import { getSessionUser } from "@/lib/auth";
import { isKavenixAdminEmail } from "@/lib/kavenix-admin";
import {
  getKavenixStatistics,
  normalizeKavenixStatisticsRange,
} from "@/lib/kavenix-statistics";

export const runtime = "nodejs";
export const dynamic = "force-dynamic";

const NO_STORE_HEADERS = {
  "Cache-Control": "no-store, max-age=0",
};

export async function GET(request: Request) {
  const user = await getSessionUser();

  if (!user) {
    return Response.json(
      { error: "unauthorized", message: "로그인이 필요합니다." },
      { status: 401, headers: NO_STORE_HEADERS },
    );
  }

  if (!isKavenixAdminEmail(user.email)) {
    return Response.json(
      { error: "forbidden", message: "최고관리자만 조회할 수 있습니다." },
      { status: 403, headers: NO_STORE_HEADERS },
    );
  }

  const rangeDays = normalizeKavenixStatisticsRange(
    new URL(request.url).searchParams.get("range"),
  );

  try {
    const statistics = await getKavenixStatistics(rangeDays);
    return Response.json(
      { ok: true, statistics },
      { status: 200, headers: NO_STORE_HEADERS },
    );
  } catch (error) {
    console.error("Unable to load Kavenix statistics", error);
    return Response.json(
      { error: "statistics-load-failed", message: "운영 통계를 불러오지 못했습니다." },
      { status: 500, headers: NO_STORE_HEADERS },
    );
  }
}