/**
 * Discounts Page
 * Manage discount coupons for trips
 */

import React, { useState, useMemo } from "react";
import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
import {
  Plus,
  ArrowUpDown,
  ArrowUp,
  ArrowDown,
  Edit,
  Trash2,
  Copy,
  ClipboardCopy,
  Tag,
  Users,
  Lock,
} from "lucide-react";
import { PremiumUpgradeDialog } from "../components/modules/PremiumUpgradeDialog";
import {
  Pagination,
  SearchFilterToolbar,
  BulkActionToolbar,
  Table as SharedTable,
} from "../components/shared";
import { __ } from "../lib/i18n";
import { toDateValue } from "../lib/dateFormat";
import { usePermissions } from "../hooks/usePermissions";
import { useToast } from "../components/ui/toast";
import { apiClient } from "../lib/api-client";
import { getErrorContext } from "../lib/errors";
import { Button } from "../components/ui/button";
import { Select } from "../components/ui/select";
import { PageHeader } from "../components/common/PageHeader";
import { Card, CardContent } from "../components/ui/card";
import { ConditionalRender } from "../components/ui/conditional-render";
import { Badge } from "../components/ui/badge";
import { ConfirmationDialog } from "../components/ui/confirmation-dialog";
import { Modal } from "../components/ui/modal";
import { formatYatraMoney } from "../lib/currency-display";

interface GroupDiscountRange {
  id: string;
  min_group_size: string;
  max_group_size: string;
  discount_type: "percentage" | "fixed";
  discount_amount: string;
}

interface CategoryDiscount {
  traveler_category_id: string;
  traveler_category_label: string;
  ranges: GroupDiscountRange[];
}

interface Discount {
  id: number;
  code: string;
  description?: string;
  type: "percentage" | "fixed";
  amount: number;
  max_discount_amount?: number;
  usage_limit: number;
  usage_limit_per_customer?: number;
  usage_count: number;
  valid_from?: string;
  expiry_date?: string;
  status: "publish" | "draft" | "trash" | "expired";
  applicable_to: "all" | "specific_trips";
  trip_ids?: number[];
  min_amount?: number;
  first_time_customer_only?: boolean;
  is_group_discount?: boolean;
  discount_mode?: "promo" | "group" | "both"; // Type of discount
  min_group_size?: number;
  group_discount_type?: "percentage" | "fixed";
  group_discount_amount?: number;
  group_discount_mode?: "total" | "category_based";
  group_discount_ranges?: GroupDiscountRange[];
  category_discounts?: CategoryDiscount[];
  created_at: string;
  updated_at: string;
  created_by: number; // user_id
  updated_by: number; // user_id
  created_by_name?: string; // Optional: user name from API
  updated_by_name?: string; // Optional: user name from API
}

const Discounts: React.FC = () => {
  const [searchTerm, setSearchTerm] = useState("");
  const [statusFilter, setStatusFilter] = useState("all");
  const [typeFilter, setTypeFilter] = useState("all");
  const [sortBy, setSortBy] = useState("created_at");
  const [sortOrder, setSortOrder] = useState<"asc" | "desc">("desc");
  const [page, setPage] = useState(1);
  const [deleteConfirm, setDeleteConfirm] = useState<{
    isOpen: boolean;
    discount: Discount | null;
  }>({ isOpen: false, discount: null });
  const [selectedIds, setSelectedIds] = useState<(string | number)[]>([]);
  const [bulkAction, setBulkAction] = useState("");
  const [showColumnsDropdown, setShowColumnsDropdown] = useState(false);
  const [isBulkPending, setIsBulkPending] = useState(false);
  const [showDiscountTypeModal, setShowDiscountTypeModal] = useState(false);
  const [premiumDialog, setPremiumDialog] = useState<{
    open: boolean;
    type: "group" | "both" | null;
  }>({ open: false, type: null });
  const [visibleColumns, setVisibleColumns] = useState(() => {
    if (typeof window === "undefined") {
      return {
        code: true,
        type: true,
        discount: true,
        usage: true,
        expiry_date: true,
        status: true,
      };
    }
    const saved = window.localStorage.getItem(
      "yatra-discounts-visible-columns",
    );
    return saved
      ? JSON.parse(saved)
      : {
          code: true,
          type: true,
          discount: true,
          usage: true,
          expiry_date: true,
          status: true,
        };
  });
  const queryClient = useQueryClient();
  const { can } = usePermissions();
  const { showToast } = useToast();

  const invalidateDiscountQueries = () => {
    queryClient.invalidateQueries({ queryKey: ["discounts"] });
    queryClient.invalidateQueries({ queryKey: ["discounts-stats"] });
  };

  const baseAdminUrl = (window as any).yatraAdmin?.adminUrl || "";
  const adminCurrency = (window as any)?.yatraAdmin?.currency || "USD";

