH_MS);
    return () => clearInterval(id);
  }, [connected, loadJobOrders]);

  const checkCurrentPrinter = useCallback(async () => {
    try {
      const request =
        printer === "dataflex"
          ? {
              printerType: "dataflex" as const,
              printerIp: settings.dabag_ip,
              printerPort: Number(settings.dabag_port || 3008),
            }
          : {
              printerType: "laser" as const,
              printerIp: settings.laser_ip,
              printerPort: Number(settings.laser_port || 45678),
            };

      const result = await checkPrinterStatus(request);
      setPrinterConnected(result.connected);
      setPrinterMessage(result.message);
    } catch (e) {
      setPrinterConnected(false);
      setPrinterMessage(e instanceof Error ? e.message : "列印機狀態檢查失敗");
    }
  }, [printer, settings]);

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

  useEffect(() => {
    const intervalMs = printerConnected ? PRINTER_CHECK_MS : PRINTER_RETRY_MS;
    const id = setInterval(() => {
      checkCurrentPrinter();
    }, intervalMs);

    return () => clearInterval(id);
  }, [printerConnected, checkCurrentPrinter]);

  const goPrevDay = () => {
    setPlanDate((d) => dayjs(d).subtract(1, "day").format("YYYY-MM-DD"));
  };

  const goNextDay = () => {
    setPlanDate((d) => dayjs(d).add(1, "day").format("YYYY-MM-DD"));
  };

  const handlePrinterChange = (e: SelectChangeEvent<string>) => {
    setPrinter(e.target.value);
  };

  const handleRowClick = (jo: JobOrderListItem) => {
    setSelectedId(jo.id);
    const batch = getBatch(jo);
    const itemCode = jo.itemCode || "—";
    const itemName = jo.itemName || "—";
    setSnackbar({ open: true, message: `已點選：批次 ${batch} 品號 ${itemCode} ${itemName}`, severity: "info" });

    // Align with Bag2.py "click row -> ask bag count -> print" for DataFlex.
    if (printer === "dataflex") {
      setPrintTarget(jo);
      setPrintCount(0);
      setPrintContinuous(false);
      setPrintDialogOpen(true);
    }
  };

  const confirmPrintDataFlex = async () => {
    if (!printTarget) return;
    if (printer !== "dataflex") {
      setSnackbar({ open: true, message: "此頁目前只支援打袋機 DataFlex 列印", severity: "error" });
      return;
    }

    if (!printContinuous && printCount < 1) {
      setSnackbar({ open: true, message: "請先按 +50、+10、+5 或 +1 選擇數量。", severity: "error" });
      return;
    }

    const qty = printContinuous ? -1 : printCount;
    const printerIp = settings.dabag_ip;
    const printerPort = Number(settings.dabag_port || 3008);

    if (!printerIp) {
      setSnackbar({ open: true, message: "請先在設定中填寫打袋機 DataFlex 的 IP。", severity: "error" });
      return;
    }

    setPrinting(true);
    try {
      const resp = await clientAuthFetch(`${NEXT_PUBLIC_API_URL}/plastic/print-dataflex`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          itemCode: printTarget.itemCode || "—",
          itemName: printTarget.itemName || "—",
          lotNo: printTarget.lotNo || "—",
          // DataFlex zpl (Bag2.py) only needs itemId + stockInLineId for QR payload (optional).
          itemId: printTarget.itemId,
          stockInLineId: printTarget.stockInLineId,
          printerIp,
          printerPort,
          printQty: qty,
        }),
      });

      if (resp.status === 401 || resp.status === 403) return;

      if (!resp.ok) {
        const msg = await resp.text().catch(() => "");
        setSnackbar({
          open: true,
          message: `DataFlex 列印失敗（狀態碼 ${resp.status}）。${msg ? msg.slice(0, 120) : ""}`,
          severity: "error",
        });
        return;
      }

      const batch = getBatch(printTarget);
      const printedText = qty === -1 ? "連續 (C)" : `${qty}`;
      setSnackbar({ open: true, message: `已送出列印：批次 ${batch} x ${printedText}`, severity: "success" });
      setPrintDialogOpen(false);
    } catch (e) {
      setSnackbar({ open: true, message: e instanceof Error ? e.message : "DataFlex 列印失敗", severity: "error" });
    } finally {
      setPrinting(false);
    }
  };

  const handleDownloadOnPackQr = async () => {
    if (downloadingOnPackRef.current) return;
    const onPackJobOrders = buildOnPackJobOrdersPayload(jobOrders);

