const MIN_DISTANCE = 10

function getDirection(x, y) {
  if (x > y && x > MIN_DISTANCE) {
    return 'horizontal'
  }

  if (y > x && y > MIN_DISTANCE) {
    return 'vertical'
  }

  return ''
}

export const touch = {
  methods: {
    resetTouchStatus() {
      this.direction = ''
      this.deltaX = 0
      this.deltaY = 0
      this.offsetX = 0
      this.offsetY = 0
    },

    touchStart(event) {
      this.resetTouchStatus()
      const touch = event.touches[0]
      this.startX = touch.clientX
      this.startY = touch.clientY
    },

    touchMove(event) {
      const touch = event.touches[0]
      this.deltaX = touch.clientX - this.startX
      this.deltaY = touch.clientY - this.startY
      this.offsetX = Math.abs(this.deltaX)
      this.offsetY = Math.abs(this.deltaY)
      this.direction =
        this.direction || getDirection(this.offsetX, this.offsetY)
    }
  }
}