  // Build query params
  const queryParams = useMemo(() => {
    const params: Record<string, any> = {
      page,
      per_page: 10,
      orderby: sortBy,
      order: sortOrder,
    };

    if (searchTerm) {
      params.search = searchTerm;
    }

    if (statusFilter !== "all") {
      params.status = statusFilter;
    }

    if (typeFilter !== "all") {
      params.type = typeFilter;
    }

    return params;
  }, [searchTerm, statusFilter, typeFilter, sortBy, sortOrder, page]);

  // Fetch discounts from API
  const { data, isLoading, error, refetch } = useQuery({
    queryKey: ["discounts", queryParams],
    queryFn: async () => {
      // Check URL parameter for error simulation (for testing)
      const urlParams = new URLSearchParams(window.location.search);
      if (urlParams.get("simulate_error") === "true") {
        throw new Error(
          "Simulated API error for testing error UI functionality",
        );
      }

      const response = await apiClient.get("/discounts", {
        params: queryParams,
      });
      return response;
    },
    enabled: can("yatra_manage_discounts"),
  });

  const { data: discountStats } = useQuery({
    queryKey: ["discounts-stats"],
    queryFn: async () => {
      try {
        return await apiClient.get("/discounts/stats");
      } catch {
        return {
          all: 0,
          publish: 0,
          draft: 0,
          trash: 0,
          expired: 0,
        };
      }
    },
    enabled: can("yatra_manage_discounts"),
  });

  const discountStatusCounts = useMemo(() => {
    const d = discountStats as Record<string, unknown> | null | undefined;
    if (!d) {
      return { all: 0, publish: 0, draft: 0, trash: 0, expired: 0 };
    }
    return {
      all: Number(d.all ?? 0),
      publish: Number(d.publish ?? 0),
      draft: Number(d.draft ?? 0),
      trash: Number(d.trash ?? 0),
      expired: Number(d.expired ?? 0),
    };
  }, [discountStats]);

  const bulkToolbarStatusOptions = useMemo(
    () => [
      {
        key: "all",
        label: __("All", "yatra"),
        count: discountStatusCounts.all,
      },
      {
        key: "publish",
        label: __("Publish", "yatra"),
        count: discountStatusCounts.publish,
      },
      {
        key: "draft",
        label: __("Draft", "yatra"),
        count: discountStatusCounts.draft,
      },
      {
        key: "trash",
        label: __("Trash", "yatra"),
        count: discountStatusCounts.trash,
      },
      {
        key: "expired",
        label: __("Expired", "yatra"),
        count: discountStatusCounts.expired,
      },
    ],
    [discountStatusCounts],
  );

  // Delete mutation
  const deleteMutation = useMutation({
    mutationFn: async (id: number) => {
      return await apiClient.delete(`/discounts/${id}`);
    },
    onSuccess: () => {
      invalidateDiscountQueries();
      showToast(__("Discount deleted successfully", "yatra"), "success");
      setDeleteConfirm({ isOpen: false, discount: null });
    },
    onError: (error: any) => {
      showToast(
        error?.message || __("Failed to delete discount", "yatra"),
        "error",
      );
    },
  });

  const discounts = data?.data || [];
  const total = data?.total || 0;
  const itemsPerPage = 10;
  const totalPages = Math.ceil(total / itemsPerPage);

  // Enhanced error handling
  const errorContext = getErrorContext(error);
  const apiErrorMessage = (data as any)?.error || (data as any)?.message;
  const derivedErrorDetails =
    errorContext.details ||
    (apiErrorMessage ? String(apiErrorMessage) : undefined) ||
    (error ? String(error?.message || error) : undefined);
  const isDiscountsError = !!error || !!apiErrorMessage;

  const formatDate = (dateString: string) => {
    if (!dateString) return __("N/A", "yatra");
    try {
      // toDateValue: a date-only expiry_date must not roll back a day in behind-UTC zones.
      const date = toDateValue(dateString);
      return date.toLocaleDateString("en-US", {
        month: "short",
        day: "numeric",
        year: "numeric",
        hour: "2-digit",
        minute: "2-digit",
      });
    } catch (e) {
      return __("Invalid date", "yatra");
    }
  };

  const confirmDelete = () => {
    if (deleteConfirm.discount) {
      deleteMutation.mutate(deleteConfirm.discount.id);
    }
  };

  const getStatusBadge = (status: string) => {
    const statusMap: Record<string, { className: string; label: string }> = {
      publish: {
        className:
          "bg-green-100 text-green-700 dark:bg-green-900/20 dark:text-green-400",
        label: __("Publish", "yatra"),
      },
      active: {
        className:
          "bg-green-100 text-green-700 dark:bg-green-900/20 dark:text-green-400",
        label: __("Publish", "yatra"),
      },
      draft: {
        className:
          "bg-gray-100 text-gray-700 dark:bg-gray-700 dark:text-gray-400",
        label: __("Draft", "yatra"),
      },
      trash: {
        className:
          "bg-red-100 text-red-700 dark:bg-red-900/20 dark:text-red-400",
        label: __("Trash", "yatra"),
      },
      expired: {
        className:
          "bg-orange-100 text-orange-700 dark:bg-orange-900/20 dark:text-orange-400",
        label: __("Expired", "yatra"),
      },
    };

