import {
  callAppHook
} from 'uni-core/service/plugins/util'

import initOn from 'uni-core/service/bridge/on'

import {
  NETWORK_TYPES
} from '../api/constants'

import {
  getCurrentPages
} from './page'

import {
  consumePlusMessage
} from './plus-message'

import tabBar from './tab-bar'

import {
  publish
} from '../bridge'

import {
  initSubscribeHandlers
} from './subscribe-handlers'

import {
  perf
} from './perf'

let appCtx

export function getApp () {
  return appCtx
}

function initGlobalListeners () {
  const emit = UniServiceJSBridge.emit

  plus.key.addEventListener('backbutton', () => {
    uni.navigateBack({
      from: 'backbutton'
    })
  })

  plus.globalEvent.addEventListener('pause', () => {
    emit('onAppEnterBackground')
  })

  plus.globalEvent.addEventListener('resume', () => {
    emit('onAppEnterForeground')
  })

  plus.globalEvent.addEventListener('netchange', () => {
    const networkType = NETWORK_TYPES[plus.networkinfo.getCurrentType()]
    publish('onNetworkStatusChange', {
      isConnected: networkType !== 'none',
      networkType
    })
  })

  plus.globalEvent.addEventListener('KeyboardHeightChange', function (event) {
    publish('onKeyboardHeightChange', {
      height: event.height
    })
  })

  plus.globalEvent.addEventListener('plusMessage', function (e) {
    if (process.env.NODE_ENV !== 'production') {
      console.log('[plusMessage]:[' + Date.now() + ']' + JSON.stringify(e.data))
    }
    if (e.data && e.data.type) {
      const type = e.data.type
      consumePlusMessage(type, e.data.args || {})
    }
  })
}

function initAppLaunch (appVm) {
  const args = {
    path: __uniConfig.entryPagePath,
    query: {},
    scene: 1001
  }

  callAppHook(appVm, 'onLaunch', args)
  callAppHook(appVm, 'onShow', args)
}

function initTabBar () {
  if (!__uniConfig.tabBar || !__uniConfig.tabBar.list.length) {
    return
  }

  __uniConfig.tabBar.selected = 0

  const selected = __uniConfig.tabBar.list.findIndex(page => page.pagePath === __uniConfig.entryPagePath)
  if (selected !== -1) {
    // 取当前 tab 索引值
    __uniConfig.tabBar.selected = selected
  }

  tabBar.init(__uniConfig.tabBar, (item, index) => {
    uni.switchTab({
      url: '/' + item.pagePath,
      openType: 'switchTab',
      from: 'tabBar',
      success () {
        UniServiceJSBridge.emit('onTabItemTap', {
          index,
          text: item.text,
          pagePath: item.pagePath
        })
      }
    })
  })
}

export function registerApp (appVm) {
  if (process.env.NODE_ENV !== 'production') {
    console.log(`[uni-app] registerApp`)
  }

  appCtx = appVm

  appCtx.globalData = appVm.$options.globalData || {}

  initOn(UniServiceJSBridge.on, {
    getApp,
    getCurrentPages
  })

  initTabBar()

  initGlobalListeners()

  initSubscribeHandlers()

  initAppLaunch(appVm)

  __uniConfig.ready = true

  process.env.NODE_ENV !== 'production' && perf('registerApp')
}