import {MessageBox} from 'element-ui'
import $moment from './moment'
import $dict from './dict'
import $encryption from './encryption'
import $coin from './coin'
import Area from "./area"
import ID from "./identity"
import $reg from "./regular"

/**
 * 生成子节点的递归方法
 * @param parent 父元素
 * @param pending 待递归的数组
 * @param config 配置
 */
const addChild = (parent, pending, config) => {
  let conf = {
      key: 'id',
      parent: 'parentId',
      children: 'children',
      ...config
    },
    doBeforeCount = pending.length
  for (let i = pending.length - 1; i >= 0; i--) {
    let e = pending[i]
    if (e[conf.parent] == parent[conf.key]) {
      parent[conf.children] = [...(parent[conf.children] || []), e]
      pending.splice(i, 1)
    }
  }
  parent[conf.children] &&
  (parent[conf.children] = parent[conf.children].reverse())
  if (pending.length > 0 && doBeforeCount > pending.length) {
    parent[conf.children].map(c => addChild(c, pending, conf))
  }
}

/**
 * 封装提示框
 */
const $confirm = (content, options) => {
  return MessageBox.confirm(content, {
    type: 'warning',
    confirmButtonText: '确认',
    center: true,
    title: '提示',
    dangerouslyUseHTMLString: true,
    customClass: "AiConfirm",
    ...options
  }).catch(() => 0)
}


const $decimalCalc = (...arr) => {
  // 确认提升精度
  let decimalLengthes = arr.map(e => {
    let index = ('' + e).indexOf('.')
    return ('' + e).length - index
  })
  let maxDecimal = Math.max(...decimalLengthes),
    precision = Math.pow(10, maxDecimal)
  // 计算
  let intArr = arr.map(e => (Number(e) || 0) * precision)
  // 返回计算值
  return intArr.reduce((t, a) => t + a) / precision
}

/**
 * 封装权限判断方法
 */
const $permissions = flag => {
  let buttons = []
  if (localStorage.getItem('vuex')) {
    const vuex = JSON.parse(localStorage.getItem('vuex'))
    buttons = vuex.user.info.buttons
  }
  if (buttons && buttons.length > 0) {
    return buttons.some(b => b.id == flag || b.permission == flag)
  } else return false
}

const $colorUtils = {
  Hex2RGBA(color, alpha = 1) {
    let hex = 0
    if (color.charAt(0) == '#') {
      if (color.length == 4) {
        // 检测诸如#FFF简写格式
        color =
          '#' +
          color.charAt(1).repeat(2) +
          color.charAt(2).repeat(2) +
          color.charAt(3).repeat(2)
      }
      hex = parseInt(color.slice(1), 16)
    }
    let r = (hex >> 16) & 0xff
    let g = (hex >> 8) & 0xff
    let b = hex & 0xff
    return `rgba(${r},${g},${b},${alpha})`
  },
  RGBtoHex(r, g, b) {
    let hex = (r << 16) | (g << 8) | b
    return '#' + hex.toString(16)
  }
}
export const $copy = any => {
  if (any) {
    return JSON.parse(JSON.stringify(any))
  } else return any
}

let debounceWait = null
export const $debounce = (fn, wait) => {
  if (debounceWait !== null) clearTimeout(debounceWait);
  debounceWait = setTimeout(function () {
    typeof fn === 'function' && fn();
  }, wait);
}
export const $checkJson = str => {
  if (typeof str == 'string') {
    try {
      let obj = JSON.parse(str);
      return !!(typeof obj == 'object' && obj);
    } catch (e) {
      return false;
    }
  }
  return false;
}
const $load = (sdk, interval = 200, name = "", c = 0) => {
  if (!!sdk) {
    return Promise.resolve()
  } else if (c < 10) {
    return new Promise(resolve => setTimeout(() => resolve($load(sdk, interval, name, ++c)), interval))
  } else return Promise.reject("无法加载" + name)
}

export {Area, ID}

export default {
  addChild,
  $confirm,
  $decimalCalc,
  $dict,
  $permissions,
  $colorUtils,
  $moment,
  $encryption,
  $coin,
  $injectLib: (url, cb = () => 0) => {
    const scriptList = document.body.querySelectorAll('script')
    if (Object.values(scriptList || {}).findIndex(e => e.src == url) == -1) {
      const script = document.createElement('script')
      script.type = 'text/javascript'
      script.src = url
      script.addEventListener('load', () => cb())
      document.body.appendChild(script)
    } else cb()
  },
  $injectCss: (url, cb = () => 0) => {
    const linkList = document.body.querySelectorAll('link')
    if (Object.values(linkList || {}).findIndex(e => e.href == url) == -1) {
      const link = document.createElement('link')
      link.rel = "stylesheet"
      link.type = "text/css"
      link.href = url
      link.addEventListener('load', () => cb())
      document.head.appendChild(link)
    } else cb()
  },
  $dateFormat: (time, format) => {
    return $moment(time)
      .format(format || 'YYYY-MM-DD')
      .replace('Invalid Date', '')
  },
  $copy,
  $download: (url, name) => {
    fetch(url).then(res => res.blob()).then(blob => {
      const link = document.createElement('a')
      link.style.display = 'none'
      link.href = URL.createObjectURL(blob)
      !!name && link.setAttribute("download", name)
      document.body.appendChild(link)
      link.click()
      document.body.removeChild(link)
    })
  },
  $debounce,
  $checkJson,
  $arr2tree: (list, config = {}) => {
    let result = []
    const {key = 'id', parent = 'parentId', children = 'children'} = config, itemMap = {},
      ids = list?.map(e => `#${e[key]}#`)?.toString()
    for (const e of list) {
      const id = e[key], pid = e[parent]
      itemMap[id] = {...e, [children]: [itemMap[id]?.[children]].flat().filter(Boolean)}
      const treeItem = itemMap[id]
      if (!!pid && ids.indexOf(`#${pid}#`) > -1) {
        if (!itemMap[pid]) {
          itemMap[pid] = {
            children: []
          }
        }
        itemMap[pid].children.push(treeItem)
      } else result.push(treeItem)
    }
    const removeNullChildren = node => {
      if (node[children] && node[children].length > 0) {
        node[children].map(c => removeNullChildren(c))
      } else delete node[children]
    }
    if (!!config.root) {
      result = itemMap[config.root]
    }
    result.forEach(removeNullChildren)
    return result
  },
  $load,
  $reg,
  Area,
  ID,
  $arrDepth: (arr) => {
    if (Array.isArray(arr)) {
      let max = 1
      for (let i = 0; i < arr.length; i++) {
        const depth = this.$arrDepth(arr[i])
        if (depth > max) {
          max = depth
        }
      }
      return max
    } else return 0
  },
  $isEmpty(obj) {
    if (obj === null || obj === undefined) return true;
    if (typeof obj === 'string' && obj.trim() === '') return true;
    if (Array.isArray(obj) && obj.length === 0) return true;
    return typeof obj === 'object' && Object.keys(obj).length === 0;
  }
}