//TODO
//DONE
//reverse order of drawing
//anchor block
//make boxes stick to sides after inequality

void setup(){
  size(500,500);
  reset();
  frameRate(30);
}
Gift g;//= new Gift(105,105,40,0); //was 3
void draw(){
  background(255);
 g.moveKids();
 g.draw(); 
}


flaot speedmul = 1; 

void reset(){
       g= new Gift(mouseX,mouseY,random(20,40),3,true);//was 3 or 4 
      g.x = 250;
      g.y = 250;
}

void keyPressed(){
  if(key == ' '){
  reset();
}
}
void mousePressed(){mouseDragged();}
void mouseDragged(){
   g.x = mouseX;
  g.y = mouseY;
  speedmul = map(mouseY,500,0,.2,2);
}


class GiftHolder{
  Gift g; int side;float rotspeed;
   GiftHolder(Gift g, int side, float rotspeed){
     this.g = g;
    this.side = side;
   this.rotspeed = rotspeed; 
   } 
  
  void moveGift(Gift parent){
     if(side == LEFT){
          g.y -= rotspeed * speedmul;
          if(g.y + g.ysz < 0){
            side = TOP;
            g.y  = 0 - g.ysz;
            return;
          }        
          
          if(g.y > parent.ysz){
             side=BOTTOM;
             g.y = parent.ysz;
            return; 
          }
          

     }
     if(side == RIGHT){
        
          g.y += rotspeed * speedmul;
          if(g.y > parent.ysz){
            side = BOTTOM;
            g.y = parent.ysz;
     return;  

          }        
          if(g.y  + g.ysz < 0 ){
            side = TOP;
            g.y  = -g.ysz;
           return;  
          }        


   }
   
      if(side == TOP){
        g.x += rotspeed * speedmul;
           if(g.x >  parent.xsz){
             side = RIGHT;
             g.x = parent.xsz;
         return; 
           }
           if(g.x + g.xsz < 0){
              side = LEFT;
              g.x = -g.xsz;
              return;
           } 
      }
       if(side == BOTTOM){
          g.x -= rotspeed * speedmul;
           if(g.x + g.xsz < 0){
             side = LEFT;
             g.x = -g.xsz;
        return;

           }
            if(g.x >  parent.xsz){
               side = RIGHT;
              g.x =  parent.xsz;
              return; 
            }
     } 


  }
  
}

class Gift {
  
  float x,y,z,xsz,ysz,ribwidth;
  color col, ribcol;

  float SPEEDRANGE = width / 50;
  float ROTRANGE = .3;
  float SIZEMIN = width / 12.0;
  float SIZEMAX = width / 6.0;
  float GRAV = .5;
  
  ArrayList<GiftHolder> kids = new ArrayList<GiftHolder>();

  GiftHolder anchor = null;
//  String dir;
  
  Gift(float x, float y, float z, int kidCount, boolean hasAnchor){
    if(hasAnchor){
       anchor = new GiftHolder(new Gift(xsz,0,0,0,false),RIGHT,random(-3,3)); 
    }
    
    this.x = x;
    this.y = y;
    xsz = z; //random(SIZEMIN,SIZEMAX);
    //println(width);
    ysz = z;// random(SIZEMIN,SIZEMAX);
    
    ribwidth = min(xsz,ysz)/4;
    col = color(random(128,255),random(128,255),random(128,255));
    ribcol = color(random(128,255),random(128,255),random(128,255));
    idCount = 0;
    for(int i = 0; i < kidCount ;i++){
        kids.add(new GiftHolder(new Gift(xsz,0,random(SIZEMIN,SIZEMAX),kidCount-1,false),RIGHT,random(-6,6)));
      
    }
 
  }
  
  void moveKids(){
    if(anchor != null){
       anchor.moveGift(this); 
    }
    for(GiftHolder kid : kids){
       kid.moveGift(this);
       kid.g.moveKids();
    }
      
  }
  


  void draw(){
    rectMode(CORNER);
    ellipseMode(CENTER);
    fill(col);
    noStroke();
    pushMatrix();

    float cx = x ;

    float cy = y ;

    translate(cx,cy);        
    //rotate(r);

    if(anchor != null){
      translate(-anchor.g.x,-anchor.g.y);
      //anchor.g.draw();    
    }


    for(GiftHolder kid : kids){
       kid.g.draw(); 
    }




    rect(0,0,xsz,ysz);
    fill(ribcol);
    rect((xsz-ribwidth)/2,0,ribwidth,ysz);
    rect(0,(ysz-ribwidth)/2,xsz,ribwidth);
    ellipse(ysz/2,0,ribwidth*2,ribwidth*2);

    popMatrix();



    
  }

}