import env from '@/env/index.js'
import store from '@/store/index.js'
import { isDate, isString, isArray } from './is.js'
/**
 * 日期格式化，样例 yyyy-mm-dd hh:MM:ss
 * @param date Date 需要转换的日期
 * @param fmt string 转化的格式 yyyy-mm-dd hh:MM:ss
 */
export const dateTimeFormat = (date, fmt) => {
  if (isString(date)) {
    date = date.replace(/-/g, '/')
  }
  if (!isDate(date)) {
    date = new Date(date)
  }
  if (!date || isNaN(date.getTime())) {
    throw new Error('日期不正确')
  }
  let ret
  const opt = {
    'y+': date.getFullYear().toString(), // 年
    'm+': (date.getMonth() + 1).toString(), // 月
    'd+': date.getDate().toString(), // 日
    'h+': date.getHours().toString(), // 时
    'M+': date.getMinutes().toString(), // 分
    's+': date.getSeconds().toString() // 秒
  }
  for (let k in opt) {
    ret = new RegExp('(' + k + ')').exec(fmt)
    if (ret) {
      fmt = fmt.replace(ret[1], ret[1].length == 1 ? opt[k] : opt[k].padStart(ret[1].length, '0'))
    }
  }
  return fmt
}
/**
 * 日期格式化文字描述，样例 yyyy-mm-dd hh:MM:ss
 * @param stringTime 需要转换的日期
 */
export const getTimer = (stringTime) => {
  let minute = 1000 * 60
  let hour = minute * 60
  let day = hour * 24
  let week = day * 7
  let month = day * 30
  let time1 = new Date().getTime() //当前的时间戳
  let time2 = Date.parse(new Date(stringTime)) //指定时间的时间戳
  let time = time1 - time2

  let result = null
  if (time / month >= 1) {
    result = parseInt(time / month) + '月前'
  } else if (time / week >= 1) {
    result = parseInt(time / week) + '周前'
  } else if (time / day >= 1) {
    result = parseInt(time / day) + '天前'
  } else if (time / hour >= 1) {
    result = parseInt(time / hour) + '小时前'
  } else if (time / minute >= 1) {
    result = parseInt(time / minute) + '分钟前'
  } else {
    result = '刚刚'
  }
  return result
}

/**
 * 创建websocket
 * @param {*} data
 * @value {string} pageInfo 页面信息
 * @value {true} retry 是否重连，默认false
 * @returns 一个websocket实例
 */
export const makeSocket = async ({ pageInfo = '', retry = false }) => {
  const socket = {
    sockTask: null,
    close: function () {
      this.sockTask.close({
        code: 1000
      })
      closeFlag = true
    },
    onMessage: function () {
      console.log('onMessage')
    },
    onError: function () {
      console.log('onError')
    },
    onRetry: function () {
      console.log('onRetry')
    }
  }

  let limitedNum = 0
  let closeFlag = false
  let timer = null

  async function createSocket() {
    let url = ''
    if (env == 'production') {
      url = 'wss://api-client-yyt.qniao.cn/qn-websocket-service/wechatwebsock?token='
    } else if (env == 'test') {
      url = 'wss://api-client-yyt-test.qniao.cn/qn-websocket-service/wechatwebsock?token='
    }
    const token = store.state.qnToken
    const socketTask = await uni.connectSocket({
      url: `${url}${token}`,
      header: {
        'content-type': 'application/json'
      },
      success: () => {
        console.log('websocket连接成功')
      },
      fail: () => {
        console.log('websocket连接失败')
      }
    })
    socketTask.onOpen(() => {
      console.log(pageInfo + ' onOpen')
      timer = setInterval(() => {
        socketTask.send({
          data: 'ping'
        })
      }, 10000)
    })
    socketTask.onClose(() => {
      console.log(pageInfo + ' onClose')
      clearInterval(timer)
      timer = null
      if (!closeFlag && retry && limitedNum < 20) {
        limitedNum++
        console.log('重连次数:' + limitedNum)
        createSocket().then(() => {
          installSocket()
          socket.onRetry()
        })
      }
    })