    if (onPackJobOrders.length === 0) {
      setSnackbar({ open: true, message: "當日沒有可下載的 job order", severity: "error" });
      return;
    }

    downloadingOnPackRef.current = true;
    setDownloadingOnPack(true);
    try {
      const blob = await downloadOnPackQrZip({
        jobOrders: onPackJobOrders,
      });

      const url = window.URL.createObjectURL(blob);
      const link = document.createElement("a");
      link.href = url;
      link.setAttribute("download", `onpack_qr_${planDate}.zip`);
      document.body.appendChild(link);
      link.click();
      link.remove();
      window.URL.revokeObjectURL(url);

      setSnackbar({ open: true, message: "OnPack QR code ZIP 已下載", severity: "success" });
    } catch (e) {
      setSnackbar({
        open: true,
        message: e instanceof Error ? e.message : "下載 OnPack QR code 失敗",
        severity: "error",
      });
    } finally {
      setDownloadingOnPack(false);
      downloadingOnPackRef.current = false;
    }
  };

  const handleDownloadOnPackQrWithExpiry = async () => {
    if (downloadingOnPackExpRef.current) return;
    const onPackJobOrders = buildOnPackJobOrdersPayload(jobOrders);

    if (onPackJobOrders.length === 0) {
      setSnackbar({ open: true, message: "當日沒有可下載的 job order", severity: "error" });
      return;
    }

    downloadingOnPackExpRef.current = true;
    setDownloadingOnPackExp(true);
    try {
      const { blob, skippedWithoutExpiry } = await downloadOnPackQrZipWithExpiry({
        jobOrders: onPackJobOrders,
        planDate,
      });

      const url = window.URL.createObjectURL(blob);
      const link = document.createElement("a");
      link.href = url;
      link.setAttribute("download", `onpack_qr_exp_${planDate}.zip`);
      document.body.appendChild(link);
      link.click();
      link.remove();
      window.URL.revokeObjectURL(url);

      setSnackbar(skippedExpirySnackbar("OnPack 汁水機（含到期日）ZIP 已下載", skippedWithoutExpiry));
    } catch (e) {
      setSnackbar({
        open: true,
        message: e instanceof Error ? e.message : "下載 OnPack 汁水機（含到期日）失敗",
        severity: "error",
      });
    } finally {
      setDownloadingOnPackExp(false);
      downloadingOnPackExpRef.current = false;
    }
  };

  const handleDownloadOnPackTextQr = async () => {
    if (downloadingOnPackTextRef.current) return;
    const onPackJobOrders = buildOnPackJobOrdersPayload(jobOrders);

    if (onPackJobOrders.length === 0) {
      setSnackbar({ open: true, message: "當日沒有可下載的 job order", severity: "error" });
      return;
    }

    downloadingOnPackTextRef.current = true;
    setDownloadingOnPackText(true);
    try {
      const blob = await downloadOnPackTextQrZip({
        jobOrders: onPackJobOrders,
      });

      const url = window.URL.createObjectURL(blob);
      const link = document.createElement("a");
      link.href = url;
      link.setAttribute("download", `onpack2023_lemon_qr_${planDate}.zip`);
      document.body.appendChild(link);
      link.click();
      link.remove();
      window.URL.revokeObjectURL(url);

      setSnackbar({ open: true, message: "OnPack2023檸檬機 ZIP 已下載", severity: "success" });
    } catch (e) {
      setSnackbar({
        open: true,
        message: e instanceof Error ? e.message : "下載 OnPack2023檸檬機 失敗",
        severity: "error",
      });
    } finally {
      setDownloadingOnPackText(false);
      downloadingOnPackTextRef.current = false;
    }
  };

  const handleDownloadOnPackTextQrWithExpiry = async () => {
    if (downloadingOnPackTextExpRef.current) return;
    const onPackJobOrders = buildOnPackJobOrdersPayload(jobOrders);

    if (onPackJobOrders.length === 0) {
      setSnackbar({ open: true, message: "當日沒有可下載的 job order", severity: "error" });
      return;
    }

    downloadingOnPackTextExpRef.current = true;
    setDownloadingOnPackTextExp(true);
    try {
      const { blob, skippedWithoutExpiry } = await downloadOnPackTextQrZipWithExpiry({
        jobOrders: onPackJobOrders,
        planDate,
      });

      const url = window.URL.createObjectURL(blob);
      const link = document.createElement("a");
      link.href = url;
      link.setAttribute("download", `onpack2023_lemon_qr_exp_${planDate}.zip`);
      document.body.appendChild(link);
      link.click();
      link.remove();
      window.URL.revokeObjectURL(url);