    const statusInfo = statusMap[status] || {
      className:
        "bg-gray-100 text-gray-700 dark:bg-gray-700 dark:text-gray-400",
      label: status,
    };

    return (
      <span
        className={`inline-flex items-center px-2 py-1 rounded-md text-xs font-medium ${statusInfo.className}`}
      >
        {statusInfo.label}
      </span>
    );
  };

  const handleEdit = (discount: Discount) => {
    window.location.href = `${baseAdminUrl}?page=yatra&subpage=discounts&action=edit&id=${discount.id}`;
  };

  const handleDelete = (discount: Discount) => {
    setDeleteConfirm({ isOpen: true, discount });
  };

  const handleDuplicate = (discount: Discount) => {
    window.location.href = `${baseAdminUrl}?page=yatra&subpage=discounts&action=create&duplicate=${discount.id}`;
  };

  const handleCreateDiscount = () => {
    setShowDiscountTypeModal(true);
  };

  // Check if Advanced Discount module is enabled (Pro plugin sets this flag via yatraAdmin)
  const isAdvancedDiscountEnabled = !!(window as any).yatraAdmin
    ?.advancedDiscountEnabled;

  const handleSelectDiscountType = (type: "promo" | "group" | "both") => {
    // Block group and both options if Advanced Discount module is not enabled - show premium dialog
    if ((type === "group" || type === "both") && !isAdvancedDiscountEnabled) {
      setPremiumDialog({ open: true, type });
      return;
    }
    setShowDiscountTypeModal(false);
    window.location.href = `${baseAdminUrl}?page=yatra&subpage=discounts&action=create&discount_mode=${type}`;
  };

  // Get premium dialog content based on type
  const getPremiumDialogContent = () => {
    if (premiumDialog.type === "group") {
      return {
        name: __("Group Discount", "yatra"),
        description: __(
          "Create powerful group discounts that automatically apply when customers book for multiple travelers. Set tiered pricing based on group size, offer category-specific discounts, and boost your group bookings without requiring promo codes.",
          "yatra",
        ),
        purchaseUrl: "https://wpyatra.com/pricing?module=advanced-discount",
      };
    }
    return {
      name: __("Promo + Group Discount", "yatra"),
      description: __(
        "Combine the power of promo codes with automatic group discounts. Customers get a base discount with their promo code, plus additional savings when booking for groups. Perfect for maximizing conversions and encouraging larger bookings.",
        "yatra",
      ),
      purchaseUrl: "https://wpyatra.com/pricing?module=advanced-discount",
    };
  };

  const handleResetFilters = () => {
    setSearchTerm("");
    setStatusFilter("all");
    setTypeFilter("all");
    setSortBy("created_at");
    setSortOrder("desc");
    setPage(1);
  };

  const handleSort = (field: string) => {
    if (sortBy === field) {
      setSortOrder(sortOrder === "asc" ? "desc" : "asc");
    } else {
      setSortBy(field);
      setSortOrder("desc");
    }
  };

  const getSortIcon = (field: string) => {
    if (sortBy !== field) {
      return <ArrowUpDown className="w-3.5 h-3.5 ml-1 text-gray-400" />;
    }
    return sortOrder === "asc" ? (
      <ArrowUp className="w-3.5 h-3.5 ml-1 text-gray-600 dark:text-gray-300" />
    ) : (
      <ArrowDown className="w-3.5 h-3.5 ml-1 text-gray-600 dark:text-gray-300" />
    );
  };

  const hasFilters =
    searchTerm ||
    statusFilter !== "all" ||
    typeFilter !== "all" ||
    sortBy !== "created_at" ||
    sortOrder !== "desc";

  const toggleColumn = (columnKey: string) => {
    const newVisibleColumns = {
      ...visibleColumns,
      [columnKey]: !visibleColumns[columnKey as keyof typeof visibleColumns],
    };
    setVisibleColumns(newVisibleColumns);
    if (typeof window !== "undefined") {
      window.localStorage.setItem(
        "yatra-discounts-visible-columns",
        JSON.stringify(newVisibleColumns),
      );
    }
  };

  const handleSelectItem = (id: string | number, checked: boolean) => {
    setSelectedIds((prev) =>
      checked ? [...prev, id] : prev.filter((selectedId) => selectedId !== id),
    );
  };

  const handleSelectAll = (checked: boolean) => {
    if (checked) {
      setSelectedIds(discounts.map((discount: Discount) => discount.id));
    } else {
      setSelectedIds([]);
    }
  };

  const isAllSelected =
    discounts.length > 0 && selectedIds.length === discounts.length;

  const updateStatusForIds = async (
    ids: (string | number)[],
    newStatus: Discount["status"],
  ) => {
    await Promise.all(
      ids.map((id) => {
        const discount = discounts.find((item: Discount) => item.id === id);
        if (!discount) {
          return Promise.resolve();
        }

        const payload: Partial<Discount> = {
          ...discount,
          status: newStatus,
        };

        return apiClient.put(`/discounts/${id}`, payload);
      }),
    );
  };

  const handleBulkApply = async () => {
    if (!bulkAction || selectedIds.length === 0) {
      return;
    }

