package {
          import flash.filters.ColorMatrixFilter;
          import flash.utils.setInterval;
          import flash.utils.setTimeout;
          
          import mx.controls.Image;
          
          public class @ax-student-twitter-swarm-AnimatedImage {
                  private var image:Image;
                  private var unselectedImages:Array, selectedImages:Array;
                  private var colorRed:Number, colorGreen:Number, colorBlue:Number;
                  private var selected:Boolean = false;
                  private var counter:int;
                  private var anim:Array;
                  
                  public function @ax-student-twitter-swarm-AnimatedImage(image:Image, anim:Array)        {
                          // Starts the animation at a random time so that the boids won't all 
                          // flap their wings at the same time.
  
                          this.image = image;
                          this.anim = anim;
                          this.colorRed = this.colorGreen = this.colorBlue = 0.5;
                          
                      setTimeout(startAnimation, Math.ceil(Math.random() * 300));
                  }
                  
                  public function setColor (color:Array):void        {
                          // Sets the color of the filter to the given color.
  
                          this.colorRed   = color[0];
                          this.colorGreen = color[1];
                          this.colorBlue  = color[2];
                          resetColor();
                  }
                  
                  private function startAnimation ():void {
                          // Starts the animation.
  
                          this.counter = 0;
                          setInterval(animateImage, 150);
                  }
                  
                  private function animateImage ():void {
                          this.image.source = anim[counter];
                          counter++;
                          if (counter > 3) counter = 0;
                  }
                  
                  private function makeGrayscale (): void {
                          // Filters the Image to greyscale.
                          
                          this.image.filters = []
                          var RedLum: Number = 0.2225;
                          var GreenLum: Number = 0.7169;
                          var BlueLum: Number = 0.0606;
                          
                          // channel Red, Green, Blue and Alpha, transforming the image in black and white
                          var bwMatrix: Array = [        RedLum, GreenLum, BlueLum, 0, 0,
                                                                          RedLum, GreenLum, BlueLum, 0, 0,
                                                                          RedLum, GreenLum, BlueLum, 0, 0,
                                                                          0, 0, 0, 1, 0];
                          
                          var filter:ColorMatrixFilter = new ColorMatrixFilter (bwMatrix);
                          this.image.filters = [filter];
                  } 
                  
                  private function makePurple (): void {
                          // Filters the image to become purple for when the boid is selected.
  
                          this.image.filters = []
                          var RedLum: Number = 1.0;
                          var GreenLum: Number = 0.3;
                          var BlueLum: Number = 1.0;
                          
                          // channel Red, Green, Blue and Alpha
                          var bwMatrix: Array = [        RedLum, 0, 0, 0, 0,
                                                                          0, GreenLum, 0, 0, 0,
                                                                          0, 0, BlueLum, 0, 0,
                                                                          0, 0, 0, 1, 0];
                          
                          var filter:ColorMatrixFilter = new ColorMatrixFilter (bwMatrix);
                          this.image.filters = [filter];
                  } 
                  
                  private function resetColor (): void {
                          // Filters the image back to the color that the boid was initialised with.
                          
                          this.image.filters = []
                          var RedLum: Number   = this.colorRed;
                          var GreenLum: Number = this.colorGreen;
                          var BlueLum: Number  = this.colorBlue;
                          
                          // channel Red, Green, Blue and Alpha
                          var bwMatrix: Array = [        RedLum, 0, 0, 0, 0,
                                                                          0, GreenLum, 0, 0, 0,
                                                                          0, 0, BlueLum, 0, 0,
                                                                          0, 0, 0, 1, 0];
                          
                          var filter:ColorMatrixFilter = new ColorMatrixFilter (bwMatrix); 
                          this.image.filters = [filter]; 
                  }
                                  
                  public function move(x:int, y:int):void {
                          this.image.x = x - 15;
                          this.image.y = y - 23;
                  }
                  
                  public function rotate(rotation:Number):void {
                          this.image.rotation = rotation;
                  }
                  
                  public function select ():void {
                          this.selected = true;
                          makePurple();
                  }
                  public function deselect ():void {
                          this.selected = false;
                          resetColor();
                  }
                  public function getImage ():Image {
                          return this.image;
                  }
          }
  }