      setSnackbar(skippedExpirySnackbar("OnPack2023檸檬機（含到期日）ZIP 已下載", skippedWithoutExpiry));
    } catch (e) {
      setSnackbar({
        open: true,
        message: e instanceof Error ? e.message : "下載 OnPack2023檸檬機（含到期日）失敗",
        severity: "error",
      });
    } finally {
      setDownloadingOnPackTextExp(false);
      downloadingOnPackTextExpRef.current = false;
    }
  };

  const loadExpiryCodes = useCallback(async (notify = false) => {
    setExpiryCodesLoading(true);
    try {
      const rows = await fetchOnPackExpiryCodes("juice");
      setExpiryCodes(rows);
      setNameDrafts(
        Object.fromEntries(
          rows.map((r) => [r.itemCode, r.printName || r.defaultPrintName || ""]),
        ),
      );
    } catch (e) {
      if (notify) {
        setSnackbar({
          open: true,
          message: e instanceof Error ? e.message : "讀取到期日 ZIP 品號失敗",
          severity: "error",
        });
      }
    } finally {
      setExpiryCodesLoading(false);
    }
  }, []);

  useEffect(() => {
    void loadExpiryCodes();
  }, [loadExpiryCodes]);

  useEffect(() => {
    void (async () => {
      try {
        const catalog = await fetchOnPackSupportedCatalog();
        setLemonCodeSet(
          new Set(
            (catalog.lemon ?? [])
              .filter((row) => row.printable)
              .map((row) => row.itemCode.trim().toUpperCase())
              .filter(Boolean),
          ),
        );
      } catch {
        /* 檸檬機標籤可沒有；不擋畫面 */
      }
    })();
  }, []);

  useEffect(() => {
    if (!templatesOpen) return;
    void loadExpiryCodes(true);
  }, [templatesOpen, loadExpiryCodes]);

  const handleAddExpiryCode = async () => {
    if (expiryAddRef.current) return;
    const itemCode = expiryCodeInput.trim();
    if (!itemCode) {
      setSnackbar({ open: true, message: "請先填寫品號", severity: "error" });
      return;
    }
    expiryAddRef.current = true;
    try {
      await addOnPackExpiryCode(itemCode, "juice");
      setExpiryCodeInput("");
      setSnackbar({ open: true, message: `已加入到期日 ZIP：${itemCode.toUpperCase()}`, severity: "success" });
      await loadExpiryCodes();
    } catch (e) {
      setSnackbar({
        open: true,
        message: e instanceof Error ? e.message : "新增到期日 ZIP 品號失敗",
        severity: "error",
      });
    } finally {
      expiryAddRef.current = false;
    }
  };

  const handleDeleteExpiryCode = async (itemCode: string) => {
    if (expiryDeleteRef.current) return;
    expiryDeleteRef.current = true;
    try {
      await deleteOnPackExpiryCode(itemCode, "juice");
      setSnackbar({ open: true, message: `已從到期日 ZIP 移除 ${itemCode}`, severity: "success" });
      await loadExpiryCodes();
    } catch (e) {
      setSnackbar({
        open: true,
        message: e instanceof Error ? e.message : "刪除到期日 ZIP 品號失敗",
        severity: "error",
      });
    } finally {
      expiryDeleteRef.current = false;
    }
  };

  const applyExpiryRow = (updated: OnPackExpiryItemCodeDto) => {
    setExpiryCodes((prev) => prev.map((r) => (r.itemCode === updated.itemCode ? updated : r)));
    setNameDrafts((prev) => ({
      ...prev,
      [updated.itemCode]: updated.printName || updated.defaultPrintName || "",
    }));
  };

  const handleSaveExpiryPrintName = async (itemCode: string) => {
    if (expirySaveRef.current.has(itemCode)) return;
    expirySaveRef.current.add(itemCode);
    try {
      const updated = await updateOnPackExpiryCode({
        itemCode,
        machine: "juice",
        printName: (nameDrafts[itemCode] ?? "").trim(),
      });
      applyExpiryRow(updated);
      setSnackbar({ open: true, message: `已儲存 ${itemCode} 列印名稱`, severity: "success" });
    } catch (e) {
      setSnackbar({
        open: true,
        message: e instanceof Error ? e.message : "儲存列印名稱失敗",
        severity: "error",
      });
    } finally {
      expirySaveRef.current.delete(itemCode);
    }
  };