    try {
      setIsBulkPending(true);

      if (bulkAction === "delete") {
        await Promise.all(
          selectedIds.map((id) => apiClient.delete(`/discounts/${id}`)),
        );
        showToast(
          __("Selected discounts deleted successfully", "yatra"),
          "success",
        );
      } else {
        const newStatus = bulkAction as Discount["status"];
        await updateStatusForIds(selectedIds, newStatus);
        showToast(__("Bulk status updated successfully", "yatra"), "success");
      }

      invalidateDiscountQueries();
      setSelectedIds([]);
      setBulkAction("");
    } catch (error: any) {
      showToast(
        error?.message ||
          __("Failed to perform bulk action on discounts", "yatra"),
        "error",
      );
    } finally {
      setIsBulkPending(false);
    }
  };

  const allBulkActionOptions = [
    { value: "publish", label: __("Mark as Publish", "yatra") },
    { value: "draft", label: __("Mark as Draft", "yatra") },
    { value: "trash", label: __("Move to Trash", "yatra") },
    { value: "expired", label: __("Mark as Expired", "yatra") },
    { value: "delete", label: __("Delete permanently", "yatra") },
  ];

  const getBulkActionOptionsForStatus = (view: string) => {
    switch (view) {
      case "publish":
        return allBulkActionOptions.filter((opt) =>
          ["draft", "trash", "expired", "delete"].includes(opt.value),
        );
      case "draft":
        return allBulkActionOptions.filter((opt) =>
          ["publish", "trash", "expired", "delete"].includes(opt.value),
        );
      case "trash":
        return allBulkActionOptions.filter((opt) =>
          ["publish", "draft", "delete"].includes(opt.value),
        );
      case "expired":
        return allBulkActionOptions.filter((opt) =>
          ["publish", "draft", "trash", "delete"].includes(opt.value),
        );
      default:
        // "all" view: allow all actions
        return allBulkActionOptions;
    }
  };

  const bulkActionOptions = getBulkActionOptionsForStatus(statusFilter);

  const copyPromoCodeToClipboard = async (code: string) => {
    const text = code.trim();
    if (!text) {
      return;
    }
    try {
      await navigator.clipboard.writeText(text);
      showToast(__("Coupon code copied to clipboard", "yatra"), "success");
    } catch {
      try {
        const ta = document.createElement("textarea");
        ta.value = text;
        ta.setAttribute("readonly", "");
        ta.style.position = "fixed";
        ta.style.left = "-9999px";
        document.body.appendChild(ta);
        ta.select();
        document.execCommand("copy");
        document.body.removeChild(ta);
        showToast(__("Coupon code copied to clipboard", "yatra"), "success");
      } catch {
        showToast(__("Could not copy to clipboard", "yatra"), "error");
      }
    }
  };

  const statusOptions = [
    { value: "all", label: __("All Status", "yatra") },
    { value: "publish", label: __("Publish", "yatra") },
    { value: "draft", label: __("Draft", "yatra") },
    { value: "trash", label: __("Trash", "yatra") },
    { value: "expired", label: __("Expired", "yatra") },
  ];

  const sortOptions = [
    { value: "created_at", label: __("Created Date", "yatra") },
    { value: "code", label: __("Code", "yatra") },
    { value: "type", label: __("Type", "yatra") },
    { value: "amount", label: __("Amount", "yatra") },
    { value: "usage_count", label: __("Usage", "yatra") },
    { value: "expiry_date", label: __("Expiry Date", "yatra") },
    { value: "status", label: __("Status", "yatra") },
  ];

  const columnOptions = [
    {
      key: "code",
      label: __("Coupon Code", "yatra"),
      visible: visibleColumns.code,
    },
    {
      key: "type",
      label: __("Type", "yatra"),
      visible: visibleColumns.type,
    },
    {
      key: "discount",
      label: __("Discount", "yatra"),
      visible: visibleColumns.discount,
    },
    {
      key: "usage",
      label: __("Usage", "yatra"),
      visible: visibleColumns.usage,
    },
    {
      key: "expiry_date",
      label: __("Expiry Date", "yatra"),
      visible: visibleColumns.expiry_date,
    },
    {
      key: "status",
      label: __("Status", "yatra"),
      visible: visibleColumns.status,
    },
  ];

