import type { KisRuntimeCredentials } from "@/features/settings/store/use-kis-runtime-store";
import {
  DOMESTIC_KIS_SESSION_OVERRIDE_HEADER,
  DOMESTIC_KIS_SESSION_OVERRIDE_STORAGE_KEY,
  parseDomesticKisSession,
} from "@/lib/kis/domestic-market-session";

export interface KisApiErrorPayload {
  ok?: boolean;
  message?: string;
  error?: string;
  errorCode?: string;
}

interface BuildKisRequestHeadersOptions {
  jsonContentType?: boolean;
  includeAccountNo?: boolean;
  includeSessionOverride?: boolean;
}

/**
 * @description KIS API 응답에서 사용자 노출용 에러 메시지를 추출합니다.
 * @see features/trade/apis/kis-stock.api.ts 종목/주문 API 실패 처리
 * @see features/dashboard/apis/dashboard.api.ts 대시보드 API 실패 처리
 */
export function resolveKisApiErrorMessage(
  payload: unknown,
  fallbackMessage: string,
) {
  if (!payload || typeof payload !== "object") {
    return fallbackMessage;
  }

  const response = payload as KisApiErrorPayload;
  return response.message || response.error || fallbackMessage;
}

/**
 * @description KIS API 호출용 공통 헤더를 생성합니다.
 * @see features/dashboard/apis/dashboard.api.ts 잔고/지수/활동 조회 공통 헤더
 * @see features/trade/apis/kis-stock.api.ts 종목/호가/차트/주문 공통 헤더
 */
export function buildKisRequestHeaders(
  credentials: KisRuntimeCredentials,
  options?: BuildKisRequestHeadersOptions,
) {
  const headers: Record<string, string> = {
    "x-kis-app-key": credentials.appKey,
    "x-kis-app-secret": credentials.appSecret,
    "x-kis-trading-env": credentials.tradingEnv,
  };

  if (options?.jsonContentType) {
    headers["content-type"] = "application/json";
  }

  if (options?.includeAccountNo && credentials.accountNo.trim()) {
    headers["x-kis-account-no"] = credentials.accountNo.trim();
  }

  if (options?.includeSessionOverride) {
    const sessionOverride = readSessionOverrideForDev();
    if (sessionOverride) {
      headers[DOMESTIC_KIS_SESSION_OVERRIDE_HEADER] = sessionOverride;
    }
  }

  return headers;
}

function readSessionOverrideForDev() {
  if (typeof window === "undefined") return null;

  try {
    const raw = window.localStorage.getItem(
      DOMESTIC_KIS_SESSION_OVERRIDE_STORAGE_KEY,
    );
    return parseDomesticKisSession(raw);
  } catch {
    return null;
  }
}