import { useQuery } from "@tanstack/react-query";
import {
  Avatar,
  AvatarFallback,
  AvatarImage,
} from "@workspace/ui/components/avatar";
import { Badge } from "@workspace/ui/components/badge";
import {
  Sheet,
  SheetContent,
  SheetHeader,
  SheetTitle,
} from "@workspace/ui/components/sheet";
import { Skeleton } from "@workspace/ui/components/skeleton";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@workspace/ui/components/table";
import {
  getAdminUserInviteList,
  getAdminUserInviteStats,
} from "@workspace/ui/services/admin/user";
import { useState } from "react";
import { useTranslation } from "react-i18next";
import { Display } from "@/components/display";
import { formatDate } from "@/utils/common";

interface UserInviteStatsSheetProps {
  userId: number;
  open: boolean;
  onOpenChange: (open: boolean) => void;
}

export function UserInviteStatsSheet({
  userId,
  open,
  onOpenChange,
}: UserInviteStatsSheetProps) {
  const { t } = useTranslation("user");
  const [page, setPage] = useState(1);
  const pageSize = 200;

  const { data: stats, isLoading: statsLoading } = useQuery({
    queryKey: ["adminUserInviteStats", userId],
    queryFn: async () => {
      const { data } = await getAdminUserInviteStats({ user_id: userId });
      return data.data;
    },
    enabled: open && !!userId,
  });

  const { data: listResult, isLoading: listLoading } = useQuery({
    queryKey: ["adminUserInviteList", userId, page],
    queryFn: async () => {
      const { data } = await getAdminUserInviteList({
        user_id: userId,
        page,
        size: pageSize,
      });
      return data.data;
    },
    enabled: open && !!userId,
  });

  const inviteList = listResult?.list ?? [];
  const total = listResult?.total ?? 0;
  const totalPages = Math.ceil(total / pageSize);

  return (
    <Sheet onOpenChange={onOpenChange} open={open}>
      <SheetContent className="w-[560px] overflow-y-auto sm:max-w-[560px]">
        <SheetHeader>
          <SheetTitle>{t("inviteStats", "Invite Statistics")}</SheetTitle>
        </SheetHeader>

        {/* 概览卡片 */}
        <div className="mt-4 grid grid-cols-2 gap-3">
          <StatCard
            label={t("inviteCount", "Invited Users")}
            loading={statsLoading}
          >
            <span className="font-semibold text-2xl">
              {stats?.invite_count ?? 0}
            </span>
          </StatCard>
          <StatCard
            label={t("totalCommission", "Total Commission")}
            loading={statsLoading}
          >
            <Display type="currency" value={stats?.total_commission} />
          </StatCard>
          <StatCard
            label={t("currentCommission", "Current Commission")}
            loading={statsLoading}
          >
            <Display type="currency" value={stats?.current_commission} />
          </StatCard>
          <StatCard
            label={t("referralPercentage", "Referral %")}
            loading={statsLoading}
          >
            <span className="font-semibold text-2xl">
              {stats?.referral_percentage
                ? `${stats.referral_percentage}%`
                : t("globalDefault", "Global Default")}
            </span>
            {stats?.only_first_purchase && (
              <span className="ml-1 text-muted-foreground text-xs">
                ({t("firstPurchaseOnly", "First purchase only")})
              </span>
            )}
          </StatCard>
        </div>

        {/* 邀请用户列表 */}
        <div className="mt-6">
          <h3 className="mb-3 font-medium text-sm">
            {t("invitedUsers", "Invited Users")} ({total})
          </h3>
          {listLoading ? (
            <div className="space-y-2">
              {Array.from({ length: 5 }).map((_, i) => (
                <Skeleton className="h-10 w-full" key={i} />
              ))}
            </div>
          ) : inviteList.length === 0 ? (
            <p className="py-8 text-center text-muted-foreground text-sm">
              {t("noInvitedUsers", "No invited users yet")}
            </p>
          ) : (
            <>
              <Table>
                <TableHeader>
                  <TableRow>
                    <TableHead>{t("user", "User")}</TableHead>
                    <TableHead>{t("status", "Status")}</TableHead>
                    <TableHead>{t("registeredAt", "Registered At")}</TableHead>
                  </TableRow>
                </TableHeader>
                <TableBody>
                  {inviteList.map((user) => (
                    <TableRow key={user.id}>
                      <TableCell>
                        <div className="flex items-center gap-2">
                          <Avatar className="h-7 w-7">
                            <AvatarImage src={user.avatar} />
                            <AvatarFallback className="text-xs">
                              {user.identifier?.charAt(0)?.toUpperCase() ?? "U"}
                            </AvatarFallback>
                          </Avatar>
                          <span className="max-w-[160px] truncate text-sm">
                            {user.identifier || `#${user.id}`}
                          </span>
                        </div>
                      </TableCell>
                      <TableCell>
                        <Badge variant={user.enable ? "default" : "secondary"}>
                          {user.enable
                            ? t("enabled", "Enabled")
                            : t("disabled", "Disabled")}
                        </Badge>
                      </TableCell>
                      <TableCell className="text-muted-foreground text-sm">
                        {formatDate(user.created_at)}
                      </TableCell>
                    </TableRow>
                  ))}
                </TableBody>
              </Table>

              {/* 分页 */}
              {totalPages > 1 && (
                <div className="mt-4 flex justify-center gap-2">
                  <button
                    className="rounded border px-3 py-1 text-sm disabled:opacity-40"
                    disabled={page <= 1}
                    onClick={() => setPage((p) => p - 1)}
                    type="button"
                  >
                    {t("prev", "Prev")}
                  </button>
                  <span className="px-3 py-1 text-sm">
                    {page} / {totalPages}
                  </span>
                  <button
                    className="rounded border px-3 py-1 text-sm disabled:opacity-40"
                    disabled={page >= totalPages}
                    onClick={() => setPage((p) => p + 1)}
                    type="button"
                  >
                    {t("next", "Next")}
                  </button>
                </div>
              )}
            </>
          )}
        </div>
      </SheetContent>
    </Sheet>
  );
}

function StatCard({
  label,
  loading,
  children,
}: {
  label: string;
  loading: boolean;
  children: React.ReactNode;
}) {
  return (
    <div className="space-y-1 rounded-lg border p-4">
      <p className="text-muted-foreground text-xs">{label}</p>
      {loading ? (
        <Skeleton className="h-8 w-24" />
      ) : (
        <div className="flex items-baseline gap-1 font-semibold text-2xl">
          {children}
        </div>
      )}
    </div>
  );
}