import { ref, computed } from 'vue'
export default function useTable(proxy, fields) {
  const treeData = ref([])
  const loading = ref(false)
  const tableData = computed(() => {
    const list = getFlatData(JSON.parse(JSON.stringify(treeData.value)))
    // return list.filter(item => item[fields])
  })

  const getFlatData = (data) => {
    let list = []
    for (const item of data) {
      const children = item.children
      delete item.children
      list.push(item)
      if(children){
        list = list.concat(getFlatData(children))
      }
    }
    return list
  }

  const setMergeData = (data) => {
    let length1 = 0
    let length2 = 0
    for (const item1 of data) {
      const children1 = item1.children || []
      const sum = getSum(children1)
      length1 += sum
      for (const item2 of children1) {
        const children2 = item2.children || []
        length2 += children2.length
        for (const item3 of children2) {
          item3.length1 = length1
          item3.sum1 = sum
          item3.length2 = length2
          item3.sum2 = children2.length
        }
      }
    }
  }

  const getSum = (data) => {
    let sum = 0
    for (const item of data) {
      const children = item.children || []
      for (const it of children) {
        sum++
        if(it.children) {
          getSum(it.children)
        }
      }
    }
    return sum
  }

  const handlePreview = (file) => {
    proxy.$modal
    .confirm(`下载此文件: ${file.name}？`)
    .then(() => {
      window.open(file.url)
    })
  }

  return {
    treeData,
    loading,
    tableData,
    setMergeData,
    getSum,
    handlePreview
  }
}