  const handleToggleUseMinus18 = async (itemCode: string, useMinus18: boolean) => {
    if (expiryToggleRef.current.has(itemCode)) return;
    expiryToggleRef.current.add(itemCode);
    try {
      const updated = await updateOnPackExpiryCode({
        itemCode,
        machine: "juice",
        useMinus18,
      });
      applyExpiryRow(updated);
      setSnackbar({
        open: true,
        message: useMinus18 ? `已改用 ${itemCode} 的 -18 天數` : `已改用 ${itemCode} 的冷藏天數`,
        severity: "success",
      });
    } catch (e) {
      setSnackbar({
        open: true,
        message: e instanceof Error ? e.message : "更新保質期旗標失敗",
        severity: "error",
      });
    } finally {
      expiryToggleRef.current.delete(itemCode);
    }
  };

  const juiceExpiryCodeSet = expiryCodeSet(expiryCodes);
  const sortedExpiryCodes = useMemo(
    () => sortExpiryRows(expiryCodes, expirySortKey, expirySortDir),
    [expiryCodes, expirySortKey, expirySortDir],
  );

  const onExpirySort = (key: ExpirySortKey) => {
    if (expirySortKey === key) {
      setExpirySortDir((d) => (d === "asc" ? "desc" : "asc"));
    } else {
      setExpirySortKey(key);
      setExpirySortDir("asc");
    }
  };

  return (
    <Box sx={{ minHeight: "70vh", display: "flex", flexDirection: "column" }}>
      {/* Top: date nav + printer + settings */}
      <Paper sx={{ p: 2, mb: 2, backgroundColor: BG_TOP }}>
        <Stack direction="row" alignItems="center" justifyContent="space-between" flexWrap="wrap" gap={2}>
          <Stack direction="row" alignItems="center" spacing={2}>
            <Button variant="outlined" startIcon={<ChevronLeft />} onClick={goPrevDay}>
              前一天
            </Button>
            <TextField
              type="date"
              value={planDate}
              onChange={(e) => setPlanDate(e.target.value)}
              size="small"
              sx={{ width: 160 }}
              InputLabelProps={{ shrink: true }}
            />
            <Button variant="outlined" endIcon={<ChevronRight />} onClick={goNextDay}>
              後一天
            </Button>
          </Stack>
          <Stack direction="row" alignItems="center" spacing={2}>
            <Button variant="outlined" startIcon={<Settings />} onClick={() => setSettingsOpen(true)}>
              設定
            </Button>
            {canSeeOnPackAdmin && (
              <Button variant="outlined" onClick={() => setTemplatesOpen(true)}>
                OnPack 到期日 ZIP
              </Button>
            )}
            <Box
              sx={{
                px: 1.5,
                py: 0.75,
                borderRadius: 1,
                backgroundColor: printerConnected ? BG_STATUS_OK : BG_STATUS_ERROR,
                color: printerConnected ? FG_STATUS_OK : FG_STATUS_ERROR,
                fontWeight: 600,
                whiteSpace: "nowrap",
              }}
              title={printerMessage}
            >
              列印機：
            </Box>
            <FormControl size="small" sx={{ minWidth: 180 }}>
              <InputLabel>列印機</InputLabel>
              <Select value={printer} label="列印機" onChange={handlePrinterChange}>
                {PRINTER_OPTIONS.map((opt) => (
                  <MenuItem key={opt.value} value={opt.value}>
                    {opt.label}
                  </MenuItem>
                ))}
              </Select>
            </FormControl>
          </Stack>
        </Stack>
        <Typography variant="body2" sx={{ mt: 1, color: "text.secondary" }}>
          {printerMessage}
        </Typography>
        <Stack direction="row" sx={{ mt: 2 }} spacing={2} flexWrap="wrap" useFlexGap>
          <Button
            variant="contained"
            startIcon={<Download />}
            onClick={handleDownloadOnPackQr}
            disabled={
              loading ||
              downloadingOnPack ||
              downloadingOnPackExp ||
              downloadingOnPackText ||
              downloadingOnPackTextExp ||
              jobOrders.length === 0
            }
          >
            {downloadingOnPack ? "下載中..." : "下載 OnPack 汁水機 QR code"}
          </Button>
          <Button
            variant="contained"
            startIcon={<Download />}
            onClick={handleDownloadOnPackQrWithExpiry}
            disabled={
              loading ||
              downloadingOnPack ||
              downloadingOnPackExp ||
              downloadingOnPackText ||
              downloadingOnPackTextExp ||
              jobOrders.length === 0
            }
          >
            {downloadingOnPackExp ? "下載中..." : "下載 OnPack 汁水機（含到期日）"}
          </Button>
          <Button
            variant="contained"
            color="secondary"
            startIcon={<Download />}
            onClick={handleDownloadOnPackTextQr}
            disabled={
              loading ||
              downloadingOnPack ||
              downloadingOnPackExp ||
              downloadingOnPackText ||
              downloadingOnPackTextExp ||
              jobOrders.length === 0
            }
          >
            {downloadingOnPackText ? "下載中..." : "下載 OnPack2023檸檬機"}
          </Button>
          {canSeeOnPackAdmin && (
            <Button
              variant="contained"
              color="secondary"
              startIcon={<Download />}
              onClick={handleDownloadOnPackTextQrWithExpiry}
              disabled={
                loading ||
                downloadingOnPack ||
                downloadingOnPackExp ||
                downloadingOnPackText ||
                downloadingOnPackTextExp ||
                jobOrders.length === 0
              }
            >
              {downloadingOnPackTextExp ? "下載中..." : "下載 OnPack2023檸檬機（含到期日）"}
            </Button>
          )}
        </Stack>
      </Paper>

