class Particle{
    
  constructor(svg, coordinates, friction){
    this.svg = svg
    this.steps = ($(window).height())/2
    this.item = null
    this.friction = friction
    this.coordinates = coordinates
    this.position = this.coordinates.y
    this.dimensions = this.render()
    this.rotation = Math.random() > 0.5 ? "-" : "+"
    this.scale = 0.5 + Math.random()
    this.siner = 200 * Math.random()
  }
  
  destroy(){
    this.item.remove()
  }
  
  move(){
    this.position = this.position - this.friction
    let top = this.position;
    let left = this.coordinates.x + Math.sin(this.position*Math.PI/this.steps) * this.siner;
    this.item.css({
      transform: "translateX("+left+"px) translateY("+top+"px) scale(" + this.scale + ") rotate("+(this.rotation)+(this.position + this.dimensions.height)+"deg)"
    })

    if(this.position < -(this.dimensions.height)){
      this.destroy()
      return false
    }else{
      return true
    }
  }
  
  render(){
    this.item = $(this.svg, {
      css: {
        transform: "translateX("+this.coordinates.x+"px) translateY("+this.coordinates.y+"px)"
      }
    })
    $("body").append(this.item)
    return {
      width: this.item.width(),
      height: this.item.height()
    }
  }
}

const rhombus = '<svg viewBox="0 0 13 14"><path class="rhombus" d="M5.9,1.2L0.7,6.5C0.5,6.7,0.5,7,0.7,7.2l5.2,5.4c0.2,0.2,0.5,0.2,0.7,0l5.2-5.4 C12,7,12,6.7,11.8,6.5L6.6,1.2C6.4,0.9,6.1,0.9,5.9,1.2L5.9,1.2z M3.4,6.5L6,3.9c0.2-0.2,0.5-0.2,0.7,0l2.6,2.6 c0.2,0.2,0.2,0.5,0,0.7L6.6,9.9c-0.2,0.2-0.5,0.2-0.7,0L3.4,7.3C3.2,7.1,3.2,6.8,3.4,6.5L3.4,6.5z" /></svg>'

const pentahedron = '<svg viewBox="0 0 561.8 559.4"><path class="pentahedron" d="M383.4,559.4h-204l-2.6-0.2c-51.3-4.4-94-37-108.8-83l-0.2-0.6L6,276.7l-0.2-0.5c-14.5-50,3.1-102.7,43.7-131.4 L212.1,23C252.4-7.9,310.7-7.9,351,23l163.5,122.5l0.4,0.3c39,30.3,56,82.6,42.2,130.3l-0.3,1.1l-61.5,198 C480.4,525.6,435.5,559.4,383.4,559.4z M185.5,439.4h195.2l61.1-196.8c0-0.5-0.3-1.6-0.7-2.1L281.5,120.9L120.9,241.2 c0,0.3,0.1,0.7,0.2,1.2l60.8,195.8C182.5,438.5,183.7,439.1,185.5,439.4z M441,240.3L441,240.3L441,240.3z"/></svg>'
const x = '<svg viewBox="0 0 12 12"> <path class="x" d="M10.3,4.3H7.7V1.7C7.7,0.8,7,0,6,0S4.3,0.8,4.3,1.7v2.5H1.7C0.8,4.3,0,5,0,6s0.8,1.7,1.7,1.7h2.5v2.5 C4.3,11.2,5,12,6,12s1.7-0.8,1.7-1.7V7.7h2.5C11.2,7.7,12,7,12,6S11.2,4.3,10.3,4.3z"/></svg>'

const circle = '<svg x="0px" y="0px" viewBox="0 0 13 12"> <path class="circle" d="M6.5,0.1C3.4,0.1,0.8,2.8,0.8,6s2.6,5.9,5.7,5.9s5.7-2.7,5.7-5.9S9.7,0.1,6.5,0.1L6.5,0.1z M6.5,8.8 C5,8.8,3.8,7.6,3.8,6S5,3.2,6.5,3.2S9.2,4.4,9.2,6S8,8.8,6.5,8.8L6.5,8.8z"/> </svg>'

const point = '<svg viewBox="0 0 12 12"> <path class="point" d="M6,7.5L6,7.5C5.1,7.5,4.5,6.9,4.5,6v0c0-0.9,0.7-1.5,1.5-1.5h0c0.9,0,1.5,0.7,1.5,1.5v0C7.5,6.9,6.9,7.5,6,7.5z "/> </svg>'

function randomInt(min,max){
    return Math.floor(Math.random()*(max-min+1)+min);
}

const data = [point, rhombus, pentahedron, circle, x]

let isPaused = false;
window.onblur = function() {
    isPaused = true;
}.bind(this)
window.onfocus = function() {
    isPaused = false;
}.bind(this)

let particles = []

setInterval(function(){
  if (!isPaused){
    particles.push(
      new Particle(data[randomInt(0,data.length-1)], {
       "x": (Math.random() * $(window).width()),
       "y": $(window).height()
      }, (1 + Math.random() * 3) )
    )
  }
}, 200)

function update(){
  particles = particles.filter(function(p){
    return p.move()
  })
  requestAnimationFrame(update.bind(this))
}
update()