"use client";

import React, { useCallback, useEffect, useRef, useState } from "react";
import {
  Alert,
  Box,
  Button,
  Checkbox,
  Chip,
  CircularProgress,
  FormControlLabel,
  Paper,
  Stack,
  Tab,
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableRow,
  Tabs,
  TextField,
  Typography,
} from "@mui/material";
import { DateCalendar } from "@mui/x-date-pickers/DateCalendar";
import { LocalizationProvider } from "@mui/x-date-pickers/LocalizationProvider";
import { AdapterDayjs } from "@mui/x-date-pickers/AdapterDayjs";
import { useTranslation } from "react-i18next";
import dayjs, { type Dayjs } from "dayjs";
import "dayjs/locale/zh-hk";
import "dayjs/locale/en";
import {
  fetchStockLedgerFixAdjPreview,
  runStockLedgerFixAdj,
  fetchStockLedgerFixDay,
  fetchStockLedgerFixInventory,
  fetchStockLedgerFixInventoryScope,
  fetchStockLedgerFixLotScope,
  runStockLedgerFixDay,
  runStockLedgerFixRange,
  runStockLedgerFixInventory,
  runStockLedgerFixInventoryScope,
  runStockLedgerFixLotScope,
  searchStockLedgerFixInventory,
  searchStockLedgerFixLot,
  downloadStockLedgerFixSql,
  type StockLedgerFixAdjPreview,
  type StockLedgerFixCheckPart,
  type StockLedgerFixDayDetail,
  type StockLedgerFixInventoryPreview,
  type StockLedgerFixScopeDetail,
  type StockLedgerFixSearchInventoryHit,
  type StockLedgerFixSearchLotHit,
} from "@/app/api/stockLedgerFix/client";

const FIRST_LEDGER_DAY = dayjs("2026-03-01");

const DAY_FIX_STEPS = ["2.1", "2.2", "2.3", "2.4", "2.5", "2.6"] as const;
type DayFixStep = (typeof DAY_FIX_STEPS)[number];
const ALL_DAY_STEPS: Record<DayFixStep, boolean> = {
  "2.1": true,
  "2.2": true,
  "2.3": true,
  "2.4": true,
  "2.5": true,
  "2.6": true,
};
const DAY_STEP_I18N: Record<DayFixStep, string> = {
  "2.1": "step21",
  "2.2": "step22",
  "2.3": "step23",
  "2.4": "step24",
  "2.5": "step25",
  "2.6": "step26",
};

/** Export SQL parts (aligned with fix steps + 1.0 / 2.7). */
const EXPORT_PARTS = ["1.0", "2.3", "ledger", "2.6", "2.7"] as const;
type ExportPart = (typeof EXPORT_PARTS)[number];
const DEFAULT_EXPORT_PARTS: Record<ExportPart, boolean> = {
  "1.0": false,
  "2.3": false,
  ledger: true,
  "2.6": true,
  "2.7": false,
};
const FULL_EXPORT_PARTS: Record<ExportPart, boolean> = {
  "1.0": true,
  "2.3": true,
  ledger: true,
  "2.6": true,
  "2.7": true,
};
const EXPORT_PART_I18N: Record<ExportPart, string> = {
  "1.0": "export10",
  "2.3": "export23",
  ledger: "exportLedger",
  "2.6": "export26",
  "2.7": "export27",
};

function selectedExportParts(flags: Record<ExportPart, boolean>): ExportPart[] {
  return EXPORT_PARTS.filter((p) => flags[p]);
}

function exportPartsPayload(flags: Record<ExportPart, boolean>): string[] | undefined {
  const selected = selectedExportParts(flags);
  if (selected.length === 0) return undefined;
  // Always send explicit list so backend does not fall back to legacy default alone
  return selected;
}

function selectedDaySteps(flags: Record<DayFixStep, boolean>): DayFixStep[] {
  return DAY_FIX_STEPS.filter((s) => flags[s]);
}

function stepsPayload(flags: Record<DayFixStep, boolean>): string[] | undefined {
  const selected = selectedDaySteps(flags);
  if (selected.length === 0 || selected.length === DAY_FIX_STEPS.length) return undefined;
  return selected;
}

function apiErrorMessage(e: unknown, fallback: string): string {
  if (e && typeof e === "object" && "response" in e) {
    const data = (e as { response?: { data?: unknown } }).response?.data;
    if (typeof data === "string" && data.trim()) {
      return data.trim().slice(0, 400);
    }
    if (data && typeof data === "object") {
      const msg = (data as { message?: unknown }).message;
      if (typeof msg === "string" && msg.trim()) {
        return msg.trim().slice(0, 400);
      }
    }
  }
  if (e instanceof Error && e.message) return e.message;
  return fallback;
}

function partVerdict(
  part: StockLedgerFixCheckPart,
): "correct" | "miss" | "incorrect" | "over-issue" | "can-fix" | "cannot-fix" {
  if (part.group === "canFix") {
    return part.miss > 0 || part.incorrect > 0 ? "can-fix" : "correct";
  }
  if (part.group === "cannotFix") {
    return part.miss > 0 || part.incorrect > 0 ? "cannot-fix" : "correct";
  }
  if (part.key === "overIssue") {
    if (part.incorrect > 0 || part.miss > 0) return "over-issue";
    return "correct";
  }
  if (part.incorrect > 0) return "incorrect";
  if (part.miss > 0) return "miss";
  if (part.key === "dayTable" && part.ok === 0) return "miss";
  return "correct";
}