      {/* Job orders list */}
      <Paper sx={{ flex: 1, overflow: "hidden", display: "flex", flexDirection: "column", backgroundColor: BG_LIST }}>
        {loading ? (
          <Box sx={{ display: "flex", justifyContent: "center", alignItems: "center", py: 8 }}>
            <CircularProgress />
          </Box>
        ) : jobOrders.length === 0 ? (
          <Box sx={{ py: 8, textAlign: "center" }}>
            <Typography color="text.secondary">當日無工單</Typography>
          </Box>
        ) : (
          <Box sx={{ overflow: "auto", flex: 1, p: 2 }}>
            <Stack spacing={1}>
              {jobOrders.map((jo) => {
                const batch = getBatch(jo);
                const qtyStr = formatQty(jo.reqQty);
                const isSelected = selectedId === jo.id;
                const codeKey = (jo.itemCode || "").trim().toUpperCase();
                const juiceExpiryOk = juiceExpiryCodeSet.has(codeKey);
                const lemonOk = lemonCodeSet.has(codeKey);
                return (
                  <Paper
                    key={jo.id}
                    elevation={1}
                    sx={{
                      p: 2,
                      display: "flex",
                      alignItems: "flex-start",
                      gap: 2,
                      cursor: "pointer",
                      backgroundColor: isSelected ? BG_ROW_SELECTED : BG_ROW,
                      "&:hover": { backgroundColor: isSelected ? BG_ROW_SELECTED : "#b8d4eb" },
                      transition: "background-color 0.2s",
                    }}
                    onClick={() => handleRowClick(jo)}
                  >
                    <Box sx={{ minWidth: 120, flexShrink: 0 }}>
                      <Typography variant="h6" sx={{ fontSize: "1.1rem" }}>
                        {batch}
                      </Typography>
                      {qtyStr !== "—" && (
                        <Typography variant="body2" color="text.secondary">
                          數量：{qtyStr}
                        </Typography>
                      )}
                    </Box>
                    <Box sx={{ minWidth: 140, flexShrink: 0 }}>
                      <Typography variant="h6" sx={{ fontSize: "1.1rem" }}>
                        {jo.code || "—"}
                      </Typography>
                    </Box>
                    <Box sx={{ minWidth: 140, flexShrink: 0 }}>
                      <Typography variant="h6" sx={{ fontSize: "1.35rem" }}>
                        {jo.itemCode || "—"}
                      </Typography>
                      <Stack direction="row" spacing={0.5} flexWrap="wrap" useFlexGap sx={{ mt: 0.5 }}>
                        {juiceExpiryOk ? <Chip size="small" label="汁水機" color="primary" /> : null}
                        {lemonOk ? <Chip size="small" label="檸檬機" color="secondary" /> : null}
                      </Stack>
                    </Box>
                    <Box sx={{ flex: 1, minWidth: 0 }}>
                      <Typography variant="h6" sx={{ fontSize: "1.35rem", wordBreak: "break-word" }}>
                        {jo.itemName || "—"}
                      </Typography>
                    </Box>
                    <Button
                      size="small"
                      variant="contained"
                      startIcon={<Print />}
                      onClick={(e) => {
                        e.stopPropagation();
                        handleRowClick(jo);
                      }}
                    >
                      列印
                    </Button>
                  </Paper>
                );
              })}
            </Stack>
          </Box>
        )}
      </Paper>

