package net.abesto.kotlin.js.pixi.examples.example_04

import kotlin.browser.*
import org.w3c.dom.*
import jquery.jq

import net.abesto.kotlin.js.pixi.*
import net.abesto.kotlin.js.extensions.*
import net.abesto.kotlin.js.pixi.display.Sprite
import net.abesto.kotlin.js.pixi.utils.autoDetectRenderer
import net.abesto.kotlin.js.pixi.display.Stage
import net.abesto.kotlin.js.pixi.textures.Texture


class Star(var sprite: Sprite, var x: Double, var y: Double)


fun main(args: Array<String>) {
    //	Globals, globals everywhere and not a drop to drink
    var w = 1024L
    var h = 768L
    var starCount = 2500
    var sx = 1.0 + (Math.random() / 20)
    var sy = 1.0 + (Math.random() / 20)
    var slideX = w / 2
    var slideY = h / 2
    var stars: Array<Star> = array()
    var renderer = autoDetectRenderer(w, h)
    var stage = Stage(0)


    fun newWave() {
        sx = 1.0 + (Math.random() / 20)
        sy = 1.0 + (Math.random() / 20)
        (document.getElementById("sx") as HTMLElement).innerHTML = "SX: " + sx + "<br />SY: " + sy
    }

    fun resize() {
        w = jq(window).width().toLong() - 16
        h = jq(window).height().toLong() - 16

        slideX = w / 2
        slideY = h / 2

        renderer.resize(w, h)
    }

    fun update() {
        for (i in 0..(starCount - 1)) {
            stars[i].sprite.position.x = stars[i].x + slideX
            stars[i].sprite.position.y = stars[i].y + slideY
            stars[i].x = stars[i].x * sx
            stars[i].y = stars[i].y * sy

            if (stars[i].x > w) {
                stars[i].x = stars[i].x - w
            } else if (stars[i].x < -w) {
                stars[i].x = stars[i].x + w
            }

            if (stars[i].y > h) {
                stars[i].y = stars[i].y - h
            } else if (stars[i].y < -h) {
                stars[i].y = stars[i].y + h
            }
        }

        renderer.render(stage)

        requestAnimFrame(::update)
    }

    jq(window).resize(::resize)
    window.onorientationchange = (::resize)

    fun start() {

        var ballTexture = Texture.fromImage("assets/bubble_32x32.png")

        document.body!!.appendChild(renderer.view)

        for (i in 0..(starCount - 1)) {
            var tempBall = Sprite(ballTexture)

            tempBall.position.x = (Math.random() * w) - slideX
            tempBall.position.y = (Math.random() * h) - slideY
            tempBall.anchor.x = 0.5
            tempBall.anchor.y = 0.5

            stars.push(Star(tempBall, tempBall.position.x, tempBall.position.y))
            stage.addChild(tempBall)
        }

        (document.getElementById("rnd") as HTMLElement).onclick = { newWave() }
        (document.getElementById("sx") as HTMLElement).innerHTML = "SX: " + sx + "<br />SY: " + sy
        resize()
        requestAnimFrame(::update)
    }
    jq({ start() })
}