const VERDICT_LABEL: Record<
  ReturnType<typeof partVerdict>,
  "verdictCorrect" | "verdictMiss" | "verdictOverIssue" | "verdictCanFix" | "verdictCannotFix" | "verdictIncorrect"
> = {
  correct: "verdictCorrect",
  miss: "verdictMiss",
  "over-issue": "verdictOverIssue",
  "can-fix": "verdictCanFix",
  "cannot-fix": "verdictCannotFix",
  incorrect: "verdictIncorrect",
};

function CheckPartsTable({ parts }: { parts: StockLedgerFixCheckPart[] }) {
  const { t } = useTranslation("stockLedgerFix");
  const field = parts.filter((p) => !p.group || p.group === "field");
  const canFix = parts.filter(
    (p) => p.group === "canFix" && p.miss + p.incorrect > 0,
  );
  const cannotFix = parts.filter(
    (p) => p.group === "cannotFix" && p.miss + p.incorrect > 0,
  );
  const renderRows = (rows: StockLedgerFixCheckPart[]) =>
    rows.map((p) => {
      const v = partVerdict(p);
      return (
        <TableRow key={p.key}>
          <TableCell sx={{ whiteSpace: "normal", wordBreak: "break-word" }}>
            {t(`part.${p.key}`, { defaultValue: p.label })}
          </TableCell>
          <TableCell>
            <Chip
              size="small"
              label={t(VERDICT_LABEL[v])}
              color={
                v === "correct"
                  ? "success"
                  : v === "miss" || v === "over-issue" || v === "can-fix"
                    ? "warning"
                    : "error"
              }
            />
          </TableCell>
          <TableCell align="right">{p.ok}</TableCell>
          <TableCell align="right">{p.miss}</TableCell>
          <TableCell align="right">{p.incorrect}</TableCell>
        </TableRow>
      );
    });
  return (
    <Stack spacing={2}>
      <Table size="small" sx={{ width: "100%" }}>
        <TableHead>
          <TableRow>
            <TableCell sx={{ whiteSpace: "normal" }}>{t("checkItem")}</TableCell>
            <TableCell>{t("checkStatus")}</TableCell>
            <TableCell align="right">{t("checkCorrect")}</TableCell>
            <TableCell align="right">{t("checkMiss")}</TableCell>
            <TableCell align="right">{t("checkIncorrect")}</TableCell>
          </TableRow>
        </TableHead>
        <TableBody>{renderRows(field)}</TableBody>
      </Table>
      {canFix.length > 0 && (
        <>
          <Typography variant="subtitle2" sx={{ whiteSpace: "normal" }}>
            {t("canAutoFix")}
          </Typography>
          <Table size="small">
            <TableHead>
              <TableRow>
                <TableCell>{t("checkReason")}</TableCell>
                <TableCell>{t("checkStatus")}</TableCell>
                <TableCell align="right">{t("checkCorrect")}</TableCell>
                <TableCell align="right">{t("checkRows")}</TableCell>
                <TableCell align="right">{t("checkDash")}</TableCell>
              </TableRow>
            </TableHead>
            <TableBody>{renderRows(canFix)}</TableBody>
          </Table>
        </>
      )}
      {cannotFix.length > 0 && (
        <>
          <Typography variant="subtitle2" sx={{ whiteSpace: "normal" }}>
            {t("cannotAutoFix")}
          </Typography>
          <Table size="small">
            <TableHead>
              <TableRow>
                <TableCell>{t("checkReason")}</TableCell>
                <TableCell>{t("checkStatus")}</TableCell>
                <TableCell align="right">{t("checkCorrect")}</TableCell>
                <TableCell align="right">{t("checkDash")}</TableCell>
                <TableCell align="right">{t("checkRows")}</TableCell>
              </TableRow>
            </TableHead>
            <TableBody>{renderRows(cannotFix)}</TableBody>
          </Table>
        </>
      )}
    </Stack>
  );
}

const StockLedgerFixPageClient: React.FC = () => {
  const { t, i18n } = useTranslation("stockLedgerFix");
  const isZh = (i18n.language || "zh").startsWith("zh");
  const listSep = isZh ? "、" : ", ";
  const [tab, setTab] = useState<"day" | "inventory" | "lot">("day");
  const [selected, setSelected] = useState<Dayjs | null>(() =>
    dayjs().subtract(1, "day"),
  );
  const [detail, setDetail] = useState<StockLedgerFixDayDetail | null>(null);
  const [detailLoading, setDetailLoading] = useState(false);
  const [detailError, setDetailError] = useState<string | null>(null);
  const [fixing, setFixing] = useState(false);
  const [fixError, setFixError] = useState<string | null>(null);
  const [fixMessage, setFixMessage] = useState<string | null>(null);
  const detailInFlight = useRef(false);
  const fixInFlight = useRef(false);
  const inventoryLoadInFlight = useRef(false);
  const inventoryRunInFlight = useRef(false);
  const searchInFlight = useRef(false);
  const scopeInFlight = useRef(false);
  const exportInFlight = useRef(false);
  const [chainFrom, setChainFrom] = useState("2026-03-15");
  const [chainTo, setChainTo] = useState(() =>
    dayjs().subtract(1, "day").format("YYYY-MM-DD"),
  );
  const [chainRunning, setChainRunning] = useState(false);
  const [chainProgress, setChainProgress] = useState<string | null>(null);
  const [daySteps, setDaySteps] = useState<Record<DayFixStep, boolean>>(ALL_DAY_STEPS);
  const [exportFrom, setExportFrom] = useState("2026-03-15");
  const [exportTo, setExportTo] = useState(() =>
    dayjs().subtract(1, "day").format("YYYY-MM-DD"),
  );
  const [exportParts, setExportParts] =
    useState<Record<ExportPart, boolean>>(DEFAULT_EXPORT_PARTS);
  const [exporting, setExporting] = useState(false);
  const [exportError, setExportError] = useState<string | null>(null);
  const [inventoryPreview, setInventoryPreview] =
    useState<StockLedgerFixInventoryPreview | null>(null);
  const [inventoryLoading, setInventoryLoading] = useState(false);
  const [inventoryRunning, setInventoryRunning] = useState(false);
  const [inventoryError, setInventoryError] = useState<string | null>(null);
  const [inventoryMessage, setInventoryMessage] = useState<string | null>(null);
  const adjLoadInFlight = useRef(false);
  const adjRunInFlight = useRef(false);
  const [adjPreview, setAdjPreview] = useState<StockLedgerFixAdjPreview | null>(null);
  const [adjLoading, setAdjLoading] = useState(false);
  const [adjRunning, setAdjRunning] = useState(false);
  const [adjError, setAdjError] = useState<string | null>(null);
  const [adjMessage, setAdjMessage] = useState<string | null>(null);
  /** Default yesterday; freeze-night dump set to today so ADJ lands on dump day. */
  const [adjDate, setAdjDate] = useState(() =>
    dayjs().subtract(1, "day").format("YYYY-MM-DD"),
  );
  const [invQuery, setInvQuery] = useState("");
  const [lotQuery, setLotQuery] = useState("");
  const [invHits, setInvHits] = useState<StockLedgerFixSearchInventoryHit[]>([]);
  const [lotHits, setLotHits] = useState<StockLedgerFixSearchLotHit[]>([]);
  const [searchError, setSearchError] = useState<string | null>(null);
  const [searching, setSearching] = useState(false);
  const [scope, setScope] = useState<StockLedgerFixScopeDetail | null>(null);
  const [scopeLoading, setScopeLoading] = useState(false);

