import { NextResponse } from "next/server";
import type { DashboardMarketHubResponse } from "@/features/dashboard/types/dashboard.types";
import { hasKisConfig, normalizeTradingEnv } from "@/lib/kis/config";
import { getDomesticDashboardMarketHub } from "@/lib/kis/dashboard";
import { hasKisApiSession } from "@/app/api/kis/_session";
import {
  createKisApiErrorResponse,
  KIS_API_ERROR_CODE,
  toKisApiErrorMessage,
} from "@/app/api/kis/_response";
import { readKisCredentialsFromHeaders } from "@/app/api/kis/domestic/_shared";

/**
 * @file app/api/kis/domestic/market-hub/route.ts
 * @description 국내주식 시장 허브(급등/인기/뉴스) 조회 API
 */

/**
 * 대시보드 시장 허브 조회 API
 * @returns 급등주식/인기종목/주요뉴스 목록
 * @remarks UI 흐름: DashboardContainer -> useDashboardData -> /api/kis/domestic/market-hub -> MarketHubSection 렌더링
 */
export async function GET(request: Request) {
  const hasSession = await hasKisApiSession();
  if (!hasSession) {
    return createKisApiErrorResponse({
      status: 401,
      code: KIS_API_ERROR_CODE.AUTH_REQUIRED,
      message: "로그인이 필요합니다.",
    });
  }

  const credentials = readKisCredentialsFromHeaders(request.headers);
  if (!hasKisConfig(credentials)) {
    return createKisApiErrorResponse({
      status: 400,
      code: KIS_API_ERROR_CODE.CREDENTIAL_REQUIRED,
      message: "KIS API 키 설정이 필요합니다.",
    });
  }

  try {
    const result = await getDomesticDashboardMarketHub(credentials);
    const response: DashboardMarketHubResponse = {
      source: "kis",
      tradingEnv: normalizeTradingEnv(credentials.tradingEnv),
      gainers: result.gainers,
      losers: result.losers,
      popularByVolume: result.popularByVolume,
      popularByValue: result.popularByValue,
      news: result.news,
      pulse: result.pulse,
      warnings: result.warnings,
      fetchedAt: new Date().toISOString(),
    };

    return NextResponse.json(response, {
      headers: {
        "cache-control": "no-store",
      },
    });
  } catch (error) {
    return createKisApiErrorResponse({
      status: 500,
      code: KIS_API_ERROR_CODE.UPSTREAM_FAILURE,
      message: toKisApiErrorMessage(
        error,
        "시장 허브 조회 중 오류가 발생했습니다.",
      ),
    });
  }
}