  const columns = [
    {
      key: "code",
      label: __("Name / Code", "yatra"),
      sortable: true,
      visible: visibleColumns.code,
      width: "w-[280px]",
      render: (discount: Discount) => (
        <div>
          <div className="flex items-center gap-2 mb-1 flex-wrap">
            {/* Discount Mode Badge */}
            {discount.discount_mode === "group" ? (
              <Badge
                variant="success"
                className="text-xs flex items-center gap-1"
              >
                <Users className="w-3 h-3" />
                {__("Group Only", "yatra")}
              </Badge>
            ) : discount.discount_mode === "promo" ? (
              <Badge variant="info" className="text-xs flex items-center gap-1">
                <Tag className="w-3 h-3" />
                {__("Promo Code", "yatra")}
              </Badge>
            ) : discount.is_group_discount ? (
              <Badge
                variant="warning"
                className="text-xs flex items-center gap-1"
              >
                <Tag className="w-3 h-3" />
                <Users className="w-3 h-3" />
                {__("Promo + Group", "yatra")}
              </Badge>
            ) : (
              <Badge variant="info" className="text-xs flex items-center gap-1">
                <Tag className="w-3 h-3" />
                {__("Promo Code", "yatra")}
              </Badge>
            )}
          </div>
          <div className="flex items-center gap-1.5 mt-1 flex-wrap">
            <a
              href={`${baseAdminUrl}?page=yatra&subpage=discounts&action=edit&id=${discount.id}`}
              className="font-medium font-mono text-sm text-blue-600 dark:text-blue-400 hover:underline underline-offset-2"
            >
              {discount.code}
            </a>
            {discount.discount_mode !== "group" && discount.code?.trim() ? (
              <button
                type="button"
                className="inline-flex h-8 w-8 shrink-0 cursor-pointer items-center justify-center rounded-md border border-gray-300 bg-white text-gray-800 shadow-sm transition-colors hover:border-gray-400 hover:bg-gray-50 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-500 focus-visible:ring-offset-2 dark:border-gray-500 dark:bg-gray-800 dark:text-gray-100 dark:hover:border-gray-400 dark:hover:bg-gray-700"
                title={__("Copy coupon code", "yatra")}
                aria-label={__("Copy coupon code", "yatra")}
                onClick={(e) => {
                  e.preventDefault();
                  e.stopPropagation();
                  void copyPromoCodeToClipboard(discount.code);
                }}
              >
                <ClipboardCopy
                  className="pointer-events-none h-4 w-4"
                  strokeWidth={2.25}
                  aria-hidden
                />
              </button>
            ) : null}
          </div>
          {discount.description && (
            <div className="text-xs text-gray-500 dark:text-gray-400 mt-1">
              {discount.description}
            </div>
          )}
        </div>
      ),
    },
    {
      key: "type",
      label: __("Discount", "yatra"),
      sortable: true,
      visible: visibleColumns.type,
      render: (discount: Discount) => (
        <div className="space-y-1.5">
          {/* Base discount - only show if not group-only */}
          {discount.discount_mode !== "group" && (
            <div className="flex items-center gap-1">
              <span className="font-medium text-gray-900 dark:text-white">
                {discount.type === "percentage"
                  ? `${discount.amount}%`
                  : formatYatraMoney(
                      Number(discount.amount) || 0,
                      adminCurrency,
                      {
                        zeroAsUnknown: false,
                      },
                    )}
              </span>
              <span className="text-xs text-gray-500">
                {__("off", "yatra")}
              </span>
            </div>
          )}
          {/* Group discount info */}
          {discount.is_group_discount && (
            <div className="space-y-1">
              {/* Category-based discounts */}
              {discount.group_discount_mode === "category_based" &&
              discount.category_discounts &&
              discount.category_discounts.length > 0 ? (
                <div className="space-y-1">
                  {discount.category_discounts.map((cat, idx) => (
                    <div key={idx} className="text-xs">
                      <span className="font-medium text-gray-700 dark:text-gray-300">
                        {cat.traveler_category_label}:
                      </span>
                      <span className="ml-1 text-green-600 dark:text-green-400">
                        {cat.ranges && cat.ranges.length > 0
                          ? cat.ranges.map((range, rIdx) => (
                              <span key={rIdx}>
                                {rIdx > 0 && ", "}
                                {range.min_group_size}
                                {range.max_group_size
                                  ? `-${range.max_group_size}`
                                  : "+"}
                                :
                                {range.discount_type === "percentage"
                                  ? `${range.discount_amount}%`
                                  : formatYatraMoney(
                                      Number(range.discount_amount) || 0,
                                      adminCurrency,
                                      { zeroAsUnknown: false },
                                    )}
                              </span>
                            ))
                          : "-"}
                      </span>
                    </div>
                  ))}
                </div>
              ) : discount.group_discount_ranges &&
                discount.group_discount_ranges.length > 0 ? (
                /* Total-based group discount ranges */
                <div className="space-y-0.5">
                  {discount.group_discount_ranges.map((range, idx) => (
                    <div
                      key={idx}
                      className="text-xs text-green-600 dark:text-green-400 flex items-center gap-1"
                    >
                      <Users className="w-3 h-3" />
                      <span>
                        {range.min_group_size}
                        {range.max_group_size
                          ? `-${range.max_group_size}`
                          : "+"}{" "}
                        {__("pax", "yatra")}:
                        {range.discount_type === "percentage"
                          ? ` ${range.discount_amount}%`
                          : ` ${formatYatraMoney(
                              Number(range.discount_amount) || 0,
                              adminCurrency,
                              { zeroAsUnknown: false },
                            )}`}{" "}
                        {__("off", "yatra")}
                      </span>
                    </div>
                  ))}
                </div>
              ) : (
                /* Fallback for legacy data */
                <div className="text-xs text-green-600 dark:text-green-400 flex items-center gap-1">
                  <Users className="w-3 h-3" />
                  {discount.min_group_size
                    ? `${discount.min_group_size}+ ${__("travelers", "yatra")}: ${discount.group_discount_type === "percentage" ? `${discount.group_discount_amount}%` : formatYatraMoney(Number(discount.group_discount_amount) || 0, adminCurrency, { zeroAsUnknown: false })}`
                    : __("Group pricing", "yatra")}
                </div>
              )}
            </div>
          )}
        </div>
      ),
    },
    {
      key: "usage",
      label: __("Usage", "yatra"),
      sortable: true,
      visible: visibleColumns.usage,
      render: (discount: Discount) => (
        <div className="text-center">
          <Badge variant="outline" className="font-medium">
            {discount.usage_count} /{" "}
            {discount.usage_limit === 0 ? "∞" : discount.usage_limit}
          </Badge>
        </div>
      ),
    },
    {
      key: "expiry_date",
      label: __("Expiry Date", "yatra"),
      sortable: true,
      visible: visibleColumns.expiry_date,
      render: (discount: Discount) => (
        <span className="text-gray-500 dark:text-gray-400 text-sm">
          {discount.expiry_date
            ? formatDate(discount.expiry_date)
            : __("No expiry", "yatra")}
        </span>
      ),
    },
    {
      key: "status",
      label: __("Status", "yatra"),
      sortable: true,
      visible: visibleColumns.status,
      render: (discount: Discount) => getStatusBadge(discount.status),
    },
  ];

