const cloud = require('wx-server-sdk')
cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
const db = cloud.database()

exports.main = async (event, context) => {
  const { OPENID, APPID } = cloud.getWXContext()

  try {
    // 查找或创建用户
    const userRes = await db.collection('users').where({ openid: OPENID }).get()
    let userInfo

    if (userRes.data.length === 0) {
      // 新用户 - 创建档案
      const newUser = {
        openid: OPENID,
        nickName: event.nickName || '宠物爱好者',
        avatarUrl: event.avatarUrl || '',
        handle: '',
        location: '',
        bio: '',
        stats: { posts: 0, friends: 0, likes: 0 },
        lastLocation: null,
        isOnline: true,
        lastSeen: new Date().toISOString(),
        pets: [],
        createdAt: db.serverDate(),
        updatedAt: db.serverDate(),
      }
      const addRes = await db.collection('users').add({ data: newUser })
      userInfo = { _id: addRes._id, ...newUser }
    } else {
      // 老用户 - 更新在线状态
      userInfo = userRes.data[0]
      await db.collection('users').doc(userInfo._id).update({
        data: {
          isOnline: true,
          lastSeen: db.serverDate(),
          updatedAt: db.serverDate(),
        },
      })
    }

    return { code: 0, data: { userInfo } }
  } catch (e) {
    return { code: -1, message: e.message }
  }
}