import type { KisRuntimeCredentials } from "@/features/dashboard/store/use-kis-runtime-store";
import type {
  DashboardChartTimeframe,
  DashboardStockCashOrderRequest,
  DashboardStockCashOrderResponse,
  DashboardStockChartResponse,
  DashboardStockOrderBookResponse,
  DashboardStockOverviewResponse,
  DashboardStockSearchResponse,
} from "@/features/dashboard/types/dashboard.types";

/**
 * 종목 검색 API 호출
 * @param keyword 검색어
 */
export async function fetchStockSearch(
  keyword: string,
  signal?: AbortSignal,
): Promise<DashboardStockSearchResponse> {
  const response = await fetch(
    `/api/kis/domestic/search?q=${encodeURIComponent(keyword)}`,
    {
      cache: "no-store",
      signal,
    },
  );

  const payload = (await response.json()) as
    | DashboardStockSearchResponse
    | { error?: string };

  if (!response.ok) {
    throw new Error(
      "error" in payload ? payload.error : "종목 검색 중 오류가 발생했습니다.",
    );
  }

  return payload as DashboardStockSearchResponse;
}

/**
 * 종목 상세 개요 조회 API 호출
 * @param symbol 종목코드
 * @param credentials KIS 인증 정보
 */
export async function fetchStockOverview(
  symbol: string,
  credentials: KisRuntimeCredentials,
): Promise<DashboardStockOverviewResponse> {
  const response = await fetch(
    `/api/kis/domestic/overview?symbol=${encodeURIComponent(symbol)}`,
    {
      method: "GET",
      headers: {
        "x-kis-app-key": credentials.appKey,
        "x-kis-app-secret": credentials.appSecret,
        "x-kis-trading-env": credentials.tradingEnv,
      },
      cache: "no-store",
    },
  );

  const payload = (await response.json()) as
    | DashboardStockOverviewResponse
    | { error?: string };

  if (!response.ok) {
    throw new Error(
      "error" in payload ? payload.error : "종목 조회 중 오류가 발생했습니다.",
    );
  }

  return payload as DashboardStockOverviewResponse;
}

/**
 * 종목 호가 조회 API 호출
 * @param symbol 종목코드
 * @param credentials KIS 인증 정보
 */
export async function fetchStockOrderBook(
  symbol: string,
  credentials: KisRuntimeCredentials,
  signal?: AbortSignal,
): Promise<DashboardStockOrderBookResponse> {
  const response = await fetch(
    `/api/kis/domestic/orderbook?symbol=${encodeURIComponent(symbol)}`,
    {
      method: "GET",
      headers: {
        "x-kis-app-key": credentials.appKey,
        "x-kis-app-secret": credentials.appSecret,
        "x-kis-trading-env": credentials.tradingEnv,
      },
      cache: "no-store", // 호가는 실시간성이 중요하므로 항상 최신 데이터 조회
      signal,
    },
  );

  const payload = (await response.json()) as
    | DashboardStockOrderBookResponse
    | { error?: string };

  if (!response.ok) {
    throw new Error(
      "error" in payload ? payload.error : "호가 조회 중 오류가 발생했습니다.",
    );
  }

  return payload as DashboardStockOrderBookResponse;
}

/**
 * 종목 차트(분봉/일봉/주봉) 조회 API 호출
 */
export async function fetchStockChart(
  symbol: string,
  timeframe: DashboardChartTimeframe,
  credentials: KisRuntimeCredentials,
  cursor?: string,
): Promise<DashboardStockChartResponse> {
  const query = new URLSearchParams({
    symbol,
    timeframe,
  });
  if (cursor) query.set("cursor", cursor);

  const response = await fetch(`/api/kis/domestic/chart?${query.toString()}`, {
    method: "GET",
    headers: {
      "x-kis-app-key": credentials.appKey,
      "x-kis-app-secret": credentials.appSecret,
      "x-kis-trading-env": credentials.tradingEnv,
    },
    cache: "no-store",
  });

  const payload = (await response.json()) as
    | DashboardStockChartResponse
    | { error?: string };

  if (!response.ok) {
    throw new Error(
      "error" in payload ? payload.error : "차트 조회 중 오류가 발생했습니다.",
    );
  }

  return payload as DashboardStockChartResponse;
}

/**
 * 주식 현금 주문 API 호출
 * @param request 주문 요청 데이터
 * @param credentials KIS 인증 정보
 */
export async function fetchOrderCash(
  request: DashboardStockCashOrderRequest,
  credentials: KisRuntimeCredentials,
): Promise<DashboardStockCashOrderResponse> {
  const response = await fetch("/api/kis/domestic/order-cash", {
    method: "POST",
    headers: {
      "content-type": "application/json",
      "x-kis-app-key": credentials.appKey,
      "x-kis-app-secret": credentials.appSecret,
      "x-kis-trading-env": credentials.tradingEnv,
    },
    body: JSON.stringify(request),
    cache: "no-store",
  });

  const payload = (await response.json()) as DashboardStockCashOrderResponse;

  if (!response.ok) {
    throw new Error(payload.message || "주문 전송 중 오류가 발생했습니다.");
  }

  return payload;
}