// bunnymark
var render = use('render')
var os = use('os')
var dim = [500,500]
render.initialize({
  width:dim.x,
  height:dim.y,
  resolution_x:dim.x,
  resolution_y:dim.y,
  mode:"letterboxed",
  refresh: 60,
})

var camera = {
  size: [500,500],
  transform: os.make_transform(),
  fov:50,
  near_z: 0,
  far_z: 1000,
  surface: undefined,
  viewport: {x:0,y:0,width:1,height:1},
  ortho:true,
  anchor:[0,0],
}

var draw = use('draw2d')
var sprite = use('lcdsprite')
var graphics = use('graphics')

var bunny = graphics.texture('tests/bunny')

var center = [0.5,0.5]

var vel = 50

function hsl_to_rgb(h, s, l) {
  var c = (1 - Math.abs(2 * l - 1)) * s
  var x = c * (1 - Math.abs((h / 60) % 2 - 1))
  var m = l - c / 2
  var r = 0, g = 0, b = 0

  if      (h <  60) { r = c; g = x }
  else if (h < 120) { r = x; g = c }
  else if (h < 180) { g = c; b = x }
  else if (h < 240) { g = x; b = c }
  else if (h < 300) { r = x; b = c }
  else              { r = c; b = x }

  return [r + m, g + m, b + m, 1]  // 0‒1 floats, alpha = 1
}

var bunny_count = 2000

for (var i = 0; i < bunny_count; i++) {
  var pct = i/bunny_count
  var sp = sprite.create(bunny, [Math.random()*dim.x*pct, Math.random()*dim.y*pct], center)
  sp.dir = [Math.random()*vel, Math.random()*vel]
  var hue = 270 * i / bunny_count
  sp.color = hsl_to_rgb(hue, 0.5, 0.5)
}

function movendraw(sp)
{
  sp.move([sp.dir[0]*dt, sp.dir[1]*dt])
//  sp.draw()
}

var dt = 0
var fps_samples = []
var fps_window = 10
var fps_update_period = 0.5
var last_fps_update = os.now()
function loop()
{
  var now = os.now()
  render.clear([22/255,120/255,194/255,255/255])
  render.camera(camera)

//  sprite.forEach(movendraw)
  var queue = sprite.queue()

  for (var q of queue)
    render.geometry(q.image.texture, q.mesh)

  render.present()
  dt = os.now() - now

  fps_samples.push(dt)
  if (fps_samples.length > fps_window) fps_samples.shift()

  if (now - last_fps_update >= fps_update_period) {
    var sum = 0
    for (var i = 0; i < fps_samples.length; i++) sum += fps_samples[i]
    prosperon.window.title = `Bunnymark [fps: ${(fps_samples.length/sum).toFixed(1)}]`;
    last_fps_update = now
  }

  var delay = (1/60) - dt
  $_.delay(loop, delay)
}

loop()