  const loadInventory = useCallback(async () => {
    if (inventoryLoadInFlight.current) return;
    inventoryLoadInFlight.current = true;
    setInventoryLoading(true);
    setInventoryError(null);
    try {
      const data = await fetchStockLedgerFixInventory();
      setInventoryPreview(data);
    } catch (e) {
      console.error(e);
      setInventoryError(t("inventory10LoadError"));
      setInventoryPreview(null);
    } finally {
      setInventoryLoading(false);
      inventoryLoadInFlight.current = false;
    }
  }, [t]);

  const loadDay = useCallback(async (date: string) => {
    if (detailInFlight.current) return;
    detailInFlight.current = true;
    setDetailLoading(true);
    setDetailError(null);
    setFixMessage(null);
    try {
      const data = await fetchStockLedgerFixDay(date);
      setDetail(data);
    } catch (e) {
      console.error(e);
      setDetailError(t("dayLoadError"));
      setDetail(null);
    } finally {
      setDetailLoading(false);
      detailInFlight.current = false;
    }
  }, [t]);

  const loadAdjPreview = useCallback(async () => {
    if (adjLoadInFlight.current) return;
    const d = adjDate.trim();
    if (!d) {
      setAdjError(t("adjDateRequired"));
      return;
    }
    if (d > dayjs().format("YYYY-MM-DD")) {
      setAdjError(t("adjDateFuture"));
      return;
    }
    adjLoadInFlight.current = true;
    setAdjLoading(true);
    setAdjError(null);
    try {
      setAdjPreview(await fetchStockLedgerFixAdjPreview(d));
    } catch (e) {
      console.error(e);
      setAdjError(apiErrorMessage(e, t("adjLoadError")));
      setAdjPreview(null);
    } finally {
      setAdjLoading(false);
      adjLoadInFlight.current = false;
    }
  }, [adjDate, t]);

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

  useEffect(() => {
    if (tab === "day" && selected) {
      void loadDay(selected.format("YYYY-MM-DD"));
    }
  }, [selected, loadDay, tab]);

  const onFixDay = async () => {
    if (!selected || fixInFlight.current) return;
    const date = selected.format("YYYY-MM-DD");
    if (selected.isAfter(dayjs(), "day")) {
      setFixError(t("cannotFixFuture"));
      return;
    }
    const picked = selectedDaySteps(daySteps);
    if (picked.length === 0) {
      setFixError(t("pickAtLeastOneStep"));
      return;
    }
    const steps = stepsPayload(daySteps);
    const stepLabel = steps?.join(listSep) ?? t("allSteps216");
    if (steps) {
      const ok = window.confirm(
        t("confirmPartialSteps", { steps: stepLabel, date }),
      );
      if (!ok) return;
    }
    fixInFlight.current = true;
    setFixing(true);
    setFixError(null);
    setFixMessage(null);
    try {
      const res = await runStockLedgerFixDay(date, steps);
      setFixMessage(
        t("fixDayDone", {
          date: res.date,
          steps: stepLabel,
          lot: res.filledLotLineId,
          uom: res.filledUomId,
          inventory: res.filledInventoryId,
          lotQty: res.filledLotQty,
          balance: res.filledBalance,
          dayRows: res.dayRowsWritten,
        }),
      );
      await loadDay(date);
    } catch (e) {
      console.error(e);
      setFixError(apiErrorMessage(e, t("fixFailed")));
    } finally {
      setFixing(false);
      fixInFlight.current = false;
    }
  };

  const onInventory = async () => {
    if (inventoryRunInFlight.current) return;
    const ok = window.confirm(t("inventory10Confirm"));
    if (!ok) return;
    inventoryRunInFlight.current = true;
    setInventoryRunning(true);
    setInventoryError(null);
    setInventoryMessage(null);
    try {
      const res = await runStockLedgerFixInventory();
      setInventoryMessage(
        t("inventory10Done", {
          patched: res.patchedStockUomId,
          inserted: res.inserted,
          orphans: res.orphansDeleted ?? 0,
          updated: res.updated,
          missingAfter: res.missingUomPairsAfter,
          nullAfter: res.nullStockUomIdAfter,
        }),
      );
      await loadInventory();
    } catch (e) {
      console.error(e);
      setInventoryError(apiErrorMessage(e, t("inventory10Fail")));
    } finally {
      setInventoryRunning(false);
      inventoryRunInFlight.current = false;
    }
  };

