import { resolveWechatAddressName } from '../user/display-name.mjs';

export function buildGreetingText(user) {
  const name = resolveWechatAddressName(user);
  return name ? `你好，${name}！我在呢，有什么需要？` : '你好！我在呢，有什么需要？';
}

export function buildStatusText(user, fallbackText) {
  const name = resolveWechatAddressName(user);
  if (!name) return fallbackText;
  return `我在这边，${name}。上一条如果还没完成，我会继续把结果发给你；你也可以直接补一句要求。`;
}

export function buildConnectivityTestReply(user) {
  const name = resolveWechatAddressName(user);
  return name
    ? `${name}，公众号消息通道正常，我收到你的测试了。`
    : '公众号消息通道正常，我收到你的测试了。';
}

/**
 * Resolve an immediate sync XML reply for lightweight intents.
 * @returns {string|null}
 */
export function resolveSyncReply(wechatIntent, user, { statusFallbackText = '' } = {}) {
  switch (wechatIntent?.kind) {
    case 'status.probe':
      return buildStatusText(user, statusFallbackText);
    case 'greeting':
      return buildGreetingText(user);
    case 'connectivity.test':
      return buildConnectivityTestReply(user);
    default:
      return null;
  }
}

/**
 * Whether this intent should be answered synchronously before agent dispatch.
 */
export function shouldHandleSyncReply(intent, wechatIntent) {
  const msgType = String(intent?.msgType ?? '').toLowerCase();
  if (wechatIntent?.kind === 'connectivity.test') {
    return msgType === 'text' || msgType === 'voice';
  }
  if (wechatIntent?.kind === 'status.probe' || wechatIntent?.kind === 'greeting') {
    return msgType === 'text';
  }
  return false;
}