import { NextResponse } from "next/server";
import type { DashboardIndicesResponse } from "@/features/dashboard/types/dashboard.types";
import { hasKisConfig, normalizeTradingEnv } from "@/lib/kis/config";
import { getDomesticDashboardIndices } from "@/lib/kis/dashboard";
import { hasKisApiSession } from "@/app/api/kis/_session";
import { readKisCredentialsFromHeaders } from "@/app/api/kis/domestic/_shared";

/**
 * @file app/api/kis/domestic/indices/route.ts
 * @description 국내 주요 지수(KOSPI/KOSDAQ) 조회 API
 */

/**
 * 대시보드 지수 조회 API
 * @returns 코스피/코스닥 지수 목록
 * @see features/dashboard/hooks/use-dashboard-data.ts 대시보드 초기 로드/주기 갱신에서 호출합니다.
 */
export async function GET(request: Request) {
  const hasSession = await hasKisApiSession();
  if (!hasSession) {
    return NextResponse.json({ error: "로그인이 필요합니다." }, { status: 401 });
  }

  const credentials = readKisCredentialsFromHeaders(request.headers);

  if (!hasKisConfig(credentials)) {
    return NextResponse.json(
      {
        error: "KIS API 키 설정이 필요합니다.",
      },
      { status: 400 },
    );
  }

  try {
    const items = await getDomesticDashboardIndices(credentials);
    const response: DashboardIndicesResponse = {
      source: "kis",
      tradingEnv: normalizeTradingEnv(credentials.tradingEnv),
      items,
      fetchedAt: new Date().toISOString(),
    };

    return NextResponse.json(response, {
      headers: {
        "cache-control": "no-store",
      },
    });
  } catch (error) {
    const message =
      error instanceof Error
        ? error.message
        : "지수 조회 중 오류가 발생했습니다.";
    return NextResponse.json({ error: message }, { status: 500 });
  }
}