codecombat/app/lib/surface/Mark.coffee

CocoClass = require 'lib/CocoClass'
Camera = require './Camera'

module.exports = class Mark extends CocoClass
  subscriptions: {}

  constructor: (options) ->
    super()
    options ?= {}
    @name = options.name
    @sprite = options.sprite
    @camera = options.camera
    @layer = options.layer
    @thangType = options.thangType
    console.error @toString(), "needs a name." unless @name
    console.error @toString(), "needs a camera." unless @camera
    console.error @toString(), "needs a layer." unless @layer
    @build()

  destroy: ->
    @mark?.parent?.removeChild @mark
    super()

  toString: -> "<Mark #{@name}: Sprite #{@sprite?.thang?.id ? 'None'}>"

  toggle: (to) ->
    return @ if to is @on
    @on = to
    if @on
      @layer.addChild @mark
      @layer.updateLayerOrder()
    else
      @layer.removeChild @mark
      if @highlightTween
        @highlightDelay = @highlightTween = null
        createjs.Tween.removeTweens @mark
        @mark.visible = true
    @

  setSprite: (sprite) ->
    return if sprite is @sprite
    @sprite = sprite
    @build()
    @

  build: ->
    unless @mark
      if @name is 'bounds' then @buildBounds()
      else if @name is 'shadow' then @buildRadius()
      else if @name is 'debug' then @buildDebug()
      else if @thangType then @buildSprite()
      else console.error "Don't know how to build mark for", @name
      @mark.mouseEnabled = false
    @

  buildBounds: ->
    @mark = new createjs.Container()
    @mark.mouseChildren = false

    # Confusingly make some semi-random colors that'll be consistent based on the drawsBoundsIndex
    index = @sprite.thang.drawsBoundsIndex
    colors = (128 + Math.floor(('0.'+Math.sin(3 * index + i).toString().substr(6)) * 128) for i in [1 ... 4])
    color = "rgba(#{colors[0]}, #{colors[1]}, #{colors[2]}, 0.5)"

    shape = new createjs.Shape()
    shape.graphics.setStrokeStyle 5
    shape.graphics.beginStroke color
    shape.graphics.beginFill color.replace('0.5', '0.25')
    [w, h] = [@sprite.thang.width * Camera.PPM, @sprite.thang.height * Camera.PPM * @camera.y2x]
    if @sprite.thang.shape in ["ellipsoid", "disc"]
      shape.drawEllipse 0, 0, w, h
    else
      shape.graphics.drawRect -w / 2, -h / 2, w, h
    shape.graphics.endStroke()
    shape.graphics.endFill()

    text = new createjs.Text "" + index, "20px Arial", color.replace('0.5', '1')
    text.regX = text.getMeasuredWidth() / 2
    text.regY = text.getMeasuredHeight() / 2
    text.shadow = new createjs.Shadow("#000000", 1, 1, 0)

    @mark.addChild shape, text
    if w > 0 and h > 0
      @mark.cache -w / 2, -h / 2, w, h, 2
    @lastWidth = @sprite.thang.width
    @lastHeight = @sprite.thang.height

  buildRadius: ->
    # TODO: make this not just a shadow
    # TODO: draw boxes and ellipses for non-circular Thangs
    diameter = @sprite.thangType.get('shadow') ? @sprite.thang?.width + 0.5
    diameter *= Camera.PPM
    @mark = new createjs.Shape()
    @mark.mouseEnabled = false
    @mark.graphics.beginFill "black"
    @mark.graphics.drawEllipse 0, 0, diameter, diameter * @camera.y2x
    @mark.graphics.endFill()
    @mark.regX = diameter / 2
    @mark.regY = diameter / 2 * @camera.y2x
    @mark.layerIndex = 10
    #@mark.cache 0, 0, diameter, diameter  # not actually faster than simple ellipse draw

  buildDebug: ->
    @mark = new createjs.Shape()
    PX = 3
    [w, h] = [Math.max(PX, @sprite.thang.width * Camera.PPM), Math.max(PX, @sprite.thang.height * Camera.PPM) * @camera.y2x]
    @mark.alpha = 0.5
    @mark.graphics.beginFill '#abcdef'
    if @sprite.thang.shape in ["ellipsoid", "disc"]
      [w, h] = [Math.max(PX, w, h), Math.max(PX, w, h)]
      @mark.graphics.drawCircle 0, 0, w / 2
    else
      @mark.graphics.drawRect -w / 2, -h / 2, w, h
    @mark.graphics.endFill()

  buildSprite: ->
    #console.log "building", @name, "with thangtype", @thangType
    CocoSprite = require './CocoSprite'
    markSprite = new CocoSprite @thangType, @thangType.spriteOptions
    markSprite.queueAction 'idle'
    @mark = markSprite.displayObject

  update: (pos=null) ->
    return false unless @on
    @updatePosition pos
    @updateRotation()
    @updateScale()
    @mark.advance?()
    if @name is 'highlight' and @highlightDelay and not @highlightTween
      @mark.visible = false
      @highlightTween = createjs.Tween.get(@mark).to({}, @highlightDelay).call =>
        @mark.visible = true
        @highlightDelay = @highlightTween = null
    true

  updatePosition: (pos) ->
    if @name in ['shadow', 'debug']
      pos = @camera.worldToSurface x: @sprite.thang.pos.x, y: @sprite.thang.pos.y
      if @name is 'shadow'
        worldZ = @sprite.thang.pos.z - @sprite.thang.depth / 2
        @mark.alpha = 0.451 / Math.sqrt(worldZ / 2 + 1)
    else
      pos ?= @sprite?.displayObject
    @mark.x = pos.x
    @mark.y = pos.y
    if @name is 'highlight'
      offset = @sprite.getOffset 'aboveHead'
      @mark.x += offset.x
      @mark.y += offset.y

  updateRotation: ->
    if @name is 'debug'
      @mark.rotation = @sprite.thang.rotation * 180 / Math.PI

  updateScale: ->
    if @name is 'bounds' and (@sprite.thang.width isnt @lastWidth or @sprite.thang.height isnt @lastHeight)
      oldMark = @mark
      @buildBounds()
      oldMark.parent.addChild @mark
      oldMark.parent.swapChildren oldMark, @mark
      oldMark.parent.removeChild oldMark
    return unless @name in ["selection", "target", "repair", "highlight"]
    scale = 0.5
    if @sprite
      size = @sprite.getAverageDimension()
      size += 60 if @name is 'selection'
      size += 60 if @name is 'repair'
      scale = size / {selection: 128, target: 128, repair: 320, highlight: 160}[@name]
      if @sprite?.thang.spriteName.search(/dungeon.wall/i) isnt -1
        scale *= 2
    @mark.scaleX = @mark.scaleY = Math.min 1, scale
    if @name in ['selection', 'target', 'repair']
      @mark.scaleY *= @camera.y2x  # code applies perspective