    socket.sockTask = socketTask
  }

  await createSocket()
  function installSocket() {
    if (socket.sockTask) {
      socket.onMessage = (fn) => {
        socket.sockTask.onMessage((res) => {
          let data = JSON.parse(res.data)
          console.log(pageInfo + '接收到消息:', data)
          if (data.type != 'heartbeat') {
            fn(data)
          }
        })
      }
      socket.onError = (fn) => {
        socket.sockTask.onError((err) => {
          fn(err)
        })
      }
    }
  }
  installSocket()

  return socket
}

let _boundaryCheckingState = true

/**
 * {beyond:是否超出目标时间,day:天,hours:小时,minutes:分钟,seconds:秒钟}
 * @param time 计算时间
 * @param target 对照时间
 * @returns 时间差对象
 */
export const difTime = (time, target) => {
  if (isString(time)) {
    time = time.replace(/-/g, '/')
  }
  if (isString(target)) {
    target = target.replace(/-/g, '/')
  }
  let begin = new Date(time).getTime()
  // 兼容ios时间
  let end = new Date(target).getTime()
  let beyond = begin < end ? false : true
  let diff = Math.abs(begin - end)
  // 计算天数
  let day = Math.floor(diff / (24 * 3600 * 1000))
  day != day ? (day = 0) : ''
  diff = diff % (24 * 3600 * 1000)
  // 计算小时数
  let hours = Math.floor(diff / (3600 * 1000))
  hours != hours ? (hours = 0) : ''
  diff = diff % (3600 * 1000)
  // 计算分钟数
  let minutes = Math.floor(diff / (60 * 1000))
  minutes != minutes ? (minutes = 0) : ''
  diff = diff % (60 * 1000)
  // 计算秒数
  let seconds = Math.floor(diff / 1000)
  seconds != seconds ? (seconds = 0) : ''
  return {
    beyond,
    day,
    hours,
    minutes,
    seconds
  }
}

/**
 * 迭代操作
 */
function iteratorOperation(arr, operation) {
  const [num1, num2, ...others] = arr
  let res = operation(num1, num2)

  others.forEach((num) => {
    res = operation(res, num)
  })

  return res
}

/**
 * Return digits length of a number
 * @param {*number} num Input number
 */
function digitLength(num) {
  // Get digit length of e
  const eSplit = num.toString().split(/[eE]/)
  const len = (eSplit[0].split('.')[1] || '').length - +(eSplit[1] || 0)
  return len > 0 ? len : 0
}

/**
 * 把错误的数据转正
 * strip(0.09999999999999998)=0.1
 */
function strip(num, precision = 15) {
  return +parseFloat(Number(num).toPrecision(precision))
}

/**
 * 把小数转成整数，支持科学计数法。如果是小数则放大成整数
 * @param {*number} num 输入数
 */
function float2Fixed(num) {
  if (num.toString().indexOf('e') === -1) {
    return Number(num.toString().replace('.', ''))
  }
  const dLen = digitLength(num)
  return dLen > 0 ? strip(Number(num) * Math.pow(10, dLen)) : Number(num)
}

/**
 * 检测数字是否越界，如果越界给出提示
 * @param {*number} num 输入数
 */
function checkBoundary(num) {
  if (_boundaryCheckingState) {
    if (num > Number.MAX_SAFE_INTEGER || num < Number.MIN_SAFE_INTEGER) {
      console.warn(`${num} is beyond boundary when transfer to integer, the results may not be accurate`)
    }
  }
}

/**
 * 精确乘法
 */
function times(...nums) {
  if (nums.length > 2) {
    return iteratorOperation(nums, times)
  }

  const [num1, num2] = nums
  const num1Changed = float2Fixed(num1)
  const num2Changed = float2Fixed(num2)
  const baseNum = digitLength(num1) + digitLength(num2)
  const leftValue = num1Changed * num2Changed

  checkBoundary(leftValue)

  return leftValue / Math.pow(10, baseNum)
}

/**
 * 精确除法
 */
function divide(...nums) {
  if (nums.length > 2) {
    return iteratorOperation(nums, divide)
  }

  const [num1, num2] = nums
  const num1Changed = float2Fixed(num1)
  const num2Changed = float2Fixed(num2)
  checkBoundary(num1Changed)
  checkBoundary(num2Changed)
  // fix: 类似 10 ** -4 为 0.00009999999999999999，strip 修正
  return times(num1Changed / num2Changed, strip(Math.pow(10, digitLength(num2) - digitLength(num1))))
}

