import type { DashboardKisValidateResponse } from "@/features/trade/types/trade.types";
import { normalizeTradingEnv } from "@/lib/kis/config";
import {
  parseKisCredentialRequest,
  validateKisCredentialInput,
} from "@/lib/kis/request";
import { getKisAccessToken } from "@/lib/kis/token";
import { hasKisApiSession } from "@/app/api/kis/_session";
import { NextRequest, NextResponse } from "next/server";

/**
 * @file app/api/kis/validate/route.ts
 * @description 사용자 입력 KIS API 키를 검증합니다.
 */

/**
 * @description 액세스 토큰 발급 성공 여부로 API 키를 검증합니다.
 * @see features/settings/components/KisAuthForm.tsx
 */
export async function POST(request: NextRequest) {
  const credentials = await parseKisCredentialRequest(request);
  const tradingEnv = normalizeTradingEnv(credentials.tradingEnv);

  const hasSession = await hasKisApiSession();
  if (!hasSession) {
    return NextResponse.json(
      {
        ok: false,
        tradingEnv,
        message: "로그인이 필요합니다.",
      } satisfies DashboardKisValidateResponse,
      { status: 401 },
    );
  }

  const invalidMessage = validateKisCredentialInput(credentials);
  if (invalidMessage) {
    return NextResponse.json(
      {
        ok: false,
        tradingEnv,
        message: invalidMessage,
      } satisfies DashboardKisValidateResponse,
      { status: 400 },
    );
  }

  try {
    await getKisAccessToken(credentials);

    return NextResponse.json({
      ok: true,
      tradingEnv,
      message: "API 키 검증이 완료되었습니다. (토큰 발급 성공)",
    } satisfies DashboardKisValidateResponse);
  } catch (error) {
    const message =
      error instanceof Error
        ? error.message
        : "API 키 검증 중 오류가 발생했습니다.";

    return NextResponse.json(
      {
        ok: false,
        tradingEnv,
        message,
      } satisfies DashboardKisValidateResponse,
      { status: 401 },
    );
  }
}