import type { KisCredentialInput } from "@/lib/kis/config";
import { getKisConfig } from "@/lib/kis/config";
import { getKisAccessToken } from "@/lib/kis/token";

/**
 * @file lib/kis/client.ts
 * @description KIS REST 공통 클라이언트(실전/모의 공통)
 */

export interface KisApiEnvelope<TOutput> {
  rt_cd?: string;
  msg_cd?: string;
  msg1?: string;
  output?: TOutput;
  output1?: unknown;
  output2?: unknown;
}

/**
 * KIS GET 호출
 * @param apiPath REST 경로
 * @param trId KIS TR ID
 * @param params 쿼리 파라미터
 * @param credentials 사용자 입력 키(선택)
 * @returns KIS 원본 응답
 * @see lib/kis/domestic.ts getDomesticQuote/getDomesticDailyPrice - 대시보드 시세 데이터 소스
 */
export async function kisGet<TOutput>(
  apiPath: string,
  trId: string,
  params: Record<string, string>,
  credentials?: KisCredentialInput,
): Promise<KisApiEnvelope<TOutput>> {
  const config = getKisConfig(credentials);
  const token = await getKisAccessToken(credentials);

  const url = new URL(apiPath, config.baseUrl);
  Object.entries(params).forEach(([key, value]) => {
    if (value !== "") url.searchParams.set(key, value);
  });

  const response = await fetch(url.toString(), {
    method: "GET",
    headers: {
      "content-type": "application/json; charset=utf-8",
      authorization: `Bearer ${token}`,
      appkey: config.appKey,
      appsecret: config.appSecret,
      tr_id: trId,
      tr_cont: "",
      custtype: "P",
    },
    cache: "no-store",
  });

  const rawText = await response.text();
  const payload = tryParseKisEnvelope<TOutput>(rawText);

  if (!response.ok) {
    const detail = payload.msg1 || rawText.slice(0, 200);
    throw new Error(
      detail
        ? `KIS API 요청 실패 (${response.status}): ${detail}`
        : `KIS API 요청 실패 (${response.status})`,
    );
  }

  if (payload.rt_cd && payload.rt_cd !== "0") {
    const detail = [payload.msg1, payload.msg_cd].filter(Boolean).join(" / ");
    throw new Error(detail || "KIS API 비즈니스 오류가 발생했습니다.");
  }

  return payload;
}

/**
 * KIS POST 호출 (주문 등)
 * @param apiPath REST 경로
 * @param trId KIS TR ID
 * @param body 요청 본문
 * @param credentials 사용자 입력 키(선택)
 * @returns KIS 원본 응답
 */
export async function kisPost<TOutput>(
  apiPath: string,
  trId: string,
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  body: Record<string, any>,
  credentials?: KisCredentialInput,
): Promise<KisApiEnvelope<TOutput>> {
  const config = getKisConfig(credentials);
  const token = await getKisAccessToken(credentials);

  const url = new URL(apiPath, config.baseUrl);

  const response = await fetch(url.toString(), {
    method: "POST",
    headers: {
      "content-type": "application/json; charset=utf-8",
      authorization: `Bearer ${token}`,
      appkey: config.appKey,
      appsecret: config.appSecret,
      tr_id: trId,
      tr_cont: "",
      custtype: "P",
    },
    body: JSON.stringify(body),
    cache: "no-store",
  });

  const rawText = await response.text();
  const payload = tryParseKisEnvelope<TOutput>(rawText);

  if (!response.ok) {
    const detail = payload.msg1 || rawText.slice(0, 200);
    throw new Error(
      detail
        ? `KIS API 요청 실패 (${response.status}): ${detail}`
        : `KIS API 요청 실패 (${response.status})`,
    );
  }

  if (payload.rt_cd && payload.rt_cd !== "0") {
    const detail = [payload.msg1, payload.msg_cd].filter(Boolean).join(" / ");
    throw new Error(detail || "KIS API 비즈니스 오류가 발생했습니다.");
  }

  return payload;
}

/**
 * KIS 응답을 안전하게 JSON으로 파싱합니다.
 * @param rawText fetch 응답 원문
 * @returns KisApiEnvelope
 * @see lib/kis/token.ts tryParseTokenResponse - 토큰 발급 응답 파싱 방식과 동일 패턴
 */
function tryParseKisEnvelope<TOutput>(
  rawText: string,
): KisApiEnvelope<TOutput> {
  try {
    return JSON.parse(rawText) as KisApiEnvelope<TOutput>;
  } catch {
    return {
      msg1: rawText.slice(0, 200),
    };
  }
}

// 하위 호환(alias)
// 하위 호환(alias)
export const kisMockGet = kisGet;
export const kisMockPost = kisPost;