let height = wx.getSystemInfoSync().windowHeight
let itemCount = 1000
let items = [...new Array(itemCount)].map((v, i) => i)

import ad from '../index/ad'

ad({
    data: {
        disableScroll: false,
        height,
    },
    onLoad() {
        this.updated(items)
    },
    updated(items) {
        const startTime = Date.now()
        this.virtualList = this.virtualList || this.selectComponent('#wux-virtual-list')
        this.virtualList.render(items, () => {
            const diffTime = Date.now() - startTime
            console.log(`onSuccess - render time: ${diffTime}ms`)
        })
    },
    loadData() {
        if (itemCount >= 10000) return
        if (this.data.disableScroll) return
        this.setData({ disableScroll: true })
        wx.showLoading()
        setTimeout(() => {
            itemCount += 1000
            items = [...new Array(itemCount)].map((v, i) => i)
            this.updated(items)
            this.setData({ disableScroll: false })
            wx.hideLoading()
            wx.stopPullDownRefresh()
        }, 3000)
        console.log('loadData')
    },
    onChange(e) {
        const { startIndex, endIndex } = e.detail
        if (this.data.startIndex !== startIndex || this.data.endIndex !== endIndex) {
            this.setData(e.detail)
            console.log('onChange', e.detail)
        }
    },
    onPageScroll(e) {
        // 当页面滚动时调用组件 scrollHandler 方法
        this.virtualList.scrollHandler({ detail: e })
        // console.log('onPageScroll', e)
    },
    onReachBottom() {
        this.loadData()
        console.log('onReachBottom')
    },
    onPullDownRefresh() {
        itemCount = 0
        this.loadData()
        console.log('onPullDownRefresh')
    },
})