      {/* Print count dialog (DataFlex) */}
      <Dialog open={printDialogOpen} onClose={() => (printing ? null : setPrintDialogOpen(false))} maxWidth="xs" fullWidth>
        <DialogTitle>打袋機 DataFlex 列印數量</DialogTitle>
        <DialogContent>
          <Stack spacing={2} sx={{ mt: 1 }}>
            <Typography variant="body1" sx={{ fontWeight: 700 }}>
              列印多少個袋？
            </Typography>
            <Typography variant="body2" color="text.secondary">
              {printContinuous ? "連續 (C)" : `數量： ${printCount}`}
            </Typography>
            <Stack direction="row" spacing={1} justifyContent="center" flexWrap="wrap">
              <Button
                size="small"
                variant="contained"
                onClick={() => {
                  setPrintContinuous(false);
                  setPrintCount((c) => c + 50);
                }}
                disabled={printing}
              >
                +50
              </Button>
              <Button
                size="small"
                variant="contained"
                onClick={() => {
                  setPrintContinuous(false);
                  setPrintCount((c) => c + 10);
                }}
                disabled={printing}
              >
                +10
              </Button>
              <Button
                size="small"
                variant="contained"
                onClick={() => {
                  setPrintContinuous(false);
                  setPrintCount((c) => c + 5);
                }}
                disabled={printing}
              >
                +5
              </Button>
              <Button
                size="small"
                variant="contained"
                onClick={() => {
                  setPrintContinuous(false);
                  setPrintCount((c) => c + 1);
                }}
                disabled={printing}
              >
                +1
              </Button>
              <Button
                size="small"
                variant={printContinuous ? "contained" : "outlined"}
                onClick={() => {
                  setPrintContinuous(true);
                }}
                disabled={printing}
              >
                連續 (C)
              </Button>
            </Stack>
          </Stack>
        </DialogContent>
        <DialogActions>
          <Button onClick={() => setPrintDialogOpen(false)} disabled={printing}>
            取消
          </Button>
          <Button variant="contained" onClick={() => void confirmPrintDataFlex()} disabled={printing}>
            {printing ? <CircularProgress size={16} /> : "確認送出"}
          </Button>
        </DialogActions>
      </Dialog>

      {/* Settings dialog */}
      <Dialog open={settingsOpen} onClose={() => setSettingsOpen(false)} maxWidth="sm" fullWidth>
        <DialogTitle>設定</DialogTitle>
        <DialogContent>
          <Stack spacing={2} sx={{ mt: 1 }}>
            <Typography variant="subtitle2" color="primary">
              打袋機 DataFlex
            </Typography>
            <TextField
              label="IP"
              size="small"
              value={settings.dabag_ip}
              onChange={(e) => setSettings((s) => ({ ...s, dabag_ip: e.target.value }))}
              fullWidth
            />
            <TextField
              label="Port"
              size="small"
              value={settings.dabag_port}
              onChange={(e) => setSettings((s) => ({ ...s, dabag_port: e.target.value }))}
              fullWidth
            />
            <Typography variant="subtitle2" color="primary">
              激光機
            </Typography>
            <TextField
              label="IP"
              size="small"
              value={settings.laser_ip}
              onChange={(e) => setSettings((s) => ({ ...s, laser_ip: e.target.value }))}
              fullWidth
            />
            <TextField
              label="Port"
              size="small"
              value={settings.laser_port}
              onChange={(e) => setSettings((s) => ({ ...s, laser_port: e.target.value }))}
              fullWidth
            />
          </Stack>
        </DialogContent>
        <DialogActions>
          <Button onClick={() => setSettingsOpen(false)}>取消</Button>
          <Button
            variant="contained"
            onClick={() => {
              saveSettings(settings);
              setSnackbar({ open: true, message: "設定已儲存", severity: "success" });
              setSettingsOpen(false);
              checkCurrentPrinter();
            }}
          >
            儲存
          </Button>
        </DialogActions>
      </Dialog>