  const onAdjApply = async () => {
    if (adjRunInFlight.current) return;
    const d = adjDate.trim() || adjPreview?.adjDate;
    if (!d) {
      setAdjError(t("adjDateAndPreviewRequired"));
      return;
    }
    const ok = window.confirm(
      t("adjConfirm", {
        date: d,
        overIssueCount: adjPreview?.overIssueCount ?? 0,
        sumOverIssue: adjPreview?.sumOverIssue ?? "?",
        adjInCount: adjPreview?.adjInCount ?? 0,
        adjOutCount: adjPreview?.adjOutCount ?? 0,
        sumMissIn: adjPreview?.sumMissIn ?? "?",
        sumMissOut: adjPreview?.sumMissOut ?? "?",
      }),
    );
    if (!ok) return;
    adjRunInFlight.current = true;
    setAdjRunning(true);
    setAdjError(null);
    setAdjMessage(null);
    try {
      const res = await runStockLedgerFixAdj(d);
      setAdjMessage(
        t("adjDone", {
          date: res.adjDate,
          overIssuePatched: res.overIssuePatched,
          insertedIn: res.insertedIn,
          insertedOut: res.insertedOut,
          filledLotQty: res.filledLotQty,
          filledBalance: res.filledBalance,
          dayRowsWritten: res.dayRowsWritten,
        }),
      );
      await loadAdjPreview();
    } catch (e) {
      console.error(e);
      setAdjError(apiErrorMessage(e, t("adjFail")));
    } finally {
      setAdjRunning(false);
      adjRunInFlight.current = false;
    }
  };

  const onSearchInventory = async () => {
    if (searchInFlight.current || !invQuery.trim()) return;
    searchInFlight.current = true;
    setSearching(true);
    setSearchError(null);
    try {
      const hits = await searchStockLedgerFixInventory(invQuery.trim());
      setInvHits(hits);
      setScope(null);
    } catch (e) {
      console.error(e);
      setSearchError(apiErrorMessage(e, t("searchFailed")));
    } finally {
      setSearching(false);
      searchInFlight.current = false;
    }
  };

  const onSearchLot = async () => {
    if (searchInFlight.current || !lotQuery.trim()) return;
    searchInFlight.current = true;
    setSearching(true);
    setSearchError(null);
    try {
      const hits = await searchStockLedgerFixLot(lotQuery.trim());
      setLotHits(hits);
      setScope(null);
    } catch (e) {
      console.error(e);
      setSearchError(apiErrorMessage(e, t("searchFailed")));
    } finally {
      setSearching(false);
      searchInFlight.current = false;
    }
  };

  const loadInventoryScope = async (id: number) => {
    if (scopeInFlight.current) return;
    scopeInFlight.current = true;
    setScopeLoading(true);
    setFixError(null);
    setFixMessage(null);
    try {
      setScope(await fetchStockLedgerFixInventoryScope(id));
    } catch (e) {
      console.error(e);
      setFixError(apiErrorMessage(e, t("invLoadError")));
      setScope(null);
    } finally {
      setScopeLoading(false);
      scopeInFlight.current = false;
    }
  };

  const loadLotScope = async (id: number) => {
    if (scopeInFlight.current) return;
    scopeInFlight.current = true;
    setScopeLoading(true);
    setFixError(null);
    setFixMessage(null);
    try {
      setScope(await fetchStockLedgerFixLotScope(id));
    } catch (e) {
      console.error(e);
      setFixError(apiErrorMessage(e, t("lotLoadError")));
      setScope(null);
    } finally {
      setScopeLoading(false);
      scopeInFlight.current = false;
    }
  };

  const onFixInventoryScope = async () => {
    if (!scope || scope.kind !== "inventory" || fixInFlight.current) return;
    const ok = window.confirm(t("invFixConfirm"));
    if (!ok) return;
    fixInFlight.current = true;
    setFixing(true);
    setFixError(null);
    setFixMessage(null);
    try {
      const res = await runStockLedgerFixInventoryScope(scope.id);
      setFixMessage(
        t("invFixDone", {
          id: scope.id,
          lot: res.filledLotLineId,
          uom: res.filledUomId,
          inventory: res.filledInventoryId,
          lotQty: res.filledLotQty,
          balance: res.filledBalance,
          dayRows: res.dayRowsWritten,
        }),
      );
      await loadInventoryScope(scope.id);
    } catch (e) {
      console.error(e);
      setFixError(apiErrorMessage(e, t("fixFailed")));
    } finally {
      setFixing(false);
      fixInFlight.current = false;
    }
  };

  const onFixLotScope = async () => {
    if (!scope || scope.kind !== "lot" || fixInFlight.current) return;
    const ok = window.confirm(t("lotFixConfirm"));
    if (!ok) return;
    fixInFlight.current = true;
    setFixing(true);
    setFixError(null);
    setFixMessage(null);
    try {
      const res = await runStockLedgerFixLotScope(scope.id);
      setFixMessage(
        t("lotFixDone", {
          id: scope.id,
          lot: res.filledLotLineId,
          uom: res.filledUomId,
          inventory: res.filledInventoryId,
          lotQty: res.filledLotQty,
          dayRows: res.dayRowsWritten,
        }),
      );
      await loadLotScope(scope.id);
    } catch (e) {
      console.error(e);
      setFixError(apiErrorMessage(e, t("fixFailed")));
    } finally {
      setFixing(false);
      fixInFlight.current = false;
    }
  };

