class Filter {
  N = 4
  num = 10
  dataArray = null
  // 初始化
  constructor() {
    this.dataArray = []
  }
  // 初始化队列
  initQueue() {
    this.dataArray = []
  }
  // 在队列首插入队列
  addQueueFront(value) {
    this.dataArray.unshift(value)
  }
  // 队列求和
  sumQueue() {
    let sum = 0
    for (let index = 0; index < this.N; index++) {
      sum += this.dataArray[index]
    }
    return sum
  }

  Smoothing_arithmetic_mean_FILTER() {
    let m = 0
    let re = 0
    let adder = 0
    for (let i = 0; i < this.N; i++) {
      if (this.dataArray[i] > 0) {
        adder += this.dataArray[i]
        m++
      }
    }
    if (m >= this.N) {
      re = this.sumQueue() / this.N
    } else {
      re = adder / m
    }
    return re
  }
}
// 
function joinTogether(x, fx) {
  return x + fx / 100
}

const dataFilterX = new Filter()
const datafilterY = new Filter()

function smooth(dot) {
  let dotX = joinTogether(dot.x, dot.fx)
  let dotY = joinTogether(dot.y, dot.fy)
  if (dot.dotType === 'PEN_DOWN') {
    dataFilterX.initQueue()
    datafilterY.initQueue()
    dataFilterX.addQueueFront(dotX)
    // console.log(dataFilterX.dataArray);
    datafilterY.addQueueFront(dotY)
    // console.log(datafilterY.dataArray);
    let dotAx = dataFilterX.Smoothing_arithmetic_mean_FILTER()
    let dotAy = datafilterY.Smoothing_arithmetic_mean_FILTER()
    return {
      ...dot,
      ab_x: dotAx,
      ab_y: dotAy
    }
  } else if (dot.dotType === "PEN_MOVE" && dot.force !== 1 && dot.force !== 2) {
    dataFilterX.addQueueFront(dotX)
    // console.log(dataFilterX.dataArray);
    datafilterY.addQueueFront(dotY)
    // console.log(datafilterY.dataArray);
    let dotAx = dataFilterX.Smoothing_arithmetic_mean_FILTER()
    let dotAy = datafilterY.Smoothing_arithmetic_mean_FILTER()
    return {
      ...dot,
      ab_x: dotAx,
      ab_y: dotAy
    }
  } else if (dot.tydotTypepe == "PEN_UP" || dot.force === 2 || dot.force === 1 || dot.force === 0) {
    let dotAx = dotX
    let dotAy = dotY
    return {
      ...dot,
      ab_x: dotAx,
      ab_y: dotAy
    }
  }
}

export default smooth