  const actions = [
    {
      key: "duplicate",
      label: __("Duplicate", "yatra"),
      icon: <Copy className="w-4 h-4" />,
      onClick: (discount: Discount) => handleDuplicate(discount),
    },
    {
      key: "edit",
      label: __("Edit", "yatra"),
      icon: <Edit className="w-4 h-4" />,
      onClick: (discount: Discount) => handleEdit(discount),
    },
    {
      key: "mark_publish",
      label: __("Mark as Publish", "yatra"),
      icon: <ArrowUp className="w-4 h-4" />,
      onClick: async (discount: Discount) => {
        setIsBulkPending(true);
        try {
          await updateStatusForIds([discount.id], "publish");
          invalidateDiscountQueries();
          showToast(__("Discount status updated", "yatra"), "success");
        } catch (error: any) {
          showToast(
            error?.message || __("Failed to update discount status", "yatra"),
            "error",
          );
        } finally {
          setIsBulkPending(false);
        }
      },
      condition: (discount: Discount) => discount.status !== "publish",
    },
    {
      key: "mark_draft",
      label: __("Mark as Draft", "yatra"),
      icon: <ArrowDown className="w-4 h-4" />,
      onClick: async (discount: Discount) => {
        setIsBulkPending(true);
        try {
          await updateStatusForIds([discount.id], "draft");
          invalidateDiscountQueries();
          showToast(__("Discount status updated", "yatra"), "success");
        } catch (error: any) {
          showToast(
            error?.message || __("Failed to update discount status", "yatra"),
            "error",
          );
        } finally {
          setIsBulkPending(false);
        }
      },
      condition: (discount: Discount) => discount.status !== "draft",
    },
    {
      key: "move_trash",
      label: __("Move to Trash", "yatra"),
      icon: <Trash2 className="w-4 h-4" />,
      onClick: async (discount: Discount) => {
        setIsBulkPending(true);
        try {
          await updateStatusForIds([discount.id], "trash");
          invalidateDiscountQueries();
          showToast(__("Discount moved to trash", "yatra"), "success");
        } catch (error: any) {
          showToast(
            error?.message || __("Failed to move discount to trash", "yatra"),
            "error",
          );
        } finally {
          setIsBulkPending(false);
        }
      },
      condition: (discount: Discount) => discount.status !== "trash",
    },
    {
      key: "mark_expired",
      label: __("Mark as Expired", "yatra"),
      icon: <ArrowDown className="w-4 h-4" />,
      onClick: async (discount: Discount) => {
        setIsBulkPending(true);
        try {
          await updateStatusForIds([discount.id], "expired");
          invalidateDiscountQueries();
          showToast(__("Discount status updated", "yatra"), "success");
        } catch (error: any) {
          showToast(
            error?.message || __("Failed to update discount status", "yatra"),
            "error",
          );
        } finally {
          setIsBulkPending(false);
        }
      },
      condition: (discount: Discount) => discount.status !== "expired",
    },
    {
      key: "delete",
      label: __("Delete", "yatra"),
      icon: <Trash2 className="w-4 h-4" />,
      onClick: (discount: Discount) => handleDelete(discount),
      variant: "destructive" as const,
    },
  ];