  const canFixDay = Boolean(selected && !selected.isAfter(dayjs(), "day"));

  const onFixDayRange = async () => {
    if (fixInFlight.current) return;
    const from = chainFrom.trim();
    const to = chainTo.trim();
    const today = dayjs().format("YYYY-MM-DD");
    if (!from || !to) {
      setFixError(t("rangeFromRequired"));
      return;
    }
    if (to < from) {
      setFixError(t("toMustBeGteFrom"));
      return;
    }
    if (from < FIRST_LEDGER_DAY.format("YYYY-MM-DD")) {
      setFixError(t("fromTooEarly", { date: FIRST_LEDGER_DAY.format("YYYY-MM-DD") }));
      return;
    }
    if (to > today) {
      setFixError(t("cannotFixFutureRange"));
      return;
    }
    const picked = selectedDaySteps(daySteps);
    if (picked.length === 0) {
      setFixError(t("pickAtLeastOneStep"));
      return;
    }
    const steps = stepsPayload(daySteps);
    const stepLabel = steps?.join(listSep) ?? t("allSteps216");
    const ok = window.confirm(
      t("rangeConfirm", { from, to, steps: stepLabel }),
    );
    if (!ok) return;

    fixInFlight.current = true;
    setChainRunning(true);
    setFixing(true);
    setFixError(null);
    setFixMessage(null);
    setChainProgress(t("rangeProgress", { from, to, steps: stepLabel }));
    try {
      const res = await runStockLedgerFixRange(from, to, steps);
      setFixMessage(
        t("rangeDone", {
          date: res.date,
          steps: stepLabel,
          lot: res.filledLotLineId,
          uom: res.filledUomId,
          inventory: res.filledInventoryId,
          lotQty: res.filledLotQty,
          balance: res.filledBalance,
          dayRows: res.dayRowsWritten,
        }),
      );
      setSelected(dayjs(to));
      setChainProgress(null);
    } catch (e) {
      console.error(e);
      setFixError(apiErrorMessage(e, t("rangeFail")));
    } finally {
      setFixing(false);
      setChainRunning(false);
      fixInFlight.current = false;
    }
  };

  const onExportSql = async () => {
    if (exportInFlight.current) return;
    const from = exportFrom.trim();
    const to = exportTo.trim();
    if (!from || !to) {
      setExportError(t("exportFromToRequired"));
      return;
    }
    if (to < from) {
      setExportError(t("toMustBeGteFrom"));
      return;
    }
    const picked = selectedExportParts(exportParts);
    if (picked.length === 0) {
      setExportError(t("exportPickAtLeastOne"));
      return;
    }
    if (exportParts["2.3"] && !exportParts["1.0"]) {
      const ok = window.confirm(t("export23Without10"));
      if (!ok) return;
    }
    const parts = exportPartsPayload(exportParts);
    exportInFlight.current = true;
    setExporting(true);
    setExportError(null);
    try {
      await downloadStockLedgerFixSql(from, to, parts);
    } catch (e) {
      console.error(e);
      const data = (e as { response?: { data?: unknown } })?.response?.data;
      if (data instanceof Blob) {
        try {
          const text = (await data.text()).trim().slice(0, 400);
          setExportError(text || t("exportFail"));
        } catch {
          setExportError(apiErrorMessage(e, t("exportFail")));
        }
      } else {
        setExportError(apiErrorMessage(e, t("exportFail")));
      }
    } finally {
      setExporting(false);
      exportInFlight.current = false;
    }
  };

  return (
    <Stack spacing={3}>
      <Paper sx={{ p: 2 }}>
        <Stack spacing={1.5}>
          <Typography variant="h6">{t("inventory10Title")}</Typography>
          <Typography variant="body2" color="text.secondary">
            {t("inventory10Description")}
          </Typography>
          {inventoryError && <Alert severity="error">{inventoryError}</Alert>}
          {inventoryMessage && (
            <Alert severity="success">{inventoryMessage}</Alert>
          )}
          {inventoryLoading && !inventoryPreview && <CircularProgress size={24} />}
          {inventoryPreview && (
            <Typography variant="body2">
              {t("inventory10Preview", {
                rows: inventoryPreview.inventoryRows,
                lotPairs: inventoryPreview.lotUomPairs,
                missing: inventoryPreview.missingUomPairs,
                nullUom: inventoryPreview.nullStockUomId,
              })}
            </Typography>
          )}
          <Box>
            <Button
              variant="contained"
              color="warning"
              disabled={inventoryRunning || inventoryLoading}
              onClick={() => void onInventory()}
            >
              {inventoryRunning ? t("inventory10Running") : t("inventory10Run")}
            </Button>
          </Box>
        </Stack>
      </Paper>

