"use client";

import { PurchaseOrderLine } from "@/app/api/po";
import {
  Box,
  Button,
  Radio,
  TableCell,
  TableRow,
  TextField,
  alpha,
} from "@mui/material";
import { memo, useCallback, useEffect, useRef, useState } from "react";
import { useTranslation } from "react-i18next";
import { decimalFormatter, integerFormatter } from "@/app/utils/formatUtil";
import { submitDialogWithWarning } from "../Swal/CustomAlerts";
import { createStockInLine } from "@/app/api/stockIn/actions";
import { previewPoBatchStockQty } from "./stockQtyRound";

const PURCHASE_STOCK_IN_ALERT_STATUSES = new Set(["pending", "receiving"]);

function totalPutAwayStockQtyForPol(row: PurchaseOrderLine): number {
  return row.stockInLine
    .filter((sil) => sil.purchaseOrderLineId === row.id)
    .reduce((acc, sil) => {
      const lineSum =
        sil.putAwayLines?.reduce(
          (s, p) => s + Number(p.stockQty ?? p.qty ?? 0),
          0,
        ) ?? 0;
      return acc + lineSum;
    }, 0);
}

function polOrderStockQty(row: PurchaseOrderLine): number {
  return Number(row.stockUom?.stockQty ?? row.qty ?? 0);
}

function purchaseOrderLineHasIncompleteStockIn(row: PurchaseOrderLine): boolean {
  const orderStock = polOrderStockQty(row);
  const putAway = totalPutAwayStockQtyForPol(row);
  if (orderStock > 0 && putAway >= orderStock) {
    return false;
  }
  return row.stockInLine
    .filter((sil) => sil.purchaseOrderLineId === row.id)
    .some((sil) =>
      PURCHASE_STOCK_IN_ALERT_STATUSES.has((sil.status ?? "").toLowerCase().trim()),
    );
}

export type PoDetailRowDnValues = {
  dnNo?: string;
  receiptDate?: string;
};

type Props = {
  row: PurchaseOrderLine;
  selected: boolean;
  canSeeStockInReminders: boolean;
  showDnQty: boolean;
  savedLotNo: string;
  savedDnQty: string;
  onSelect: (row: PurchaseOrderLine) => void;
  onInputBlur: (rowId: number, lotNo: string, dnQty: string) => void;
  getDnValues: () => PoDetailRowDnValues;
  formatReceiptDate: (receiptDate?: string) => string | undefined;
  onSubmitted: (row: PurchaseOrderLine) => void;
};

/** FP-MTMS Version Checklist | Functions Ref. No. 56 | v1.0.4 | 2026-09-10 */
export const PoDetailRow = memo(function PoDetailRow({
  row,
  selected,
  canSeeStockInReminders,
  showDnQty,
  savedLotNo,
  savedDnQty,
  onSelect,
  onInputBlur,
  getDnValues,
  formatReceiptDate,
  onSubmitted,
}: Props) {
  const { t } = useTranslation("purchaseOrder");
  const [lotNoInput, setLotNoInput] = useState(savedLotNo);
  const [dnQtyInput, setDnQtyInput] = useState(savedDnQty);
  const submitInFlightRef = useRef(false);
  const [isStarting, setIsStarting] = useState(false);

  useEffect(() => {
    setLotNoInput(savedLotNo);
    setDnQtyInput(savedDnQty.replace(/[^\d]/g, ""));
  }, [savedLotNo, savedDnQty]);

  const handleStart = useCallback(
    () => {
      if (submitInFlightRef.current || isStarting) return;
      const orderQty = Number(row?.qty) ?? 0;
      const acceptedQty = Number(dnQtyInput.trim());

      if (!Number.isInteger(acceptedQty) || acceptedQty <= 0) {
        alert("來貨數量必須為大於0的整數！");
        return;
      }

      const previewStockQty = previewPoBatchStockQty(
        orderQty,
        Number(row.stockUom?.stockQty ?? 0),
        acceptedQty,
      );

      const doSubmit = () => {
        if (submitInFlightRef.current) return;
        submitInFlightRef.current = true;
        setIsStarting(true);
        void (async () => {
          try {
            const dn = getDnValues();
            const postData = {
              dnNo: dn.dnNo,
              receiptDate: formatReceiptDate(dn.receiptDate),
              itemId: row.itemId,
              itemNo: row.itemNo,
              itemName: row.itemName,
              purchaseOrderLineId: row.id,
              acceptedQty: acceptedQty,
              productLotNo: lotNoInput || "",
            };
            const res = await createStockInLine(postData);
            if (res) {
              setLotNoInput("");
              setDnQtyInput("");
              onSubmitted(row);
            }
            console.log(res);
          } finally {
            setIsStarting(false);
            submitInFlightRef.current = false;
          }
        })();
      };

