import config from '../configs'

const pageMap = {
  'login': config.loginUrl,
  'regist': config.registUrl
}

var scrollTimer = null

var page = {
  // 切换页面，并错误提示
  turnPage: (message, url) => {
    if (message) {
      alert(message)
    }
    if (url) {
      if (pageMap[url]) {
        url = pageMap[url]
      }
      window.location.href = url
    }
  },
  // 确定导航tab页，是否show nav
  showNav: path => {
    switch (path) {
      case '/':
        return true
      case '/session':
        return true
      case '/contacts':
        return true
      case '/room':
        return true
      case '/general':
        return true
      default:
        return false
    }
  },
  // 滚动聊天列表到底部
  scrollChatListDown: (pos, initCount) => {
    let dom = document.getElementById('msg-content')
    if (!dom) {
      return
    }
    if (dom.style.overflowY !== 'hidden') {
      let maxCount = 5
      initCount = initCount || 1
      if (typeof pos !== 'number') {
        pos = Math.max(dom.scrollHeight - dom.clientHeight, 888888)
      }
      
      dom.scrollTop = pos
      if ((dom.scrollTop < pos) && (initCount < maxCount)) {
        clearTimeout(scrollTimer)
        scrollTimer = setTimeout(() => {
          initCount++
          page.scrollChatListDown(pos, initCount)
        }, 200)
      }
    }
  },
  getChatListHeight: () => {
    return document.getElementById('msg-content').scrollHeight
  },
  getChatListScroll: () => {
    return document.getElementById('msg-content').scrollTop
  }
}

export default page