      <Paper sx={{ p: 2 }}>
        <Stack spacing={1.5}>
          <Typography variant="h6">{t("adjTitle")}</Typography>
          <Typography variant="body2" color="text.secondary">
            {t("adjDescription")}
          </Typography>
          <Stack direction="row" spacing={1} alignItems="center" flexWrap="wrap" useFlexGap>
            <TextField
              size="small"
              type="date"
              label={t("adjDateLabel")}
              value={adjDate}
              onChange={(e) => {
                setAdjDate(e.target.value);
                setAdjPreview(null);
                setAdjMessage(null);
              }}
              disabled={adjLoading || adjRunning}
              InputLabelProps={{ shrink: true }}
              inputProps={{ max: dayjs().format("YYYY-MM-DD") }}
            />
            <Button
              size="small"
              disabled={adjLoading || adjRunning}
              onClick={() => {
                setAdjDate(dayjs().format("YYYY-MM-DD"));
                setAdjPreview(null);
              }}
            >
              {t("adjTodayFreeze")}
            </Button>
            <Button
              size="small"
              disabled={adjLoading || adjRunning}
              onClick={() => {
                setAdjDate(dayjs().subtract(1, "day").format("YYYY-MM-DD"));
                setAdjPreview(null);
              }}
            >
              {t("adjYesterday")}
            </Button>
          </Stack>
          {adjError && <Alert severity="error">{adjError}</Alert>}
          {adjMessage && <Alert severity="success">{adjMessage}</Alert>}
          {adjLoading && !adjPreview && <CircularProgress size={24} />}
          {adjPreview && (
            <Typography variant="body2">
              {t("adjPreviewSummary", {
                date: adjPreview.adjDate,
                lotCount: adjPreview.lotCount,
                overIssueCount: adjPreview.overIssueCount,
                sumOverIssue: adjPreview.sumOverIssue,
                adjInCount: adjPreview.adjInCount,
                adjOutCount: adjPreview.adjOutCount,
                sumMissIn: adjPreview.sumMissIn,
                sumMissOut: adjPreview.sumMissOut,
                skuNet: adjPreview.skuNet,
                skuNetNote:
                  adjPreview.skuNet !== "0" ? t("adjSkuNetNote") : "",
                revNote:
                  adjPreview.skippedNegCount > 0
                    ? t("adjRevNote", { count: adjPreview.skippedNegCount })
                    : "",
              })}
            </Typography>
          )}
          {adjPreview && adjPreview.rows.length > 0 && (
            <Table size="small">
              <TableHead>
                <TableRow>
                  <TableCell>{t("adjColLotLineId")}</TableCell>
                  <TableCell>{t("adjColItemCode")}</TableCell>
                  <TableCell align="right">{t("adjColLineInOut")}</TableCell>
                  <TableCell align="right">{t("adjColLedgerInOut")}</TableCell>
                  <TableCell align="right">{t("adjColMissIn")}</TableCell>
                  <TableCell align="right">{t("adjColMissOut")}</TableCell>
                  <TableCell align="right">{t("adjColOverIssue")}</TableCell>
                </TableRow>
              </TableHead>
              <TableBody>
                {adjPreview.rows.map((r) => (
                  <TableRow key={r.lotLineId}>
                    <TableCell>{r.lotLineId}</TableCell>
                    <TableCell>{r.itemCode ?? t("checkDash")}</TableCell>
                    <TableCell align="right">
                      {r.lineIn} / {r.lineOut}
                    </TableCell>
                    <TableCell align="right">
                      {r.ledgerIn} / {r.ledgerOut}
                    </TableCell>
                    <TableCell align="right">{r.missIn}</TableCell>
                    <TableCell align="right">{r.missOut}</TableCell>
                    <TableCell align="right">{r.overIssue}</TableCell>
                  </TableRow>
                ))}
              </TableBody>
            </Table>
          )}
          <Stack direction="row" spacing={1}>
            <Button
              variant="outlined"
              disabled={adjLoading || adjRunning}
              onClick={() => void loadAdjPreview()}
            >
              {adjLoading
                ? t("adjPreviewing")
                : adjPreview
                  ? t("adjPreviewAgain")
                  : t("adjPreview")}
            </Button>
            <Button
              variant="contained"
              color="warning"
              disabled={adjRunning || adjLoading || !adjPreview}
              onClick={() => void onAdjApply()}
            >
              {adjRunning ? t("adjApplying") : t("adjApply")}
            </Button>
          </Stack>
        </Stack>
      </Paper>

      <Paper sx={{ px: 2, pt: 1 }}>
        <Tabs
          value={tab}
          onChange={(_, v: "day" | "inventory" | "lot") => {
            setTab(v);
            setFixError(null);
            setFixMessage(null);
            setSearchError(null);
          }}
        >
          <Tab label={t("tabCalendar")} value="day" />
          <Tab label={t("tabInventory")} value="inventory" />
          <Tab label={t("tabLot")} value="lot" />
        </Tabs>
      </Paper>

      {tab === "day" && (
        <Stack
          direction={{ xs: "column", md: "row" }}
          spacing={3}
          alignItems="flex-start"
          sx={{ width: "100%", minWidth: 0 }}
        >
          <Paper sx={{ p: 1, maxWidth: 360, width: "100%", flex: "0 0 auto" }}>
            <LocalizationProvider
              dateAdapter={AdapterDayjs}
              adapterLocale={isZh ? "zh-hk" : "en"}
            >
              <DateCalendar
                value={selected}
                onChange={(v) => setSelected(v)}
                views={["year", "month", "day"]}
                openTo="day"
                minDate={FIRST_LEDGER_DAY}
                maxDate={dayjs()}
              />
            </LocalizationProvider>
            <Typography
              variant="caption"
              color="text.secondary"
              sx={{ px: 2, pb: 1, display: "block", whiteSpace: "pre-line" }}
            >
              {t("calendarHint")}
            </Typography>
          </Paper>