      const sils = row.stockInLine ?? [];
      const alreadyM18 = sils.reduce(
        (acc, sil) => acc + Number(sil.purchaseAcceptedQty ?? 0),
        0,
      );
      const alreadyStock = sils.reduce(
        (acc, sil) => acc + Number(sil.acceptedQty ?? 0),
        0,
      );
      const stockDemand = Number(row.stockUom?.stockQty ?? 0);
      const thisBatchStock = previewStockQty;
      const exceedByOrderUnit =
        orderQty > 0 && alreadyM18 + acceptedQty > orderQty * 1.1;
      const exceedByStockUnit =
        stockDemand > 0 && alreadyStock + thisBatchStock > stockDemand * 1.1;
      if (exceedByOrderUnit || exceedByStockUnit) {
        submitDialogWithWarning(doSubmit, t, {
          title: t("Confirm submit"),
          html: t("qtyExceedsOrderConfirm"),
          confirmButtonText: t("Submit"),
        });
      } else {
        doSubmit();
      }
    },
    [
      dnQtyInput,
      formatReceiptDate,
      getDnValues,
      isStarting,
      lotNoInput,
      onSubmitted,
      row,
      t,
    ],
  );

  const totalStockReceived = row.stockInLine
    .filter((sil) => sil.purchaseOrderLineId === row.id)
    .reduce((acc, cur) => acc + (cur.acceptedQty ?? 0), 0);
  const receivedTotalText = decimalFormatter.format(totalStockReceived);
  const highlightColor =
    Number(receivedTotalText.replace(/,/g, "")) <= 0 ? "red" : "inherit";
  const needsStockInAttention =
    canSeeStockInReminders && purchaseOrderLineHasIncompleteStockIn(row);

  return (
    <TableRow
      hover
      title={
        needsStockInAttention
          ? "採購入庫未完成：此採購明細尚有入庫單為「待處理」或「收貨中」，請於下方完成入庫。"
          : undefined
      }
      sx={{
        "& > *": { borderBottom: "unset" },
        color: "black",
        ...(needsStockInAttention
          ? (theme) => ({
              boxShadow: `inset 4px 0 0 ${theme.palette.error.main}`,
              backgroundColor: alpha(theme.palette.error.main, 0.07),
            })
          : {}),
      }}
      onClick={() => onSelect(row)}
    >
      <TableCell align="center" sx={{ width: "60px", position: "relative" }}>
        {needsStockInAttention && (
          <Box
            component="span"
            aria-hidden
            sx={{
              position: "absolute",
              top: 6,
              left: 8,
              width: 10,
              height: 10,
              borderRadius: "50%",
              bgcolor: "error.main",
              border: "2px solid",
              borderColor: "background.paper",
              boxShadow: (theme) => `0 0 0 1px ${alpha(theme.palette.error.main, 0.45)}`,
              zIndex: 1,
            }}
          />
        )}
        <Radio checked={selected} />
      </TableCell>
      <TableCell
        align="left"
        sx={{ width: 88, maxWidth: 88, px: 1, whiteSpace: "nowrap", overflow: "hidden", textOverflow: "ellipsis" }}
        title={row.itemNo}
      >
        {row.itemNo}
      </TableCell>
      <TableCell
        align="left"
        sx={{ width: 100, maxWidth: 100, px: 1, whiteSpace: "nowrap", overflow: "hidden", textOverflow: "ellipsis" }}
        title={row.itemName}
      >
        {row.itemName}
      </TableCell>
      <TableCell align="right">{integerFormatter.format(row.qty)}</TableCell>
      <TableCell align="right">{integerFormatter.format(row.processed)}</TableCell>
      <TableCell align="left">{row.uom?.udfudesc}</TableCell>
      <TableCell sx={{ color: highlightColor }} align="right">
        {decimalFormatter.format(totalStockReceived)}
      </TableCell>
      <TableCell sx={{ color: highlightColor }} align="left">
        {row.stockUom.stockUomDesc}
      </TableCell>
      <TableCell sx={{ color: highlightColor }} align="left">
        {t(`${row.status.toLowerCase()}`)}
      </TableCell>
      <TableCell align="center">
        <TextField
          id={`lotNo-${row.id}`}
          label="輸入貨品批號"
          type="text"
          variant="outlined"
          value={lotNoInput}
          onChange={(e) => setLotNoInput(e.target.value)}
          onBlur={() => onInputBlur(row.id, lotNoInput, dnQtyInput)}
          onClick={(e) => e.stopPropagation()}
        />
      </TableCell>
      {showDnQty ? (
        <TableCell align="center">
          <TextField
            id={`dnQty-${row.id}`}
            label="此批來貨數量"
            type="text"
            variant="outlined"
            value={dnQtyInput}
            onChange={(e) => setDnQtyInput(e.target.value.replace(/[^\d]/g, ""))}
            onBlur={() => onInputBlur(row.id, lotNoInput, dnQtyInput)}
            onClick={(e) => e.stopPropagation()}
            InputProps={{
              inputProps: {
                min: 1,
                step: 1,
                inputMode: "numeric",
                pattern: "[0-9]*",
              },
            }}
          />
        </TableCell>
      ) : null}
      <TableCell align="center">
        <Button
          variant="contained"
          disabled={isStarting}
          onMouseDown={(e) => {
            e.preventDefault();
            e.stopPropagation();
          }}
          onClick={(e) => {
            e.stopPropagation();
            handleStart();
          }}
        >
          {t("submit")}
        </Button>
      </TableCell>
    </TableRow>
  );
});