import type { DashboardKisWsApprovalResponse } from "@/features/dashboard/types/dashboard.types";
import type { KisCredentialInput } from "@/lib/kis/config";
import { hasKisConfig, normalizeTradingEnv } from "@/lib/kis/config";
import { getKisApprovalKey, resolveKisWebSocketUrl } from "@/lib/kis/approval";
import { NextRequest, NextResponse } from "next/server";

/**
 * @file app/api/kis/ws/approval/route.ts
 * @description KIS 웹소켓 approval key 발급 라우트
 */

/**
 * 실시간 웹소켓 승인키 발급
 * @param request appKey/appSecret/tradingEnv JSON 본문
 * @returns approval key + ws url
 * @see features/dashboard/components/dashboard-main.tsx connectKisRealtimePrice - 실시간 체결가 구독 진입점
 */
export async function POST(request: NextRequest) {
  const body = (await request.json()) as Partial<DashboardKisWsApprovalRequest>;

  const credentials: KisCredentialInput = {
    appKey: body.appKey?.trim(),
    appSecret: body.appSecret?.trim(),
    tradingEnv: normalizeTradingEnv(body.tradingEnv),
  };

  if (!hasKisConfig(credentials)) {
    return NextResponse.json(
      {
        ok: false,
        tradingEnv: normalizeTradingEnv(credentials.tradingEnv),
        message: "앱 키와 앱 시크릿을 모두 입력해 주세요.",
      } satisfies DashboardKisWsApprovalResponse,
      { status: 400 },
    );
  }

  try {
    const approvalKey = await getKisApprovalKey(credentials);
    const wsUrl = resolveKisWebSocketUrl(credentials);

    return NextResponse.json({
      ok: true,
      tradingEnv: normalizeTradingEnv(credentials.tradingEnv),
      approvalKey,
      wsUrl,
      message: "KIS 실시간 웹소켓 승인키 발급이 완료되었습니다.",
    } satisfies DashboardKisWsApprovalResponse);
  } catch (error) {
    const message = error instanceof Error ? error.message : "웹소켓 승인키 발급 중 오류가 발생했습니다.";

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

interface DashboardKisWsApprovalRequest {
  appKey: string;
  appSecret: string;
  tradingEnv: "real" | "mock";
}