          <Paper sx={{ p: 2, flex: 1, minWidth: 0, maxWidth: "100%", width: { xs: "100%", md: "auto" } }}>
            <Stack spacing={2}>
              <Typography variant="h6">
                {selected ? selected.format("YYYY-MM-DD") : t("selectDate")}
              </Typography>
              {detailError && <Alert severity="error">{detailError}</Alert>}
              {fixError && <Alert severity="error">{fixError}</Alert>}
              {fixMessage && <Alert severity="success">{fixMessage}</Alert>}
              {chainProgress && <Alert severity="info">{chainProgress}</Alert>}
              {detailLoading && <CircularProgress size={24} />}
              {detail && !detailLoading && (
                <>
                  <Typography variant="body2" color="text.secondary">
                    {t("dayLedgerCount", { cnt: detail.cnt })}
                  </Typography>
                  <CheckPartsTable parts={detail.parts} />
                </>
              )}
              <Box>
                <Typography variant="subtitle2" sx={{ mb: 0.5 }}>
                  {t("stepsTitle")}
                </Typography>
                <Typography variant="body2" color="text.secondary" sx={{ mb: 0.5 }}>
                  {t("stepsHint")}
                </Typography>
                <Stack direction="row" spacing={0} flexWrap="wrap" useFlexGap>
                  {DAY_FIX_STEPS.map((step) => (
                    <FormControlLabel
                      key={step}
                      sx={{
                        mr: 1,
                        "& .MuiFormControlLabel-label": { whiteSpace: "normal" },
                      }}
                      control={
                        <Checkbox
                          size="small"
                          checked={daySteps[step]}
                          disabled={fixing || chainRunning}
                          onChange={(_, checked) =>
                            setDaySteps((prev) => ({ ...prev, [step]: checked }))
                          }
                        />
                      }
                      label={t(DAY_STEP_I18N[step])}
                    />
                  ))}
                  <Button
                    size="small"
                    disabled={fixing || chainRunning}
                    onClick={() => setDaySteps(ALL_DAY_STEPS)}
                  >
                    {t("selectAll")}
                  </Button>
                </Stack>
              </Box>
              <Box>
                <Button
                  variant="contained"
                  disabled={!canFixDay || fixing || chainRunning}
                  onClick={() => void onFixDay()}
                >
                  {fixing && !chainRunning ? t("fixing") : t("fixThisDay")}
                </Button>
              </Box>
              <Box sx={{ pt: 1 }}>
                <Typography variant="subtitle2" sx={{ mb: 1 }}>
                  {t("rangeTitle")}
                </Typography>
                <Typography variant="body2" color="text.secondary" sx={{ mb: 1 }}>
                  {t("rangeHint")}
                </Typography>
                <Stack direction="row" spacing={1} alignItems="center" flexWrap="wrap" useFlexGap>
                  <TextField
                    size="small"
                    type="date"
                    label={t("from")}
                    value={chainFrom}
                    onChange={(e) => setChainFrom(e.target.value)}
                    disabled={chainRunning}
                    InputLabelProps={{ shrink: true }}
                  />
                  <TextField
                    size="small"
                    type="date"
                    label={t("to")}
                    value={chainTo}
                    onChange={(e) => setChainTo(e.target.value)}
                    disabled={chainRunning}
                    InputLabelProps={{ shrink: true }}
                  />
                  <Button
                    variant="contained"
                    disabled={fixing || chainRunning}
                    onClick={() => void onFixDayRange()}
                  >
                    {chainRunning ? t("rangeRunning") : t("rangeRun")}
                  </Button>
                </Stack>
              </Box>
              <Box sx={{ pt: 1 }}>
                <Typography variant="subtitle2" sx={{ mb: 1 }}>
                  {t("exportTitle")}
                </Typography>
                <Typography variant="body2" color="text.secondary" sx={{ mb: 1 }}>
                  {t("exportHint")}
                </Typography>
                <Stack direction="row" spacing={0} flexWrap="wrap" useFlexGap sx={{ mb: 1 }}>
                  {EXPORT_PARTS.map((part) => (
                    <FormControlLabel
                      key={part}
                      sx={{
                        mr: 1,
                        maxWidth: "100%",
                        "& .MuiFormControlLabel-label": { whiteSpace: "normal" },
                      }}
                      control={
                        <Checkbox
                          size="small"
                          checked={exportParts[part]}
                          disabled={exporting}
                          onChange={(_, checked) =>
                            setExportParts((prev) => ({ ...prev, [part]: checked }))
                          }
                        />
                      }
                      label={t(EXPORT_PART_I18N[part])}
                    />
                  ))}
                  <Button
                    size="small"
                    disabled={exporting}
                    onClick={() => setExportParts(DEFAULT_EXPORT_PARTS)}
                  >
                    {t("exportDefault")}
                  </Button>
                  <Button
                    size="small"
                    disabled={exporting}
                    onClick={() => setExportParts(FULL_EXPORT_PARTS)}
                  >
                    {t("exportFull")}
                  </Button>
                </Stack>
                {exportError && <Alert severity="error">{exportError}</Alert>}
                <Stack direction="row" spacing={1} alignItems="center" flexWrap="wrap" useFlexGap>
                  <TextField
                    size="small"
                    type="date"
                    label={t("from")}
                    value={exportFrom}
                    onChange={(e) => setExportFrom(e.target.value)}
                    InputLabelProps={{ shrink: true }}
                  />
                  <TextField
                    size="small"
                    type="date"
                    label={t("to")}
                    value={exportTo}
                    onChange={(e) => setExportTo(e.target.value)}
                    InputLabelProps={{ shrink: true }}
                  />
                  <Button
                    variant="outlined"
                    disabled={exporting}
                    onClick={() => void onExportSql()}
                  >
                    {exporting ? t("exporting") : t("exportSql")}
                  </Button>
                </Stack>
              </Box>
            </Stack>
          </Paper>
        </Stack>
      )}