  return (
    <div className="space-y-3">
      {/* Discount Type Selection Modal */}
      <Modal
        isOpen={showDiscountTypeModal}
        onClose={() => setShowDiscountTypeModal(false)}
        title={__("What type of discount do you want to create?", "yatra")}
        description={__(
          "Choose the discount type that best fits your needs",
          "yatra",
        )}
        size="lg"
        footer={
          <div className="flex justify-end">
            <Button
              variant="outline"
              onClick={() => setShowDiscountTypeModal(false)}
            >
              {__("Cancel", "yatra")}
            </Button>
          </div>
        }
      >
        <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
          {/* Promo Code Option */}
          <button
            onClick={() => handleSelectDiscountType("promo")}
            className="flex flex-col items-center p-6 border-2 border-gray-200 dark:border-gray-600 rounded-xl hover:border-blue-500 hover:bg-blue-50 dark:hover:bg-blue-900/20 transition-all group text-left"
          >
            <div className="w-14 h-14 bg-blue-100 dark:bg-blue-900/50 rounded-full flex items-center justify-center mb-4 group-hover:bg-blue-200 dark:group-hover:bg-blue-800 transition-colors">
              <Tag className="w-7 h-7 text-blue-600 dark:text-blue-400" />
            </div>
            <h3 className="font-semibold text-gray-900 dark:text-white mb-2">
              {__("Promo Code", "yatra")}
            </h3>
            <p className="text-xs text-gray-500 dark:text-gray-400 text-center">
              {__(
                "Customer enters a code to get a percentage or fixed discount",
                "yatra",
              )}
            </p>
          </button>

          {/* Group Discount Option */}
          <button
            onClick={() => handleSelectDiscountType("group")}
            className="relative flex flex-col items-center p-6 border-2 border-gray-200 dark:border-gray-600 rounded-xl hover:border-green-500 hover:bg-green-50 dark:hover:bg-green-900/20 transition-all group text-left"
          >
            {!isAdvancedDiscountEnabled && (
              <div
                className="absolute top-2 right-2 z-10 flex items-center gap-1 px-2 py-1 text-[10px] font-semibold rounded-full shadow-md"
                style={{
                  background: "linear-gradient(to right, #f59e0b, #f97316)",
                  color: "#ffffff",
                  border: "1px solid #fbbf24",
                }}
              >
                <Lock className="w-3 h-3" style={{ color: "#ffffff" }} />
                <span style={{ color: "#ffffff" }}>{__("Pro", "yatra")}</span>
              </div>
            )}
            <div className="w-14 h-14 bg-green-100 dark:bg-green-900/50 rounded-full flex items-center justify-center mb-4 group-hover:bg-green-200 dark:group-hover:bg-green-800 transition-colors">
              <Users className="w-7 h-7 text-green-600 dark:text-green-400" />
            </div>
            <h3 className="font-semibold text-gray-900 dark:text-white mb-2">
              {__("Group Discount", "yatra")}
            </h3>
            <p className="text-xs text-gray-500 dark:text-gray-400 text-center">
              {__(
                "Auto-applies when booking multiple travelers. No code needed.",
                "yatra",
              )}
            </p>
          </button>

          {/* Both Option */}
          <button
            onClick={() => handleSelectDiscountType("both")}
            className="relative flex flex-col items-center p-6 border-2 border-gray-200 dark:border-gray-600 rounded-xl hover:border-purple-500 hover:bg-purple-50 dark:hover:bg-purple-900/20 transition-all group text-left"
          >
            {!isAdvancedDiscountEnabled && (
              <div
                className="absolute top-2 right-2 z-10 flex items-center gap-1 px-2 py-1 text-[10px] font-semibold rounded-full shadow-md"
                style={{
                  background: "linear-gradient(to right, #f59e0b, #f97316)",
                  color: "#ffffff",
                  border: "1px solid #fbbf24",
                }}
              >
                <Lock className="w-3 h-3" style={{ color: "#ffffff" }} />
                <span style={{ color: "#ffffff" }}>{__("Pro", "yatra")}</span>
              </div>
            )}
            <div className="w-14 h-14 bg-purple-100 dark:bg-purple-900/50 rounded-full flex items-center justify-center mb-4 group-hover:bg-purple-200 dark:group-hover:bg-purple-800 transition-colors">
              <div className="flex -space-x-1">
                <Tag className="w-5 h-5 text-purple-600 dark:text-purple-400" />
                <Users className="w-5 h-5 text-purple-600 dark:text-purple-400" />
              </div>
            </div>
            <h3 className="font-semibold text-gray-900 dark:text-white mb-2">
              {__("Promo + Group", "yatra")}
            </h3>
            <p className="text-xs text-gray-500 dark:text-gray-400 text-center">
              {__(
                "Promo code gives base discount + extra savings for groups",
                "yatra",
              )}
            </p>
          </button>
        </div>
      </Modal>

      <ConfirmationDialog
        isOpen={deleteConfirm.isOpen}
        onClose={() => setDeleteConfirm({ isOpen: false, discount: null })}
        onConfirm={confirmDelete}
        title={__("Delete Discount", "yatra")}
        message={
          deleteConfirm.discount
            ? __(
                'Are you sure you want to delete discount code "{code}"? This action cannot be undone.',
                "yatra",
              ).replace("{code}", deleteConfirm.discount.code)
            : __(
                "Are you sure you want to delete this discount? This action cannot be undone.",
                "yatra",
              )
        }
        confirmText={__("Delete", "yatra")}
        cancelText={__("Cancel", "yatra")}
        variant="danger"
        isLoading={deleteMutation.isPending}
      />

