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

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

  if (action === 'profile') {
    const users = await db.collection('users').where({ openid }).get()
    if (users.data.length === 0) return { code: 1001, message: '用户不存在' }
    const user = users.data[0]
    const binds = await db.collection('bindings').where({ openid, status: 'active' }).count()
    return {
      code: 0,
      data: {
        user_id: user._id,
        nickname: user.nickname || '用户' + openid.slice(-4),
        avatar_url: user.avatar_url || '',
        phone: user.phone || '',
        gender: user.gender || 0,
        device_count: binds.total,
        created_at: user.created_at
      }
    }
  }

  if (action === 'update') {
    const updates = {}
    if (event.data.nickname) updates.nickname = event.data.nickname
    if (event.data.avatar_url) updates.avatar_url = event.data.avatar_url
    if (event.data.gender !== undefined) updates.gender = event.data.gender
    await db.collection('users').where({ openid }).update({ data: updates })
    return { code: 0, data: {} }
  }

  return { code: -1, message: '未知操作' }
}