/**
 * 连接管理模块 - 订单群聊跳转（后端准备群 + 稳定连接）
 */
import request from './request';
import { persistGroupMeta } from './im-user.js';
const app = getApp();

function waitForConnection(expectedUserId, timeout = 15000) {
  return new Promise((resolve, reject) => {
    const status = wx.goEasy?.getConnectionStatus?.();
    const currentUserId = wx.goEasy?.im?.userId;
    if ((status === 'connected' || status === 'reconnected') && currentUserId === expectedUserId) {
      resolve();
      return;
    }

    const timer = setTimeout(() => {
      app.off('connectionChanged', handler);
      reject(new Error('连接超时'));
    }, timeout);

    const handler = (event) => {
      if (event.status === 'connected') {
        const uid = event.userId || wx.goEasy?.im?.userId;
        if (uid === expectedUserId) {
          clearTimeout(timer);
          app.off('connectionChanged', handler);
          resolve();
        }
      } else if (event.status === 'disconnected' && event.manual) {
        clearTimeout(timer);
        app.off('connectionChanged', handler);
        reject(new Error('连接已断开'));
      }
    };
    app.on('connectionChanged', handler);
  });
}

async function ensureIdentityConnection(identityType, userId) {
  app.globalData.currentRole = identityType;
  wx.setStorageSync('currentRole', identityType);

  const uid = userId.replace(/^(Ds|Sj|Boss|Gs|Zz|Kh)/, '');
  const avatar = wx.getStorageSync('touxiang') ||
    (app.globalData.ossImageUrl + app.globalData.morentouxiang);
  app.globalData.currentUser = {
    id: userId,
    name: app.globalData.currentUser?.name || `用户${uid}`,
    avatar: avatar,
  };

  const status = wx.goEasy?.getConnectionStatus?.() || 'disconnected';
  const currentUserId = wx.goEasy?.im?.userId;

  if ((status === 'connected' || status === 'reconnected') && currentUserId === userId) {
    return;
  }

  if (currentUserId && currentUserId !== userId && app.disconnectGoEasy) {
    await app.disconnectGoEasy();
  }

  const waitPromise = waitForConnection(userId);
  const connectPromise = app.connectWithIdentity(identityType, userId, true);
  await waitPromise;
  await connectPromise;
}

class ConnectionManager {
  async connectAndChat(params) {
    const { identityType, userId, targetUser } = params;
    if (!identityType || !userId || !targetUser || !targetUser.id) {
      throw new Error('参数不完整');
    }

    await ensureIdentityConnection(identityType, userId);

    const currentUser = {
      id: userId,
      name: app.globalData.currentUser?.name || '用户',
      avatar: app.globalData.currentUser?.avatar || (app.globalData.ossImageUrl + app.globalData.morentouxiang),
    };

    const to = {
      id: targetUser.id,
      name: targetUser.name || '用户',
      avatar: targetUser.avatar || (app.globalData.ossImageUrl + app.globalData.morentouxiang),
    };

    const param = { to, currentUser };
    const path = '/pages/liaotian/liaotian?data=' + encodeURIComponent(JSON.stringify(param));
    wx.navigateTo({ url: path });
  }

  async connectToGroupChat(params) {
    const { identityType, userId, orderId, groupName, groupAvatar, isCross } = params;
    if (!identityType || !userId || !orderId) {
      throw new Error('参数不完整：identityType, userId, orderId 必填');
    }

    wx.showLoading({ title: '建立联系中...', mask: true });

    try {
      await ensureIdentityConnection(identityType, userId);

      const res = await request({
        url: '/dingdan/ltdhzb',
        method: 'POST',
        data: {
          dingdan_id: orderId,
          identityType,
          push_order_card: true,
        },
      });

      const body = res?.data || {};
      if (body.code !== 0 || !body.data || !body.data.groupId) {
        throw new Error(body.msg || '准备群聊失败');
      }

      const chatData = body.data;
      const realGroupId = chatData.groupId;

      let avatar = chatData.counterpartAvatar || chatData.groupAvatar || groupAvatar || '';
      if (avatar && !avatar.startsWith('http')) {
        avatar = app.globalData.ossImageUrl + avatar.replace(/^\//, '');
      }

      if (!app.globalData.groupInfoMap) app.globalData.groupInfoMap = {};
      const meta = {
        name: chatData.counterpartName || chatData.groupName || groupName,
        avatar,
        orderId: chatData.orderId || orderId,
        orderDesc: chatData.orderDesc || '',
        orderZhuangtai: chatData.orderZhuangtai,
        dashouGoEasyId: chatData.dashouGoEasyId,
        partnerGoEasyId: chatData.partnerGoEasyId,
        dashouYonghuid: chatData.dashouYonghuid,
        partnerYonghuid: chatData.partnerYonghuid,
        dashouName: chatData.dashouName,
        partnerName: chatData.partnerName,
        dashouAvatar: chatData.dashouAvatar,
        partnerAvatar: chatData.partnerAvatar,
        counterpartId: chatData.counterpartId,
        counterpartYonghuid: chatData.counterpartYonghuid,
      };
      app.globalData.groupInfoMap[realGroupId] = meta;
      persistGroupMeta(app, realGroupId, meta);

      await new Promise((resolve, reject) => {
        wx.goEasy.im.subscribeGroup({
          groupIds: [realGroupId],
          onSuccess: () => resolve(),
          onFailed: (error) => reject(error),
        });
      });

      const param = {
        groupId: realGroupId,
        orderId: chatData.orderId || orderId,
        groupName: chatData.counterpartName || chatData.groupName || groupName || '订单群聊',
        groupAvatar: avatar,
        isCross: chatData.isCross != null ? chatData.isCross : (isCross || 0),
      };

      wx.hideLoading();
      wx.navigateTo({
        url: '/pages/qunliaotian/qunliaotian?data=' + encodeURIComponent(JSON.stringify(param)),
      });
    } catch (err) {
      wx.hideLoading();
      console.error('跳转群聊失败:', err);
      wx.showToast({ title: err.message || '进入聊天失败', icon: 'none' });
      throw err;
    }
  }
}

export default new ConnectionManager();