      <Dialog
        open={templatesOpen && canSeeOnPackAdmin}
        onClose={() => setTemplatesOpen(false)}
        maxWidth="xl"
        fullWidth
        scroll="paper"
        PaperProps={{ sx: { height: "90vh", maxHeight: "90vh" } }}
      >
        <DialogTitle>OnPack 到期日 ZIP 品號</DialogTitle>
        <DialogContent
          sx={{
            display: "flex",
            flexDirection: "column",
            overflow: "hidden",
            pt: 1,
          }}
        >
          <Stack spacing={1.5} sx={{ flexShrink: 0, mb: 1 }}>
            <Typography variant="subtitle2" color="primary">
              汁水機（{expiryCodes.length}）
            </Typography>
            <Typography variant="body2" color="text.secondary">
              「下載 OnPack 汁水機（含到期日）」只用此清單。名稱印在 Product 行，過長可改短後按儲存。
              點欄位標題可排序；冷藏／-18／列印第一次點擊會把「未設」排到最前。
            </Typography>
            <Stack direction="row" spacing={1} alignItems="center">
              <TextField
                label="新增品號"
                size="small"
                placeholder="例如 PP2211"
                value={expiryCodeInput}
                onChange={(e) => setExpiryCodeInput(e.target.value)}
                onKeyDown={(e) => {
                  if (e.key === "Enter") {
                    e.preventDefault();
                    void handleAddExpiryCode();
                  }
                }}
                sx={{ minWidth: 180 }}
              />
              <Button variant="contained" onClick={() => void handleAddExpiryCode()}>
                加入
              </Button>
            </Stack>
          </Stack>
          {expiryCodesLoading ? (
            <Box sx={{ display: "flex", justifyContent: "center", py: 1 }}>
              <CircularProgress size={20} />
            </Box>
          ) : expiryCodes.length === 0 ? (
            <Typography color="text.secondary">清單空白</Typography>
          ) : (
            <TableContainer sx={{ flex: 1, minHeight: 0, overflow: "auto" }}>
              <Table size="small" stickyHeader>
                <TableHead>
                  <TableRow>
                    <TableCell sx={{ fontWeight: 700, whiteSpace: "nowrap" }}>
                      <TableSortLabel
                        active={expirySortKey === "itemCode"}
                        direction={expirySortKey === "itemCode" ? expirySortDir : "asc"}
                        onClick={() => onExpirySort("itemCode")}
                      >
                        品號
                      </TableSortLabel>
                    </TableCell>
                    <TableCell sx={{ fontWeight: 700 }}>
                      <TableSortLabel
                        active={expirySortKey === "name"}
                        direction={expirySortKey === "name" ? expirySortDir : "asc"}
                        onClick={() => onExpirySort("name")}
                      >
                        中文名稱＋單位
                      </TableSortLabel>
                    </TableCell>
                    <TableCell align="center" sx={{ fontWeight: 700, whiteSpace: "nowrap" }}>
                      <TableSortLabel
                        active={expirySortKey === "defaultDays"}
                        direction={expirySortKey === "defaultDays" ? expirySortDir : "asc"}
                        onClick={() => onExpirySort("defaultDays")}
                      >
                        冷藏
                      </TableSortLabel>
                      <Typography variant="caption" display="block" color="text.secondary">
                        天
                      </Typography>
                    </TableCell>
                    <TableCell align="center" sx={{ fontWeight: 700, whiteSpace: "nowrap" }}>
                      <TableSortLabel
                        active={expirySortKey === "minus18Days"}
                        direction={expirySortKey === "minus18Days" ? expirySortDir : "asc"}
                        onClick={() => onExpirySort("minus18Days")}
                      >
                        -18
                      </TableSortLabel>
                      <Typography variant="caption" display="block" color="text.secondary">
                        天
                      </Typography>
                    </TableCell>
                    <TableCell align="center" sx={{ fontWeight: 700, whiteSpace: "nowrap" }}>
                      <TableSortLabel
                        active={expirySortKey === "useMinus18"}
                        direction={expirySortKey === "useMinus18" ? expirySortDir : "asc"}
                        onClick={() => onExpirySort("useMinus18")}
                      >
                        用 -18
                      </TableSortLabel>
                    </TableCell>
                    <TableCell align="center" sx={{ fontWeight: 700, whiteSpace: "nowrap" }}>
                      <TableSortLabel
                        active={expirySortKey === "effectiveDays"}
                        direction={expirySortKey === "effectiveDays" ? expirySortDir : "asc"}
                        onClick={() => onExpirySort("effectiveDays")}
                      >
                        列印
                      </TableSortLabel>
                      <Typography variant="caption" display="block" color="text.secondary">
                        天
                      </Typography>
                    </TableCell>
                    <TableCell align="right" sx={{ fontWeight: 700 }}>
                      操作
                    </TableCell>
                  </TableRow>
                </TableHead>
                <TableBody>
                  {sortedExpiryCodes.map((row) => {
                      const draft = nameDrafts[row.itemCode] ?? "";
                      const savedName = row.printName || row.defaultPrintName || "";