      {/* Premium Upgrade Dialog for Group Discount features */}
      <PremiumUpgradeDialog
        open={premiumDialog.open}
        onClose={() => setPremiumDialog({ open: false, type: null })}
        moduleName={getPremiumDialogContent().name}
        moduleDescription={getPremiumDialogContent().description}
        purchaseUrl={getPremiumDialogContent().purchaseUrl}
      />

      <PageHeader
        title={__("Discounts", "yatra")}
        description={__(
          "Create and manage discount coupons for your trips",
          "yatra",
        )}
        actionCapability="yatra_manage_discounts"
        actions={
          <Button
            onClick={handleCreateDiscount}
            className="flex items-center gap-2"
          >
            <Plus className="w-4 h-4" />
            {__("Create Discount", "yatra")}
          </Button>
        }
      />

      <Card>
        <CardContent className="p-3">
          <div className="flex flex-col lg:flex-row lg:items-center lg:justify-between gap-2">
            <div className="flex-1 min-w-0">
              <SearchFilterToolbar
                searchTerm={searchTerm}
                onSearchChange={setSearchTerm}
                statusFilter={statusFilter}
                onStatusChange={(value) => {
                  setStatusFilter(value);
                  setPage(1);
                }}
                statusOptions={statusOptions}
                sortBy={sortBy}
                onSortByChange={(field) => {
                  setSortBy(field);
                  setPage(1);
                }}
                sortOrder={sortOrder}
                onSortOrderChange={(order) => {
                  setSortOrder(order);
                  setPage(1);
                }}
                sortOptions={sortOptions}
                onResetFilters={handleResetFilters}
                hasFilters={!!hasFilters}
                placeholder={__("Search by code...", "yatra")}
              />
            </div>

            <div className="w-full lg:w-auto flex lg:justify-end">
              <Select
                value={typeFilter}
                onChange={(e) => {
                  setTypeFilter(e.target.value);
                  setPage(1);
                }}
                className="w-full lg:w-48 max-w-xs"
              >
                <option value="all">{__("All Types", "yatra")}</option>
                <option value="percentage">{__("Percentage", "yatra")}</option>
                <option value="fixed">{__("Fixed Amount", "yatra")}</option>
              </Select>
            </div>
          </div>
        </CardContent>
      </Card>

      <ConditionalRender capability="yatra_manage_discounts">
        <>
          <BulkActionToolbar
            selectedIds={selectedIds}
            bulkAction={bulkAction}
            setBulkAction={setBulkAction}
            onApply={handleBulkApply}
            onClearSelection={() => setSelectedIds([])}
            statusFilter={statusFilter}
            setStatusFilter={(value) => {
              setStatusFilter(value);
              setPage(1);
            }}
            statusOptions={bulkToolbarStatusOptions}
            showColumnsDropdown={showColumnsDropdown}
            setShowColumnsDropdown={setShowColumnsDropdown}
            columnOptions={columnOptions}
            onToggleColumn={toggleColumn}
            bulkMutationPending={isBulkPending}
            totalItems={total}
            bulkActionOptions={bulkActionOptions}
          />

          <Card>
            <CardContent className="p-0">
              <SharedTable
                data={discounts}
                columns={columns}
                actions={actions}
                isLoading={isLoading}
                isError={isDiscountsError}
                errorText={__("Error loading discounts", "yatra")}
                errorDescription={__(
                  "We couldn't connect to the discounts service. Please refresh or try again shortly.",
                  "We couldn't connect to the discounts service. Please refresh or try again shortly.",
                )}
                errorDetails={derivedErrorDetails}
                errorRequestInfo={errorContext.requestInfo}
                onRetry={() => refetch()}
                emptyText={__("No discounts found", "yatra")}
                emptyDescription={
                  hasFilters
                    ? __(
                        "Try adjusting your filters to see more results.",
                        "yatra",
                      )
                    : __(
                        "Get started by creating your first discount coupon.",
                        "yatra",
                      )
                }
                onCreateClick={
                  can("yatra_manage_discounts")
                    ? handleCreateDiscount
                    : undefined
                }
                onSort={handleSort}
                getSortIcon={getSortIcon}
                selectedItemIds={selectedIds}
                onSelectItem={handleSelectItem}
                onSelectAll={handleSelectAll}
                isAllSelected={isAllSelected}
                getItemId={(discount: Discount) => discount.id}
                skeletonRows={5}
                capability="yatra_manage_discounts"
              />
            </CardContent>
          </Card>

          {total > 0 && (
            <div className="mt-4">
              <Pagination
                currentPage={page}
                totalPages={totalPages}
                totalItems={total}
                itemsPerPage={itemsPerPage}
                onPageChange={(newPage) => setPage(newPage)}
                itemName={__("coupons", "yatra")}
              />
            </div>
          )}
        </>
      </ConditionalRender>
    </div>
  );
};
export default Discounts;