      {tab === "inventory" && (
        <Paper sx={{ p: 2 }}>
          <Stack spacing={2}>
            <Typography variant="body2" color="text.secondary">
              {t("invTabHint")}
            </Typography>
            <Stack direction="row" spacing={1}>
              <TextField
                size="small"
                label={t("invSearchLabel")}
                value={invQuery}
                onChange={(e) => setInvQuery(e.target.value)}
                onKeyDown={(e) => {
                  if (e.key === "Enter") void onSearchInventory();
                }}
              />
              <Button
                variant="outlined"
                disabled={searching || !invQuery.trim()}
                onClick={() => void onSearchInventory()}
              >
                {searching ? t("searching") : t("search")}
              </Button>
            </Stack>
            {searchError && <Alert severity="error">{searchError}</Alert>}
            {invHits.length > 0 && (
              <Table size="small">
                <TableHead>
                  <TableRow>
                    <TableCell>{t("colInventoryId")}</TableCell>
                    <TableCell>{t("colItemCode")}</TableCell>
                    <TableCell>{t("colUomId")}</TableCell>
                    <TableCell align="right">{t("colLedgerRows")}</TableCell>
                  </TableRow>
                </TableHead>
                <TableBody>
                  {invHits.map((h) => (
                    <TableRow
                      key={h.inventoryId}
                      hover
                      selected={scope?.kind === "inventory" && scope.id === h.inventoryId}
                      onClick={() => void loadInventoryScope(h.inventoryId)}
                      sx={{ cursor: "pointer" }}
                    >
                      <TableCell>{h.inventoryId}</TableCell>
                      <TableCell>{h.itemCode ?? t("checkDash")}</TableCell>
                      <TableCell>{h.uomId ?? t("checkDash")}</TableCell>
                      <TableCell align="right">{h.ledgerCnt}</TableCell>
                    </TableRow>
                  ))}
                </TableBody>
              </Table>
            )}
            {fixError && <Alert severity="error">{fixError}</Alert>}
            {fixMessage && <Alert severity="success">{fixMessage}</Alert>}
            {scopeLoading && <CircularProgress size={24} />}
            {scope?.kind === "inventory" && !scopeLoading && (
              <>
                <Typography variant="body2">
                  {t("invScopeSummary", {
                    itemCode: scope.itemCode ?? "?",
                    id: scope.id,
                    uomId: scope.uomId ?? "?",
                    firstDate: scope.firstDate,
                    lastDate: scope.lastDate,
                    cnt: scope.cnt,
                    lastBalance: scope.lastBalance ?? t("checkDash"),
                  })}
                </Typography>
                <CheckPartsTable parts={scope.parts} />
                <Box>
                  <Button
                    variant="contained"
                    disabled={fixing || scope.cnt === 0}
                    onClick={() => void onFixInventoryScope()}
                  >
                    {fixing ? t("fixing") : t("fixThisInventory")}
                  </Button>
                </Box>
              </>
            )}
          </Stack>
        </Paper>
      )}

      {tab === "lot" && (
        <Paper sx={{ p: 2 }}>
          <Stack spacing={2}>
            <Typography variant="body2" color="text.secondary">
              {t("lotTabHint")}
            </Typography>
            <Stack direction="row" spacing={1}>
              <TextField
                size="small"
                label={t("lotSearchLabel")}
                value={lotQuery}
                onChange={(e) => setLotQuery(e.target.value)}
                onKeyDown={(e) => {
                  if (e.key === "Enter") void onSearchLot();
                }}
              />
              <Button
                variant="outlined"
                disabled={searching || !lotQuery.trim()}
                onClick={() => void onSearchLot()}
              >
                {searching ? t("searching") : t("search")}
              </Button>
            </Stack>
            {searchError && <Alert severity="error">{searchError}</Alert>}
            {lotHits.length > 0 && (
              <Table size="small">
                <TableHead>
                  <TableRow>
                    <TableCell>{t("colLotLineId")}</TableCell>
                    <TableCell>{t("colLotNo")}</TableCell>
                    <TableCell>{t("colItemCode")}</TableCell>
                    <TableCell>{t("colInventoryId")}</TableCell>
                    <TableCell align="right">{t("colLedgerRows")}</TableCell>
                  </TableRow>
                </TableHead>
                <TableBody>
                  {lotHits.map((h) => (
                    <TableRow
                      key={h.inventoryLotLineId}
                      hover
                      selected={scope?.kind === "lot" && scope.id === h.inventoryLotLineId}
                      onClick={() => void loadLotScope(h.inventoryLotLineId)}
                      sx={{ cursor: "pointer" }}
                    >
                      <TableCell>{h.inventoryLotLineId}</TableCell>
                      <TableCell>{h.lotNo ?? t("checkDash")}</TableCell>
                      <TableCell>{h.itemCode ?? t("checkDash")}</TableCell>
                      <TableCell>{h.inventoryId ?? t("checkDash")}</TableCell>
                      <TableCell align="right">{h.ledgerCnt}</TableCell>
                    </TableRow>
                  ))}
                </TableBody>
              </Table>
            )}
            {fixError && <Alert severity="error">{fixError}</Alert>}
            {fixMessage && <Alert severity="success">{fixMessage}</Alert>}
            {scopeLoading && <CircularProgress size={24} />}
            {scope?.kind === "lot" && !scopeLoading && (
              <>
                <Typography variant="body2">
                  {t("lotScopeSummary", {
                    lotNo: scope.lotNo ?? "?",
                    id: scope.id,
                    itemCode: scope.itemCode ?? "?",
                    firstDate: scope.firstDate,
                    lastDate: scope.lastDate,
                    cnt: scope.cnt,
                    lastLotQtyAfter: scope.lastLotQtyAfter ?? t("checkDash"),
                  })}
                </Typography>
                <CheckPartsTable parts={scope.parts} />
                <Box>
                  <Button
                    variant="contained"
                    disabled={fixing || scope.cnt === 0}
                    onClick={() => void onFixLotScope()}
                  >
                    {fixing ? t("fixing") : t("fixThisLot")}
                  </Button>
                </Box>
              </>
            )}
          </Stack>
        </Paper>
      )}
    </Stack>
  );
};

export default StockLedgerFixPageClient;