import dayjs from "dayjs";
import type { TFunction } from "i18next";
import { exportMultiSheetToXlsx } from "@/app/(main)/chart/_components/exportChartToXlsx";
import type {
  DrinkProductionQtyJobOrderDetail,
  DrinkProductionQtyResponse,
  DrinkShipmentQtyResponse,
} from "@/app/api/jo/actions";

export type DrinkViewMode = "actual" | "planned" | "shipment";

const formatDateTime = (value: unknown): string => {
  if (value == null || value === "") return "";
  if (Array.isArray(value)) {
    const [y, m, d, h = 0, min = 0] = value as number[];
    if (y == null || m == null || d == null) return "";
    return dayjs(new Date(y, m - 1, d, h, min)).format("YYYY-MM-DD HH:mm");
  }
  const parsed = dayjs(value as string);
  return parsed.isValid() ? parsed.format("YYYY-MM-DD HH:mm") : String(value);
};

const formatDate = (value: string | null | undefined): string => {
  if (!value) return "";
  const parsed = dayjs(value);
  return parsed.isValid() ? parsed.format("YYYY-MM-DD") : value;
};

export type ExportDrinkProductionQtyParams = {
  data: DrinkProductionQtyResponse[];
  shipmentData?: DrinkShipmentQtyResponse[];
  viewMode: DrinkViewMode;
  selectedDate: string;
  statusFilter: string;
  t: TFunction;
};

const viewModeLabel = (viewMode: DrinkViewMode, t: TFunction): string => {
  switch (viewMode) {
    case "planned":
      return t("Drink detail mode: planned");
    case "shipment":
      return t("Drink detail mode: shipment");
    case "actual":
      return t("Drink detail mode: actual");
    default: {
      const _exhaustive: never = viewMode;
      return _exhaustive;
    }
  }
};

const formatDoStatus = (status: string | null | undefined, t: TFunction): string => {
  if (!status) return "";
  switch (status.toLowerCase()) {
    case "pending":
      return t("Drink do status pending");
    case "receiving":
      return t("Drink do status receiving");
    case "completed":
      return t("Drink do status completed");
    default:
      return t(status, { ns: "do", defaultValue: status });
  }
};

export function exportDrinkProductionQtyXlsx({
  data,
  shipmentData = [],
  viewMode,
  selectedDate,
  statusFilter,
  t,
}: ExportDrinkProductionQtyParams): void {
  const viewLabel = viewModeLabel(viewMode, t);
  const statusFilterLabel = statusFilter
    ? t(statusFilter, { ns: "jo", defaultValue: statusFilter })
    : t("All");
  const exportedAt = dayjs().format("YYYY-MM-DD HH:mm:ss");

  if (viewMode === "shipment") {
    const doRows: Record<string, unknown>[] = [];
    const itemRows = shipmentData.map((item) => {
      for (const delivery of item.deliveries ?? []) {
        doRows.push({
          [t("Export meta: exported at")]: exportedAt,
          [t("Drink detail mode label")]: viewLabel,
          [t("Date")]: selectedDate,
          [t("Item Code")]: item.itemCode ?? "",
          [t("Goods Name")]: item.itemName ?? "",
          [t("Unit")]: item.uom ?? "",
          [t("Delivery Order Code", { ns: "do" })]: delivery.deliveryOrderCode ?? "",
          [t("Delivery Order Status", { ns: "do" })]: formatDoStatus(
            delivery.deliveryOrderStatus,
            t,
          ),
          [t("Shop Name", { ns: "do" })]:
            delivery.shopName || delivery.shopCode || "",
          [t("Delivery Date", { ns: "do" })]: formatDate(delivery.deliveryDate),
          [t("Shipment Order Qty")]: delivery.orderQty ?? 0,
          [t("Shipped Qty")]: delivery.shippedQty ?? 0,
        });
      }
      return {
        [t("Export meta: exported at")]: exportedAt,
        [t("Drink detail mode label")]: viewLabel,
        [t("Date")]: selectedDate,
        [t("Item Code")]: item.itemCode ?? "",
        [t("Goods Name")]: item.itemName ?? "",
        [t("Unit")]: item.uom ?? "",
        [t("Shipment Order Qty")]: item.totalOrderQty ?? 0,
        [t("Shipped Qty")]: item.totalShippedQty ?? 0,
        [t("DO count")]: (item.deliveries ?? []).length,
      };
    });
    const filename = `DrinkProductionQty_shipment_${selectedDate}_${dayjs().format("HHmm")}`;
    exportMultiSheetToXlsx(
      [
        { name: t("Excel sheet: DO detail"), rows: doRows },
        { name: t("Excel sheet: item summary"), rows: itemRows },
      ],
      filename,
    );
    return;
  }