                      const nameDirty = draft.trim() !== savedName.trim();
                      const hasShelf = row.defaultDays != null || row.minus18Days != null;
                      const canUseMinus18 = row.minus18Days != null && row.minus18Days > 0;
                      const missingHint = hasShelf
                        ? canUseMinus18
                          ? ""
                          : "此品號沒有 -18 天數"
                        : "未設定保質期，請到設定 → 物品預設保質期新增";
                      return (
                        <TableRow key={row.itemCode} hover>
                          <TableCell sx={{ fontFamily: "monospace", fontWeight: 700, whiteSpace: "nowrap" }}>
                            {row.itemCode}
                          </TableCell>
                          <TableCell sx={{ minWidth: 280 }}>
                            <Stack direction="row" spacing={1} alignItems="center">
                              <TextField
                                size="small"
                                value={draft}
                                onChange={(e) =>
                                  setNameDrafts((prev) => ({ ...prev, [row.itemCode]: e.target.value }))
                                }
                                placeholder={row.defaultPrintName || "例如 豬肉水(1包X2千克)"}
                                inputProps={{ maxLength: 255 }}
                                fullWidth
                              />
                              <Button
                                variant="contained"
                                size="small"
                                disabled={!nameDirty}
                                onClick={() => void handleSaveExpiryPrintName(row.itemCode)}
                              >
                                儲存
                              </Button>
                            </Stack>
                          </TableCell>
                          <TableCell align="center">
                            <Typography
                              variant="h6"
                              sx={{ fontWeight: 700, lineHeight: 1.2 }}
                              color={row.defaultDays == null ? "warning.main" : "text.primary"}
                            >
                              {daysLabel(row.defaultDays)}
                            </Typography>
                          </TableCell>
                          <TableCell align="center">
                            <Typography
                              variant="h6"
                              sx={{ fontWeight: 700, lineHeight: 1.2 }}
                              color={row.minus18Days == null ? "warning.main" : "text.primary"}
                            >
                              {daysLabel(row.minus18Days)}
                            </Typography>
                          </TableCell>
                          <TableCell align="center">
                            <Tooltip title={canUseMinus18 ? "改用 -18 天數列印到期日" : missingHint}>
                              <span>
                                <Switch
                                  size="small"
                                  checked={row.useMinus18 === true}
                                  disabled={!canUseMinus18}
                                  onChange={(e) => void handleToggleUseMinus18(row.itemCode, e.target.checked)}
                                  inputProps={{ "aria-label": `${row.itemCode} 用 -18` }}
                                />
                              </span>
                            </Tooltip>
                          </TableCell>
                          <TableCell align="center">
                            <Typography
                              variant="h6"
                              sx={{ fontWeight: 800, lineHeight: 1.2 }}
                              color={row.effectiveDays == null ? "warning.main" : "primary.main"}
                            >
                              {daysLabel(row.effectiveDays)}
                            </Typography>
                            {!hasShelf && (
                              <Typography variant="caption" color="warning.main" display="block">
                                未設定
                              </Typography>
                            )}
                          </TableCell>
                          <TableCell align="right">
                            <Button
                              size="small"
                              color="error"
                              onClick={() => void handleDeleteExpiryCode(row.itemCode)}
                            >
                              移除
                            </Button>
                          </TableCell>
                        </TableRow>
                      );
                    })}
                  </TableBody>
                </Table>
              </TableContainer>
            )}
          <Typography variant="body2" color="text.secondary" sx={{ flexShrink: 0, mt: 1 }}>
            檸檬機到期日 ZIP 品號稍後加入。
          </Typography>
        </DialogContent>
        <DialogActions>
          <Button onClick={() => setTemplatesOpen(false)}>關閉</Button>
        </DialogActions>
      </Dialog>

      <Snackbar
        open={snackbar.open}
        autoHideDuration={snackbar.duration ?? 3000}
        onClose={() => setSnackbar((s) => ({ ...s, open: false }))}
        anchorOrigin={{ vertical: "bottom", horizontal: "center" }}
      >
        <Alert
          onClose={() => setSnackbar((s) => ({ ...s, open: false }))}
          severity={snackbar.severity ?? "info"}
          variant="filled"
          sx={{ width: "100%", maxWidth: 720 }}
        >
          {snackbar.message}
        </Alert>
      </Snackbar>
    </Box>
  );
};

export default BagPrintSearch;