/**
 * 精确四舍五入
 */
export const round = (num, ratio) => {
  const base = Math.pow(10, ratio)
  let result = divide(Math.round(Math.abs(times(num, base))), base)
  if (num < 0 && result !== 0) {
    result = times(result, -1)
  }
  return result
}

/**
 * 根据规则校验字段
 * @param {*} value 输入值
 * @param {array} rules 规则集 {type,required,message}
 * @value {boolean} required 是否必填
 * @value {string} type 字段类型校验，目前支持 phone
 * @returns {object} {isValid,msg}
 */
export const validateField = (value, rules) => {
  let isValid = true
  let msg = ''
  for (let rule of rules) {
    if (rule.required) {
      if (value === '' || value === undefined || value === null) {
        isValid = false
        msg = rule.message
        break
      }
      if (isArray(value) && value.length === 0) {
        isValid = false
        msg = rule.message
        break
      }
    }
    if (rule.type === 'phone' && value !== '' && !/^1[3456789]\d{9}$/.test(value)) {
      isValid = false
      msg = rule.message
      break
    }
  }
  return {
    isValid,
    msg
  }
}

/**
 * 正确数字保留几位小数显示
 * @param {(number | string)} value 要修正的对象
 * @param {number} precision 保留位数
 * @returns {string}
 */
export const numToString = function (value, precision = 2) {
  const zeros = '00000000000000'
  let temp = ''
  try {
    temp = round(value, precision) + ''
    let dot = temp.indexOf('.')
    if (dot == -1) {
      temp = temp + '.' + zeros.substring(0, 0 + precision)
    } else {
      // 计算差几个0,精度 - 现有位数
      let digits = precision - (temp.length - dot - 1)
      digits > 0 ? (temp = temp + zeros.substring(0, digits)) : ''
    }
  } catch (error) {
    console.log('数字格式错误')
    return value
  }
  return temp
}

/**
 * 简易版防抖函数
 * @param {Function} fn 函数
 * @param {number} delay 延迟时间
 * @returns {Function}
 */
export function debounce(fn, delay) {
  let timer = null
  return function (...args) {
    if (timer) {
      clearTimeout(timer)
      timer = null
    }
    timer = setTimeout(() => {
      timer = null
      fn.apply(this, args)
    }, delay)
  }
}

/**
 * 简易版节流函数,可以带异步数据返回
 * @param {Function} fn 函数，如果需要返回内容则需要返回Promise，并在then中return内容
 * @param {number} delay 延迟时间单位毫秒
 */
export function throttle(fn, delay) {
  let timer = null,
    first = true,
    result = null,
    lastInvokeTime = 0,
    remainingTime = null
  return function (...args) {
    if (first) {
      result = fn.apply(this, args)
      first = false
      lastInvokeTime = Date.now()
      return result
    }
    // 如果上次调用时间与当前时间差大于等于delay，则直接执行
    if (Date.now() - lastInvokeTime >= delay) {
      result = fn.apply(this, args)
      lastInvokeTime = Date.now()
      return result
    } else {
      remainingTime = delay - (Date.now() - lastInvokeTime)
      if (timer) {
        clearTimeout(timer)
        createTimer.call(this, remainingTime, args)
      } else {
        createTimer.call(this, remainingTime, args)
      }
    }

    return result
  }

  function createTimer(time, args) {
    timer = null
    timer = setTimeout(() => {
      result = fn.apply(this, args)
      timer = null
      lastInvokeTime = Date.now()
    }, time)
  }
}

/**
 * 简易的解析地址的函数
 * @param {string} url 需要解析的url地址
 * @returns {object} {host,query}
 */
export function parseUrl(url) {
  let query = {}
  let host = url
  if (url.indexOf('?') > -1) {
    host = url.substring(0, url.indexOf('?'))
    let str = url.split('?')[1]
    let arr2 = str.split('&')
    arr2.forEach((item) => {
      let arr3 = item.split('=')
      query[arr3[0]] = arr3[1]
    })
  }
  return { host, query }
}

/**
 * 获取数组的所有子集
 * @param {Array} arr 数组
 * @returns Array<Array<any>>
 */
export function getAllSubsets(arr) {
  let res = [[]]
  for (let item of arr) {
    const tempRes = res.map((subset) => {
      const one = subset.concat([])
      one.push(item)
      return one
    })
    res = res.concat(tempRes)
  }
  return res
}