import { signRequest, KALSHI_API_BASE } from './auth.js';

async function kalshiFetch(method, path, body = null) {
  const headers = signRequest(method, path);
  const opts = { method, headers };
  if (body) opts.body = JSON.stringify(body);

  const res = await fetch(`${KALSHI_API_BASE}${path}`, opts);
  if (!res.ok) {
    const text = await res.text();
    throw new Error(`Kalshi API ${method} ${path} → ${res.status}: ${text}`);
  }
  return res.json();
}

/**
 * Get events for the BTC 15-min series.
 * Returns the currently active event + its markets.
 */
export async function getActiveBTCEvent() {
  const data = await kalshiFetch('GET', '/trade-api/v2/events?series_ticker=KXBTC15M&status=open&limit=1');
  const event = data.events?.[0];
  if (!event) return null;
  return event;
}

/**
 * Get markets for a specific event ticker.
 */
export async function getEventMarkets(eventTicker) {
  const data = await kalshiFetch('GET', `/trade-api/v2/events/${eventTicker}`);
  return data.event?.markets || [];
}

/**
 * Get orderbook for a specific market ticker.
 */
export async function getOrderbook(ticker) {
  const data = await kalshiFetch('GET', `/trade-api/v2/markets/${ticker}/orderbook`);
  return data.orderbook || data;
}

/**
 * Get single market details.
 */
export async function getMarket(ticker) {
  const data = await kalshiFetch('GET', `/trade-api/v2/markets/${ticker}`);
  return data.market || data;
}

/**
 * Place a real order on Kalshi. NOT used in paper mode.
 */
export async function placeOrder(params) {
  return kalshiFetch('POST', '/trade-api/v2/portfolio/orders', params);
}

/**
 * Get wallet balance.
 */
export async function getBalance() {
  return kalshiFetch('GET', '/trade-api/v2/portfolio/balance');
}

export { kalshiFetch };