  const filterJos = (
    jobOrders: DrinkProductionQtyJobOrderDetail[],
  ): DrinkProductionQtyJobOrderDetail[] => {
    if (!statusFilter) return jobOrders;
    return jobOrders.filter((jo) => jo.jobOrderStatus === statusFilter);
  };

  const joRows: Record<string, unknown>[] = [];
  const stepRows: Record<string, unknown>[] = [];

  for (const item of data) {
    for (const jo of filterJos(item.jobOrders ?? [])) {
      joRows.push({
        [t("Export meta: exported at")]: exportedAt,
        [t("Drink detail mode label")]: viewLabel,
        [t("Date")]: selectedDate,
        [t("Job Order Status") + ` (${t("Filter")})`]: statusFilterLabel,
        [t("Item Code")]: item.itemCode ?? "",
        [t("Goods Name")]: item.itemName ?? "",
        [t("Unit")]: item.uom ?? "",
        [t("Job Order Code")]: jo.jobOrderCode ?? "",
        [t("Job Order Status")]: jo.jobOrderStatus
          ? t(jo.jobOrderStatus, { ns: "jo", defaultValue: jo.jobOrderStatus })
          : "",
        [t("Production Date")]: formatDate(jo.productionDate),
        [viewMode === "planned"
          ? t("Planned Output Qty")
          : t("Stock Req. Qty")]: jo.reqQty ?? 0,
        [viewMode === "planned"
          ? t("Actual Output Qty")
          : t("Production Qty")]: jo.productionQty ?? 0,
        [t("Assume Time Need")]: jo.assumeTimeNeedMins ?? 0,
        [t("Latest Start By")]: formatDateTime(jo.latestStartBy),
        [t("Start Time")]: formatDateTime(jo.startTime),
        [t("Assume End Time")]: formatDateTime(jo.assumeEndTime),
        [t("Actual End Time")]: formatDateTime(jo.actualEndTime),
        [t("Process operators")]: jo.processOperators ?? "",
        [t("Process handlers")]: jo.processHandlers ?? "",
        [t("QC users")]: jo.qcUsers ?? "",
        [t("Put away users")]: jo.putAwayUsers ?? "",
      });

      for (const step of jo.processSteps ?? []) {
        stepRows.push({
          [t("Export meta: exported at")]: exportedAt,
          [t("Drink detail mode label")]: viewLabel,
          [t("Date")]: selectedDate,
          [t("Item Code")]: step.itemCode ?? item.itemCode ?? "",
          [t("Goods Name")]: step.itemName ?? item.itemName ?? "",
          [t("Job Order Code")]: step.jobOrderCode ?? jo.jobOrderCode ?? "",
          [t("Process seq")]: step.seqNo ?? "",
          [t("Process Name")]: step.processName ?? "",
          [t("Operator Name & No.")]: step.operatorName ?? "",
          [t("Handler")]: step.handlerName ?? "",
          [t("Start Time")]: formatDateTime(step.startTime),
          [t("End Time")]: formatDateTime(step.endTime),
          [t("Status")]: step.status ?? "",
        });
      }
    }
  }

  const itemRows = data.map((item) => ({
    [t("Export meta: exported at")]: exportedAt,
    [t("Drink detail mode label")]: viewLabel,
    [t("Date")]: selectedDate,
    [t("Item Code")]: item.itemCode ?? "",
    [t("Goods Name")]: item.itemName ?? "",
    [t("Unit")]: item.uom ?? "",
    [viewMode === "planned"
      ? t("Planned Output Qty")
      : t("Stock Req. Qty")]: item.totalReqQty ?? 0,
    [viewMode === "planned"
      ? t("Actual Output Qty")
      : t("Production Qty")]: item.totalQty ?? 0,
    [t("JO count")]: filterJos(item.jobOrders ?? []).length,
  }));

  const modeSlug = viewMode === "planned" ? "planned" : "actual";
  const filename = `DrinkProductionQty_${modeSlug}_${selectedDate}_${dayjs().format("HHmm")}`;

  exportMultiSheetToXlsx(
    [
      { name: t("Excel sheet: JO detail"), rows: joRows },
      { name: t("Excel sheet: process people"), rows: stepRows },
      { name: t("Excel sheet: item summary"), rows: itemRows },
    ],
    filename,
  );
}