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

export const DEFAULT_SUBSCRIBE_INTRO_URL =
  'https://m.tkmind.cn/MindSpace/a70ff537-8908-486e-9b6c-042e07cc25db/public/tkmind-deep-intro.html';

/** 103 生产默认绑定入口：{H5_PUBLIC_BASE_URL}/auth/wechat/authorize?intent=login */
export const DEFAULT_PRODUCTION_BIND_URL =
  'https://m.tkmind.cn/auth/wechat/authorize?intent=login';

export function buildWechatTextLink(href, label) {
  const normalizedHref = String(href ?? '').trim();
  const normalizedLabel = String(label ?? '').trim();
  if (!normalizedHref) return normalizedLabel;
  if (!normalizedLabel) return normalizedHref;
  return `<a href="${normalizedHref}">${normalizedLabel}</a>`;
}

export function buildSubscribeWelcomeText({ bindUrl, introUrl = DEFAULT_SUBSCRIBE_INTRO_URL } = {}) {
  const normalizedBindUrl = String(bindUrl ?? '').trim();
  const normalizedIntroUrl = String(introUrl ?? '').trim();
  const lines = [
    '欢迎关注 TKMind 智趣 👋',
    '',
    '在微信里直接发消息即可：',
    '· 问答、写作、翻译',
    '· 生成精美网页并给链接',
    '· 发图解读报告/截图',
    '· 设置定时提醒与每日推送',
  ];
  if (normalizedIntroUrl) {
    lines.push('', '📖 了解更多：', buildWechatTextLink(normalizedIntroUrl, '点击链接'));
  }
  if (normalizedBindUrl) {
    lines.push('', '👉 先完成绑定再开始对话：', buildWechatTextLink(normalizedBindUrl, '点我绑定'));
  }
  lines.push('', '绑定后回复「你好」，或试试：', '「帮我做一个读书笔记页面」');
  return lines.join('\n');
}

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;
}