import type { DashboardKisWsApprovalResponse } from "@/features/trade/types/trade.types";
import { hasKisApiSession } from "@/app/api/kis/_session";
import { getKisApprovalKey, resolveKisWebSocketUrl } from "@/lib/kis/approval";
import { normalizeTradingEnv } from "@/lib/kis/config";
import {
  parseKisCredentialRequest,
  validateKisCredentialInput,
} from "@/lib/kis/request";
import {
  createKisApiErrorResponse,
  KIS_API_ERROR_CODE,
  toKisApiErrorMessage,
} from "@/app/api/kis/_response";
import { NextRequest, NextResponse } from "next/server";

/**
 * @file app/api/kis/ws/approval/route.ts
 * @description KIS 웹소켓 승인키와 WS URL을 발급합니다.
 */

/**
 * @description 실시간 웹소켓 연결 정보를 발급합니다.
 * @see features/trade/hooks/useKisTradeWebSocket.ts
 */
export async function POST(request: NextRequest) {
  const credentials = await parseKisCredentialRequest(request);
  const tradingEnv = normalizeTradingEnv(credentials.tradingEnv);

  const hasSession = await hasKisApiSession();
  if (!hasSession) {
    return createKisApiErrorResponse({
      status: 401,
      code: KIS_API_ERROR_CODE.AUTH_REQUIRED,
      message: "로그인이 필요합니다.",
      tradingEnv,
    });
  }

  const invalidMessage = validateKisCredentialInput(credentials);
  if (invalidMessage) {
    return createKisApiErrorResponse({
      status: 400,
      code: KIS_API_ERROR_CODE.INVALID_REQUEST,
      message: invalidMessage,
      tradingEnv,
    });
  }

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

    return NextResponse.json({
      ok: true,
      tradingEnv,
      approvalKey,
      wsUrl,
      message: "웹소켓 승인키 발급이 완료되었습니다.",
    } satisfies DashboardKisWsApprovalResponse);
  } catch (error) {
    return createKisApiErrorResponse({
      status: 401,
      code: KIS_API_ERROR_CODE.UNAUTHORIZED,
      message: toKisApiErrorMessage(
        error,
        "웹소켓 승인키 발급 중 오류가 발생했습니다.",
      ),
      tradingEnv,
    });
  }
}