import { NextRequest, NextResponse } from "next/server";
import { executeOrderCash } from "@/lib/kis/trade";
import {
  DashboardStockCashOrderRequest,
  DashboardStockCashOrderResponse,
} from "@/features/trade/types/trade.types";
import {
  KisCredentialInput,
  hasKisConfig,
  normalizeTradingEnv,
} from "@/lib/kis/config";

/**
 * @file app/api/kis/domestic/order-cash/route.ts
 * @description 국내주식 현금 주문 API
 */

export async function POST(request: NextRequest) {
  const credentials = readKisCredentialsFromHeaders(request.headers);

  if (!hasKisConfig(credentials)) {
    return NextResponse.json(
      {
        ok: false,
        tradingEnv: normalizeTradingEnv(credentials.tradingEnv),
        message: "KIS API 키 설정이 필요합니다.",
      },
      { status: 400 },
    );
  }

  try {
    const body = (await request.json()) as DashboardStockCashOrderRequest;

    // TODO: Validate body fields (symbol, quantity, price, etc.)
    if (
      !body.symbol ||
      !body.accountNo ||
      !body.accountProductCode ||
      body.quantity <= 0
    ) {
      return NextResponse.json(
        {
          ok: false,
          tradingEnv: normalizeTradingEnv(credentials.tradingEnv),
          message:
            "주문 정보가 올바르지 않습니다. (종목코드, 계좌번호, 수량 확인)",
        },
        { status: 400 },
      );
    }

    const output = await executeOrderCash(
      {
        symbol: body.symbol,
        side: body.side,
        orderType: body.orderType,
        quantity: body.quantity,
        price: body.price,
        accountNo: body.accountNo,
        accountProductCode: body.accountProductCode,
      },
      credentials,
    );

    const response: DashboardStockCashOrderResponse = {
      ok: true,
      tradingEnv: normalizeTradingEnv(credentials.tradingEnv),
      message: "주문이 전송되었습니다.",
      orderNo: output.ODNO,
      orderTime: output.ORD_TMD,
      orderOrgNo: output.KRX_FWDG_ORD_ORGNO,
    };

    return NextResponse.json(response);
  } catch (error) {
    const message =
      error instanceof Error
        ? error.message
        : "주문 전송 중 오류가 발생했습니다.";
    return NextResponse.json(
      {
        ok: false,
        tradingEnv: normalizeTradingEnv(credentials.tradingEnv),
        message,
      },
      { status: 500 },
    );
  }
}

function readKisCredentialsFromHeaders(headers: Headers): KisCredentialInput {
  const appKey = headers.get("x-kis-app-key")?.trim();
  const appSecret = headers.get("x-kis-app-secret")?.trim();
  const tradingEnv = normalizeTradingEnv(
    headers.get("x-kis-trading-env") ?? undefined,
  );

  return {
    appKey,
    appSecret,
    tradingEnv,
  };
}